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WO2018135840A1 - Dispositif d'entrée tactile - Google Patents

Dispositif d'entrée tactile Download PDF

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Publication number
WO2018135840A1
WO2018135840A1 PCT/KR2018/000752 KR2018000752W WO2018135840A1 WO 2018135840 A1 WO2018135840 A1 WO 2018135840A1 KR 2018000752 W KR2018000752 W KR 2018000752W WO 2018135840 A1 WO2018135840 A1 WO 2018135840A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
layer
fpcb
display panel
pressure
Prior art date
Application number
PCT/KR2018/000752
Other languages
English (en)
Korean (ko)
Inventor
김세엽
김본기
조영호
Original Assignee
주식회사 하이딥
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 하이딥 filed Critical 주식회사 하이딥
Publication of WO2018135840A1 publication Critical patent/WO2018135840A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0094—Shielding materials being light-transmitting, e.g. transparent, translucent
    • H05K9/0096—Shielding materials being light-transmitting, e.g. transparent, translucent for television displays, e.g. plasma display panel
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds

Definitions

  • the present invention relates to a touch input device. More particularly, the present invention is to effectively block noise generated in the touch input device by disposing a separate layer for implementing the reference potential layer.
  • input devices are used for the operation of the computing system.
  • input devices such as buttons, keys, joysticks, and touch screens are used. Due to the easy and simple operation of the touch screen, the use of the touch screen is increasing in the operation of the computing system.
  • the touch screen may constitute a touch surface of a touch input device that includes a touch sensor panel, which may be a transparent panel having a touch-sensitive surface. Such a touch sensor panel may be attached to the front of the display screen such that the touch-sensitive surface covers the visible side of the display screen. By simply touching the touch screen with a finger or the like, the user can operate the computing system. In general, a computing system may recognize a touch and a touch location on a touch screen and interpret the touch to perform the calculation accordingly.
  • a touch input device capable of detecting a pressure level of a touch as well as a touch position according to a touch on a touch screen without degrading the performance of the display module.
  • a capacitive pressure sensor is disposed on the lower surface of the display module, and the distance between the substrate positioned under the pressure sensor and serving as a reference potential Accordingly, a touch input device having a structure for detecting pressure has been developed. At this time, a part of the FPCB in which the touch or display circuit is implemented is located between the pressure sensor and the substrate. Since the FPCB is disposed between the pressure sensor and the reference potential layer, the problem of inferior pressure detection sensitivity of the region is solved. Necessity is emerging.
  • Another object of the present invention is to improve the pressure detection sensitivity by implementing a pressure detection module including a separate reference potential layer below the display panel.
  • a display panel a substrate disposed spaced apart from the display panel by a predetermined distance, at least one pressure sensor disposed between the display panel and the substrate for detecting a touch pressure;
  • a flexible printed circuit board connected to the display panel, wherein a reference potential layer, which is a reference for detecting the touch pressure, is disposed between the at least one pressure sensor and the FPCB. Characterized in that the touch input device.
  • a touch input device comprising: a display panel, a substrate disposed spaced apart from the display panel by a predetermined distance, at least one pressure sensor disposed between the display panel and the substrate to detect touch pressure, and the display And a flexible printed circuit board (FPCB) connected to the panel, wherein the at least one pressure sensor is a touch input device disposed between the FPCB and a reference potential layer serving as a reference for detecting the touch pressure.
  • FPCB flexible printed circuit board
  • a touch input device comprising: a display panel, a substrate disposed to be spaced apart from the display panel by a predetermined distance, disposed between the display panel and the substrate, an insulating layer, and a touch pressure disposed on the insulating layer.
  • a pressure detection module including at least one pressure sensor for detecting a pressure and a reference potential layer disposed to face the at least one pressure sensor, and a flexible printed circuit board (FPCB) connected to the display panel;
  • the pressure detection module may be a touch input device disposed between the display panel and the FPCB.
  • a smart phone including a display module that can detect the position of the touch on the touch screen as well as the size of the touch pressure.
  • a smartphone including a display module, which is configured to detect a touch position and a magnitude of pressure of the touch without degrading the visibility and the light transmittance of the display module.
  • Another object of the present invention is to arrange a separate layer for implementing the reference potential layer, it is possible to effectively block the noise generated in the touch input device.
  • FIG. 1 is a schematic diagram of a capacitive touch sensor according to an embodiment of the present invention and a configuration for its operation.
  • FIGS. 2A to 2F are conceptual views illustrating a relative position of a touch sensor with respect to a display module in a touch input device according to an embodiment of the present invention.
  • FIG 3 is a cross-sectional view of a touch input device configured to detect touch pressure according to an embodiment of the present invention.
  • FIG 4 and 6 illustrate the relative distance between the pressure sensor included in the touch input device according to the embodiment of the present invention and the reference potential layer.
  • FIG. 5 illustrates an attachment structure of a pressure sensor according to an embodiment of the present invention.
  • FIG. 7 and 8 are views illustrating a form of a pressure sensor included in a touch input device according to an embodiment of the present invention.
  • the touch sensor 10 includes a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm, and a plurality of driving electrodes for operation of the touch sensor 10. Touch by receiving a detection signal including information on the capacitance change according to the touch on the touch surface from the driving unit 12 for applying a driving signal to the TX1 to TXn, and the plurality of receiving electrodes (RX1 to RXm) And a detector 11 for detecting a touch position.
  • the touch sensor 10 may include a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm.
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm of the touch sensor 10 form an orthogonal array, the present invention is not limited thereto.
  • the electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may have any number of dimensions and application arrangements thereof, including diagonal, concentric circles, and three-dimensional random arrangements.
  • n and m are positive integers and may have the same or different values, and may vary in size according to embodiments.
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be arranged to cross each other.
  • the driving electrode TX includes a plurality of driving electrodes TX1 to TXn extending in the first axis direction
  • the receiving electrode RX includes a plurality of receiving electrodes extending in the second axis direction crossing the first axis direction. RX1 to RXm).
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on the same layer.
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on an upper surface of the display module 200 which will be described later.
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on different layers.
  • any one of the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on an upper surface of the display module 200, and the other may be formed on a lower surface of a cover to be described later. It may be formed inside the (200).
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed of a transparent conductive material (eg, tin oxide (SnO 2 ), indium oxide (In 2 O 3 ), or the like. Oxide) or ATO (Antimony Tin Oxide).
  • a transparent conductive material eg, tin oxide (SnO 2 ), indium oxide (In 2 O 3 ), or the like. Oxide) or ATO (Antimony Tin Oxide).
  • the driving electrode TX and the receiving electrode RX may be formed of another transparent conductive material or an opaque conductive material.
  • the driving electrode TX and the receiving electrode RX may include at least one of silver ink, copper, silver silver, and carbon nanotubes (CNT). Can be.
  • the driving electrode TX and the receiving electrode RX may be implemented with a metal mesh.
  • the driving unit 12 may apply a driving signal to the driving electrodes TX1 to TXn.
  • the driving signal may be applied to one driving electrode at a time from the first driving electrode TX1 to the nth driving electrode TXn in sequence.
  • the driving signal may be repeatedly applied again. This is merely an example, and a driving signal may be simultaneously applied to a plurality of driving electrodes in some embodiments.
  • the sensing unit 11 provides information about the capacitance Cm 101 generated between the driving electrodes TX1 to TXn to which the driving signal is applied and the receiving electrodes RX1 to RXm through the receiving electrodes RX1 to RXm.
  • the sensing signal may be a signal in which the driving signal applied to the driving electrode TX is coupled by the capacitance Cm 101 generated between the driving electrode TX and the receiving electrode RX.
  • a process of sensing the driving signals applied from the first driving electrode TX1 to the nth driving electrode TXn through the receiving electrodes RX1 to RXm may be referred to as scanning the touch sensor 10. Can be.
  • the detector 11 may include a receiver (not shown) connected to each of the reception electrodes RX1 to RXm through a switch.
  • the switch is turned on in a time interval for detecting the signal of the corresponding receiving electrode RX, so that the detection signal from the receiving electrode RX can be detected at the receiver.
  • the receiver may comprise an amplifier (not shown) and a feedback capacitor coupled between the negative input terminal of the amplifier and the output terminal of the amplifier, i.e., in the feedback path. At this time, the positive input terminal of the amplifier may be connected to ground.
  • the receiver may further include a reset switch connected in parallel with the feedback capacitor. The reset switch may reset the conversion from current to voltage performed by the receiver.
  • the negative input terminal of the amplifier may be connected to the corresponding receiving electrode RX to receive a current signal including information on the capacitance Cm 101 and then integrate and convert the current signal into a voltage.
  • the sensor 11 may further include an analog to digital converter (ADC) for converting data integrated through a receiver into digital data. Subsequently, the digital data may be input to a processor (not shown) and processed to obtain touch information about the touch sensor 10.
  • the detector 11 may include an ADC and a processor.
  • the controller 13 may perform a function of controlling the operations of the driver 12 and the detector 11. For example, the controller 13 may generate a driving control signal and transmit the driving control signal to the driving unit 12 so that the driving signal is applied to the predetermined driving electrode TX at a predetermined time. In addition, the control unit 13 generates a detection control signal and transmits the detection control signal to the detection unit 11 so that the detection unit 11 receives a detection signal from a predetermined reception electrode RX at a predetermined time to perform a preset function. can do.
  • the driver 12 and the detector 11 may configure a touch detection device (not shown) capable of detecting whether the touch sensor 10 is touched and the touch position.
  • the touch detection apparatus may further include a controller 13.
  • the touch detection apparatus may be integrated and implemented on a touch sensing integrated circuit (IC), which is a touch sensing circuit, in the touch input device including the touch sensor 10.
  • IC touch sensing integrated circuit
  • the driving electrode TX and the receiving electrode RX included in the touch sensor 10 are included in the touch sensing IC through, for example, conductive traces and / or conductive patterns printed on a circuit board. It may be connected to the driving unit 12 and the sensing unit 11.
  • the touch sensing IC may be located on a circuit board on which a conductive pattern is printed, for example, a first printed circuit board (hereinafter, referred to as a first FPCB). According to an embodiment, the touch sensing IC may be mounted on a main board for operating the touch input device.
  • a first FPCB first printed circuit board
  • a capacitance Cm having a predetermined value is generated at each intersection point of the driving electrode TX and the receiving electrode RX, and such capacitance when an object such as a finger approaches the touch sensor 10.
  • the value of can be changed.
  • the capacitance may represent mutual capacitance (Cm).
  • the electrical characteristics may be detected by the sensing unit 11 to detect whether the touch sensor 10 is touched and / or the touch position. For example, the touch and / or the position of the touch on the surface of the touch sensor 10 formed of the two-dimensional plane including the first axis and the second axis may be sensed.
  • the position of the touch in the second axis direction may be detected by detecting the driving electrode TX to which the driving signal is applied.
  • the position of the touch in the first axis direction can be detected by detecting a change in capacitance from the received signal received through the receiving electrode RX when the touch sensor 10 is touched.
  • the operation method of the touch sensor 10 that detects the touch position has been described based on the mutual capacitance change amount between the driving electrode TX and the receiving electrode RX, but the present invention is not limited thereto. That is, as shown in FIG. 1B, the touch position may be sensed based on the amount of change in self capacitance.
  • FIG. 1B is a schematic diagram illustrating another capacitive touch sensor 10 included in a touch input device according to another embodiment of the present invention, and an operation thereof.
  • the touch sensor 10 illustrated in FIG. 1B includes a plurality of touch electrodes 30.
  • the plurality of touch electrodes 30 may be disposed in a lattice shape at regular intervals, but is not limited thereto.
  • the driving control signal generated by the controller 130 is transmitted to the driving unit 12, and the driving unit 12 applies the driving signal to the touch electrode 30 preset at a predetermined time based on the driving control signal.
  • the sensing control signal generated by the controller 13 is transmitted to the sensing unit 11, and the sensing unit 11 receives the sensing signal from the touch electrode 30 preset at a predetermined time based on the sensing control signal.
  • Receive input In this case, the detection signal may be a signal for the change amount of the magnetic capacitance formed in the touch electrode 30.
  • the driving unit 12 and the sensing unit 11 are described as being divided into separate blocks, but the driving signal is applied to the touch electrode 30 and the sensing signal is input from the touch electrode 30. It is also possible to perform in one driving and sensing unit.
  • the control block includes a touch sensor controller 1100 for detecting the aforementioned touch position and a display controller for driving the display panel. 1200 and a pressure sensor controller 1300 for detecting pressure.
  • the display controller 1200 receives input from a central processing unit (CPU), an application processor (AP), or the like, which is a central processing unit on a main board for operating the touch input device 1000, to the display panel 200A. It may include a control circuit to display the desired content.
  • the display controller 1200 may be mounted on a second printed circuit board (hereinafter, referred to as a second FPCB).
  • a control circuit may be a circuit necessary for operating a display panel control IC, a graphic controller IC, and other display panels 200A.
  • the pressure sensor controller 1300 for detecting pressure through the pressure sensor may be configured similar to the configuration of the touch sensor controller 1100 to operate similarly to the touch sensor controller 1100.
  • the pressure sensor controller 1300 may include a driving unit, a sensing unit, and a control unit, and detect the magnitude of the pressure by a sensing signal detected by the sensing unit.
  • the pressure sensor controller 1300 may be mounted on a touch FPCB (hereinafter, referred to as a first FPCB) in which the touch sensor controller 1100 is mounted, or may be mounted on a second FPCB in which the display controller 1200 is mounted. It may be.
  • the touch sensor controller 1100, the display controller 1200, and the pressure sensor controller 1300 may be included in the touch input device 1000 as different components.
  • the touch sensor controller 1100, the display controller 1200, and the pressure sensor controller 1300 may be implemented with different chips.
  • the processor 1500 of the touch input device 1000 may function as a host processor for the touch sensor controller 1100, the display controller 1200, and the pressure sensor controller 1300.
  • the touch input device 1000 may be a cell phone, a personal data assistant (PDA), a smartphone, a tablet PC, an MP3 player, a notebook, or the like. It may include an electronic device including the same display screen and / or a touch screen.
  • PDA personal data assistant
  • smartphone a tablet PC
  • MP3 player a notebook
  • notebook or the like. It may include an electronic device including the same display screen and / or a touch screen.
  • the touch sensor controller 1100, the display controller 1200, and the pressure sensor controller 1300 which are separately configured as described above, are manufactured. Can be integrated into one or more configurations, depending on the embodiment. In addition, each of these controllers may be integrated into the processor 1500. In addition, the touch sensor 10 and / or the pressure sensor may be integrated in the display panel 200A according to an exemplary embodiment.
  • the touch sensor 10 for detecting a touch position may be located outside or inside the display panel 200A.
  • the display panel 200A of the touch input device 1000 according to the embodiment is included in a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED), and the like. It may be a display panel. Accordingly, the user may perform an input operation by performing a touch on the touch surface while visually confirming the screen displayed on the display panel.
  • FIG. 2A and 2B are conceptual views illustrating a configuration of the display module 200 in the touch input device 1000 according to the present invention.
  • FIG. 2A a configuration of a display module 200 including a display panel 200A using an LCD panel will be described.
  • the display module 200 includes a display panel 200A, which is an LCD panel, a first polarization layer 271 disposed on the display panel 200A, and a display panel 200A disposed below the display panel 200A.
  • the polarizing layer 272 may be included.
  • the display panel 200A which is an LCD panel, includes a liquid crystal layer 250 including a liquid crystal cell, a first substrate layer 261 and a liquid crystal layer 250 disposed on the liquid crystal layer 250. It may include a second substrate layer 262 disposed below.
  • the first substrate layer 261 may be a color filter glass
  • the second substrate layer 262 may be a TFT glass.
  • the first substrate layer 261 and the second substrate layer 262 may be formed of a bendable material such as plastic.
  • the second substrate layer 262 is formed of various layers including a data line, a gate line, a TFT, a common electrode (Vcom), a pixel electrode, and the like. Can be done. These electrical components can operate to produce a controlled electric field to orient the liquid crystals located in the liquid crystal layer 250.
  • the display module 200 may include a display panel 200A, which is an OLED panel, and a first polarization layer 282 disposed on the display panel 200A.
  • the display panel 200A which is an OLED panel, has an organic layer 280 including an organic light-emitting diode (OLED), a first substrate layer 281 disposed above the organic layer 280, and a lower portion of the organic layer 280.
  • the second substrate layer 283 may be disposed.
  • the first substrate layer 281 may be encapsulation glass
  • the second substrate layer 283 may be TFT glass.
  • at least one of the first substrate layer 281 and the second substrate layer 283 may be formed of a bendable material such as plastic.
  • OLED Organic Light-Emitting Diode
  • OLED Organic Light-Emitting Diode
  • OLED uses a principle that the organic material emits light when the organic material is applied to glass or plastic to flow electricity.
  • the organic material emits light when the organic material is applied to glass or plastic to flow electricity.
  • holes and electrons are injected into the anode and cathode of the organic material and recombined in the light emitting layer, excitons are formed in a high energy state, and energy is emitted as the excitons fall to a low energy state to emit light having a specific wavelength. Is to use the generated principle.
  • the color of light varies according to the organic material of the light emitting layer.
  • OLED is composed of line-driven passive-matrix organic light-emitting diode (PM-OLED) and individual-driven active-matrix organic light-emitting diode (AM-OLED) depending on the operating characteristics of the pixels constituting the pixel matrix.
  • PM-OLED passive-matrix organic light-emitting diode
  • AM-OLED active-matrix organic light-emitting diode
  • the PM-OLED emits light only during a scanning time at a high current
  • the AM-OLED maintains light emission during a frame time at a low current. Therefore, the AM-OLED has the advantages of better resolution, greater area display panel driving, and lower power consumption than PM-OLED.
  • each device can be individually controlled by embedding a thin film transistor (TFT), so it is easy to realize a sophisticated screen.
  • TFT thin film transistor
  • the organic material layer 280 may include a HIL (Hole Injection Layer), a HTL (Hole Transfer Layer), an EIL (Emission Material Layer), an ETL (Electron Transfer Layer), and an EML. (Electron Injection Layer, light emitting layer) may be included.
  • HIL Hole Injection Layer
  • HTL Hole Transfer Layer
  • EIL emission Material Layer
  • ETL Electrode Transfer Layer
  • EML Electrometic Injection Layer, light emitting layer
  • HIL injects holes, using a material such as CuPc.
  • HTL functions to move the injected holes, and mainly uses materials having good hole mobility.
  • EIL and ETL are layers for the injection and transport of electrons, and the injected electrons and holes combine and emit light in the EML.
  • EML is a material expressing the color emitted, and is composed of a host that determines the lifetime of the organic material and a dopant that determines the color and efficiency. This is merely to describe the basic configuration of the organic material layer 280 included in the OLED panel, the present invention is not limited to the layer structure or material of the organic material layer 280.
  • the organic layer 280 is inserted between an anode (not shown) and a cathode (not shown).
  • a driving current is applied to the anode to inject holes, and the cathode is injected into the cathode. Electrons are injected, and holes and electrons move to the organic layer 280 to emit light.
  • the LCD panel or OLED panel may further include other configurations and may be modified to perform display functions.
  • the display module 200 of the touch input device 1000 may include a configuration for driving the display panel 200A and the display panel 200A.
  • the display module 200 may include a backlight unit (not shown) disposed below the second polarization layer 272, and may include an LCD panel. It may further include a display panel control IC, a graphic control IC and other circuitry for the operation of.
  • the display module 200 when the display module 200 is implemented as a flexible active-matrix organic light-emitting diode (AM-OLED) according to an embodiment of the present invention, at least one of the first substrate layer and the second substrate layer may be formed of a plastic material.
  • the plastic material is used to provide excellent resilience, impact resistance, and thinness and lightness. At this time, it may be implemented in the form of a film of polyamide (Polyimide) material.
  • the touch sensor according to the embodiment of the present invention is used to determine the magnitude of the pressure of the touch along with the presence and / or position of the touch. It can also be detected. It is also possible to further include a pressure sensor for detecting the touch pressure separately from the touch sensor to detect the pressure magnitude of the touch.
  • the pressure sensors 450 and 460 and the touch input device including the same will be described in detail.
  • 3A to 3E illustrate an example in which the pressure sensors 450 and 460 are applied to the touch input device according to the present invention.
  • an adhesive such as OCA (Optically Clear Adhesive) is formed between the cover layer 100 on which a touch sensor for detecting a touch position is formed and the display module 200 including the display panel 200A. It may be laminated. Accordingly, display color clarity, visibility, and light transmittance of the display module 200 which can be checked through the touch surface of the touch sensor may be improved.
  • OCA Optically Clear Adhesive
  • the display panel 200A is directly attached and laminated to the cover layer 100 in FIGS. 3A and some drawings below, this is merely for convenience of explanation and the first polarization layers 271 and 282 are the display panel 200A.
  • the upper display module 200 may be laminated and attached to the cover layer 100.
  • the LCD panel is the display panel 200A, the second polarizing layer 272 and the backlight unit are omitted.
  • a cover layer 100 having a touch sensor as a touch input device 1000 according to an embodiment of the present invention is disposed on the display module 200 shown in FIGS. 3A and 3B.
  • An example of lamination with an adhesive is illustrated, but the touch input device 1000 according to an exemplary embodiment of the present invention may include a case in which the touch sensor 10 is disposed inside the display module 200 illustrated in FIGS. 3A and 3B. can do.
  • the cover layer 100 on which the touch sensor is formed covers the display module 200 including the display panel 200A.
  • the touch sensor 10 may include the display module 200.
  • the touch input device 1000 disposed inside and covered with the cover layer 100 such as glass may be used as an exemplary embodiment of the present invention.
  • the touch input device 1000 may be a cell phone, a personal data assistant (PDA), a smartphone, a tablet PC, an MP3 player, a notebook, or the like. It may include an electronic device including the same touch screen.
  • PDA personal data assistant
  • smartphone a tablet PC
  • MP3 player a notebook
  • notebook a notebook
  • the substrate 300 may be, for example, a circuit board for operating the touch input device 1000 together with the housing 320 which is the outermost mechanism of the touch input device 1000. And / or wrap the mounting space 310 in which the battery may be located.
  • a circuit board for operating the touch input device 1000 may be mounted with a central processing unit (CPU) or an application processor (AP) as a main board.
  • CPU central processing unit
  • AP application processor
  • the circuit board and / or the battery for the operation of the display module 200 and the touch input device 1000 are separated through the substrate 300, and the electrical noise generated from the display module 200 and the noise generated from the circuit board Can be blocked.
  • the touch sensor 10 or the cover layer 100 may be formed wider than the display module 200, the substrate 300, and the mounting space 310, and thus the housing 320 may be formed.
  • the housing 320 may be formed to surround the display module 200, the substrate 300, and the circuit board together with the touch sensor 10.
  • the touch input device 1000 may detect the touch position through the touch sensor 10 and detect the touch pressure from the pressure sensors 450 and 460 formed under the display panel 200A.
  • the touch sensor 10 may be located inside or outside the display module 200.
  • the touch input device 1000 may include a spacer layer 420 and 420 '.
  • the spacer layers 420 and 420 ' may be made of an impact absorbing material according to an exemplary embodiment.
  • Spacer layers 420 and 420 ' may be filled with a dielectric material in accordance with embodiments.
  • the spacer layers 420 and 420 ' may be formed of a material having a recovery force that contracts upon application of pressure and returns to its original shape upon release of the pressure.
  • the spacer layer 420 may be formed of an elastic foam.
  • the spacer layers 420 and 420 ′ may include a first spacer layer 402 and a second spacer layer 420 ′ that are divided according to the arrangement of the reference potential layer 402 and the pressure sensors 420 and 460. have.
  • the reference potential layer 402 may be formed on the display panel 200A or the substrate 300 (not shown).
  • the first spacer layer 420 may be formed of the display panel 200A and the reference potential.
  • the substrate 300 may be formed between the substrate 300 embodied as a layer, or may be formed between the substrate 300 and the display panel 200A embodied as the reference potential layer.
  • the second spacer layer 420 ′ may be disposed between the reference potential layer 402 and the pressure sensors 450, 460.
  • the pressure sensors 450 and 460 may be made of an opaque material as well as a transparent material.
  • the pressure sensors 450 and 460 may be made of a transparent material such as ITO.
  • a frame 330 having a predetermined height may be formed along an edge of the upper portion of the substrate 300.
  • the frame 330 may be attached to the cover layer 100 with an adhesive tape (not shown).
  • the frame 330 is formed on all edges of the substrate 300 (eg, four sides of a quadrilateral), but the frame 330 is formed of at least a portion of the edge of the substrate 300 (eg, a quadrilateral). Only on three sides).
  • the frame 330 may be integrally formed with the substrate 300 on the upper surface of the substrate 300.
  • the frame 330 may be made of a material having no elasticity.
  • the display panel 200A when touch pressure is applied to the display panel 200A through the cover layer 100, the display panel 200A may be bent together with the cover layer 100, and thus the frame 330 may be exposed to pressure. Therefore, even if there is no deformation of the body, the magnitude of the touch pressure can be detected.
  • 3C is a cross-sectional view of a touch input device including pressure sensors 450 and 460 according to an embodiment of the present invention. As shown in FIG. 3C, the pressure sensors 450 and 460 according to the exemplary embodiment of the present invention may be formed on the lower surface of the display panel 200A.
  • 3D is a cross-sectional view when touch pressure is applied to the touch input device 1000 illustrated in FIG. 3C.
  • the upper surface of the substrate 300 may have a ground potential for noise shielding.
  • the cover layer 100 and the display panel 200A may be bent or pressed.
  • the display panel 200A may be bent or pressed in response to a touch applying a pressure.
  • the display panel 200A may be bent or pressed to indicate deformation according to a touch.
  • the position showing the largest deformation when the display panel 200A is bent or pressed may not coincide with the touch position, but the display panel 200A may indicate bending at least at the touch position.
  • the touch position is close to the edge and the edge of the display panel 200A, the position where the display panel 200A is bent or pressed the most may be different from the touch position, but the display panel 200A may be at least the touch position. It may indicate bending or pressing at.
  • a new reference potential layer may be needed due to the area of the second FPCB in which the display controller 1200 is mounted.
  • an area of the second FPCB may be at least 1/2 of the area of the display panel 200A.
  • the present invention is not applied only when the area of the second FPCB is 1/2 or more of the area of the display panel 200A. Even if the area of the second FPCB is 1/2 or less, the second FPCB is the pressure sensors 450 and 460 and the substrate ( It can be applied if the size is implemented to block the capacitance change according to the distance change between the reference potential layer of 300).
  • the pressure sensors 450 and 460 disposed below the display panel 200A may detect the pressure by using the reference potential layer of the substrate 300 positioned to face the display panel 200A. Since the second FPCB is disposed between the pressure sensors 450 and 460 and the substrate 300, the second FPCB blocks the change in capacitance due to the change in distance between the pressure sensors 450 and 460 and the reference potential layer, thereby lowering the pressure detection sensitivity. . Therefore, by implementing the pressure detection module 400 including a separate reference potential layer below the display panel 200A, the pressure detection sensitivity may be improved.
  • the pressure detection module 400 may be disposed between the display panel 200A and the substrate 300, and the pressure detection module 400 may include an insulating layer 470. ), At least one pressure sensor 450, 460 disposed on the insulating layer 470 to face the at least one pressure sensor 450, 460 for sensing touch pressure. It may include.
  • the insulating layer 470 is attached to the lower surface of the display panel 200A.
  • FIG. 4A the insulating layer 470 is attached to the lower surface of the display panel 200A.
  • the present invention is the same even when the insulating layer 470 is attached to the upper surface of the second FPCB. Can be applied.
  • the reference potential layer 402 may be disposed between the pressure sensors 450 and 460 and the second FPCB, but as shown in FIG. 4D.
  • the pressure sensors 450 and 460 may be disposed between the reference potential layer 402 and the second FPCB attached to the lower surface of the display panel 200A.
  • the pressure detection module 400 may be disposed between the display panel 200A and the second FPCB.
  • the module 400 further includes a shielding layer 401, so that the shielding layer 401 may be attached to the bottom surface of the display panel 470A or may be attached to the top surface of the second FPCB.
  • the shielding layer 401 may include a conductive material such as graphite or nickel to reduce noise.
  • the shielding layer 401 may reduce noise generated in the display panel 200A, and in FIG.
  • the shielding layer 401 may be removed from the second FPCB or the substrate 300. Noise generated can be reduced.
  • the pressure detection module 400 includes the shielding layer 401, the insulating layer 470 may be disposed on the shielding layer 401.
  • the pressure sensors 450 and 460 according to the embodiment include a first sensor 450 and a second sensor 460, and a first sensor.
  • a driving signal may be applied to the driving electrode TX, which is one of the sensor 450 and the second sensor 460, and a detection signal may be obtained through the receiving electrode RX, and the first sensor 450 may be applied according to the touch pressure.
  • the distance between the second sensor 460 and the reference potential layer 402 and the mutual capacitance change between the first sensor 450 and the second sensor 460 according to the distance change. Touch pressure can be detected.
  • the first sensor 450 and the reference potential layer 402 are changed according to the touch pressure, and the first sensor 450 and the reference according to the distance change are changed.
  • the touch pressure can be detected by a change in self capacitance between the potential layers 402.
  • the driving signal is applied to the first sensor 450 and the received signal is received from the first sensor 450 to detect the change in the capacitance of the magnetic capacitance between the first sensor 450 and the reference potential layer. Can be detected. Since the distance d decreases as the touch pressure increases, the capacitance between the reference potential layer and the first sensor 450 may increase as the touch pressure increases.
  • the second FPCB may be attached to the lower surface of the pressure detection module 400 and attached to the upper surface of the substrate 300.
  • a step may be generated between the substrate 300 and the pressure detection module 400 due to the thickness D of the second FPCB. Therefore, as shown in FIG. 4B, the second FPCB may be inserted into the upper portion of the substrate 300 to remove the step between the substrate 300 and the pressure detection module 400.
  • the groove 301 may be generated inside the substrate 300 by inserting the second FPCB on the substrate 300.
  • the second FPCB By inserting the second FPCB into the groove 301 as shown in Figure 4b, it is possible to eliminate the step between the substrate 300 and the pressure detection module 400. That is, the second FPCB may be inserted into the groove 301, whereby the depth of the groove 301 may be equal to the thickness D of the second FPCB.
  • the second FPCB may be inserted into the mounting space 310 and attached to the bottom surface of the substrate 300.
  • the pressure detection module 400 further includes a shielding layer 401, and the shielding layer 401 is attached to the lower surface of the display panel 470A, and the insulating layer 470 is shielded ( An embodiment in the case of being disposed on 401, the principles described above in FIGS. 4B and 4C can be equally applied.
  • the second FPCB or the substrate 300 may be electrically connected to the reference potential layer 402.
  • the insulating layer 470 is disposed on the lower surface of the display panel 200A, and the pressure sensors 450 and 460 are disposed on the insulating layer 470.
  • the reference potential layer 402 may be disposed to face the pressure sensors 450 and 460.
  • the second FPCB may include an FPCB insulating layer (not shown) and a ground electrode (not shown) in contact with the reference potential layer 402.
  • the FPCB insulating layer may include a cut off part (not shown) in which a portion of the FPCB insulating layer is cut off, and a ground electrode is formed on the reference potential layer through the cut off part. 402 may be electrically connected.
  • a conductive tape made of a conductive adhesive material such as OCA may be disposed in the cut off part, and the ground electrode may be attached to the reference potential layer 402 using the conductive tape.
  • the insulating layer 470 is not only attached to the lower surface of the display panel 200A but also shielded between the insulating layer 470 and the display panel 200A as shown in FIGS. 6A and 6B. The same can be applied to the case where the layer 401 is disposed.
  • the second FPCB when the second FPCB is inserted into the upper portion of the substrate 300 as shown in FIG. 4B, the second FPCB may be electrically connected to the reference potential layer 402 as in the first embodiment described above.
  • the substrate 300 may be electrically connected to the reference potential layer 402. That is, in the case of FIG. 4A, only the first embodiment described above in which the second FPCB is attached to the upper surface of the substrate 300 and the second FPCB may be electrically connected to the reference potential layer 402 may be applied.
  • the second FPCB is inserted into the upper portion of the substrate 300, and in addition to the first embodiment described above, a second embodiment in which the substrate 300 is electrically connected to the reference potential layer 402 may be additionally applied.
  • the substrate 300 may be attached to the reference potential layer 402 by using a conductive tape, and the substrate 300 may be electrically connected to the reference potential layer 402 through the conductive tape.
  • the reference potential layer of the present invention may have a ground potential.
  • the reference potential layer 402 and / or the shielding layer 401 for shielding noise according to the embodiment of the present invention may be implemented by a conductor such as a metal plate or a conductive film.
  • a conductor such as a metal plate or a conductive film.
  • the metal plate or the conductive film may include a conductive material such as graphite or nickel.
  • the pressure detection module 400 may be attached to the lower portion of the display panel 200A by using a pressure sensitive adhesive (PSA).
  • PSA pressure sensitive adhesive
  • the pressure-sensitive adhesive (PSA) may be used when the pressure sensors 450 and 460 and the insulating layer 470 are attached or the shielding layer 401 and the insulating layer 470 are attached.
  • the pressure detection module 400 may be full lamination beneath the display panel 200A.
  • the pressure detection module 400 may be attached to the lower portion of the display panel 200A through an adhesive material such as a double-sided contact tape (DAT), an optically clear adhesive (OCA), an optical clear resin (OCR), or the like.
  • an adhesive material such as a double-sided contact tape (DAT), an optically clear adhesive (OCA), an optical clear resin (OCR), or the like.
  • Figure 5 illustrates the attachment structure of the pressure sensor according to the embodiment of the present invention.
  • FIG. 5 illustrates a cross section of a sensor sheet 440 in accordance with an embodiment of the present invention.
  • FIG. 5A a cross section of the case in which the sensor sheet 440 including the pressure sensors 450 and 460 is attached on the shielding layer 401 is illustrated.
  • the pressure sensors 450 and 460 are positioned between the first insulating layer 470 and the second insulating layer 471 in the sensor sheet 440, the pressure sensors 450 and 460 are prevented from being short-circuited with the shielding layer 401. Can be.
  • the sensor sheet 440 may be disposed on the shielding layer 401 as shown in FIG. 5A, but when there is no shielding layer 401, as shown in FIG. 5B, the display panel ( 200A) or may be disposed above the second FPCB as shown in FIG. 5C.
  • the display panel 200A or the second FPCB to which the pressure sensors 450 and 460 are attached may not exhibit ground potential or may exhibit weak ground potential.
  • the touch input device 1000 according to the embodiment of the present invention may further include a ground electrode (not shown) between the display panel 200A or the second FPCB and the insulating layer 470.
  • another insulating layer (not shown) may be further included between the ground electrode and the display panel 200A or the second FPCB.
  • the ground electrode may prevent the size of the capacitance generated between the first sensor 450 and the second sensor 460 from becoming too large.
  • the first sensor 450 and the second sensor 460 are formed on the same layer, and each of the first sensor 450 and the second sensor 460 shown in FIG. 5 is a lozenge as shown in FIG. 7A. It may be composed of a plurality of sensors in the form. Here, the plurality of first sensors 450 are connected to each other in the first axis direction, and the plurality of second sensors 460 are connected to each other in the second axis direction perpendicular to the first axis direction. At least one of the 450 and the second sensor 460 may have a plurality of diamond-shaped electrodes connected to each other through a bridge such that the first sensor 450 and the second sensor 460 are insulated from each other. In this case, the first sensor 450 and the second sensor 460 illustrated in FIG. 5 may be configured as electrodes of the type shown in FIG. 7B.
  • the first sensor 450 and the second sensor 460 may be implemented in different layers according to the exemplary embodiment to configure the sensor layer.
  • FIG. 5B illustrates a cross section when the first sensor 450 and the second sensor 460 are implemented on different layers.
  • the first sensor 450 is formed on the first insulating layer 470
  • the second sensor 460 is second insulating positioned on the first sensor 450. May be formed on layer 471.
  • the second sensor 460 may be covered with a third insulating layer 472. That is, the sensor sheet 440 may include a first insulating layer 470 to a third insulating layer 472, a first sensor 450 and a second sensor 460.
  • the first sensor 450 and the second sensor 460 are located on different layers, they may be implemented to overlap each other.
  • the first sensor 450 and the second sensor 460 are similar to the pattern of the driving electrode TX and the receiving electrode RX arranged in a structure of M ⁇ N (M times N) as shown in FIG. 7C. Can be formed.
  • M and N may be one or more natural numbers.
  • the first sensor 450 and the second sensor 460 having a rhombic shape may be located at the same position.
  • FIG. 5C illustrates a cross section when the sensor sheet 440 includes only the first sensor 450. As illustrated in FIG. 5C, the sensor sheet 440 including the first sensor 450 may be disposed on the shielding layer 401.
  • the sensor sheet 440 of the type shown in (b) and (c) of Figure 5a may be disposed on the shielding layer 401 as described above in (a), but without the shielding layer 401
  • the display panel 200A may be disposed below, or as shown in FIG. 5C, above the second FPCB.
  • the sensor sheet 440 may further include a ground electrode (not shown) between the display panel 200A or the second FPCB and the first insulating layer 470. In this case, the sensor sheet 440 may further include an additional insulating layer (not shown) between the ground electrode (not shown) and the display panel 200A or the second FPCB.
  • FIG. 5 may be applied to the same / similar to the mutual capacitance method or the self capacitance method of FIG. 4.
  • 8A to 8H illustrate further embodiments of the touch input device 1000 described above with reference to FIGS. 4 to 6.
  • FIG. 8A illustrates an example in which the second FPCB is inserted into the mounting space 310 and attached to the bottom surface of the substrate 300.
  • the pressure detection module 400 further includes a shielding layer 401.
  • the case where the layer 401 is attached to the lower surface of the display panel 470A and the insulating layer 470 is disposed on the shielding layer 401 is illustrated.
  • the second FPCB including the substrate 300 or the ground electrode may be implemented as the reference potential layer.
  • FIG. 8B illustrates an example in which the second FPCB is inserted into the mounting space 310 and attached to the bottom surface of the substrate 300.
  • the insulating layer 470 is attached to the bottom surface of the display panel 470A and the pressure sensors 450 and 460 are insulated.
  • the second FPCB including the substrate 300 or the ground electrode may be implemented as the reference potential layer.
  • the pressure detection module 400 further includes a shielding layer 401, and the shielding layer 401 is disposed on the upper surface of the second FPCB.
  • the capacitance change according to the distance change between the pressure sensors 450 and 460 and the reference potential layer 402 attached to the lower surface of the display panel 200A may be detected.
  • the pressure detection module 400 further includes a shielding layer 401, so that the shielding layer 401 is the second FPCB.
  • the capacitance change according to the distance change between the reference sensors 402 attached to the upper surface and attached to the lower surface of the pressure sensors 450 and 460 and the display panel 200A may be detected.
  • the second FPCB is inserted into the upper portion of the substrate 300, and the pressure detection module 400 further includes a shielding layer 401 as shown in FIG. 6D, and the shielding layer 401 is disposed on the top surface of the second FPCB.
  • the capacitance change according to the distance change between the reference potential layer and the pressure sensors 450 and 460 formed on or inside the display panel 200A may be detected.
  • the pressure detection module 400 further includes a shielding layer 401, and the shielding layer 401 is a second FPCB.
  • the capacitance change may be detected according to a change in distance between the reference potential layer and the pressure sensors 450 and 460 attached to the upper surface and formed on or inside the display panel 200A.
  • FIG. 8G illustrates an example in which 2FPCB is inserted into the mounting space 310 and attached to the bottom surface of the substrate 300.
  • the capacitance change according to the distance change between the reference potential layers 402 can be detected.
  • FIG. 8H illustrates an example in which 2FPCBs are inserted into the mounting space 310 and attached to the bottom surface of the substrate 300.
  • the capacitance change according to the distance change between the reference potential layers formed on the surface can be detected.
  • FIG. 8I shows that the second FPCB is attached to the upper surface of the substrate 300 as shown in FIG. 6A, and the pressure detection module 400 further includes a shielding layer 401, and the shielding layer 401 is attached to the upper surface of the second FPCB.
  • the capacitance change according to the distance change between the reference potential layer and the pressure sensors 450 and 460 formed on or inside the display panel 200A may be detected.
  • a smart phone including a display module that can detect the position of the touch on the touch screen as well as the size of the touch pressure.
  • a smartphone including a display module, which is configured to detect a touch position and a magnitude of pressure of the touch without degrading the visibility and the light transmittance of the display module.
  • Another object of the present invention is to arrange a separate layer for implementing the reference potential layer, it is possible to effectively block the noise generated in the touch input device.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Plasma & Fusion (AREA)
  • Position Input By Displaying (AREA)

Abstract

L'invention concerne un dispositif d'entrée tactile comprenant : un panneau d'affichage ; un substrat espacé d'une distance prédéterminée du panneau d'affichage ; une couche d'isolation disposée entre le panneau d'affichage et le substrat ; un module de détection de pression comprenant au moins un capteur de pression disposé sur la couche d'isolation pour détecter une pression tactile ainsi qu'une couche de potentiel électrique de référence disposée de façon à faire face au(x) capteur(s) de pression ; et un circuit imprimé souple (FPCB) connecté au panneau d'affichage, le module de détection de pression étant disposé entre le panneau d'affichage et le FPCB.
PCT/KR2018/000752 2017-01-19 2018-01-16 Dispositif d'entrée tactile WO2018135840A1 (fr)

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