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CN101490642A - Input device - Google Patents

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Publication number
CN101490642A
CN101490642A CNA2007800268494A CN200780026849A CN101490642A CN 101490642 A CN101490642 A CN 101490642A CN A2007800268494 A CNA2007800268494 A CN A2007800268494A CN 200780026849 A CN200780026849 A CN 200780026849A CN 101490642 A CN101490642 A CN 101490642A
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CN
China
Prior art keywords
electrode
electrodes
operator scheme
input equipment
control circuit
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Pending
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CNA2007800268494A
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Chinese (zh)
Inventor
B·谢尔班
P·布瓦耶
A·朔斯
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IEE International Electronics and Engineering SA
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IEE International Electronics and Engineering SA
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Priority claimed from US11/488,241 external-priority patent/US8063886B2/en
Application filed by IEE International Electronics and Engineering SA filed Critical IEE International Electronics and Engineering SA
Publication of CN101490642A publication Critical patent/CN101490642A/en
Pending legal-status Critical Current

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Abstract

An input device is provided with a membrane-based pressure sensor made of a first carrier membrane, a second carrier membrane and a spacer arranged between the carrier membranes to space them at a distance from each other. The spacer has an opening defining an active area in which the first and second electrodes are arranged such that electrical contact is established between the first and second electrodes in response to a compressive force acting on the active area. The control circuit, which is operable in at least first and second modes of operation, is configured to measure, in the first mode of operation, a quantity indicative of the electrical resistance between the first and second electrodes for detecting the amount or position of a compressive force acting on said active area, and to measure, in the second mode of operation, a quantity indicative of the electrical capacitance for detecting a person or object approaching there.

Description

Input equipment
Technical field
The present invention relates to input equipment, and relate more specifically to comprise the input equipment that is used for people-equipment interaction based on the pressure transducer of film.
Background technology
Input equipment is generally used for combining with electronic apparatus, the input of with to the multiple input of latter's feed-in, comprise the control input of the behavior that for example directly or indirectly influences utensil, being handled by utensil and/or only be the input of storage.
Structure is known based on the input equipment of the pressure transducer of film type, and the resistance of this pressure transducer changes with pressure.The pressure transducer of this film type comprises two carrier films, and by means of sept, they are arranged in a certain distance apart from one another.Sept is provided with the opening of the active zone of at least one limit sensor, and wherein two carrier films face with each other.In this active zone, on carrier film, arrange at least two electrodes, its arrangement makes, under the effect of the force of compression in the active zone that is acting on the sensor two carrier films is pressed onto a time-out, sets up to electrically contact between two electrodes.Survey and/or determine to act on pressure on the sensor as the function of the resistance between the electrode.
Depend on the application of this pressure transducer, can dispose the layer of semiconductor material between electrode, make sensor demonstrate the presser sensor behavior of gradual change, that is to say, its resistance gradually changes or even variation continuously as the function of institute's applied pressure.Semiconductor material layer can comprise that its internal resistance is as the function of compression or the material that changes as the function of the distortion of layer, or comprise following material: its surface structure is given this laminar surface resistance, along with the increase of the quantity of the contact point of the conductive surface of electrode, this surface resistance has reduced, under the effect of force of compression, press this conductive material layer near electrode.
WO 2004/049364 relates to the input equipment that comprises several keys, and this key is arranged at least two row.The check position detector of film type structure is related with every line unit.Each check position sensor makes it possible to along the direction of check position detector the key that is activated be surveyed.The key that the check position sensor-interconnect becomes to make control circuit can survey in which row activated.
Different types of sensor is based on capacitance sensing.US 3896425 discloses the electric proximity detector of the change in the environment of the sensitive volume that sensing limits.Detector comprise by oscillator drives and the antenna of emission electric field in the sensitive volume.The change of the electric field that people in the intrusion sensitive volume or object cause antenna, it is surveyed by detector.For the electric field of shaping antenna, detector comprises first screen and the second grounded shield thing, and first screen has the signal of same magnitude and phase place to drive by the signal of oscillator utilization and antenna.
Based on other sensor of electric field or " electric capacity " sensing by J.Smith etc. at " Electric FieldSensing for Graphical Interfaces ", IEEE Computer Graphics and Applications, Issue May/June 1998,54-60, in propose as people-computer interface.This interface is based on the electrode of the gesture of surveying the user.
The integral body of above-mentioned document is incorporated into this with them by reference.
Summary of the invention
The purpose of this invention is to provide improved input equipment.
A kind of input equipment (key that for example is used for keyboard or keypad, the pad that touches that is used for controlling cursor or display, touch-screen etc.) comprises that the pressure transducer based on film, described pressure transducer comprise first carrier film, second carrier film and be arranged in sept between described first and second carrier films.Described pressure transducer also comprises the arrangement of electrodes with at least the first electrode and second electrode, described arrangement of electrodes places between described first and second carrier films, make when compression force is on described pressure transducer, make described first and second carrier films more together close, and the situation of measurable first electric parameter between described first and second electrodes when not having force of compression to put on the described pressure transducer change.According to the present invention, described input equipment comprises control circuit, and described control circuit is connected to described first and second electrodes, and is configured to operate at least the first and second operator schemes.Described control circuit is configured to, in the time of in described first operator scheme, determine described first electric parameter between described first and second electrodes, described first electric parameter represents to act on the force of compression on the described pressure transducer, and in described second operator scheme time, determine second electric parameter of the electric capacity of described first electrode of expression.
Skilled person in the art will appreciate that described first operator scheme is related with the detection to the characteristic that acts on the force of compression on the input equipment, the amount of applied force (or pressure) for example, the position of the application point of this power etc.Second operator scheme with to the detection of the electric capacity between described first electrode and its surround related (in some occasion, we use phrase " electric capacity of first electrode " to be used for indicating more accurately " by the electric capacity of first electrode and the formed capacitor of its surround ").Therefore, in second operator scheme, input equipment can be surveyed the item of the change of the electric capacity that comprises first electrode, and near input equipment or touching input equipment, and the applied pressure deficiency is enough in and makes first and second carrier films more together close such as for example user's finger.Second operator scheme can be considered as the degree of approach-sensing modes, and first operator scheme is equivalent to " pressure-sensing " pattern.
Should be noted that it mainly is intended to distinguish operator scheme when the binding operation pattern is used term " first " and " second ", and this term should not be construed as expression operator scheme order in time.Control circuit can operate in first operator scheme before or after operating in second operator scheme.For example, control circuit can at first operate in second operator scheme, and only switches to first operator scheme when detecting people or object near active zone.Control circuit preferably switches between operator scheme circularly, and for example per second for several times.Yet preferably, control circuit remains on the degree of approach-sensing modes (second pattern), up to detecting the approaching of entity with electric field influence character.Alternatively, control circuit can remain on pressure-sensing modes (first pattern), surpasses predetermined threshold up to detecting power or pressure.
According to the of the present invention first main aspect, when being configured in first operator scheme, control circuit determines the electric parameter of the resistance between expression first and second electrodes.This parameter of expression resistance can comprise electric current, voltage and/or resistance self for example (amount).
According to the of the present invention second main aspect, when being configured in first operator scheme, control circuit determines the electric parameter of the electric capacity between expression first and second electrodes.
For presenting purpose, the parameter of electric capacity " expression " can be any physical quantity that is interrelated by physical law and electric capacity, such as the characteristic (such as amplitude, phase place, in-phase component, 90 ° of phase shift component etc.) of the load current of duration of charging of for example electrode, oscillation period, oscillation frequency, impedance, inflow electrode.
General introduction of the present invention according to the of the present invention first main aspect is provided now.
According to the of the present invention first main aspect, input equipment is provided with the pressure transducer based on film, and described pressure transducer comprises first carrier film, second carrier film and is arranged in and is used to make their septs of a distance that separates each other between the described carrier film.Sept has the opening that defines active zone, and wherein, it is feasible in response to the force of compression that acts on the active zone that first and second arrangement of electrodes become, and sets up to electrically contact between first and second electrodes.The control circuit that can operate at least the first and second operator schemes is configured to measure the parameter of representing the resistance between first and second electrodes in first operator scheme, be used to survey the amount or the position that act on the force of compression on the active zone, and be configured in second operator scheme, measure the parameter of representing electric capacity, be used to survey people or object near the there.
According to first embodiment of the of the present invention first main aspect, first carrier film has first electrode that applies on it, and second carrier film has second electrode that applies on it.First and second electrodes are faced each other at active zone, make in response to the force of compression that acts on active zone on the pressure transducer, first and second carrier films are pressed onto together and set up between first and second electrodes to electrically contact.Control circuit is configured to measure the parameter of the resistance between expression first and second electrodes in first operator scheme, be used to survey the amount that acts on the force of compression on the active zone, and be configured in second operator scheme, measure the parameter of expression by the electric capacity of first electrode and the formed capacitor of its surround, be used to survey people or object near the there.The surround of first electrode can for example comprise the part of user's health, such as their hand or finger.The parameter of expression electric capacity can be any physical quantity that is interrelated by physical law and electric capacity, such as the amplitude of amplitude, impedance or the voltage of for example electric current.For example, for the given voltage that puts on first electrode, the amount that flows into the electric current of first electrode depends on and therefore represents the electric capacity of first electrode.
Input equipment according to first embodiment of the of the present invention first main aspect preferably includes first module and second module, first module-specific is measured the parameter of expression resistance in first operator scheme, second module-specific is measured the parameter of the electric capacity of expression first electrode in second operator scheme.
First module can for example comprise current source and tension measuring circuit, current source may be operably coupled to first and second electrodes in first operator scheme, if electrically contact then produce electric current by first and second electrodes so that between first and second electrodes, set up, tension measuring circuit may be operably coupled to first and second electrodes in first operator scheme, be used to measure the voltage between them, this voltage is represented the resistance between first and second electrodes.Alternatively or additionally, first module can comprise voltage source and current measurement circuit, voltage source may be operably coupled to first and second electrodes in first operator scheme, be used between them, producing voltage, current measurement circuit is operably connected in first operator scheme, be used to measure the electric current that flows through first and second electrodes, in the case, this electric current is represented the resistance between first and second electrodes.
Second module can for example comprise AC voltage source and current measurement circuit, the AC voltage source may be operably coupled at least the first electrode in second operator scheme, be used for applying oscillating voltage to first electrode, current measurement circuit is operably connected in second operator scheme, be used to measure the electric current that flows into first electrode, the electric current that flows into first electrode is represented the electric capacity of first electrode.Preferably, the AC voltage source may be operably coupled to first and second electrodes in second operator scheme, so that apply the voltage of basic identical phase place and amplitude to first and second electrodes.In the case, potential difference (PD) between first and second electrodes keeps near zero, makes second electrode screening, first electrode.
According to the input equipment of first embodiment of the of the present invention first main aspect, advantageously comprise the switch unit of control switching circuit between at least the first and second operator schemes.
Should be appreciated that first and/or second electrode can comprise the presser sensor layer, for example with active zone in corresponding another electrodes of first and second electrodes become the semiconductor layer of arranging in the face of relation.The material that material that resistance changed as the function of the function of force of compression or distortion in the presser sensor layer can comprise or surface structure are given this laminar surface resistance, this surface resistance with the increasing and reduce of the quantity of the contact point of the conductive surface of electrode, near this electrode, press down the layer of semiconductor material in the effect of force of compression.
Preferably, control circuit is configured to export in response to first output signal of the parameter of expression resistance with in response to second output signal of the parameter of the electric capacity of expression first electrode.Control circuit can comprise for example first and second outputs and be configured to export first output signal and export second output signal at second output terminal at first output terminal.
Except that the distortion according to the of the present invention first main aspect, first and second electrodes are formed integrally as usually, and first electrode is subdivided at least two electrode parts.In the case, described at least two electrodes part can be that electricity separates in second operator scheme at least, and each that makes it possible to described at least two electrodes part is determined the parameter of the electric capacity of expression first electrode respectively.
As is understood, the method that is used to operate according to the input equipment of first embodiment of the of the present invention first main aspect comprises the parameter of measuring the resistance between expression first and second electrodes, be used to survey the amount that acts on the force of compression on the active zone, and comprise the parameter of measuring the electric capacity of representing first electrode, be used to survey people or object near the there.Preferably, the parameter of measuring the electric capacity of expression first electrode comprises to first electrode and applies oscillating voltage and measure the electric current that flows into first electrode in response to the oscillating voltage that is applied.More preferably, the parameter of measuring the electric capacity of expression first electrode comprises to second electrode and applies oscillating voltage to have essentially identical phase place and amplitude to second electrode oscillating voltage that is applied and the oscillating voltage that is applied to first electrode.
Second embodiment of the of the present invention first main aspect relates to the equipment based on the pressure transducer of film with slightly different configuration.According to second embodiment of the of the present invention first main aspect, first carrier film has first electrode and second electrode that applies on it; Second carrier film has the third electrode that applies on it.First and second electrodes, make in response to the force of compression that acts on the active zone in the face of third electrode at active zone, first and second carrier films are pressed onto together and set up between first and second electrodes via third electrode to electrically contact.This input equipment also comprises the control circuit that can operate at least in first and second operator schemes, control circuit is configured to measure the parameter of the resistance between expression first and second electrodes in first operator scheme, be used to survey the amount that acts on the force of compression on the active zone, and be configured in second operator scheme to measure the parameter of the electric capacity one of at least of expression first, second and third electrode, be used to survey people or object near the there.Described first, second and third electrode preferably be appointed as one of at least for example first electrode, first and second electrodes or third electrode.
Input equipment according to second embodiment of the first main aspect of root invention can also comprise first module and second module, first module-specific is measured the parameter of expression resistance in first operator scheme, second module-specific is measured the parameter of expression electric capacity in second operator scheme.
First module can comprise for example current source and tension measuring circuit, current source may be operably coupled to first and second electrodes in first operator scheme, if electrically contact so that between first and second electrodes, set up via third electrode, then produce electric current by first and second electrodes, tension measuring circuit may be operably coupled to first and second electrodes in first operator scheme, be used to measure the voltage between them, this voltage is represented the resistance between first and second electrodes.Alternatively or additionally, first module can comprise voltage source and current measurement circuit, voltage source is operatively coupled on the first and second electrode places in first operator scheme, be used between them, producing voltage, current measurement circuit is operably connected in first operator scheme, be used to measure the electric current that flows through first and second electrodes, this electric current is represented the resistance between first and second electrodes.
Second module preferably includes AC voltage source and current measurement circuit, the AC voltage source in second operator scheme, may be operably coupled at least first, second and third electrode one of at least, be used for applying one of at least oscillating voltage to first, second and third electrode, current measurement circuit is operably connected in second operator scheme, be used to measure the electric current one of at least that flows into first, second and third electrode, the electric current one of at least that flows into first, second and third electrode is represented the electric capacity one of at least of first, second and third electrode.More preferably, this AC voltage source may be operably coupled to first, second and third electrode, to apply phase place and the essentially identical voltage of amplitude to first, second and third electrode in second operator scheme.
According to the input equipment of second embodiment of the of the present invention first main aspect, can also be included in the switch unit of control switching circuit between at least the first and second operator schemes.
Advantageously, first, second and third electrode comprise one of at least be arranged to active zone in corresponding another or corresponding other a plurality of presser sensor layers that become in the face of relation of first, second and third electrode.
Control circuit preferably is configured to export in response to first output signal of the parameter of expression expression resistance with in response to second output signal of the parameter of the electric capacity one of at least of expression first, second and third electrode.More preferably, control circuit comprises at least the first and second output terminals, and control circuit is configured to export first output signal and export second output signal at second output terminal at first output terminal.
In the input equipment as first embodiment aspect main, be formed integrally as usually according to the electrode in the input equipment of second embodiment of the of the present invention first main aspect according to of the present invention first.Yet, first, second and third electrode one of at least can be subdivided at least two electrode parts that electricity separates in second operator scheme at least.In the case, can determine the parameter of the electric capacity one of at least of expression first, second and third electrode respectively to each of described at least two electrodes part.
As will be appreciated, a kind of method that is used to operate according to the input equipment of second embodiment of the of the present invention first main aspect, comprise the parameter of measuring the resistance between expression first and second electrodes, be used to survey the amount that acts on the force of compression on the active zone, and comprise and the parameter of the electric capacity one of at least of measuring expression first, second and third electrode be used to survey people or object near the there.Preferably, the parameter of measuring the electric capacity one of at least of expression first, second and third electrode comprises one of at least applying oscillating voltage and measuring the described electric current one of at least that flows into first, second and third electrode in response to the oscillating voltage that is applied to first, second and third electrode.More preferably, the parameter of the described electric capacity one of at least of measuring expression first, second and third electrode comprises that described another or the other a plurality of electrode one of at least to first, second and third electrode applies oscillating voltage, and the oscillating voltage of described another or the other a plurality of electrodes one of at least that are applied to first, second and third electrode has identical phase place and amplitude with the described oscillating voltage one of at least that is applied to first, second and third electrode.
The 3rd embodiment according to the of the present invention first main aspect has proposed a kind of input equipment, comprises the position transducer based on film.Position transducer comprises first carrier film, second carrier film and sept, and sept is arranged in and is used between first and second carrier films the first and second carrier films a certain distance that separates each other, and comprises the opening of the active zone that defines position transducer.First carrier film has first and second electrodes that apply on it; Second carrier film has the third electrode that applies on it.First electrode comprises first conductor that a series of resistance connects.Third electrode in the face of first and second electrodes, makes in response to the force of compression that acts on the active zone in active zone, first and second carrier films is pressed onto together and sets up between the one or more of first conductor and second electrode via third electrode to electrically contact.Input equipment according to a fifth aspect of the invention also comprises the control circuit that can operate at least in first and second operator schemes, control circuit is configured to measure the parameter of the RC position between expression first electrode and second electrode in first operator scheme, be used to survey the position of compression force on active zone, and be configured in second operator scheme, measure the parameter of representing the capacity coupled position between first and second electrodes, be used to survey near the people of input equipment or the position of object.
In the input equipment of the 3rd embodiment aspect main according to of the present invention first, second electrode preferably includes second conductor that a series of conductions connect, and first and second conductor arrangement become mutually to intersect.
In order to obtain force of compression or the capacity coupled position in the bidimensional, can comprise a plurality of active zones that an opening or a plurality of opening by sept define based on the position transducer of film.First carrier film has first electrode and second electrode that applies on it in each active zone, and second carrier film has the third electrode that applies on it in each active zone.Each first electrode comprises first conductor that a series of resistance connect.Each third electrode is faced its corresponding first and second electrodes in corresponding active zone, make in response to the force of compression that acts on the active zone, first and second carrier films are pressed onto together, and third electrode provides electrically contacting between one or more and corresponding second electrode of first conductor of corresponding first electrode.In the case, control circuit can operate in the first and second operator schemes at least, and be configured in first operator scheme to measure the parameter of the RC two-dimensional position between described first electrode of expression and described second electrode, be used to survey the two-dimensional position of force of compression, and be configured in second operator scheme, measure the parameter of representing the capacity coupled position between described first electrode and described second electrode, be used to survey near the people of described input equipment or the position of object.
Include but not limited to keyboard, keypad, touch-screen, touch pad, computer mouse etc. with reference to above input equipment.Under the situation of the equipment with key, one or several keys can be related with each active zone of equipment.The detection of the position of force of compression (in one dimension or the two dimension) can be considered as being equal in the case determines which key activated.
Preferably, in of the present invention first the embodiment aspect main, pressure in the scope of the common pressure that applies in response to finger or contact pilotage by the people, the thickness of sept can significantly not change (promptly less than original depth 25% or more preferably less than 10%) meaning on, sept is incompressible substantially.
As will be appreciated, carrier film, sept, electrode and can be made by material transparent, translucent (semi-transparent or translucent) according to any other layer or the parts of the input equipment of the of the present invention first main aspect make that input equipment can be top back lighting and/or that be placed in display screen.
Forward the of the present invention second main aspect now to, input equipment comprises capacitive proximity and pressure transducer, it comprises first bearing bed, second bearing bed and sept, sept is arranged between first and second bearing beds, first bearing bed has first electrode that applies on it, second bearing bed has second electrode that applies on it, the first and second electrode relative spacing things are arranged to toward each other, make in response to the force of compression that acts on the pressure transducer, make first and second electrodes more together close.Input equipment also comprises be configured to the control circuit operated in comprising at least two operator schemes of first and second operator schemes.Control circuit is determined the parameter of the electric capacity between expression first electrode and its surround in second operator scheme time, and surround for example is an earthed surface, and determines the parameter of the electric capacity between expression first electrode and second electrode in first operator scheme time.It will be appreciated by those skilled in the art that the degree of approach of part (for example their finger) and first electrode of the health of the electric capacity expression user between first electrode and the ground itself.As previously mentioned, therefore second operator scheme can be considered as " degree of approach-sensing " pattern.On the other hand, the electric capacity between first and second electrodes is represented these distance between electrodes.Because given distance is corresponding to a certain amount of pressure or the amplitude of power, first operator scheme is considered as " pressure-sensing " (or " power-sensing ") pattern.
According to second embodiment of the of the present invention second main aspect, input equipment comprises capacitive proximity and pressure transducer, and it comprises first bearing bed, second bearing bed and is arranged in sept between first and second bearing beds.First bearing bed has a plurality of first electrodes that apply on it, and second bearing bed has a plurality of second electrodes that apply on it, each relative spacing thing of a plurality of first electrodes is arranged to relative with the corresponding electrode of a plurality of second electrodes, make in response to the force of compression that acts on the pressure transducer, make the correspondingly electrode of opposite of described first and second electrodes more together close.Also comprise according to the input equipment of second embodiment of the of the present invention second main aspect being configured to the control circuit operated at least in two operator schemes, at least two operator schemes comprise first and second operator schemes.Control circuit is determined the independent electrode (single electrode or electrode) in groups of a plurality of first electrodes of expression and the parameter of the electric capacity between the ground in first (degree of approach-sensing) operator scheme the time, and determines the independent electrode of a plurality of first electrodes of expression and the correspondingly parameter of the electric capacity between the electrode of opposite of a plurality of second electrodes in second (pressure-sensing) operator scheme the time.
According to the 3rd embodiment of the of the present invention second main aspect, input comprises capacitive proximity and pressure transducer, and it comprises first bearing bed, second bearing bed and is arranged in sept between described first and second bearing beds.First bearing bed has a plurality of first electrodes that apply on it, and first electrode is elongated on first direction, and second carrier film has a plurality of second electrodes that apply on it, and second electrode is elongated on second direction.First electrode is arranged to relative with a plurality of second electrodes by the relative spacing thing.According to present embodiment, the first elongated electrode laterally extends to the second elongated electrode, and (for example first and second directions form about 90 ° angle betwixt, the angle in 60 to 90 ° scope preferably), make in response to the force of compression of local action on pressure transducer, make the electrode of opposite of first and second electrodes more together close in the position of compression force on pressure transducer.Input equipment also comprises control circuit, it determines the independent electrode of a plurality of first electrodes of expression and the parameter of the electric capacity between the ground in second operator scheme time, and determines the parameter of the electric capacity between the independent electrode of the independent electrode of a plurality of first electrodes of expression and a plurality of second electrodes in first operator scheme time.
The 4th embodiment according to the of the present invention second main aspect, input equipment comprises capacitive proximity and pressure transducer, it comprises first bearing bed, second bearing bed and sept, and sept is arranged in and is used to make first and second bearing beds to be spaced apart from each other between first and second bearing beds.First bearing bed has a plurality of first electrodes that apply on it, second bearing bed has a plurality of second electrodes that apply on it, a plurality of first electrode relative spacing things are arranged to relative with second electrode, make that the independent electrode that makes first electrode is at more close second electrode in the position of compression force on pressure transducer in response to the force of compression of local action on pressure transducer.Input equipment according to the 4th embodiment of the of the present invention second main aspect, comprise control circuit, it determines the independent electrode of expression first electrode and the parameter of the electric capacity between the ground in second operator scheme time, and determines the parameter of the electric capacity between the independent electrode of expression second electrode and first electrode in first operator scheme time.
According to the distortion of the of the present invention second main aspect, sept be electrical isolation with compressible.According to this distortion, when compressing sept, make that the electrode of opposite of first and second electrodes is more together close in response to acting on the force of compression on the pressure transducer.Yet, preferably, pressure in the scope of the common pressure that applies in response to finger or contact pilotage, the thickness of sept by the people can significantly not change (promptly less than original depth 25% or more preferably less than 10%) meaning on, sept is incompressible substantially.
According to another advantageous version of the of the present invention second main aspect, sept has one or more openings betwixt, and single first electrode or a plurality of first electrode this aperture arrangement relatively become relative with single second electrode or a plurality of second electrode.First capacitance electrode and/or second electrode have insulation course or the insulating pattern of arranging on it, make to prevent short circuit between first capacitance electrode and second electrode.Insulation course or pattern can separate with sept or its part (under one situation of back, opening should be considered as depression rather than through hole).Sept can be compressible or incompressible.Under latter event, under effect, when one or two bearing bed bends in the opening of sept, make first and second electrodes more together close in force of compression.
If sept has a plurality of openings therein, if have a plurality of second electrodes that apply on it if first bearing bed has a plurality of first electrodes and second bearing bed that apply on it, the corresponding opening of a plurality of relatively openings of each of then a plurality of first electrodes preferably is arranged to relative with the corresponding electrode of a plurality of second electrodes.In the case, when compression force is on pressure transducer, make that the correspondingly electrode of opposite of first and second electrodes is more together close.
Input equipment according to the of the present invention second main aspect can comprise first module and second module, first module-specific is measured the parameter of the electric capacity between expression first and second electrodes in first operator scheme, second module-specific is measured the parameter of the electric capacity between expression first electrode and the ground in second operator scheme.These modules can be separated or comprise shared, promptly shared parts.
It will be understood by those skilled in the art that the parameter that exists multiple choices to be used for determining the electric capacity between expression first electrode and the ground.Can determine when for example, control circuit is in second operator scheme:
A. go up the amount of the electric charge of accumulation at first electrode (independent electrode) in response to the voltage that applies regulation to these (these) first electrode; Or
B. flow into the amplitude and/or the phase place of the load current of first electrode (independent electrode) in response to applying oscillating voltage to these (these) first electrode; Or
C. flow into in-phase component and/or 90 ° of phase shift component of the load current of first electrode (independent electrode) in response to applying oscillating voltage to these (these) first electrode; Or
D. the duration of charging and/or the discharge time of first electrode (independent electrode).
Similarly, exist multiple choices to be used for determining the parameter of the electric capacity between expression first electrode (independent electrode) and second electrode (independent electrode).Can determine when for example, control circuit is in first operator scheme:
A. go up the amount of the electric charge of accumulation at first electrode (independent electrode) and/or second electrode (independent electrode) in response to the voltage that applies regulation to electrode of opposite correspondingly;
B. go up the amount of the electric charge of accumulation at first electrode (independent electrode) and/or second electrode (independent electrode) in response to the voltage that applies regulation to this (these) electrode;
C. flow into the amplitude and/or the phase place of the load current of first electrode (independent electrode) in response to applying oscillating voltage to these (these) first electrode;
D. flow into the amplitude and/or the phase place of the load current of second electrode (independent electrode) in response to applying oscillating voltage to these (these) second electrode;
E. in response to applying oscillating voltage, one (a plurality of) to the second correspondingly relative electrode flow into the amplitude and/or the phase place of the load current of first electrode (independent electrode);
F. in response to applying oscillating voltage, one (a plurality of) to the first correspondingly relative electrode flow into the amplitude and/or the phase place of the load current of second electrode (independent electrode);
G. flow into in-phase component and/or 90 ° of phase shift component of the load current of first electrode (independent electrode) in response to applying oscillating voltage to these (these) first electrode;
H. flow into in-phase component and/or 90 ° of phase shift component of the load current of second electrode (independent electrode) in response to applying oscillating voltage to these (these) second electrode;
I. in response to applying oscillating voltage, one (a plurality of) to the second correspondingly relative electrode flow into in-phase component and/or 90 ° of phase shift component of the couple current of first electrode (independent electrode);
J. in response to applying oscillating voltage, one (a plurality of) to the first correspondingly relative electrode flow into in-phase component and/or 90 ° of phase shift component of the couple current of second electrode (independent electrode);
K. the duration of charging of first and/or second electrode and/or discharge time.
And in second operator scheme time, control circuit preferably applies first voltage and applies second voltage to second electrode to first electrode, and first and second voltages have identical amplitude and phase place.As will be appreciated, the electric field that this has eliminated between first and second electrodes substantially makes the electrode of winning become insensitive substantially on the direction of second electrode.
Include but not limited to keyboard, keypad, touch-screen, touch pad, computer mouse etc. with reference to above-mentioned input equipment.Under the situation of the equipment with key, one or several keys can be related with each active zone of equipment.Which key detection to the position (in one dimension or the two dimension) of force of compression can be considered as determining to have activated in the case.
As will be appreciated, carrier film, sept, electrode and can be made by transparent, translucent material according to any other layer of the input equipment of the of the present invention second main aspect or parts make that input equipment can be top back lighting and/or that be placed in display screen.
About two main aspects of the present invention, first bearing bed, sept and second bearing bed are preferably stacked together.
Description of drawings
From the following detailed description of several non-restrictive example of reference accompanying drawing, further details of the present invention and advantage will become obviously, and wherein, Fig. 1-14 relates to the of the present invention first main aspect, and Figure 15-25b relates to the of the present invention second main aspect:
Fig. 1 is the diagram according to the input equipment of first embodiment of the of the present invention first main aspect;
Fig. 2 is the diagram according to the input equipment of second embodiment of the of the present invention first main aspect;
Fig. 3 is the equivalent circuit diagram of module that is used to measure the parameter of expression electric capacity;
Fig. 4 is an example of measuring capacitance interference during the parameter of expression electric capacity;
Fig. 5 is the example of the example of the possible layout of first and second electrodes in the equipment of Fig. 2;
Fig. 6 is the example of another example of the possible layout of first and second electrodes in the equipment of Fig. 2;
Fig. 7 is the schematic cross-sectional view that can be used in according to the pressure transducer in the equipment of the 3rd embodiment of the of the present invention first main aspect;
Fig. 8 is to use the synoptic diagram of input equipment of the pressure transducer of Fig. 7;
Fig. 9 is an equivalent circuit diagram of determining the equipment of Fig. 8 during the capacity coupled position;
Figure 10 and 11 is the diagrams of circuit with input equipment of 2D position transducer;
Figure 12 and 13 is the diagrams of circuit with another input equipment of 2D position transducer;
Figure 14 is the synoptic diagram of the impedance of first electrode that changes as the function of the distance of actuated components;
Figure 15 is according to the capacitive pressure of first embodiment and the schematic cross-sectional view of proximity sensor;
Figure 16 is the schematic cross-sectional view according to the input equipment of second embodiment;
Figure 17 is the example of the different examples of electrical isolation pattern;
Figure 18 a and 18b are the viewgraph of cross-section that touches pad with keypad functions;
Figure 19 a and 19b are the alternative viewgraph of cross-section that touches pad with keypad functions;
Figure 20 a and 20b are the viewgraph of cross-section with another example that touches pad of keypad functions;
Figure 21 a-21c is the example of touching pad with keypad functions, and wherein key is arranged along a straight line;
Figure 22 a-22e is the example as the input equipment of linear slide block enforcement;
Figure 23 a-23d is the example as the input equipment of round slider enforcement;
Figure 24 a-24d is the example of distortion of touching the alternate embodiment of pad;
Figure 25 a-25b is the cross-sectional schematic view of another example of input equipment.
Embodiment
Fig. 1 shows the input equipment according to first embodiment of the of the present invention first main aspect.Equipment 10 comprises the pressure transducer 12 of the film type structure with active zone 14.Pressure transducer 12 comprises first and second carrier films 16,18, and described carrier film is by making such as for example electrically insulating material of the basic flexibility of PET, PEN, PI etc.Sept 20 is folded between first and second carrier films 16,18, thus carrier film is arranged to apart distance corresponding to sept thickness.Sept also can be made by the electrically insulating material of any basic flexibility.Sept is provided with the opening of the active zone 14 that defines pressure transducer 10.In active zone 14, the first carrying paper tinsel 16 carries first electrode 22 at it on interior side, and the second carrying paper tinsel 18 carries second electrode 24 at it on interior side.First electrode 22 comprise directly put on first carrying on the paper tinsel 16 conductive layer 26 and towards the presser sensor layer 28 of second electrode.Second electrode is by the conductive layer setting.Electrode preferably prints electrode.
First and second electrodes 22,24 are connected to control circuit 30 by lead-in wire 32 and 34.Control circuit 30 comprises first module 36 of the parameter that is used to measure the resistance between expression first and second electrodes 22,24, be used to measure expression first electrode electric capacity parameter second module 38 and be used for alternately first or second module being connected to the switch unit 40 of electrode 22,24.
First module 38 comprises current source 42, and its terminal can be connected to first and second electrodes respectively by switch unit 40.Reference resistance 44 and tension measuring circuit 46 are connected in parallel to current source 42.In the operation, promptly in first operator scheme, current source is attempted to produce predetermined electric current between its terminal.As long as electrode 22 and 24 is separated from each other, promptly ought act on force of compression deficiency on the pressure transducer and be enough in carrier film is pressed onto a time-out in active zone 14, because the very high input impedance of tension measuring circuit 46, electric current only can flow through reference resistance 44.Yet if electrode 22 contacts with 24, the all-in resistance that is connected in parallel to tension measuring circuit descends, and makes to keep the required voltage of predetermined electric current vertically to descend.In other words, the potential difference (PD) that is recorded by tension measuring circuit is represented the resistance between first and second electrodes 22,24.In response to measurement, first module is at first output terminal, 48 outputs, first signal.
Second module 38 that is exclusively used in " electric capacity " measurement comprises AC voltage source 50, oscillator signal is provided for first and second electrodes 22,24 by switch unit 40.Current measurement circuit 52 is measured the electric current that flows into first electrode.Therefore the magnitude of current that can flow into first electrode depends on by the electric capacity of first electrode and the formed capacitor of its surround also represents this electric capacity.Depend on measured electric current, second module is exported secondary signal on second output terminal 54 of control circuit.
Fig. 2 shows the input equipment according to second embodiment of the of the present invention first main aspect.Equipment 210 comprises the pressure transducer 212 of the film type structure with active zone 214.Pressure transducer 212 comprises first and second carrier films 216,218, and described carrier film is by making such as for example electrically insulating material of the basic flexibility of PET, PEN, PI etc.Sept 220 is folded between first and second carrier films 216,218, thus carrier film is arranged to apart distance corresponding to sept thickness.Sept also can be made by the electrically insulating material of any basic flexibility.Sept is provided with the opening of the active zone 214 that defines pressure transducer 210.In active zone 214, the first carrying paper tinsel 216 carries first electrode 222 and second electrode 224 at it on interior side, and the second carrying paper tinsel 218 carries third electrode 225 at it on interior side.First and second electrodes 222,224 are provided by the conductive layer that directly puts on the first carrying paper tinsel 216.Third electrode 225 comprises towards the presser sensor layer of first and second electrodes 222,224.Electrode preferably prints electrode.
Electrode 222,224,225 is connected to control circuit 230 by lead-in wire 232,234 and 235 respectively.Control circuit 230 comprises first module 236 of the parameter that is used to measure the resistance between expression first and second electrodes 222,224, be used to measure expression first and second electrodes 222,224 electric capacity parameter second module 238 and be used for alternately first or second module being connected to the switch unit 240 of electrode 222,224 and 225.
First module 238 comprises current source 242, and its terminal can be connected to first and second electrodes respectively by switch unit 240.Reference resistance 244 and tension measuring circuit 246 are connected in parallel to current source 242.In the operation, promptly in first operator scheme, current source 242 is attempted to produce predetermined electric current between its terminal.Be enough in carrier film is pressed onto together in active zone 214 as long as act on force of compression deficiency on the pressure transducer, because the very high input impedance of tension measuring circuit 246, electric current only can flow through reference resistance 244.Yet if carrier film is forced into together, first electrode 222 all contacts with third electrode 225 with second electrode 224.As a result, the all-in resistance that is connected in parallel to tension measuring circuit 246 descends, and makes to keep the required voltage of predetermined electric current vertically to descend.In other words, the potential difference (PD) that is recorded by tension measuring circuit 246 is represented the resistance between first and second electrodes 222,224.In response to measurement, first module 236 is exported first signal on first output terminal 248.
Second module 238 that is exclusively used in " electric capacity " measurement comprises AC voltage source 250, oscillator signal is provided for electrode 222,224 and 225 by switch unit 240.Current measurement circuit 252 (for example galvanometer) is measured the electric current that flows into first and second electrodes 222,224.Therefore the magnitude of current that can flow into these electrodes depends on by the electric capacity of first and second electrode and the formed capacitor of its surround also represents this electric capacity.Depend on measured electric current, second module 238 is exported secondary signal on second output terminal 254 of control circuit.
Input equipment can alternately be operated with the operator scheme related with resistance measurement with to measure related operator scheme with " electric capacity ".The duration that it will be understood by those skilled in the art that these measurement patterns can be identical or different.In addition, the frequency of different operation modes can be identical or different.For example, following situation is possible: input equipment only is measuring half of frequency of related operation mode with " electric capacity " with the frequency of the operation mode related with resistance measurement, or on the contrary.Other the operator scheme that can have input equipment, such as, for example error diagnosis pattern, wherein, input equipment is checked possible short circuit or circuit interruption.
Fig. 3 shows the alternate embodiment of the module of the parameter that can measure the resistance between expression first and second electrodes.Module 336 comprises the voltage source 343 that is connected in series with current measurement circuit 345.In first measurement pattern, voltage source applies potential difference (PD) between first and second electrodes.If set up and electrically contact (directly or via third electrode) between these, then the resistance between the electrode reduces, and according to Ohm law, the electric current that is recorded by current measurement circuit increases.Module 336 can be replaced by module 36 among Fig. 1 and the module 236 among Fig. 2.Those skilled in the art can know other circuit of the parameter that can measure expression resistance.
Fig. 4 schematically shows the capacitance interference during " electric capacity " is measured under as the situation of the input equipment among Fig. 2 210.Only show the electrode 222,224 and 225 of input equipment 210.During " electric capacity " is measured, measure the parameter of expression by first and second electrode 222,224 and their the formed electric capacity of surround.Routine as shown, essential consideration a plurality of (virtual) capacitor.For example, first and second electrodes and third electrode form capacitor.If the user with any part of health near input equipment, their finger 56 for example, then the electric capacity by first and second electrode 222,224 and their the formed capacitor of surround changes, and surveys this change by input equipment.Should be noted that then they keep essentially identical current potential during measuring if with the signal drive electrode 222,224 and 225 of same magnitude and phase place.As a result, by first and second electrodes, first and third electrode and second and the electric capacity of the capacitor that forms of third electrode keep substantially constant.Particularly, as when first and second electrodes are observed, third electrode occurs in change in the electric field behind the third electrode to first and second electrode screenings.
Fig. 5 and 6 shows two possible layouts of first and second electrodes 222 and 224.Among Fig. 5, two electrodes comprise plurality of conductors, and described conductor has first end of interconnection and second end freely, makes that it is the pectination profile substantially.It is parallel to each other substantially that conductor arrangement becomes, and the conductor of first electrode intersects mutually with the conductor of second electrode.In the embodiment of Fig. 6, electrode comprises some conducting ring parts of arranging with one heart.Begin at the central point of arranging, the conducting ring part alternately belongs to second and first electrode.Should be noted that and to use several other electrode lay-outs that the present invention is put into practice.
Fig. 7 shows the synoptic diagram based on the position transducer 712 of film according to the input equipment of the 3rd embodiment of the of the present invention first main aspect.Position transducer 712 comprises by sept 720 isolated first and second carrier films 716,718.Sept 720 is provided with the opening of the active zone 714 that defines position transducer 712.First carrier film 716 carries first electrode 722 and second electrode 724 on its inside surface; Second carrier film 718 carries third electrode 725 on its inside surface.First electrode 722 and second electrode 724 of third electrode 725 in the active zone 714.Second and third electrode be conductive electrode.Provided the top synoptic diagram of first and second electrodes among Fig. 8.First and second electrodes 722,724 all are pectination substantially.First electrode 722 comprises first conductor 758 that a series of resistance connect, and it is parallel to each other substantially that these conductor arrangement become.The resistance of first conductor 758 connects to be provided by resistive band 760.Second electrode 724 comprises the conductor 762 that a series of conductions connect, and these conductors intersect mutually with the conductor of first electrode 722.Third electrode 725 does not connect.
If the force of compression local action is to the sensor of position, then first and second carrier films 716,716 are forced into together, and set up between the one or more conductors 758 and second electrode 724 via third electrode 725 and to electrically contact.Terminal 764 by measuring first electrode 722 and one of 766 and second electrode 724 between resistance, can find out the contacted position of first and second electrodes, thereby and find out pressure and act on place on the sensor.More generally, can measure any parameter of the resistance between one of expression terminal 764 and 766 and second electrode 724, to obtain this information.In the input equipment of schematically describing in Fig. 8, this realization is that the voltage source 743 of control circuit 730 applies the DC potential difference (PD) between the terminal 764 and 766 of first electrode 722.So tension measuring circuit 746 is measured the voltage on second electrode, it depends on the position of the contact point between electrode 722,724 and 725.
Input equipment 710 also can operate in " electric capacity " detection mode.So the alternating-current voltage source 750 of control circuit 730 applies oscillating potential difference between the terminal 764 and 766 of first electrode 722.The oscillating voltage that measures at tension measuring circuit 746, and it represents the capacity coupled position between first and second electrodes 722 and 725.Provided the equivalent circuit diagram of describing this situation among Fig. 9.Capacitive coupling between first and second electrodes 722 and 724 is exemplified as impedance Z z.The tie point 757 of impedance Z z to the first electrode is corresponding to the highest point of capacitive coupling, the highest for example approaching owing to user's hand and finger of capacitive coupling.Because the very high impedance of tension measuring circuit 746 is by the voltage U of tension measuring circuit detection 0Be approximately U 0≈ U ApplyZ X '/ (Z x+ Z X '), U wherein ApplyBe the voltage that applies by alternating-current voltage source 750.Because the resulting impedance Z of first electrode x+ Z X 'Be known, so this expression formula is directly as measured voltage U 0Function produce Z X '(thereby and producing capacity coupled position).
Control circuit 730 comprises be used for the switch unit 740 that switches between electric capacity detection mode and resistance detection mode.Among Fig. 8, tension measuring circuit is shown and is common to two kinds of operator schemes.Yet control circuit 730 can comprise the tension measuring circuit that separates of other operator scheme of branch that is exclusively used in circuit.
Figure 10 and 11 schematically example comprise the input equipment 1010 of a plurality of position transducers 712 that are arranged in parallel.Force of compression or capacity coupled position that input equipment 1010 is surveyed on the bidimensional.First electrode 722 of position transducer 712 connects between two common terminals 1064 and 1066.Second electrode 724 is by means of the resistive band between terminal 1065 and 1,067 1061 resistive interconnections in series.
Among Figure 10 example measurement force of compression or capacity coupled y position.Between terminal 1065 and 1067, apply voltage, and the voltage U that measures at terminal 1066 (or at terminal 1064) 0y(be used to find out the y position of force of compression) under the situation of resistance measurement, the voltage that applies is preferably dc voltage, and (is used to find out capacity coupled y position) under the situation of capacitance measurement, and the voltage that applies is preferably AC voltage.Among Figure 11 example measurement force of compression or capacity coupled x position.Between terminal 1064 and 1066, apply voltage, and the voltage U that measures at terminal 1067 (or at terminal 1065) 0x(be used to find out the x position of force of compression) under the situation of resistance measurement, the voltage that applies is preferably dc voltage, and (is used to find out capacity coupled x position) under the situation of capacitance measurement, and the voltage that applies is preferably AC voltage.
Figure 12 and 13 examples the distortion of the input equipment described among Figure 10 and 11.In input equipment 1210, the layout of position transducer 712 is different from the layout of previous discussion.First electrode 1222 comprises first conductor 1258 of a series of resistive interconnections respectively.With different among the previous embodiment, not by continuous resistive band, but resistive interconnections is set by the resistor 1260 that separates.Second electrode comprises a series of second conductors 1262 of conductive interconnection respectively.First and second conductors are projected in the active zone of position transducer, and form cross one another configuration therein.First electrode 1222 connects between two common terminals 1264 and 1266.Second electrode 1224 is by means of the resistor 1261 that separates resistive interconnections in series between terminal 1265 and 1267.
Among Figure 12 example measurement force of compression or capacity coupled y position.Between terminal 1265 and 1267, apply voltage, and the voltage U that measures at terminal 1266 (or at terminal 1264) 0y(be used to find out the y position of force of compression) under the situation of resistance measurement, the voltage that applies is preferably dc voltage, and (is used to find out capacity coupled y position) under the situation of capacitance measurement, and the voltage that applies is preferably AC voltage.Among Figure 13 example measurement force of compression or capacity coupled x position.Between terminal 1264 and 1266, apply voltage, and the voltage U that measures at terminal 1267 (or at terminal 1265) 0x(be used to find out the x position of force of compression) under the situation of resistance measurement, the voltage that applies is preferably dc voltage, and (is used to find out capacity coupled x position) under the situation of capacitance measurement, and the voltage that applies is preferably AC voltage.
Figure 14 schematically example the impedance between first electrode and the ground as the function of actuated components (for example user's finger, hand or any other body part) apart from the distance of input equipment.The purpose of Xie Shiing supposes that utilization has the voltage of fixed frequency to drive first electrode for this reason.In Figure 14, distance reduces from left to right along transverse axis.If actuated components is away from equipment, its impedance maximum.Along with actuated components near (this moment contact) with equipment, the electric capacity between electrode and the ground increases, and makes the impedance reduction.Along with actuated components becomes even nearer, it is pressed onto on the equipment gradually, makes first and second electrodes contact thus.Electric capacity keeps constant substantially now, but the resistance between first and second electrodes reduces with the increased pressure on the sensor now.As a result, impedance reduces towards minimum value.Should be noted that when actuated components will contact with carrier film equipment advantageously switches to resistance detection mode (first operator scheme) from electric capacity detection mode (second operator scheme).
Figure 15 shows the data input device 10 ' according to the of the present invention second main aspect, comprises the capacitive proximity and the pressure transducer 12 ' of film type structure.Capacitive proximity and pressure transducer 12 ' comprise first and second bearing beds of first and second carrier films 16 ', 18 ' form, and described carrier film is by making such as for example electrically insulating material of the basic flexibility of PET, PEN, PI etc.Sept 20 ' is folded between first and second carrier films 16 ', 18 ', makes them remain apart.Sept 20 ' also can be made by the electrically insulating material of basic flexibility, for example double faced adhesive tape.Sept 20 ' is provided with the opening 14 ' of the active zone that defines pressure transducer 10 ' therein.In active zone 14 ', the first carrying paper tinsel 16 ' points to carrying first electrode for capacitors 22 ' on the side of second carrier film 18 ' at it, and the second carrying paper tinsel 18 ' points to carrying second electrode for capacitors 24 ' on the side of first carrier film 16 ' at it.First and second electrode for capacitors 22 ', 24 ' are formed by the conductive material (for example silver China ink) that directly is applied to respectively on first and second carrier films 16 ', 18 '.Second electrode for capacitors forms the layer 26 ' of electrically insulating material (dielectric, for example PET, PEN, PI etc.) thereon.
The right-hand side of Figure 15 shows by lead-in wire 30 ', 32 ' and is connected to first and second electrode for capacitors 22 ', 24 ' control circuit 28 '.Control circuit 28 ' comprises microprocessor, special IC (ASIC) or programmable chip, is configured to operate in first and second operator schemes at least.When second operator scheme, control circuit is determined the parameter of the electric capacity between expression first electrode for capacitors and the ground, and when first operator scheme, control circuit is determined the parameter of the electric capacity between expression first electrode for capacitors and second electrode for capacitors.
Second operator scheme and sensing want the degree of approach of object of sensing related, and the object of sensing for example is user's a finger 34 '.In second operator scheme, control circuit remains on identical current potential substantially with first and second electrodes, makes to have eliminated electric field substantially between first and second electrodes.Thereby second electrode 24 ' shields with the driving that acts on first electrode 22 ', and the latter's susceptibility is directed away from second electrode 24 '.If oscillating voltage is put on first electrode for capacitors, then set up to the oscillating electric field on ground.Want the object of sensing to change electric capacity between first electrode for capacitors and the ground, it is by control circuit 28 ' sensing.Should be noted that in second operator scheme degree of approach of surveying object does not need object touching or the contact degree of approach and pressure transducer 12 '.
First operator scheme is related by the pressure that certain detent puts on the sensor with sensing, and detent is such as the finger or the contact pilotage that for example are the user.In first operator scheme, control circuit is determined the electric capacity of the capacitor that formed by first and second electrode for capacitors 22 ', 24 ' basically.The electric capacity of capacitor depends on that its distance between electrodes is known.Under the situation of example, the distance between first and second electrode for capacitors is with put on increasing and reducing of pressure on the pressure transducer by the user.As a result, the electric capacity between the electrode for capacitors increases, and it is surveyed by control circuit 28 '.
Figure 16 shows the degree of approach of Figure 15 and the distortion of pressure transducer.Its structure is identical, except that first electrode for capacitors 22 ' and second electrode for capacitors 24 ' form the electrical insulation material layer 26 ' like that thereon.These it will be understood by those skilled in the art that electrically insulating material 26 ' of patterning allows the response of cutting out the degree of approach and pressure transducer in first operator scheme.As long as electrically insulating material is spaced apart from each other (promptly be used for applied by the user low-pressure), then pattern has no significant effect sensor.Yet along with increased pressure, electric insulation layer obtains contact and forms surface of contact.Insulation layer patterned causes the minor increment between first and second electrodes to change on surface of contact.Therefore, electric capacity increases the situation that is different from the insulation course unanimity.The example of insulation layer patterned has been shown among Figure 17.
Among Figure 18 a-18b, given the reference number identical for the element of the element that is similar to Figure 15, be added with prefix " 4 " in front with the counter element of Figure 15 and 16.
Figure 18 a and 18b show the xsect that touches pad 412 ' with keypad functions.Touch the stepped construction that pad 412 ' comprises first carrier film 416 ', second carrier film 418 ' and sept 420 ', sept 420 ' is folded between first and second carrier films, makes they are separated.Sept 420 ' has the layout of the similar matrix of opening 414 ' therein, and its regulation is touched the key of pad 412 '.First electrode for capacitors 422 ' that will be arranged on first and second carrier films 416 ', 418 ' is related with each key with second electrode for capacitors 424 '.The opening 414 ' of the association of relative spacing thing 420 ', each first electrode for capacitors 422 ' is arranged as relative with its second electrode for capacitors homologue 424 '.Touch pad 412 ' and comprise that also control circuit is (not shown, for the purpose of drawings clear), it determines the independent electrode of expression first electrode for capacitors 422 ' and the parameter of the electric capacity between the ground in second operator scheme, and determines the parameter of the electric capacity between the electrode of association of the independent electrode of expression first electrode for capacitors 422 ' and second electrode for capacitors 424 ' in first operator scheme.
In Figure 18 a, user's finger 434 ' is touched first carrier film 416 ' gently.Institute's applied pressure is not enough to cause the remarkable bending of first carrier film 416 ' in the zone of key.Survey the position of user's finger 434 ' by each electrode of electrode for capacitors 422 ' being determined the capacity coupled parameter between this electrode 422 ' of expression and the ground.Can be for example calculate as the barycenter of the position of first electrode for capacitors 422 ' position, and the parameter that is utilized corresponding expression electric capacity is weighted.For example utilize (for example on the display at utensil) when touching pad 412 ' and controlling cursor as the user, second operator scheme is fit to.
In Figure 18 b, the user depresses first carrier film 416 ', makes it bend in the opening 414 ' of sept 420 ', and the distance between corresponding first and second electrode for capacitors 422 ', 424 ' reduces.This makes the electric capacity between these electrode for capacitors rise, and this can be detected in first operator scheme of touching pad 412 '.First operator scheme is therefore related with the actuating of the key that touches pad 412 ', and actuating for example is finger 434 ' or the contact pilotage by the user.
In the operation, first and second operator schemes are alternately carried out, and promptly touch pad 412 ' and more or less switch to first pattern from second operator scheme periodically, and on the contrary.Should be noted that in first operator scheme, touch the parameter that pad does not need each key is determined expression electric capacity.In fact, when touching pad 412 ' when operating in second operator scheme, if only determine the latter at this key or those keys in the adjacent domain of the position of the finger 434 ' that detects the user, then it is considered to favourable.
Figure 19 a and 19b show the alternative xsect that touches pad 512 ' with keypad functions.Touch pad and 512 ' comprise first carrier film 516 ', second carrier film 518 ' and sept 521 ', sept is folded between first and second carrier films 516 ', 518 ', makes they are separated.Sept 521 ' is made by the compressible foamed material of electrical isolation, for example isocyanurate foam etc.First and second carrier films 516 ', 518 ' have the lip-deep electrode for capacitors 522 ', 524 ' that puts on towards sept 521 '.Each first electrode for capacitors 522 ' is arranged on first carrier film, and is with respect to sept 521 ', relative with second electrode for capacitors 524 ' on second carrier film.Every pair of relative first and second electrode for capacitors regulation is touched the key of pad 512 '.The latter also comprises the control circuit (not shown), it determines the independent electrode of expression first electrode for capacitors 522 ' and the parameter of the electric capacity between the ground in second operator scheme, and determines the parameter of the electric capacity between the electrode of association of the independent electrode of expression first electrode for capacitors 522 ' and second electrode for capacitors 524 ' in first operator scheme.
In Figure 19 a, user's finger 534 ' is touched first carrier film 516 ' gently.Institute's applied pressure is not enough to cause the remarkable bending of first carrier film 516 ' in the zone of key.Survey the position of user's finger 534 ' by each electrode of first electrode for capacitors 522 ' being determined the capacity coupled parameter between this electrode 522 ' of expression and the ground.In previous example, can be for example calculate as the barycenter of the position of first electrode for capacitors 522 ' position, and the parameter that is utilized corresponding expression electric capacity is weighted.For example utilize (for example on the display at utensil) when touching pad 512 ' and controlling cursor as the user, second operator scheme is fit to.
In Figure 19 b, the user is pressed on first carrier film 516 ', makes the sept 521 ' of compression under it, reduce thus first and second electrode for capacitors 522 ', 524 ' between distance.This makes the electric capacity between these electrode for capacitors rise, and this can be detected in first operator scheme of touching pad 512 '.First operator scheme is therefore related with the actuating of the key that touches pad 512 ', and actuating for example is finger 534 ' or the contact pilotage by the user.
The class of operation of touching pad 512 ' is similar to previous example: first and second operator schemes are alternately carried out, and promptly touch pad 512 ' and more or less switch to first pattern from second operator scheme periodically, and on the contrary.In first operator scheme, when touching pad 512 ' when operating in second operator scheme, if only determine the parameter of the electric capacity between expression first and second electrode for capacitors 522 ', 524 ' at this key in the adjacent domain of the position of the finger 534 ' that detects the user or those keys, then it is considered to favourable.
Figure 20 a and 20b example also are possible at the single embodiment that touches the previous example of combination in the pad.Touch pad and 612 ' comprise first carrier film 616 ', second carrier film 618 ' and first sept 620 ', sept 620 ' is folded between first and second carrier films 616 ', 618 ', makes they are separated.Sept 620 ' has the layout of the similar matrix of opening 614 ' therein, and its regulation is touched the key of pad 612 '.To be arranged in first electrode for capacitors 622 ' on first and second carrier films 616 ', 618 ' and second electrode for capacitors 624 ' to related with each key.The opening 614 ' of the association of relative spacing thing 620 ', each first electrode for capacitors 622 ' is arranged as relative with its second electrode for capacitors homologue 624 '.In the opening in the sept 620 ' some (middle key among Figure 20 a and the 20b) are filled with the compressible foamed material of electrical isolation, for example isocyanurate foam etc.In this example, sept 620 ' is made than the low flexible material of foamed material 621 ' substantially by compressibility.Tactile properties with key of foamed material 621 ' is different from the tactile properties of those keys that do not have foamed material.Similarly, their the electric capacity performance as the function of pressure is different.Yet the class of operation of touching pad 621 ' is similar to the operation of touching pad 412 ' and 512 '.
Figure 21 a-21c show have keypad functions touch the pad 712 ', wherein key is along straight line (curve also is feasible) layout.Figure 21 a shows the layout of key, and Figure 21 b and 21c show the viewgraph of cross-section that touches pad 712 '.Touch the stepped construction that pad 712 ' comprises first carrier film 716 ', second carrier film 718 ' and sept 720 ', sept 720 ' is folded between first and second carrier films 716 ', 718 ', makes they are separated.Sept 720 ' has opening 714 ' therein, and opening is arranged along a straight line and stipulates to touch pad 712 ' key.First electrode for capacitors 722 ' that will be arranged on first carrier film 716 ' is related with each key.The second shared electrode for capacitors 724 ' extends on all keys that touch pad 712 '.Touch pad 712 ' and also comprise the control circuit (not shown), it determines the independent electrode of expression first electrode for capacitors 722 ' and the parameter of the electric capacity between the ground in second operator scheme, and determines the independent electrode of expression first electrode for capacitors 722 ' and the parameter of the electric capacity between the common electrode 724 ' in first operator scheme.
In Figure 21 b, user's finger 734 ' is touched first carrier film 716 ' gently.Applied force is not enough to cause the remarkable bending of first carrier film 716 ' in the zone of key.Survey the user and point 734 ' position by each electrode of first electrode for capacitors 722 ' being determined capacity coupled parameter between this electrode 722 ' of expression and the ground.Can be for example calculate as the barycenter of the position of first electrode for capacitors 722 ' position, and the parameter that is utilized corresponding expression electric capacity is weighted.For example utilize (for example on the display at utensil) when touching pad 712 ' and controlling cursor as the user, second operator scheme is fit to.
In Figure 21 c, the user depresses first carrier film 716 ', makes it bend in the opening 714 ' of sept 720 ', and the distance between the first corresponding electrode 722 ' and second electrode for capacitors 724 ' reduces.This makes the electric capacity between these electrode for capacitors rise, and this can be detected in first operator scheme of touching pad 712 '.First operator scheme is therefore related with the actuating of the key that touches pad 712 ', and actuating for example is finger 734 ' or the contact pilotage by the user.
In the operation, first and second operator schemes are alternately carried out, and promptly touch pad 712 ' and more or less switch to first pattern from second operator scheme periodically, and on the contrary.Should be noted that in first operator scheme, touch the parameter that pad does not need each key is determined expression electric capacity.In fact, when touching pad 712 ' when operating in second operator scheme, if only determine the latter at this key or those keys in the adjacent domain of the position of the finger 734 ' that detects the user, then it is considered to favourable.
Figure 22 a-22c shows the possible layout of slide block 812 ', and Figure 22 d and 22e show its viewgraph of cross-section.Slide block 812 ' comprises the stepped construction of first carrier film 816 ', second carrier film 818 ' and sept 820 ', and sept 620 ' is folded between first and second carrier films, makes they are separated.Sept 820 ' has opening 814 ' therein, and it extends (the curve process also is possible, with reference to Figure 23 a-23d) along straight line in the case.The active zone of opening 814 ' regulation slide block 812 '.First carrier film 816 ' has to be arranged that first electrode for capacitors in active zone on it, second carrier film have and applies shared second electrode for capacitors 824 ' in active zone on it.First electrode for capacitors 822 ' is arranged to become in the face of relation with second electrode for capacitors 824 '.Second capacitor electrode has the thin dielectric layer of arranging on it 826 ', it prevents by acting on force of compression on the slide block 812 ' when making win electrode for capacitors 822 ' and second electrode for capacitors 824 ' more close each other, short circuit between first electrode for capacitors 822 ' and second electrode for capacitors 824 '.
In Figure 22 d, user's finger 834 ' is touched first carrier film 816 ' gently.Applied force is not enough to cause the remarkable bending of first carrier film 816 ' in the zone of active zone.Yet in Figure 22 e, the user depresses first carrier film 816 ', make its local bending in the opening 814 ' of sept 820 ', and the distance between first electrode 822 ' and second electrode for capacitors 824 ' reduces at the some place that applies power.
In the slide block of Figure 22 a and 22b, first electrode for capacitors 822 ' is connected to the control circuit (not shown) respectively.Therefore, these slide blocks can be surveyed the position (in first and second operator schemes) of user's finger 834 '.In second operator scheme, control circuit is to each definite this electrode 822 ' of expression of first electrode for capacitors 822 ' and the capacity coupled parameter between the ground.Can be for example calculate as the barycenter of the position of first electrode for capacitors 822 ' described position, and the parameter that is utilized corresponding expression electric capacity is weighted.In first operator scheme, can survey the independent electrode of expression first electrode for capacitors 822 ' and the parameter of the electric capacity between shared second electrode for capacitors 824 '.As seeing, the class of operation of the slide block 812 ' as shown in Figure 22 a and 22b is similar to the operation of keypad 712 '.
In the slide block of Figure 22 c, first electrode for capacitors is not to be connected to control circuit respectively.On the contrary, there be three group of first electrode for capacitors 822 '.Every group first electrode for capacitors 822 ' is a conductive interconnection.Along active zone, an electrode for capacitors of second group is followed an electrode for capacitors of first group, and in turn, an electrode for capacitors of the 3rd group is followed an electrode for capacitors of second group, thereafter, this series is restarted with first group first electrode for capacitors.Slide block as shown in Figure 22 c can not be surveyed (definitely) position of user's finger 834 ' or contact pilotage.Yet this slide block can be surveyed mobile (in two operator schemes) of user's finger 834 ' or contact pilotage.In second operator scheme, when user's finger 834 ' when moving left to the right side, the series to the group of capacity coupled first electrode for capacitors on ground with raising is 2-3-1 ' (and continuing circularly).When user's finger 834 ' when being shifted to the right to a left side, the series to the group of capacity coupled first electrode for capacitors on ground with raising is 3-2-1 ' (and continuing circularly).In first operator scheme, can determine moving direction from series to the group of capacity coupled first electrode for capacitors of second electrode for capacitors with raising.Certainly, in first operator scheme, also can survey the amount that is applied to the power on the slide block.For example, if the parameter of expression electric capacity surpasses predetermined threshold, then can trigger a certain change action.
The quantity of the given aerial lug that reduces, if needn't know the absolute position, then the slide block of Figure 22 c is especially interesting, for example for by based on the navigation of the menu of tabulation (rolling by the item tabulation that shows and options are to enter submenu or to begin certain function).The user so that represent the parameter of the electric capacity between first and second electrode for capacitors surpass predetermined threshold defeat on slide block the time, for example can take place from the action of tabulation options.
Figure 23 a-23d shows ring slider 912 '.The slide block of Figure 23 a and 23b is configured to detecting location (slide block with keypad functions); Those of Figure 23 c and 23d are similar to the linear slide block of Figure 22 c.
Figure 24 a-24c schematically shows top view, and Figure 24 d shows the schematic cross-sectional view of the distortion of the alternate embodiment of touching pad 1012 '.Touch pad 1012 ' and have a plurality of first elongated electrode for capacitors 1022 ' and a plurality of second elongated electrode for capacitors 1024 ' that put on second carrier film 1018 ' that put on first carrier film 1016 '.Opening 1014 ', the first electrode for capacitors 1022 ' in the relative spacing thing 1020 ' is arranged to relative with second electrode for capacitors, and sept is folded between the carrier film 1016 ', 1018 '.First electrode for capacitors 1022 ' extends to second electrode for capacitors 1024 ' clockwise.In an illustrated embodiment, the angle between any one first electrode for capacitors and any one second electrode for capacitors is 90 °; Yet, should be noted that this angle also can be different from 90 °, for example between 30 ° and 90 °.Second electrode for capacitors 1024 ' is coated with thin dielectric layer, it prevents from touching the position of filling up on 1012 ' in compression force, make when first and second electrode for capacitors 1022 ', 1024 ' are more close first and second electrode for capacitors 1022 ', 1024 ' short circuit.Touch pad 1012 ' and be connected to the control circuit (not shown), it determines the independent electrode of expression first electrode for capacitors 1022 ' and the parameter of the electric capacity between the ground in second operator scheme, and determines the parameter of the electric capacity between the independent electrode of the independent electrode of expression first electrode for capacitors 1022 ' and second electrode for capacitors 1024 ' in first operator scheme.
Touching in the pad of Figure 24 a and 24b, electrode for capacitors 1022 ' and 1024 ' is connected to the control circuit (not shown) respectively.Therefore, these touch pad and can survey the position of user's finger 1034 ' (in second operator scheme at one dimension, and in first operator scheme at two dimension).In second operator scheme, control circuit is to each definite this electrode 1022 ' of expression of first electrode for capacitors 1022 ' and the capacity coupled parameter between the ground.Can be for example calculate as the barycenter of the position of first electrode for capacitors 1022 ' position, and the parameter that is utilized corresponding expression electric capacity is weighted.Should be noted that in second operator scheme, on the direction of the direction of extending, survey the position of user's finger 1034 ' perpendicular to first electrode for capacitors.In first operator scheme, control circuit is determined the parameter of the electric capacity between each of this electrode 1022 ' of expression and second electrode for capacitors 1024 ' to each of first electrode for capacitors 1022 '.Obtain the position (applying the point of power) of users' finger from those first and second electrodes, those first and second electrodes have shown maximum capacitive coupling.
In Figure 24 c, first and second electrode for capacitors 1022 ' and 1024 ' are not to be connected to control circuit respectively.On the contrary, there are three group of first electrode for capacitors 1022 ' and three group of second electrode for capacitors 1024 '.Every group electrode for capacitors conductive interconnection.Along direction perpendicular to first electrode for capacitors, an electrode for capacitors of second group is followed first group first electrode for capacitors, in turn, an electrode for capacitors of the 3rd group is followed this electrode for capacitors of second group, thereafter, serial first electrode for capacitors with first group restarts.Second electrode for capacitors is arranged similarly.As shown in Figure 24 c, touch (definitely) position that pad can not be surveyed user's finger 1034 ' or contact pilotage.Yet this touches pad can survey user's finger 1034 ' or moving of contact pilotage.In second operator scheme, when user's finger 1034 ' moves perpendicular to first electrode for capacitors, the series of group to capacity coupled first electrode for capacitors on ground with raising is 2-3-1 ' (and continuing circularly) or 3-2-1 ' (and continuing circularly), depends on moving direction.In first operator scheme, can determine the direction that moves from series to the group of capacity coupled first electrode for capacitors of second electrode for capacitors with raising perpendicular to first electrode for capacitors.Similarly, can determine the direction that moves from series to the group of capacity coupled second electrode for capacitors of first electrode for capacitors with raising perpendicular to second electrode for capacitors.Certainly, in first operator scheme, also can survey the amount of touching the power on the pad that is applied to.For example, if the parameter of expression electric capacity surpasses predetermined threshold, then can trigger a certain change action.
Figure 25 a and 25b show another alternate embodiment of the input equipment that comprises the degree of approach and pressure transducer 1112 '.Capacitive proximity and pressure transducer 1112 ' comprise first bearing bed of lid 1116 ' form of substantially rigid and second bearing bed of substrate 1118 ' form.The lid 1116 ' of rigidity comprises a plurality of component layer, such as duroplasts 1116 ' a, double faced adhesive tape 1116 ' b and the flexible thermoplastic film 1116 ' c of protection.Pivot 1123 ' is folded between first and second bearing beds 1116 ', 1118 '.Capacitive proximity comprises relative pivot 1123 ' with pressure transducer 1112 ', and radially electrode of opposite is right.Each electrode pair comprises that being arranged in first bearing bed 1116 ' goes up first electrode for capacitors 1122 ' of (on the side of pointing to second bearing bed 1118 ') and go up second electrode for capacitors 1124 ' of (pointing on the side of first bearing bed 1116 ') at second bearing bed 1118 '.First and second electrode for capacitors 1122 ', 1124 ' are formed by the conductive material (for example silver China ink) that directly puts on respectively on first and second bearing beds.The sept of being made by the electrical isolation foamed material 1121 ' is arranged between the first and second right electrode for capacitors.
First and second electrode for capacitors 1122 ', 1124 ' are connected to the control circuit (not shown).In the time of in second operator scheme, control circuit is determined the parameter of the electric capacity between expression first electrode for capacitors and the ground, and in first operator scheme time, control circuit is determined the parameter of each first right electrode for capacitors of expression and the electric capacity between second electrode for capacitors.
Second operator scheme and sensing want the degree of approach of object of sensing related, and the object of sensing for example is user's a finger 1134 '.In second operator scheme, control circuit remains on identical current potential substantially with first and second electrodes, makes that electric field is eliminated substantially between first and second electrodes.Thereby second electrode 1124 ' shields with the driving that acts on each first electrode 1122 ', and the latter's susceptibility is directed away from each second electrode 1124 '.If oscillating voltage is put on first electrode for capacitors, then set up to the oscillating electric field on ground.Want the object of sensing to change electric capacity between first electrode for capacitors and the ground, it is by control circuit 1128 ' sensing.
First operator scheme is related by the pressure that certain detent puts on the sensor with sensing, and detent is such as the finger 1134 ' or the contact pilotage that for example are the user.In first operator scheme, control circuit is determined the electric capacity of the capacitor that formed by first and second electrode for capacitors 1122 ', 1124 ' basically.In the embodiment of Figure 25 a and 25b, the pressure that is applied on the degree of approach and the pressure transducer 1112 ' by the user tilts the bearing bed of winning, first pair first and second electrode for capacitors become more close (right-hand side among Figure 25 b) together thus, and second pair those be moved away from each other (left-hand sides among Figure 25 b).When the user stopped to be pressed on the sensor, foam spacer 1121 ' made the bearing bed of winning get back to the centre position.

Claims (39)

1, a kind of input equipment comprises:
Pressure transducer based on film, described pressure transducer comprises first carrier film, second carrier film and be arranged in sept between described first and second carrier films, described pressure transducer also comprises arrangement of electrodes, described arrangement of electrodes comprises at least the first electrode and second electrode, described arrangement of electrodes is arranged between described first and second carrier films, make when compression force is on described pressure transducer, make described first and second carrier films more together close, and the situation of measurable first electric parameter between described first and second electrodes when not having force of compression to put on the described pressure transducer change;
And control circuit, be connected to described first and second electrodes, be configured at least the first and second operator schemes, operate, described control circuit,
In the time of in described first operator scheme, determine described first electric parameter between described first and second electrodes, described first electric parameter represents to act on the force of compression on the described pressure transducer;
And, in the time of in described second operator scheme, determine second electric parameter of the electric capacity of described first electrode of expression.
2, input equipment as claimed in claim 1, wherein, described sept has the opening of the active zone that defines described pressure transducer,
Wherein, described arrangement of electrodes is arranged in the described active zone, and make when compression force is on described pressure transducer, to make described first and second carrier films more together close in described active zone, and between described first and second electrodes, set up and electrically contact,
And wherein, described first electric parameter is represented the resistance between described first and second electrodes.
3, input equipment as claimed in claim 2, wherein, described first electric parameter comprises the voltage between described first and second electrodes, and wherein, described control circuit comprises first module that is exclusively used in described first operator scheme, described first module comprises current source and tension measuring circuit, described current source may be operably coupled to described first and second electrodes in described first operator scheme, so that between described first and second electrodes, set up when electrically contacting, produce electric current by described first and second electrodes, described tension measuring circuit may be operably coupled to described first and second electrodes in described first operator scheme, be used to measure the described voltage between them.
4, input equipment as claimed in claim 2, wherein, described first electric parameter comprises the electric current between described first and second electrodes, and wherein, described control circuit comprises first module that is exclusively used in described first operator scheme, described first module comprises voltage source and current measurement circuit, described voltage source may be operably coupled to described first and second electrodes in described first operator scheme, be used between them, producing voltage, described current measurement circuit is operably connected in described first operator scheme, is used to measure described electric current.
5, each described input equipment according to claim 1 to 4, comprise second module that is exclusively used in described second operator scheme, described second module comprises AC voltage source and current measurement circuit, described AC voltage source may be operably coupled to described at least first electrode in described second operator scheme, be used for applying oscillating voltage to described first electrode, described current measurement circuit is operably connected in described second operator scheme, be used to measure the electric current that flows into described first electrode, flow into described second electric parameter of the described electric current of described first electrode for the electric capacity of described first electrode of expression.
6, input equipment as claimed in claim 5, wherein, described AC voltage source may be operably coupled to described first and second electrodes, so that apply phase place and the essentially identical voltage of amplitude to described first and second electrodes in described second operator scheme.
7, as one of at least described input equipment of claim 6 and claim 4 and 5, wherein, described control circuit comprises switch unit, is used for switching between described at least first and second operator schemes described control circuit.
8, as each described input equipment of claim 2 to 7, wherein, described first arrangement of electrodes is on described first carrier film, and wherein, described second arrangement of electrodes is on described second carrier film, and described first and second electrodes face with each other in described active zone.
9, input equipment as claimed in claim 8, wherein, described first and second electrodes comprise one of at least the presser sensor layer of arranging on it, become in the face of concerning with corresponding another electrode of described first and second electrodes.
10, as each described input equipment of claim 2 to 7, wherein, described first and second arrangement of electrodes are on described first carrier film, wherein, described arrangement of electrodes comprises the third electrode that is arranged on described second carrier film, described first and second electrodes in the face of described third electrode, make when compression force is on described pressure transducer in described active zone, set up between described first and second electrodes via described third electrode describedly to electrically contact.
11, input equipment as claimed in claim 10, wherein, described first, second and third electrode comprise one of at least the presser sensor layer of arranging on it, become to face with corresponding another electrode of described first, second and third electrode or corresponding other a plurality of electrodes and concern.
12, as claim 10 or 1 described input equipment, wherein, described first electrode comprises first conductor that a series of resistance connect, and wherein, described third electrode is faced described first electrode and described second electrode in described active zone, make when compression force is on described pressure transducer, set up between described second electrode and one or more described first conductor via described third electrode and describedly electrically contact.
13, input equipment as claimed in claim 12, wherein, described second electrode comprises second conductor that a series of conductions connect, described first and second conductor arrangement become mutually to intersect.
14, as claim 12 or 13 described input equipments, wherein, described first electric parameter is represented the position of described compression force on described pressure transducer, and wherein, described second electric parameter is represented the capacity coupled position between described first electrode and described second electrode.
15, as each the described input equipment in the claim 1 to 14, wherein, described control circuit is configured to export in response to first output signal of described first electric parameter with in response to second output signal of described second electric parameter.
16, input equipment as claimed in claim 15, wherein, described control circuit comprises at least the first and second output terminals, and described control circuit is configured to export described first output signal at described first output terminal, and exports described second output signal at described second output terminal.
17, as each described input equipment of claim 1 to 16, wherein, described first electrode is subdivided at least two electrode parts, and wherein, described at least two electrodes part is that electricity separates at least in described second operator scheme, partly each of described at least two electrodes is determined the described parameter of the electric capacity of described first electrode of expression respectively.
18, input equipment as claimed in claim 1, wherein, described first electric parameter is represented the electric capacity between described first electrode and described second electrode.
19, input equipment as claimed in claim 18, wherein, described sept has the opening of the active zone that defines described pressure transducer therein, described first arrangement of electrodes is on first carrier film described in the described active zone, described second arrangement of electrodes is on second carrier film described in the described active zone, described first and second electrodes are arranged with the relation that faces with each other, make when compression force is on described pressure transducer, make described first and second electrodes more together close in described active zone, wherein, described first and/or described second electrode have insulation course or the insulating pattern of arranging on it, make when making the more close time-out of described first and second electrodes, prevent short circuit between described first and second electrodes.
20, input equipment as claimed in claim 18, wherein, described first arrangement of electrodes is on described first carrier film, wherein, described second arrangement of electrodes is on described second carrier film, and the described relatively sept of described first and second electrodes is arranged to toward each other, described sept be electrical isolation with compressible, make when compression force is on described pressure transducer, make described first and second electrodes more together close.
21, as each described input equipment of claim 1 to 20, wherein, described control circuit is configured to, in the time of in described second operator scheme, and the amount of definite electric charge that on described first electrode, accumulates in response to applying the voltage of regulation to described first electrode.
22, as each described input equipment of claim 1 to 20, wherein, described control circuit is configured to, and in the time of in described second operator scheme, determines to flow in response to applying oscillating voltage to described first electrode amplitude and/or the phase place of the load current of described first electrode.
23, as each described input equipment of claim 1 to 20, wherein, described control circuit is configured to, in the time of in described second operator scheme, determine to flow into in-phase component and/or 90 ° of phase shift component of the load current of described first electrode in response to applying oscillating voltage to described first electrode.
24, as each described input equipment of claim 1 to 20, wherein, described control circuit is configured to, and in the time of in described second operator scheme, determines the duration of charging and/or the discharge time of described first electrode.
25, as each described input equipment of claim 18 to 24, wherein, described control circuit is configured to, in the time of in described second operator scheme, apply first voltage and apply second voltage to described second electrode to described first electrode, described first and second voltages have identical amplitude and phase place.
26, as each described input equipment of claim 18 to 25, wherein, described control circuit is configured to, in the time of in described first operator scheme, determine the amount of the electric charge that accumulates on another in described first and second electrodes in response to one in described first and second electrodes voltage that applies regulation.
27, as each described input equipment of claim 18 to 25, wherein, described control circuit is configured to, in the time of in described first operator scheme, determine in response to one in described first and second electrodes voltage that applies regulation the amount of the electric charge of accumulation on described in described first and second electrodes.
28, as each described input equipment of claim 18 to 25, wherein, described control circuit is configured to, in the time of in described first operator scheme, determine to flow into another the amplitude and/or the phase place of couple current in described first and second electrodes in response to one in described first and second electrodes applies oscillating voltage.
29, as each described input equipment of claim 18 to 25, wherein, described control circuit is configured to, in the time of in described first operator scheme, determine to flow into the amplitude and/or the phase place of described one load current in described first and second electrodes in response to one in described first and second electrodes applies oscillating voltage.
30, as each described input equipment of claim 18 to 25, wherein, described control circuit is configured to, in the time of in described first operator scheme, determine to flow into another in-phase component and/or the 90 ° of phase shift component of couple current in described first and second electrodes in response to one in described first and second electrodes applies oscillating voltage.
31, as each described input equipment of claim 18 to 25, wherein, described control circuit is configured to, in the time of in described first operator scheme, determine to flow into in-phase component and/or 90 ° of phase shift component of described one load current in described first and second electrodes in response to one in described first and second electrodes applies oscillating voltage.
32, as each described input equipment of claim 18 to 25, wherein, described control circuit is configured to, and in the time of in described first operator scheme, determines described first and/or the duration of charging and/or discharge time of described second electrode.
33, input equipment as claimed in claim 18, wherein, described first carrier film has a plurality of first electrodes that apply on it, described second carrier film has a plurality of second electrodes that apply on it, it is relative with the corresponding electrode in described a plurality of second electrodes that each described relatively sept in described a plurality of first electrode is arranged to, make in response to the force of compression that acts on the described pressure transducer, make the correspondingly electrode of opposite of described first and second electrodes more together close;
And wherein, described control circuit is configured to,
In the time of in described second operator scheme, determine the independent electrode of described a plurality of first electrodes of expression and the parameter of the electric capacity between the ground;
And in described first operator scheme time, determine the independent electrode in described a plurality of first electrodes of expression and the described correspondingly parameter of the electric capacity between the electrode of opposite of described a plurality of second electrodes.
34, input equipment as claimed in claim 33, wherein, described sept has a plurality of openings therein, wherein, corresponding aperture arrangement in each described relatively a plurality of opening in described a plurality of first electrode becomes relative with the corresponding electrode in described a plurality of second electrodes, make in response to the force of compression that acts on the described pressure transducer, make the correspondingly electrode of opposite of described first and second electrodes more together close.
35, input equipment as claimed in claim 18, wherein, described first carrier film has a plurality of first electrodes that apply on it, wherein, described second carrier film has a plurality of second electrodes that apply on it, the described relatively sept of described a plurality of first electrode is arranged to relative with described a plurality of second electrodes, described first electrode laterally extends to described second electrode, make in response to the force of compression of local action on described pressure transducer, make the electrode of opposite of described first and second electrodes more together close in the position of described compression force on described pressure transducer;
And wherein, described control circuit is configured to,
In the time of in described second operator scheme, determine the independent electrode of described a plurality of first electrodes of expression and the parameter of the electric capacity between the ground;
And in described first operator scheme time, determine the parameter of the electric capacity between the independent electrode of the independent electrode of described a plurality of first electrodes of expression and described a plurality of second electrodes.
36, input equipment as claimed in claim 18, wherein, described first carrier film has a plurality of first electrodes that apply on it, described second carrier film has second electrode that applies on it, the described relatively sept of described a plurality of first electrode is arranged to relative with described second electrode, make that in response to the force of compression of local action on described pressure transducer the independent electrode that makes described first electrode is more close described second electrode in the position of described compression force on described pressure transducer;
And wherein, described control circuit is configured to,
In the time of in described second operator scheme, determine the independent electrode of described first electrode of expression and the parameter of the electric capacity between the ground;
And in described first operator scheme time, determine the parameter of the electric capacity between the independent electrode of described second electrode of expression and described first electrode.
37, as claim 33,35 or 36 described input equipments, wherein, described sept has opening therein, the described aperture arrangement of the described relatively sept of described a plurality of first electrodes becomes relative with described second electrode, wherein, the capacitance electrode of described a plurality of first capacitance electrode and/or described second electrode has insulation course or the insulating pattern of arranging on it, makes short circuit between the capacitance electrode that prevents described a plurality of first capacitance electrode and described second electrode.
38, as claim 33,35 or 36 described input equipments, wherein, described sept be electrical isolation with compressible, and wherein, when compressing described sept, make more close described second electrode of independent electrode of described first electrode in response to acting on the force of compression on the described pressure transducer.
39, as each the described input equipment in the claim 1 to 38, wherein, described first carrier film, described sept and described second carrier film are stacked together.
CNA2007800268494A 2006-07-18 2007-07-17 Input device Pending CN101490642A (en)

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US11/488,241 US8063886B2 (en) 2006-07-18 2006-07-18 Data input device
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