KR101825584B1 - Touch panel having carbon micro coil tactile sensor - Google Patents

Abstract

The present invention relates to a touch panel capable of sensing touch coordinates and a touch pressure using a change in impedance of a sensing unit including a carbon micro-coil by a touch input by a user, An electrode portion including a first electrode portion formed in a first axis direction and a second electrode portion formed in a second axis direction and a second electrode portion functioning as an impedance element for a drive signal applied to the first electrode portion, And a function of generating an impedance signal by measuring at least one of resistance, inductance and capacitance of the sensing part by receiving the sensing signal from the sensing part, and a function of generating an impedance signal by measuring at least one of resistance, inductance and capacitance of the sensing part And the impedance signal received from the impedance measuring unit Coordinate value is made to include a pattern or a touch processor having a function to determine the pressure pattern, and provides the detected carbon micro-coil unit for a touch panel comprising a carbon micro-coil of tactile sensor modules.

Description

[0001] The present invention relates to a touch panel having a carbon micro-coil tactile sensor,

The present invention relates to a touch panel including a carbon micro-coil tactile sensor, and more particularly, to a touch panel using a touch sensor, And a touch panel disposed at a lower portion of the display panel.

Various electronic apparatuses are being developed through the development of electronic communication technology. Such electronic apparatuses are gradually emphasizing design convenience with ease of user's operation, and diversification of input apparatuses is emphasized according to this trend. This type of input device has evolved from input devices such as keyboards and keypads to touch panels. In particular, since the launch of Apple's smartphones in 2007, input devices such as touch panels have stimulated consumers' Respectively. The touch panel market has the potential to expand beyond other products such as smartphones, tablet PCs, notebook PCs, AIO (All-In-One) PCs and DID (Digital Information Display) And multi-functionalization, and a low-price strategy for securing market dominance, development of touch panel technology in which flexible touch sensor, large area touch sensor, fingerprint recognition, and digitizer are internalized is being promoted.

The touch panel is composed of a touch sensor that senses and responds to the user's reaction, a controller that electrically converts signals generated by the touch sensor, and a micro controller unit (MCU) that instructs a specific operation by interfacing signals generated by the controller with displays and other electronic components And may be classified into a resistive method, an infra-red method, a surface acoustic wave (SAW) method, a capacitive method, and the like depending on an implementation method.

The resistive method is a method in which two sheets of substrates coated with electrodes are bonded together and then the upper and lower plates contact each other by applying pressure to the upper plate, thereby recognizing the position by the electric signal generated. Has been adopted for the initial PDA and navigation and the like. In this regard, in Korean Patent No. 10-0628265 (titled "Resistive Film Type Touch Panel," hereinafter referred to as "Prior Art 1"), a first substrate and a second substrate, each having a transparent conductive film, And a plurality of dot spacers spaced apart from each other by a predetermined distance between the first substrate and the second substrate and formed in a polygonal columnar shape.

The infrared (infra-red) method is advantageous in that it has excellent durability by detecting the coordinates by using the characteristic that the light is straight and the obstacle is blocked. In this regard, in Korean Patent Laid-open Publication No. 10-2014-0135944 (entitled "Infrared Touch Module, Infrared Touch Screen Panel and Display Device, hereinafter referred to as Prior Art 2"), And an infrared receiving unit mounted on two adjacent sidewalls of the circuit board outer frame, wherein the infrared emitting unit comprises a plurality of infrared rays emitted from a plurality of infrared rays Wherein the infrared receiving unit comprises a plurality of first infrared receivers corresponding one to one to the infrared emitters, each receiving infrared rays of horizontal direction emitted from a corresponding infrared emitter, The infrared ray emitting unit is located above or below the infrared ray emitters, Further comprising reflectors for reflecting the infrared rays emitted to them from the emitters, wherein the reflector reflects the horizontal infrared rays emitted by each of the infrared emitters and the horizontal infrared rays reflected by the reflector corresponding to the infrared emitters An infrared touch module is further disclosed wherein the orthographic projection on a horizontal plane has an angle set therebetween and the infrared receiver unit further comprises second infrared receivers for receiving the infrared rays in the horizontal direction reflected by the reflector have.

The surface acoustic wave (SAW) method uses the propagation characteristics of sound, and is a method of recognizing the position by detecting the point in time when an object does not receive the ultrasonic wave by blocking the traveling direction of the surface wave, and has an advantage of excellent durability. In this regard, Korean Patent Laid-Open Publication No. 10-2014-0123508 (entitled Ultrasonic Touch Sensor Having Display Monitor, hereinafter referred to as Prior Art 3) discloses a display monitor for providing a visual image as a touch screen display, Discloses a touch screen display including an ultrasonic device capable of emitting ultrasound energy and capable of detecting reflected ultrasonic energy.

The capacitive method is a self capacitance method and mutual capacitance method. The self capacitance method is a method in which a capacitance value that increases when a finger touch is made between a touch pad and a ground The mutual capacitance method detects a decrease in capacitance generated between the sensing electrode and the driving electrode during finger contact. In this regard, in Korean Patent No. 10-1340026 (entitled "Capacitive touch screen panel and method of manufacturing the same, hereinafter referred to as conventional technique 4"), a substrate having a screen region and an inactive region, A first electrode pattern part and a second electrode pattern part respectively formed on the side surface and the other side surface area of the substrate and electrically connected to the first electrode pattern part and the second electrode pattern part on one side surface and the other surface non- Wherein the first electrode pattern portion and the second electrode pattern portion and the first outer electrode wiring portion and the second outer electrode wiring portion are formed of the same Wherein each of the first electrode pattern and the second electrode pattern forming the first electrode pattern portion and the second electrode pattern portion is formed in the shape of a mesh when viewed in a plan view, A reinforcing conductive film is further formed on the first outer electrode wiring and the second outer electrode wiring formed on one side surface and the other side non-active area of the substrate by electrolytic / electroless plating or punching, And the touch panel is configured to detect a contact position according to a change in capacitance due to a contact between the first electrode pattern part and the second electrode pattern part.

Korean Patent No. 10-0628265 Korean Patent Publication No. 10-2014-0135944 Korean Patent Publication No. 10-2014-0123508 Korean Patent No. 10-1340026

SUMMARY OF THE INVENTION [0008] The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method for manufacturing a multi- The fourth problem that the conventional technology 2 is slow in response speed, the fourth problem that the conventional technology 3 is vulnerable to contamination, the fourth problem that the conventional technology 4 is difficult to operate by a hand with a pen or glove, 6, and the seventh problem that the prior art 4 has a considerable difficulty in manufacturing a large-sized display panel.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to another aspect of the present invention, there is provided a carbon micro-coil tactile sensor module for a touch panel, which is provided in a touch panel and determines a touch coordinate pattern or a touch pressure pattern by sensing a touch input by a user, And a second electrode portion formed in a second axial direction, and a second electrode portion that functions as an impedance element with respect to a driving signal applied to the first electrode portion, And a function of generating an impedance signal by measuring at least one of a resistance, an inductance and a capacitance of the sensing unit by receiving the sensing signal from the sensing unit, And a controller for processing the impedance signal received from the measuring unit and the impedance measuring unit, It is made to include a processor having a function to determine the pattern table or touch pressure pattern, and provides the detection part carbon micro-coil for a touch comprising a carbon micro-coil panel, the touch sensor module.

According to an embodiment of the present invention, the sensing unit may mix the carbon micro-coils by 2 to 10 wt%.

According to an embodiment of the present invention, the carbon micro-coil may have a three-dimensional spiral shape with a diameter of 1 to 10 micrometers and a length of 10 to 500 micrometers.

According to an embodiment of the present invention, the carbon micro-coil may be characterized in that the diameter of the carbon fiber forming the coil is 0.01 to 1 micrometer.

According to an embodiment of the present invention, the processor further includes a function of converting the impedance signal into a digital signal to determine the touch coordinate pattern or the touch pressure pattern.

According to an embodiment of the present invention, the touch panel carbon micro-coil tactile sensor module further includes a drive signal generator for applying the drive signal to the first electrode unit.

According to an embodiment of the present invention, the touch panel carbon micro-coil tactile sensor module further includes a substrate portion on which the electrode portion is formed.

According to an embodiment of the present invention, the substrate portion may include a first substrate on which the first electrode portion is formed and a second substrate on which the second electrode portion is formed.

According to an embodiment of the present invention, the substrate portion may include a first substrate on which the first electrode portion and the second electrode portion are formed.

In addition, the present invention provides a touch panel including a carbon micro-coil tactile sensor module for a touch panel, the touch panel being disposed under the display panel.

The present invention also provides a flexible touch panel including a carbon micro-coil tactile sensor module for a touch panel, the flexible touch panel being disposed under the flexible display panel.

According to another aspect of the present invention, there is provided a method of sensing an input touch of a carbon micro-coil tactile sensor module for a touch panel, the method comprising the steps of: applying a driving signal to a first electrode unit; sensing a touch input to a predetermined portion of the touch panel; Measuring an impedance of at least one of a resistance, an inductance and a capacitance of the sensing unit to generate an impedance signal; and processing the impedance unit to process the impedance signal to determine a touch coordinate pattern or a touch pressure pattern. The present invention provides an input touch detection method of a carbon micro-coil tactile sensor module for a touch panel.

According to the present invention, it is known that the sensitivity of a sensor made of a carbon micro-coil is several times higher than that of a typical resistive-type sensor or a capacitive-type sensor, The second effect is that it can detect not only contact and pressure of objects with a simple structure touch panel, but also detection of close objects. By using carbon micro-coil with microscale diameter, touch panel can be miniaturized The fourth effect is that the carbon micro-coil can be applied to electronic devices having various shapes because of its high degree of freedom in shape. The touch panel mainly senses a finger of a person. The carbon micro-coil has a unique characteristic Which is suitable for the general public. A sixth effect that a multi-touch can be realized, a seventh effect that a response speed is fast because a carbon micro-coil is used, an eighth effect that a texture of a target can be detected, The ninth effect that the device including the touch panel and the display panel can be thinned, the sharpness of the device can be improved, and the other problems of the above-described prior art do not appear.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the composition of the invention described in the claims.

1 is a schematic view showing an embodiment of a carbon micro-coil tactile sensor module for a touch panel according to the present invention.
FIG. 2 is an equivalent circuit diagram illustrating an equivalent circuit including a resistor, an inductor, and a capacitor, according to an embodiment of the present invention. FIG.
FIG. 3 is a graph illustrating a change in the real part of the impedance of the sensing unit when the sensing unit approaches or separates an object. FIG.
4 is a graph illustrating an inductance change of the sensing unit when a load is applied to a predetermined area of the sensing unit vertically.
5 is a graph showing an inductance and a capacitance change of the sensing unit when the sensing unit is brought into contact with the needle, according to an embodiment of the present invention.
6 is a graph showing inductance and capacitance change of the sensing unit when the brush is brought into contact with the sensing unit, according to an embodiment of the present invention.
FIG. 7 is a graph showing the sensitivity of the sensing unit to a non-living body, according to an embodiment. FIG.
8 is a graph showing the sensitivity of the sensing unit to living organisms, according to an embodiment of the present invention.
9 is a graph showing the sensitivity to copper of the sensing portion as one embodiment.
10 is a graph showing sensitivity of the sensing unit to acryl, according to one embodiment.
11 is a schematic diagram showing an embodiment of a carbon micro-coil tactile sensor module for a touch panel according to the present invention.
12 is a schematic diagram showing that the first electrode portion and the second electrode portion are formed on different planes, according to one embodiment.
13 is a schematic diagram showing that the first electrode portion and the second electrode portion are formed on the same plane as one embodiment.
FIG. 14 is a schematic view showing that the second electrode portion is formed at the lower portion of the display panel, according to one embodiment. FIG.
15 is a graph illustrating an inductance change of the sensing unit when the touch pressure is increased in the sensing unit.
16 is a schematic diagram showing a state in which writing is performed with a stylus on a smart device having a touch panel according to an embodiment of the present invention.
FIG. 17 is a schematic diagram showing a state in which writing is performed using a stylus on a smart device having a touch panel according to an embodiment of the present invention. FIG.
18 is a schematic diagram showing a state in which writing is performed with a stylus on a smart device having a touch panel according to an embodiment of the present invention.
19 is a schematic diagram showing an embodiment of a flexible touch panel of the present invention.
20 is a schematic diagram showing a state in which touch pressure is applied to touch coordinates of a touch panel in n steps according to an embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The touch panel 1 of the present invention includes a carbon micro-coil tactile sensor module 10 for a touch panel, and the touch panel 1 is positioned below the display panel. 12 to 14 show a touch panel 1 positioned at a lower portion of the display panel, and not all components of the touch panel 1 are shown in Figs. The display panel may be a liquid crystal display (LCD), an organic light emitting diode (OLED), an electroluminescent display (ELD), a plasma display panel (PDP) A field emission display (FED), and an electrophoretic display (EPD). However, the present invention is not limited thereto. The display panel is a well-known technology, and is not a constituent element of the present invention, so a detailed description thereof will be omitted. Throughout this specification, the user inputs a touch on the touch panel 1, as the user touches or touches the surface of the display panel with the finger or the stylus (which means, for example, a cover window as an interface) Meaning that the touch panel 1 located under the display panel is pressed by pressing the display panel. However, the present invention is not limited to the touch input means of the user to a finger or a stylus, and it is possible to exclude the case where the touch input means does not directly contact the surface of the display panel and the user touches the surface of the display panel with the gloved hand no. The carbon micro-coil tactile sensor module 10 for a touch panel of the present invention, which is provided in the touch panel 1, senses a touch inputted by a user and determines a touch coordinate pattern, a touch pressure pattern or a touch coordinate pattern and a touch pressure pattern And includes an electrode unit 100, a sensing unit 200, an impedance measuring unit 300, and a processor unit 400. 1, there is shown an embodiment of such a carbon micro-coil tactile sensor module 10 for a touch panel. Hereinafter, referring to FIG. 1, Will be described in detail.

The electrode unit 100 includes a first electrode unit 110 and a second electrode unit 120. The first electrode unit 110 and the second electrode unit 120 include a plurality of electrodes 101 . A plurality of electrodes 101 are formed in a first axis direction in the first electrode unit 110 and a plurality of electrodes 101 are formed in a second axis direction in the second electrode unit 120. 1, the conventional x-axis is defined as the first axis and the normal y-axis is defined as the second axis. However, the first and second axes are limited to the normal x-axis and the y-axis. It does not. And the axes rotated by a predetermined angle from the normal x-axis and y-axis can be the first axis and the second axis. In FIG. 1, reference numerals are not given to all the electrodes 101. In the following description, reference numerals in parentheses denote upper-layer elements, and the same shall apply hereinafter. For example, reference numeral 110 denotes the first electrode unit 110, and reference numeral 100 denotes the electrode unit 100. The first electrode unit 110 and the second electrode unit 120 intersect perpendicularly to each other to form a plane coordinate system. Each coordinate of the plane coordinate system corresponds to each touch coordinate that can be detected when a user inputs a touch . For reference, when the touch input means touches the surface of the display panel (the touch input means touches the surface of the display panel, the touch panel includes the case where the user touches the surface of the display panel with a gloved hand The same shall apply hereinafter), the coordinates of the point of contact, and so on. The touch pressure is a pressure applied to the touch coordinates, and refers to the pressure applied to the surface of the display panel and transmitted to the touch panel 1 located at the lower portion of the display panel. In FIG. 1, the first electrode unit 110 and the second electrode unit 120 are shown as being in contact with each other. However, the first electrode unit 110 and the second electrode unit 120 are formed in a plan view, 110 and the second electrode unit 120 are not connected but electrically isolated. 1, when a driving signal is applied to the first electrode unit 110, the driving signal is input to the sensing unit 200, which will be described later, and the sensing signal output from the sensing unit 200, If the first electrode unit 110 and the second electrode unit 120 are electrically connected to each other through the electrode unit 120, the circuit constituting the carbon micro-coil tactile sensor module 10 for a touch panel may be short- have. Therefore, even if the first electrode unit 110 and the second electrode unit 120 intersect with each other in this specification, it does not mean that the first electrode unit 110 and the second electrode unit 120 are connected. The electrode 101 may include at least one selected from copper, silver, gold, nickel, zinc, iron, aluminum, tin, chromium, molybdenum and alloys or solid solutions thereof but is not limited thereto. The electrode 101 may be formed by a method of printing a conductive ink on a substrate 500 to be described later (an electronic printing process), a method of attaching a conductive material to a substrate 500 by pressing, a sputtering, an electron beam deposition, It can be formed by spin coating, but other methods are not excluded. In addition, the electrode 101 is formed in the same manner as described above, but the electrode 101 having a large area is formed and etched, or the portion where the electrode 101 is to be formed is etched in the substrate portion 500, The electrode 101 may be formed, but the present invention is not limited thereto.

The sensing unit 200 may be manufactured by kneading a predetermined organic vehicle and a carbon micro-coil powder, and performing tape casting, casting, injection molding, extrusion molding, or compression molding, but is not limited thereto. When the sensing unit 200 alone is placed separately from the touch panel 1, the sensing unit 200 exhibits a characteristic in which the impedance changes as the object approaches, touches, or presses due to the carbon micro-coils contained therein Therefore, it can be said that it functions as an impedance element with respect to an applied AC, and can be used as a proximity sensor or a tactile sensor. Accordingly, the sensing unit 200 provided in the touch panel 1 also exhibits a characteristic in which the impedance changes as the touch input means touches the surface of the display panel or the touch input means presses the surface of the display panel, And functions as an impedance element with respect to the driving signal applied to the driving circuit 110. The sensing unit 200 included in the touch panel 1 receives a driving signal applied to the first electrode unit 110 and generates a sensing signal by causing the driving signal to pass through a changed impedance according to a touch input of the user The sensing signal means a voltage or current corresponding to the changed impedance.

Considering that the impedance of the sensing unit 200 changes due to contact or pressing of the object, the sensing unit 200 may be considered as a circuit including at least one of a resistor, an inductor, and a capacitor. (200) can be regarded as an equivalent circuit diagram shown in Fig. However, since FIG. 2 is only an embodiment, the equivalent circuit diagram of FIG. 2 may be expressed by another equivalent circuit diagram by using a method such as serial or parallel conversion of each element by circuit theory, It is also possible that an equivalent circuit diagram having an impedance different from the impedance held by the equivalent circuit diagram of Fig. 2 may appear depending on the composition and alignment state of the carbon micro-coils included in the sensor 200, the size and shape of the sensing unit 200, and the like. In this regard, the equivalent circuit diagram of the sensing unit 200 does not necessarily include all of the resistors, inductors, and capacitors as in the case of FIG. 2, and the characteristics of one or more of the resistors, inductors, and capacitors in the equivalent circuit diagram of the sensing unit 200 Can be dominant. Therefore, the expression that the impedance changes throughout the present specification is of course an imaginary part of the impedance which is a parameter of the impedance, an imaginary part of the impedance (reactance), a magnitude of the impedance, a phase angle of the impedance, a real part of the admittance (conductance) The sense portion 200, the inductance, the magnitude of the admittance, and the phase angle of the admittance are changed. However, when the sensing portion 200 is an equivalent circuit composed of at least one of a resistor, an inductor, and a capacitor, ), Inductance, and capacitance of a capacitor.

Two metal electrodes (one anode and one cathode) are connected to the sensing unit 200 separately from the touch panel 1, an AC power source is applied to the metal electrode, and the object is approached and separated By measuring the impedance of the sensing unit 200, the same result as the graph shown in FIG. 3 can be obtained. FIG. 3 is a graph in which the real part of the impedance is a dependent variable among various parameters of the impedance. As the object approaches the sensing part 200 through the graph, the real part of the impedance of the sensing part 200 increases, It can be seen that the real part of the impedance becomes maximum when the object contacts the part 200 and the real part of the impedance decreases when the object is separated from the sensing part 200. [ When this characteristic is applied to the touch panel 1, when the user inputs a touch to the touch panel 1, since the sensing unit 200 is not exposed to the outside of the touch panel 1, The impedance change of the portion of the sensing portion 200 corresponding to the point where the touch input means and the surface of the display panel are in contact with each other may be smaller than the impedance change of the other portion of the sensing portion 200 The touch coordinates can be found by using a much bigger one. For example, the coordinates formed by the intersection of the first electrode unit 110 and the second electrode unit 120 shown in FIG. 1 may correspond to the respective parts of the sensing unit 200, The coordinates formed by the intersection of the first electrode unit 110 and the second electrode unit 120 may correspond to the respective parts of the surface of the display panel existing on the upper part of the sensing unit 200. FIG. (3, 3) of the sensing unit 200 when the touch input means is in contact with the surface of the display panel in the coordinate system of the display panel, It is possible to find out that the touch coordinate is (3, 3) by finding out that the impedance change is greatest.

(Two positive electrodes and one negative electrode) are connected to the sensing portion 200 separately from the touch panel 1, an AC power source is applied to the metal electrodes, And the impedance of the sensing unit 200 is measured while applying a pressure to the sensing unit 200 in the vertical direction, the same result as the graph shown in FIG. 4 can be obtained. FIG. 4 is a graph in which a dependent variable is an inductance variation. In the case where the characteristic of the inductor is dominant in the sensing unit 200, the inductance is measured instead of the impedance. 4, it can be seen that as the pressure applied to the sensing unit 200 increases, the inductance change also increases (the graph shown in FIG. 4 uses a unit of mN, but the constant area of the sensing unit 200 Because the load is applied to the experiment, the applied load is expressed as the pressure. When such a characteristic is applied to the touch panel 1, as the user inputs a touch to the touch panel 1 and the touch input means presses the surface of the display panel, a point at which the touch input means touches the surface of the display panel The touch pressure can be obtained by using the increase in inductance of the portion of the sensing unit 200 corresponding to the touch sensor. For example, in the plane coordinate system shown in FIG. 1, when the touch input means is pressed on the surface (3, 3) of the display panel, (A) the impedance change of the sensing portion 200 is measured for each coordinate It is found that the touch coordinate is (3, 3) by finding that the impedance change is greatest at (3, 3) of the sensing unit 200 and then the inductance change at (3, 3) of the sensing unit 200 is measured (B) the change in inductance of the sensing unit 200 is measured for each coordinate, and the change in inductance at (3, 3) of the sensing unit 200 is greatest It is possible to find out the touch pressure corresponding to the change of the inductance.

The sensing unit 200 may sense the texture of the object due to the carbon micro-coils contained therein. (One anode and one cathode) are connected to the sensing unit 200 separately from the touch panel 1 and AC power is applied to the metal electrode. Then, the needle is connected to the sensing unit 200, 5, when the impedance of the sensing unit 200 is measured while repeating the contact and the detaching of the sensing unit 200, the sensing unit 200 is repeated while the brush is brought into contact with the sensing unit 200, The same result as the graph shown in FIG. 6 can be obtained. 5 and 6 are graphs in which the dependent variable is the inductance and the capacitance change, and the inductance and the capacitance are measured instead of the impedance when the characteristics of the inductor and the capacitor appear dominantly in the sensing unit 200. Referring to FIGS. 5 and 6, it can be seen that the inductance and the capacitance change of the sensing part 200 rapidly increase and decrease as compared to when the brush is brought into contact with the needle, The area of the portion contacting the sensor 200 and the pressure applied to the sensing portion 200 by the needle and the brush are different. Such a characteristic may be applied to the touch panel 1 to enable the sensing unit 200 in the touch panel 1 to sense the texture of the touch input means, which will be described later.

The sensing unit 200 has a function as a tactile sensor because it includes a carbon micro-coil therein, but the sensing unit 200 can not sense all kinds of objects. 7 to 10 show the sensitivity of the sensing unit 200 including the carbon micro-coil according to the type of the object (a result obtained by experimenting only the sensing unit 200 separately from the touch panel 1) . 7 and 8, the sensing unit 200 including the carbon micro-coil can sense both living organisms and living organisms well. However, when the sensitivity of the sensing part 200 including the carbon micro-coil is divided by dividing the kind of the non-living body, a metal such as copper exhibits good sensitivity (FIG. 9), and for an insulator including a polymer such as acrylic The sensitivity is lowered (FIG. 10). Therefore, the touch input means for inputting a touch by a user in the present specification means a stylus (excluding another input means) including a finger or a metal material of a person who is an organism.

The sensing unit 200 suggests that the carbon microcoils are mixed by 2 to 10 wt%. When the carbon micro-coils are mixed with less than 2 wt%, the impedance of the sensing unit 200 may be small with respect to the touch input by the user. When the carbon micro-coils are mixed with more than 10 wt% The sensitivity of the sensing unit 200 to the touch input by the user may be lowered because the electrical conductivity of the sensing unit 200 is rapidly increased due to the percolation of the micro coils connected to each other. Also, the carbon micro-coils included in the sensing unit 200 preferably have a three-dimensional spiral shape and have a length of 10 to 500 micrometers. The longer the length of the carbon micro-coil, the greater the sensitivity of the sensing unit 200 is, but the dispersibility of the carbon micro-coil in the sensing unit 200 decreases. The diameter of the carbon micro-coil is preferably 1 to 10 micrometers, and the diameter of the carbon fiber forming the coil is preferably 0.01 to 1 micrometer, but the present invention is not limited thereto.

Considering that the sensing unit 200 is provided on the touch panel 1, the sensing unit 200 may be in the form of a thin sheet, but is not limited thereto. 1, the sensing unit 200 is disposed between the first electrode unit 110 and the second electrode unit 120 (refer to FIG. 12) to form the first electrode unit 110 and the second electrode unit 120, As shown in FIG. 11, the sensing unit 200 may be formed as a plurality of units, and each sensing unit 200 may include a plurality of sensing units 200, (Not shown as a unit for all units in Fig. 11). The shape of the sensing unit 200 shown in FIG. 11 is such that the interference related to the impedance change between the respective coordinates is relatively less than that of the sensing unit 200 shown in FIG. 1, It is possible to detect the touch more accurately than the shape of the portion 200. In addition, each unit constituting the sensing unit 200 shown in FIG. 11 is shown in a rectangular shape, which is also an embodiment, and may be various shapes such as a rhombus and a circle.

The impedance measuring unit 300 receives the sensing signal from the sensing unit 200 and measures the impedance of the sensing unit 200. The impedance measuring unit 300 measures the resistance of the sensing unit 200, And measuring the at least one of the capacitances, thereby generating an impedance signal. The measurement of the above (C) or (D) may be carried out for all the coordinates, but the measurement of (C) or (D) may be carried out for the specific coordinates. For example, the measurement of (C) or (D) may be performed for all the coordinates in order to find the coordinates that the touch input means makes contact with. However, in order to determine the pressure applied by the touch input means, The measurement of the above (C) or (D) may be carried out only for the coordinates.

The impedance measuring unit 300 may be an impedance analyzer or the like. In this case, by measuring the impedance of the coordinates of the sensing unit 200, the impedance of the real part of the impedance, the reactance, Inductance-capacitance connected in series, resistance-inductance-capacitance connected in series, and the like, in addition to the impedance of the output terminal.

The impedance measuring unit 300 may be an oscilloscope or the like and may measure the resistance of the coordinate of the sensing unit 200 when the characteristic of the resistance is dominant in the sensing unit 200, The inductance of the coordinate of the sensing unit 200 can be measured when the characteristic of the inductor is dominant and the capacitance of the coordinate of the sensing unit 200 can be measured when the characteristic of the capacitor is dominant. The inductance and capacitance connected in series or in parallel can be measured when the characteristics of the inductor and the capacitor are dominant in series or in parallel with respect to the coordinate of the sensing unit 200. If the characteristics of the resistor and the inductor are dominant in series or in parallel You can measure resistors and inductances connected in series or in parallel, and measure the resistance and capacitance connected in series or in parallel when the characteristics of the resistors and capacitors are dominant in series or in parallel. In addition, when the characteristics of the resistor, the inductor, and the capacitor are dominant in the serial, parallel, or series / parallel combination with respect to the coordinate of the sensing unit 200, the resistance, inductance, The capacitance can be measured.

Therefore, the impedance signal generated by the impedance measuring unit 300 may be a resistance, an inductance, and a capacitance of each element constituting the equivalent circuit diagram of the coordinates of the sensing unit 200, And may be related to at least one of the real part of the impedance, the reactance, the magnitude of the impedance, the phase angle of the impedance, the conductance, the susceptance, the magnitude of the admittance and the phase angle of the admittance with respect to the coordinates .

The processor unit 400 has a function of processing the impedance signal received from the impedance measuring unit 300 to determine a touch coordinate pattern or a touch pressure pattern. The processor unit 400 may further include a function of converting the impedance signal into a digital signal to determine a touch coordinate pattern or a touch pressure pattern. (E) For example, when a touch is input to a portion of the surface of the display panel corresponding to (3, 3) shown in FIG. 1, the driving signal is sequentially applied to each row of the coordinates, The impedances of all the coordinates can be measured by measuring the impedances of the respective coordinates of the coordinates At this time, the impedance measuring unit 300 can generate an impedance signal related to the real part of the impedance of all the coordinates, and the processor unit 400 receives the impedance signal, converts the received impedance signal into a digital signal, The touch coordinate patterns 11 and 11 can be determined with respect to the largest coordinate. The impedance measuring unit 300 can then measure the inductance of (3,3) by applying only the driving signal to (3,3), and the impedance measuring unit 300 measures the inductance of (3,3) It is possible to generate an impedance signal. The processor unit 400 receives the impedance signal, converts the impedance signal into a digital signal, and then determines a touch pressure pattern corresponding to the change in inductance at (3, 3).

The carbon micro-coil tactile sensor module 10 for a touch panel can determine an area of a portion to be touched by the touch input means, a shape of the touch input means, and a texture of the touch input means in addition to the touch coordinates or the touch pressure . When a user inputs a touch, a touch can be input between the coordinates of the plane coordinate system formed by the first electrode unit 110 and the second electrode unit 120. In this case, The distance between the first electrode unit 110 and the second electrode unit 120 may be made narrower so that the electrode unit 100 is formed and then a plurality of touch coordinates are obtained If the carbon micro-coil tactile sensor module 10 for a touch panel is configured so that multi-touch is possible, an error in which touch coordinates are calculated incorrectly can be reduced. However, the above-mentioned method of finding the touch coordinates can not recognize the multi-touch because it measures the impedance change of all the coordinates and finds the coordinate having the greatest change in impedance. If the user inputs a touch, measuring the impedance change of all the coordinates, and if all of the coordinates having the impedance change are touch coordinates, too many touch coordinates will be calculated. This is because the sensing unit 200 including the carbon micro-coil has a characteristic in which the impedance changes not only with respect to the object to be contacted but also to a nearby object. Therefore, it is necessary to design a reference value to some extent, and to make multi-touch possible by using only the coordinate having the impedance change larger than the reference value as the touch coordinates. For example, in FIG. 3, a reference value x ₁ is displayed. The reference value x ₁ indicates a real part of the impedance of the sensing unit 200 when the touch input unit contacts the surface of the display panel. Accordingly, if only the coordinates of the sensing unit 200 exhibiting the impedance change of the reference value x ₁ or more are regarded as the touch coordinates, the touch panel carbon micro-coil tactile sensor module 10 can recognize the multi-touch. In the case where multi-touch is possible, the shape of the touch input means can be determined by connecting three or more coordinates to obtain the area of the portion where the touch input means and the surface of the display panel are in contact, or by connecting two or more coordinates. On the other hand, there may be a problem in the method of detecting the touch pressure. When the pressure of the touch input means is applied to the surface of the display panel, the change of the inductance of the sensing portion 200 is too small to accurately calculate the touch pressure . FIG. 15 shows a change in inductance of the sensing unit 200 when the touch pressure is increased with time. In this graph, the reference value x ₂ to the reference value x ₁₀ are displayed. So haenoteun specified in the following, it applied to two-stage touch pressure be seen the first step touch pressure, x ₂ inductance change of more and less than x ₃ cases showing a sensing unit 200, the inductance change of less than x ₂ with respect to the touch pressure, and If a 10-step touch pressure is designated as the inductance change of x ₁₀ or more by designating in this way, high-precision sensing is possible for at least ten kinds of touch pressures (not limited to 10 steps, You can specify fewer or more n steps than the 10 steps as shown. 16 to 18 illustrate a case where a stylus is used for a smart device having a touch panel 1, and a touch screen FIG. In Fig. 16, the above figure draws a stroke by standing the stylus, and the drawing below draws a stroke by laying down the stylus. The texture of the tip of the stylus when the stylus is erected and when laid down is clearly different. When touching the stylus, the touch coordinates a1, a2, etc. are sensed and the space between the touch coordinates is recognized by the smart device as a line, so that a fine stroke can be detected and output. When the stylus is laid down, B4, and so on are detected and the space between the touch coordinates is recognized as a line or a face by the smart device, so that a thick stroke can be detected and output. Fig. 17 shows a tip with a pointed stylus, and Fig. 18 shows a stylus with a tip in the form of a brush. The texture of the stylus tip in Fig. 17 and the stylus tip in Fig. 18 are clearly different. 17, touch coordinates A1 to A9 and the like are sensed, and the space between the touch coordinates is recognized as a line or a face by the smart device, so that Gothic letters can be output. 18, touch coordinates B1 to B36 and the like are sensed and the space between the touch coordinates is recognized as a line or a face by the smart device, so that the letter of the letter can be outputted. Although not shown in Figs. 16 to 18, the text can be output in a rich or soft manner depending on the degree of the touch pressure. The touch coordinates and the touch pressure are factors that determine the texture of the touch input means, but do not exclude other elements.

The carbon micro-coil tactile sensor module 10 for a touch panel may further include a storage unit 700 storing reference data 710 and reference data 710 as shown in FIG. The reference data 710 records the aforementioned reference values x ₁ to x ₁₀ , a predetermined touch coordinate pattern code, a predetermined touch pressure pattern code, and the like. When the touch coordinate pattern is determined, the processor unit 400 may assign a touch coordinate pattern code to the determined touch coordinate pattern by comparing the determined touch coordinate pattern with the reference data 710. [ In addition, when the touch pressure pattern is determined, the processor unit 400 may assign the touch pressure pattern code to the determined touch pressure pattern by comparing the determined touch pressure pattern with the reference data 710. [ When the touch panel 1 is combined with a display panel or the like to form a smart device, a function having the touch coordinate pattern code or the touch pressure pattern code as an independent variable is called, and each touch coordinate pattern code or each touch pressure pattern code Allowing the star function to be executed on the smart device.

The carbon micro-coil tactile sensor module 10 for a touch panel may further include a drive signal generator 600 for applying a drive signal to the first electrode unit 110 as shown in FIG. The driving signal generating unit 600 may sequentially apply the driving signals to the respective rows of the first electrode unit 110 (time division), sequentially apply the driving signals to the first electrode unit 110 by two rows, (Code division), but the present invention is not limited thereto (the row means the x-axis of the coordinate system, and the column means the y-axis of the coordinate system) ).

The carbon micro-coil tactile sensor module 10 for a touch panel may further include a substrate unit 500 on which the electrode unit 100 is formed, as shown in FIG. The substrate unit 500 may be formed of one or more substrates, and the at least one substrate may include a printed circuit board (PCB) or a flexible printed circuit board (FPCB). However, no. 12, the first electrode unit 110 and the second electrode unit 120 are formed on the first substrate 510 and the second electrode unit 120 is formed on the first substrate 510, 2 substrate 520 and the first and second electrode units 110 and 120 may be formed on the first substrate 510 as shown in FIG. 14, the first electrode unit 110 may be formed on the first substrate 510, and the second electrode unit 120 may be formed on the lower surface of the display panel. It is needless to say that the manner in which the substrate unit 500 and the electrode unit 100 are formed is not limited to the above three. However, since the first electrode unit 110 and the second electrode unit 120 are electrically insulated as described above, the first electrode unit 110 and the second electrode unit 120 may be formed of the same material, It is necessary to form an insulating layer or an insulating pattern between the first electrode unit 110 and the second electrode unit 120 as shown in FIG. 13, It does not exclude other methods. In addition, the insulating layer or insulating pattern is a silicon nitride (SiNx), silica (SiO _2), alumina (Al ₂ O _3), pentoxide, tantalum (Ta ₂ O _5), phosphorus pentoxide and niobium (Nb ₂ O _5), titanium dioxide ( TiO ₂ ), or an organic film (organic material) such as photo-acrylic, but the present invention is not limited thereto. Although the adhesive layer is not shown in Figs. 12 to 14, an adhesive layer may exist between each layer, and it may be necessary to firmly adhere the layers to each other. For example, in FIG. 12, an empty space is seen between the electrodes (101, all electrodes are not labeled) of the second electrode unit 120, The first electrode unit 200, the second electrode unit 120, and the second substrate 520 are in close contact with each other without a gap. When the sensing unit 200 is bonded to the second substrate 520 on which the second electrode unit 120 is formed by using an adhesive layer as in this case, 200 may be bent, so care must be taken not to break the sensing part 200 in the same place as the bent part. The adhesive layer between the sensing unit 200 and the second substrate 520 on which the second electrode unit 120 is formed may be an adhesive layer including an anisotropic conductive adhesive layer or a carbon micro-coil. However, the present invention is not limited thereto. However, the adhesive layer does not necessarily exist between the layers in FIGS. 12 to 14. As described above, when the electrode 101 is formed on the substrate portion 500, The sensing unit 200 may be attached to the second substrate 500 on which the second electrode unit 120 is formed by printing the conductive ink on the substrate unit 500 and curing the sensing unit 200. Alternatively, It is possible to print and cure the toner on the photoconductor 520.

The flexible touch panel 1 of the present invention includes a carbon micro-coil tactile sensor module 10 for a touch panel, and the flexible touch panel 1 is positioned below the flexible display panel. FIG. 19 shows an embodiment of such a flexible touch panel 1. The flexible display panel may be one selected from a liquid crystal display (LCD), an organic light emitting diode (OLED), and an electronic paper, but is not limited thereto. The flexible display panel is a well-known technology and is not a constituent element of the present invention, so a detailed description thereof will be omitted. The flexible touch panel 1 is particularly important in the warping of the substrate. The substrate that can be used for the flexible touch panel 1 is made of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide , PI, Cyclo-Olefin Polymer (COP), Polyethersulfone (PES), Polyether Ether Ketone (PEEK), PolyCarbonate (PC), Polyarylate , PAR), and silicone resin, but is not limited thereto. Indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or the like can be considered as the electrode 101 that can be used for the flexible touch panel 1, These transparent electrodes may crack during the repeated bending process. Therefore, it is preferable to use a metal such as a carbon nanotube (CNT), a graphene, a conductive polymer, a metal nanowire, gold, silver, And a flexible electrode prepared by mixing with a non-aqueous electrolyte. However, the present invention is not limited thereto.

The input touch sensing method of the carbon micro-coil tactile sensor module 10 for a touch panel of the present invention will be described below in each step. First, a driving signal is applied to the first electrode unit 110. The driving signal generator 600 can generate a driving signal to apply the driving signal to the first electrode unit 110 and the input touch sensing method uses the impedance change of the sensing unit 200, The alternating current may be an AC voltage source or an AC current source. The driving signal generator 600 may sequentially apply a driving signal to each row of the first electrode unit 110. For example, in a state where all the other rows are opened, a driving signal is applied to the first row So that the driving signal is transmitted to each coordinate of the first row and each coordinate of the first row transmits the sensing signal to each of the impedance measuring unit 300 through each column, The driving signal is applied to the second row, and the same process is performed for the remaining rows, so that the driving signal can be applied to all the coordinates. Also, the driving signal generator 600 may sequentially apply the driving signals in two rows. For example, similarly to the above, when driving signals are applied to the first row and the second row in a state where all the other rows are opened Next, the driving signal can be applied to the third row and the fourth row with all the other rows opened. In addition, the driving signal generator 600 can apply the driving signals to all the rows at the same time by varying the frequencies of the driving signals and the like. In addition, the driving signal generating unit 600 may apply driving signals to only one specific coordinate in a state in which all rows except for one row and one column and all other columns are opened. In addition, the shape of the driving signal may be a square wave or a triangle wave. That is, the method of applying the driving signal or the type of the driving signal may vary widely depending on the target signal processing method, and is not limited to any one of the signal processing methods.

Second, the sensing unit 200 senses an input touch input to a predetermined portion of the touch panel 1. The user can input a touch at an arbitrary position on the touch panel 1, and the sensing unit 200 to which the driving signal is applied can detect such an input touch. The sensing unit 200 senses an input touch and senses touch coordinates, touch pressure or touch coordinates and touch pressure. When the sensing unit 200 senses an input touch, the impedance of the sensing unit 200 changes Can happen.

Thirdly, the impedance measuring unit 300 measures the impedance of the coordinates of the sensing unit 200, or measures at least one of the resistance, inductance, and capacitance of the coordinates of the sensing unit 200 to generate an impedance signal. The impedance measuring unit 300 receives the sensing signal and outputs the impedance of the coordinate of the sensing unit 200 to the impedance measuring unit 300. The impedance measuring unit 300 receives the driving signal, Or at least one of the resistance, inductance, and capacitance of the coordinate of the sensing unit 200, and generates an impedance signal based on the measured resistance. This has been described above in (c) and (d) above. If the driving signal is applied to all the coordinates in the first step, the impedance signal is generated for all the coordinates. If the driving signal is applied to only one specific coordinate in the first step, the impedance signal for one or more specific coordinates is generated.

Fourth, the processor unit 400 processes the impedance signal to determine a touch coordinate pattern or a touch pressure pattern. The processor unit 400 may process the impedance signal to determine a touch coordinate pattern, a touch pressure pattern, or a touch coordinate pattern and a touch pressure pattern. For example, when the processor unit 400 receives an impedance signal related to the real part of the impedance of all the coordinates and converts the impedance signal to a digital signal as in (e), the change of the real part of the impedance It can be a method of determining the touch coordinate pattern with respect to the largest coordinate. Similarly, determining only the touch pressure pattern can be achieved, for example, when the processor unit 400 receives and converts an impedance signal relating to inductance changes of all coordinates into a digital signal, and then, for the coordinate with the largest inductance change, The touch pressure pattern corresponding to the inductance change may be determined. The determination of the touch coordinate pattern and the touch pressure pattern can be made by, for example, determining the touch coordinate pattern after fixing the touch coordinate pattern as in (e) above, or fixing the touch pressure pattern in the opposite order, It can be a way to confirm. The determination of the touch coordinate pattern and the touch pressure pattern will be described in the following embodiments.

[Example 1]

<Fabrication of carbon micro-coil tactile sensor module 10 for touch panel>

An organic vehicle comprising a silicone resin was prepared. Then, 95 wt% of the organic vehicle and 5 wt% of carbon microcoil were kneaded to prepare a slurry. In addition, ten copper electrodes are regularly arranged in the x-axis direction, and the other ten copper electrodes insulated from each other are arranged in a constant y-axis direction, and the copper electrodes 20 One substrate on which the pads were formed was prepared. The tactile sensor was manufactured by printing the slurry on one substrate having 20 copper electrodes and curing the tactile sensor. The tactile sensor is a tactile sensor of 3 x 3 mm ² sheet type, and its plan view is shown in Fig. Referring to FIG. 1, the slurry is cured to form a sensing unit 200, the copper electrodes 20 correspond to the electrode unit 100, and one substrate corresponds to the substrate unit 500. An impedance analyzer (Agilent 4249A) was prepared in the impedance measuring unit 300 and connected to each electrode 101 of the tactile sensor. The impedance analyzer was connected to the computer of the processor 400. Also, (1, 1) to (10, 10) are specified for 100 coordinates formed by the intersection of the 20 electrodes 101. Then, the computer stores the reference data 710 as shown in Table 1 below.

Touch
location Touch coordinate pattern Touch
location Touch coordinates
pattern Touch
location Touch coordinates
pattern Touch
location Touch coordinates
pattern (1,1) (1,1) (3,6) (11, 110) (6,1) (110,1) (8, 6) (1000, 110) (1, 2) (1,10) (3,7) (11,111) (6,2) (110, 10) (8, 7) (1000, 111) (1,3) (1,11) (3,8) (11, 1000) (6,3) (110, 11) (8,8) (1000, 1000) (1,4) (1,100) (3,9) (11,1001) (6, 4) (110, 100) (8,9) (1000, 1001) (1,5) (1,101) (3, 10) (11,1010) (6, 5) (110, 101) (8,10) (1000, 1010) (1,6) (1,110) (4,1) (100,1) (6,6) (110, 110) (9, 1) (1001,1) (1,7) (1,111) (4,2) (100,10) (6,7) (110, 111) (9,2) (1001,10) (1,8) (1,1000) (4,3) (100,11) (6,8) (110, 1000) (9, 3) (1001, 11) (1,9) (1,1001) (4,4) (100,100) (6,9) (110, 1001) (9, 4) (1001, 100) (1,10) (1,1010) (4, 5) (100, 101) (6,10) (110, 1010) (9, 5) (1001, 101) (2,1) (10, 1) (4,6) (100, 110) (7,1) (111, 1) (9, 6) (1001, 110) (2,2) (10,10) (4,7) (100,111) (7,2) (111, 10) (9, 7) (1001, 111) (2,3) (10,11) (4,8) (100, 1000) (7,3) (111, 11) (9,8) (1001, 1000) (2,4) (10,100) (4,9) (100,1001) (7, 4) (111, 100) (9, 9) (1001, 1001) (2,5) (10,101) (4,10) (100,1010) (7, 5) (111, 101) (9, 10) (1001, 1010) (2,6) (10, 110) (5, 1) (101,1) (7, 6) (111, 110) (10, 1) (1010,1) (2,7) (10,111) (5,2) (101,10) (7, 7) (111, 111) (10, 2) (1010,10) (2,8) (10, 1000) (5,3) (101,11) (7,8) (111, 1000) (10, 3) (1010,11) (2,9) (10,1001) (5, 4) (101,100) (7, 9) (111, 1001) (10,4) (1010,100) (2,10) (10,1010) (5, 5) (101, 101) (7, 10) (111, 1010) (10,5) (1010, 101) (3, 1) (11, 1) (5,6) (101, 110) (8, 1) (1000,1) (10, 6) (1010, 110) (3,2) (11,10) (5,7) (101, 111) (8,2) (1000, 10) (10,7) (1010, 111) (3,3) (11, 11) (5,8) (101, 1000) (8,3) (1000, 11) (10,8) (1010, 1000) (3,4) (11,100) (5,9) (101,1001) (8,4) (1000, 100) (10, 9) (1010, 1001) (3,5) (11,101) (5, 10) (101, 1010) (8, 5) (1000, 101) (10,10) (1010, 1010)

Also, another reference data 710 is stored in the computer by inputting the following Table 2.

Touch pressure (applied load) Inductance change Touch pressure pattern Less than 20gf Less than x ₂ One 20gf or more and less than 40gf x ₂ or more x _{3 or} less 10 40gf or more and less than 60gf x ₃ or more x _{4 or} less 11 60gf or more and less than 80gf x ₄ or more x less than ₅ 100 80gf or more and less than 100gf x ₅ or more x less than ₆ 101 100gf or more and less than 120gf x ₆ or more x less than ₇ 110 120gf or more and less than 140gf x ₇ or more x _{8 or} less 111 140gf or more and less than 160gf x ₈ or more x less than ₉ 1000 160gf or more and less than 180gf x ₉ or more x less than ₁₀ 1001 180gf or more X ₁₀ or more 1010

The touch coordinate is determined only when the real part of the impedance is equal to or greater than the reference value x _{1 in} FIG. 3, and the touch coordinate pattern is output. In order to implement the touch pressure sensing of the 10th step of the touch pressure step shown in FIG. 20, when even when 15 reference value x ₂ is less than a, x ₂ or more x ₃ is less than x _3, when more than x ₄ below, x ₄ over x time less than _5, x ₅ when more than x ₆ below, x ₆ as above x ₇ below, x ₇ x ₈ over time is less than, more than x when x _{8 9} below, more than ₉ x x ₁₀ x ₁₀ or higher and lower than when the time was programmed to output a respective touch pressure pattern.

<Confirmation of Touch Coordinate Pattern and Touch Pressure Pattern>

An acrylic having 100 coordinate points is placed on the tactile sensor of the manufactured carbon micro-coil tactile sensor module 10, and an arbitrary one of the coordinates displayed on the acrylic is touched. Then, Respectively. Then, the impedance analyzer outputs the real part of the impedance of each coordinate, and as a result, the touch coordinate pattern is outputted. For example, when (4,3) is touched as shown in Fig. 20, (100,11) is output. Also, it was confirmed that two or more touch coordinate patterns are output even when arbitrary two or more coordinates are touched. For example, the coordinates (4,3) and (3,3) shown in FIG. 1 are touched to output (100,11) and (11,11). Also, a load was applied to a certain area of a specific coordinate, an AC voltage was applied to the coordinates, and all the remaining electrodes were opened. The impedance analyzer then outputs the change in inductance for a particular coordinate. As a result, it was confirmed that the corresponding touch pressure pattern was output according to the applied load. For example, when the touch pressure pattern 1 is constantly output when a load of less than 20 gf is applied to (4,3) as shown in Fig. 20, and when a load of 20 gf or more and less than 40 gf is applied to (4,3) The touch pressure pattern 10 was outputted. When a load of less than 60 gf was applied to (4,3), a touch pressure pattern 11 was constantly outputted. When a load of less than 80 gf was applied to (4,3) , The touch pressure pattern 101 was output constantly when a load of less than 100 gf was applied to (4, 3), and when a load less than 120 gf was applied to (4, 3) The touch pressure pattern 110 was output. When a load of less than 140 gf was applied to (4,3), a touch pressure pattern 111 was constantly output. When a load of less than 160 gf was applied to (4,3) The touch pressure pattern 1000 is output, and a load of 160 gf or more and less than 180 gf is applied to (4, 3) Here a constant pressure touch pattern 1001 has been output, the constant pressure touch pattern 1010 has an output applied to let the load over 180gf to (4,3).

[Example 2]

<Fabrication of carbon micro-coil tactile sensor module 10 for touch panel>

An organic vehicle comprising a silicone resin was prepared. Then, 95 wt% of the organic vehicle and 5 wt% of carbon microcoil were kneaded to prepare a slurry. In addition, ten copper electrodes are regularly arranged in the x-axis direction, and the other ten copper electrodes insulated from each other are arranged in a constant y-axis direction, and the copper electrodes 20 One substrate on which the pads were formed was prepared. The tactile sensor was fabricated by printing and curing the slurry at each point where the copper electrode 20 crossed on one substrate with 20 copper electrodes formed thereon. The tactile sensor was composed of a 10 × 10 array and a 3 × 3 mm ² sheet As a tactile sensor, its plan view is shown in Fig. 11, the slurry is cured to form 100 units and a sensing unit 200. Twenty copper electrodes correspond to the electrode unit 100, and one substrate includes a substrate 500, . An impedance analyzer (Agilent 4249A) was prepared in the impedance measuring unit 300 and connected to each electrode 101 of the tactile sensor. The impedance analyzer was connected to the computer of the processor 400. Also, (1, 1) to (10, 10) are specified for 100 coordinates formed by the intersection of the 20 electrodes 101. Table 3 is entered into the computer by reference data 710 and stored.

Touch
location Touch coordinate pattern Touch
location Touch coordinates
pattern Touch
location Touch coordinates
pattern Touch
location Touch coordinates
pattern (1,1) (1,1) (3,6) (11, 110) (6,1) (110,1) (8, 6) (1000, 110) (1, 2) (1,10) (3,7) (11,111) (6,2) (110, 10) (8, 7) (1000, 111) (1,3) (1,11) (3,8) (11, 1000) (6,3) (110, 11) (8,8) (1000, 1000) (1,4) (1,100) (3,9) (11,1001) (6, 4) (110, 100) (8,9) (1000, 1001) (1,5) (1,101) (3, 10) (11,1010) (6, 5) (110, 101) (8,10) (1000, 1010) (1,6) (1,110) (4,1) (100,1) (6,6) (110, 110) (9, 1) (1001,1) (1,7) (1,111) (4,2) (100,10) (6,7) (110, 111) (9,2) (1001,10) (1,8) (1,1000) (4,3) (100,11) (6,8) (110, 1000) (9, 3) (1001, 11) (1,9) (1,1001) (4,4) (100,100) (6,9) (110, 1001) (9, 4) (1001, 100) (1,10) (1,1010) (4, 5) (100, 101) (6,10) (110, 1010) (9, 5) (1001, 101) (2,1) (10, 1) (4,6) (100, 110) (7,1) (111, 1) (9, 6) (1001, 110) (2,2) (10,10) (4,7) (100,111) (7,2) (111, 10) (9, 7) (1001, 111) (2,3) (10,11) (4,8) (100, 1000) (7,3) (111, 11) (9,8) (1001, 1000) (2,4) (10,100) (4,9) (100,1001) (7, 4) (111, 100) (9, 9) (1001, 1001) (2,5) (10,101) (4,10) (100,1010) (7, 5) (111, 101) (9, 10) (1001, 1010) (2,6) (10, 110) (5, 1) (101,1) (7, 6) (111, 110) (10, 1) (1010,1) (2,7) (10,111) (5,2) (101,10) (7, 7) (111, 111) (10, 2) (1010,10) (2,8) (10, 1000) (5,3) (101,11) (7,8) (111, 1000) (10, 3) (1010,11) (2,9) (10,1001) (5, 4) (101,100) (7, 9) (111, 1001) (10,4) (1010,100) (2,10) (10,1010) (5, 5) (101, 101) (7, 10) (111, 1010) (10,5) (1010, 101) (3, 1) (11, 1) (5,6) (101, 110) (8, 1) (1000,1) (10, 6) (1010, 110) (3,2) (11,10) (5,7) (101, 111) (8,2) (1000, 10) (10,7) (1010, 111) (3,3) (11, 11) (5,8) (101, 1000) (8,3) (1000, 11) (10,8) (1010, 1000) (3,4) (11,100) (5,9) (101,1001) (8,4) (1000, 100) (10, 9) (1010, 1001) (3,5) (11,101) (5, 10) (101, 1010) (8, 5) (1000, 101) (10,10) (1010, 1010)

Also, another reference data 710 is stored in the computer by inputting the following table 4.

Touch pressure (applied load) Inductance change Touch pressure pattern Less than 20gf Less than x ₂ One 20gf or more and less than 40gf x ₂ or more x _{3 or} less 10 40gf or more and less than 60gf x ₃ or more x _{4 or} less 11 60gf or more and less than 80gf x ₄ or more x less than ₅ 100 80gf or more and less than 100gf x ₅ or more x less than ₆ 101 100gf or more and less than 120gf x ₆ or more x less than ₇ 110 120gf or more and less than 140gf x ₇ or more x _{8 or} less 111 140gf or more and less than 160gf x ₈ or more x less than ₉ 1000 160gf or more and less than 180gf x ₉ or more x less than ₁₀ 1001 180gf or more X ₁₀ or more 1010

The touch coordinate is determined only when the real part of the impedance is equal to or greater than the reference value x _{1 in} FIG. 3, and the touch coordinate pattern is output. In order to implement the touch pressure sensing of the 10th step of the touch pressure step shown in FIG. 20, when even when 15 reference value x ₂ is less than a, x ₂ or more x ₃ is less than x _3, when more than x ₄ below, x ₄ over x time less than _5, x ₅ when more than x ₆ below, x ₆ as above x ₇ below, x ₇ x ₈ over time is less than, more than x when x _{8 9} below, more than ₉ x x ₁₀ x ₁₀ or higher and lower than when the time was programmed to output a respective touch pressure pattern.

<Confirmation of Touch Coordinate Pattern and Touch Pressure Pattern>

An acrylic having 100 coordinate points is placed on the tactile sensor of the manufactured carbon micro-coil tactile sensor module 10, and an arbitrary one of the coordinates displayed on the acrylic is touched. Then, Respectively. Then, the impedance analyzer outputs the real part of the impedance of each coordinate, and as a result, the touch coordinate pattern is outputted. For example, when (4,3) is touched as shown in Fig. 20, (100,11) is output. Also, it was confirmed that two or more touch coordinate patterns are output even when arbitrary two or more coordinates are touched. For example, the coordinates (4,3) and (3,3) shown in Fig. 11 are touched to output (100,11) and (11,11). Also, a load was applied to a certain area of a specific coordinate, an AC voltage was applied to the coordinates, and all the remaining electrodes were opened. The impedance analyzer then outputs the change in inductance for a particular coordinate. As a result, it was confirmed that the corresponding touch pressure pattern was output according to the applied load. For example, when the touch pressure pattern 1 is constantly output when a load of less than 20 gf is applied to (4,3) as shown in Fig. 20, and when a load of 20 gf or more and less than 40 gf is applied to (4,3) The touch pressure pattern 10 was outputted. When a load of less than 60 gf was applied to (4,3), a touch pressure pattern 11 was constantly outputted. When a load of less than 80 gf was applied to (4,3) , The touch pressure pattern 101 was output constantly when a load of less than 100 gf was applied to (4, 3), and when a load less than 120 gf was applied to (4, 3) The touch pressure pattern 110 was output. When a load of less than 140 gf was applied to (4,3), a touch pressure pattern 111 was constantly output. When a load of less than 160 gf was applied to (4,3) The touch pressure pattern 1000 is output, and a load of 160 gf or more and less than 180 gf is applied to (4, 3) Here a constant pressure touch pattern 1001 has been output, the constant pressure touch pattern 1010 has an output applied to let the load over 180gf to (4,3).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it should be understood that various changes and modifications will be apparent to those skilled in the art. Obviously, the invention is not limited to the embodiments described above. Accordingly, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which fall within the scope of equivalence by alteration, substitution, substitution, Range. In addition, it should be clarified that some configurations of the drawings are intended to explain the configuration more clearly and are provided in an exaggerated or reduced size than the actual configuration.

1: Touch panel, flexible touch panel
10: Carbon micro-coil tactile sensor module for touch panel
100:
110: first electrode portion
120: second electrode portion
101: Electrode
200:
300: Impedance measuring unit
400:
500: substrate portion
510: a first substrate
520: second substrate
600: driving signal generating unit
700:
710: Reference data

Claims (12)

In a smart device,
A first substrate 510;
A first electrode unit 110 formed on the first substrate 510 in a first axis direction;
A plurality of sensing units located above the first electrode unit 110 and each including 6 to 10 wt% carbon microcoils based on the total weight;
A second electrode part 120 located on the sensing unit and formed in a second axis direction perpendicular to the first axis direction;
A display panel having the second electrode unit 120 formed on a lower portion thereof;
A driving signal generator 600 positioned below the display panel and applying a driving signal to the first electrode unit 110;
A capacitance measuring unit 300 located at a lower portion of the display panel and measuring a capacitance change of the sensing unit according to a touch inputted to the surface of the display panel to generate a capacitance signal;
A processor unit 400 located at a lower portion of the display panel and processing the capacitance signal generated by the capacitance measuring unit 300 to determine a touch coordinate pattern and a touch pressure pattern; And
A storage unit 700 in which a predetermined touch coordinate pattern code located at a lower portion of the display panel and contrasted with the touch coordinate pattern by the processor unit 400 and a predetermined touch pressure pattern code in contrast to the touch pressure pattern are recorded, ),
Wherein each of the plurality of sensing units is positioned on each coordinate in a plane coordinate system formed by intersecting the first electrode unit (110) and the second electrode unit (120);
The sensing unit receives the driving signal through the first electrode unit 110 and outputs a sensing signal through the second electrode unit 120;
The capacitance measuring unit 300 measures the capacitance change of the sensing unit by receiving the output sensing signal;
The processor unit 400 determines the touch coordinate pattern corresponding to the touch coordinates by determining coordinates of the sensing unit having the largest capacitance change among the plurality of sensing units as touch coordinates;
The processor unit 400 compares the determined touch coordinate pattern with the predetermined touch coordinate pattern code and gives the touch coordinate pattern code to the determined touch coordinate pattern;
The processor unit 400 determines the touch pressure pattern corresponding to the capacitance change amount of the largest sensing unit having the largest capacitance change;
The processor unit 400 provides the touch pressure pattern code to the determined touch pressure pattern by comparing the determined touch pressure pattern with the predetermined touch pressure pattern code;
Wherein the smart device executes a function corresponding to the touch coordinate pattern code and the touch pressure pattern code.
delete The method according to claim 1,
Wherein the carbon micro-coil has a three-dimensional spiral shape and has a diameter of 1 to 10 micrometers and a length of 10 to 500 micrometers.
The method according to claim 1,
Wherein the carbon micro-coil has a diameter of 0.01 to 1 micrometer in diameter of the carbon fibers forming the coil.
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