WO2017034219A1 - Dispositif permettant de détecter une pression tactile d'un écran tactile - Google Patents

Dispositif permettant de détecter une pression tactile d'un écran tactile Download PDF

Info

Publication number
WO2017034219A1
WO2017034219A1 PCT/KR2016/009104 KR2016009104W WO2017034219A1 WO 2017034219 A1 WO2017034219 A1 WO 2017034219A1 KR 2016009104 W KR2016009104 W KR 2016009104W WO 2017034219 A1 WO2017034219 A1 WO 2017034219A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
pressure sensor
wire
touch
signal
Prior art date
Application number
PCT/KR2016/009104
Other languages
English (en)
Korean (ko)
Inventor
정익찬
전준현
Original Assignee
크루셜텍(주)
캔버스바이오 주식회사
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
Priority claimed from KR1020160019375A external-priority patent/KR20170026069A/ko
Application filed by 크루셜텍(주), 캔버스바이오 주식회사 filed Critical 크루셜텍(주)
Publication of WO2017034219A1 publication Critical patent/WO2017034219A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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

Definitions

  • the present invention relates to a touch pressure detection device of a touch screen, and to a touch pressure detection device that eliminates the difference in electrical characteristics between each pressure sensor and enables accurate pressure sensing.
  • a touch panel is an input device mounted on the display surface and converting a physical contact such as a user's finger into an electrical signal to operate the product.
  • the touch panel can be widely applied to various display devices. It is growing rapidly.
  • Such touch panels may be classified into resistive, capacitive, ultrasonic (SAW), infrared (IR), and the like according to the operation principle.
  • SAW resistive, capacitive, ultrasonic
  • IR infrared
  • conventional capacitive touch panels basically include a substrate, a metal wiring layer, and a pattern layer.
  • the pattern layer is composed of a plurality of pattern electrodes (touch patterns), and each pattern electrode generates an electrical signal in response to external physical contact.
  • the generated electrical signal is transmitted to the controller of the product through metal wires connected to the pattern electrode to operate the product.
  • a pressure sensor for such an operation, it is generally disposed at the edge of the touch panel. Since the arrangement position of each pressure sensor is different based on the driving circuit that controls the operation of the pressure sensor, the electrical characteristic difference between the pressure sensors is different. Will occur.
  • An object of the present invention is to eliminate the difference in electrical characteristics in a plurality of pressure sensing unit mounted on the touch screen.
  • Another object of the present invention is to eliminate the parasitic capacitance that may be formed in the connection path between the pressure sensing unit and the driving circuit mounted on the touch screen.
  • At least one pressure sensing unit for sensing the pressure applied to the touch screen; A signal wire and a ground wire connected to each of the pressure sensing units; And a shield wire disposed between the signal wire and the ground wire, the shield wire being controlled over the signal wire and the coin during the pressure sensing operation through the pressure sensing unit.
  • the touch pressure detecting device may further include a buffer for supplying a potential of the signal wire to the shield wire.
  • the first pressure sensing unit and the second pressure sensing unit for sensing the pressure applied to the touch screen;
  • a ground wire connected to the first pressure sensing unit and the second pressure sensing unit;
  • a first signal wire and a second signal wire connected to each of the first pressure sensing part and the second pressure sensing part, wherein the first signal wire extends between the second signal wire and the ground wire.
  • a touch pressure detecting device which is controlled on the second signal line and the coin during the pressure sensing operation of the second pressure sensing unit.
  • the touch pressure detecting device may further include a buffer configured to supply a potential of the second signal wire to the first signal wire.
  • the difference in electrical characteristics in the plurality of pressure sensing units mounted on the touch screen is eliminated, so that the accuracy of pressure sensing can be improved.
  • the shield wiring is disposed between the signal wiring and the ground wiring connected to each of the pressure sensing units mounted on the touch screen, and the signal wiring and the shield wiring are maintained at coincidence when sensing. The phenomenon in which parasitic capacitance is formed can be prevented.
  • FIG. 1 is a view showing the configuration of a display device capable of detecting touch pressure according to an embodiment of the present invention.
  • FIG. 2 is a flowchart illustrating a manufacturing process of a display device capable of detecting touch pressure according to an exemplary embodiment of the present invention.
  • FIG. 3 is a diagram illustrating a configuration of a pressure sensor in a display device capable of detecting touch pressure.
  • FIG. 4 is a circuit diagram illustrating an equivalent circuit of an impedance formed in a pressure sensor according to an exemplary embodiment of the present invention.
  • FIG. 5 is a diagram schematically showing an arrangement of shield wiring according to an embodiment of the present invention.
  • FIG. 6 is a circuit diagram illustrating an operation in which signal wires and shield wires are held in coin positions according to an embodiment of the present invention.
  • FIG. 7 is a view showing the configuration of a touch pressure detection device according to an embodiment of the present invention.
  • FIG. 8 is a view showing the configuration of a touch pressure detection device according to another embodiment of the present invention.
  • FIG. 1 is a view showing a schematic configuration of a touch pressure detection device according to an embodiment of the present invention.
  • a touch screen display device including a touch pressure detection device may include a substrate 100, a black matrix 200 formed below the substrate 100, and a black matrix 200 below. It includes a transparent electrode layer 300 is formed.
  • the substrate 100 is formed on the outermost front surface of the display device, and serves to prevent physical impact from the outside.
  • the substrate 100 may be made of a transparent material, and preferably, may be made of a material such as glass.
  • the black matrix 200 is formed on the outer side of the display device and includes an outer black matrix having an opening therein.
  • a plurality of internal black matrices may be formed in the opening.
  • an electrode pattern may be formed on the transparent electrode layer 300 to detect a touch occurring on the upper surface of the substrate 100.
  • the electrode pattern may be variously configured according to the touch sensing method. For example, when the display device is implemented as a mutual capacitive touch screen using a principle in which mutual capacitance between electrodes varies before and after touch, the electrode pattern includes a plurality of first electrodes disposed in parallel to each other in a row direction.
  • the first electrode layer may include a second electrode layer including a plurality of second electrodes disposed in parallel with each other in a column direction.
  • the electrode pattern is a plurality of sensor pads in the form of a matrix It may be made of an electrode layer disposed as.
  • the electrode pattern may be made of a transparent material such as indium tin oxide (ITO).
  • At least a portion of the edge of the transparent electrode layer 300 is provided with a plurality of pressure sensors 310 for detecting the pressure of the touch generated on the upper surface of the substrate 100.
  • the pressure sensor 310 may be disposed near each corner of the transparent electrode layer 300 as shown in FIG. 1, but is not limited thereto.
  • Each of the pressure sensors 310 includes a first electrode 311, a piezoelectric material 312 formed under the first electrode 311, a second electrode 313 and a second formed under the piezoelectric material 312.
  • the protective layer 314 may be formed of an insulating material formed under the electrode 313.
  • the first electrode 311 may be implemented as part of the transparent electrode layer 300. That is, a part of the electrode pattern formed on the transparent electrode layer 300 may function as the first electrode 311 of the pressure sensor 310.
  • the first electrode 311 and the second electrode 313 are formed to face each other, and if necessary, between the first electrode 311 and the piezoelectric material 312, or between the first electrode 311 and the black matrix 200.
  • a carbon layer or the like may be further formed between the layers.
  • the pressure sensor 310 includes a piezoelectric material whose resistance value decreases as the pressure is applied, as will be described later.
  • the pressure sensor 310 may grasp the current pressure through an electrical signal output from the pressure sensor 310. .
  • a paint having a surface resistance may be utilized instead of the pressure sensor 310.
  • an electrical signal is applied to the paint, and the paint has a sheet resistance value that varies according to the applied pressure, so that the value of the current flowing through the paint also varies according to the electrical signal. Using these characteristics, it is possible to grasp the pressure currently being applied through the electrical signal obtained from the paint.
  • a paint having a pressure sensor and a sheet resistance or similar properties, that is, materials exhibiting different electrical characteristics depending on the pressure applied may be collectively referred to as a pressure sensing unit.
  • FIG. 2 is a flowchart illustrating a manufacturing process of the display device illustrated in FIG. 1.
  • a black matrix 200 is formed on a substrate 100 by a printing method or a sputtering method (S210).
  • an electrode layer for forming the transparent electrode layer 300 is coated on the entire surface of the substrate 100 on which the black matrix 200 is formed (S220).
  • the electrode layer may be formed by a sputtering method.
  • an electrode pattern for touch detection and an electrode pattern for touch pressure detection are formed on the electrode layer by wet etching, dry etching, or laser (S230).
  • the electrode pattern for pressure detection becomes part of the pressure sensor 310. That is, a part of the transparent electrode layer 300 functions as the first electrode 311 among the components of the pressure sensor 310, as described above.
  • the piezoelectric material 312 is printed and formed on the first electrode 311 of the pressure sensor 310 (S240), and the first electrode 311 is formed so as to face the first electrode 311 on the piezoelectric material 312.
  • the second electrode 313 is formed (S250).
  • An insulating layer is formed as a protective layer 314 for protecting the electrode constituting the pressure sensor 310 on the second electrode 313, thereby completing a touch screen display device capable of detecting touch pressure (S260).
  • FIG. 3 is a plan view showing in detail the configuration of the pressure sensor 310 shown in FIG.
  • Each pressure sensor 310 is connected to the driving circuit 400 through a signal line 320 for transmitting and receiving an electrical signal and a ground line 330 maintained at a ground potential.
  • the piezoelectric material 312 (refer to FIG. 1) included in each pressure sensor 310 is made of an elastic material such as Force Sensing Resistor (FSR), and the piezoelectric material is an electrical material whose resistance value decreases as pressure is applied. Has characteristics.
  • FSR Force Sensing Resistor
  • the electrical signal supplied from the driving circuit 400 is transmitted to each pressure sensor 310 through the signal wire 320, the electrical signal as a response according to the current resistance value of the pressure sensor 310 is again driven by the driving circuit 400. Is measured by.
  • the driving circuit 400 determines the current resistance value of each pressure sensor 310 through the measured electrical signal, and measures the current applied pressure.
  • All four pressure sensors 310 are connected to the driving circuit 400 through the signal wire 320 for the above-described measurement. Since the driving circuit 400 is disposed on one side of the display device, the length of the signal wire 320 connected to the pressure sensor 310 is longer than the driving circuit 400.
  • the signal wire 320 extending from the pressure sensor 310 disposed adjacent to the driving circuit 400 is relatively short, and the signal wire extending from the pressure sensor 310 disposed far from the driving circuit 400.
  • the length of 320 is relatively long.
  • FIG. 3 an equivalent circuit diagram showing that the pressure sensor 310 located at the upper right of the drawing is connected to the driving circuit 400 is the same as that of FIG. 4.
  • the pressure sensor 310 since the pressure sensor 310 operates on the principle that the resistance value varies according to the applied pressure, the pressure sensor 310 may be displayed by replacing it with a variable resistor.
  • the signal wires 320 and the ground wires 330 are connected to each pressure sensor 310, and the parasitic capacitance Cp is formed in the signal wires 320 and the ground wires 330.
  • the parasitic capacitance Cp is formed together with the resistor R having a relatively large value when the signal wire 320 and the ground wire 330 are formed of a transparent electrode having a sheet resistance value.
  • the driving circuit 400 may not detect the resistance change value of the pressure sensor 310 properly or requires a very long time to detect the change.
  • the shield wire 340 is disposed between the signal wire 320 and the ground wire 330 connected to the pressure sensor 310.
  • the signal wire 320 and the shield are applied by applying a potential of the signal wire 320 connected to each pressure sensor 310 to the shield wire 340 disposed adjacent to the signal wire 320.
  • the parasitic capacitance Cp (see FIG. 4) formed in the signal wiring 320 can be made zero.
  • the change in resistance value in the pressure sensor 310 can be accurately transmitted to the driving circuit 400 side.
  • FIG. 6 is a circuit diagram for describing an operation of applying a potential of a pressure sensor to a shield wire according to an exemplary embodiment of the present invention.
  • the potential of the signal wire 320 connected to each pressure sensor 310 may be applied to the shield line 340 through the buffer B, and thus the potential of the pressure sensor 310 may be applied.
  • the potential of the shield line 340 may be the same.
  • the buffer B serves to supply the potential of the signal wire 320 connected to the pressure sensor 310 to the shield line 340 as it is, and the difference in electrical characteristics between the signal wire 320 and the shield line 340. It rewards you.
  • FIG. 7 is a diagram illustrating a structure of a pressure sensor to which a shield wire according to an embodiment of the present invention is applied.
  • a signal wire 320 and a ground wire 330 are connected to each pressure sensor 310, and a shield wire 340 is disposed between the signal wire 320 and the ground wire 330. It can be seen that.
  • the phenomenon in which parasitic capacitance is formed in the signal wiring 320 can be effectively prevented, and the driving circuit and the pressure sensor ( Regardless of the distance between the 310, the resistance change value in the pressure sensor 310 can be accurately transmitted to the driving circuit side.
  • FIG. 8 is a diagram illustrating a structure of a pressure sensor to which a shield wire according to another embodiment of the present invention is applied.
  • the first pressure sensor 310-1 and the second pressure sensor 310-2 are connected to the first signal wire 320-1 and the second signal wire 320-2, respectively.
  • Shield wires (not shown) may be disposed between the first signal wire 320-1 and the ground wire 330 as in the exemplary embodiment described with reference to FIG. 7.
  • the second pressure sensor 310-2 has a signal wire 320-1 connected to the first pressure sensor 310-1, not the shield wire, between the second signal wire 320-2 and the ground wire 330. Can be seen extending.
  • the signal wire 320-1 connected to the first pressure sensor 310-1 extends to the vicinity of the second pressure sensor 310-2, and the second wire connected to the second pressure sensor 310-2. It may be disposed between the signal wire 320-2 and the ground wire 330 to replace the shield wire.
  • the second signal wire 320-2 when the pressure is sensed to the second pressure sensor 310-2, the second signal wire 320-2 is supplied by supplying the potential of the second signal wire 320-2 to the first signal wire 320-2.
  • a parasitic capacitance may be prevented from being formed in the second signal wire 320-2 without additional components.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

L'invention porte, selon un mode de réalisation, sur un dispositif de détection de pression tactile comprenant : une ou plusieurs unités de détection de pression destinées à détecter une pression appliquée sur un écran tactile ; un fil de transmission et un fil de mise à la terre, qui sont raccordés à chaque capteur de pression ; et un câble de garde agencé entre le fil de transmission et le fil de mise à la terre, et réglé au même potentiel que celui du fil de transmission lorsqu'une opération de détection de pression est effectuée au moyen des unités de détection de pression.
PCT/KR2016/009104 2015-08-27 2016-08-18 Dispositif permettant de détecter une pression tactile d'un écran tactile WO2017034219A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2015-0121213 2015-08-27
KR20150121213 2015-08-27
KR10-2016-0019375 2016-02-18
KR1020160019375A KR20170026069A (ko) 2015-08-27 2016-02-18 터치 압력 검출 장치

Publications (1)

Publication Number Publication Date
WO2017034219A1 true WO2017034219A1 (fr) 2017-03-02

Family

ID=58100272

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/009104 WO2017034219A1 (fr) 2015-08-27 2016-08-18 Dispositif permettant de détecter une pression tactile d'un écran tactile

Country Status (1)

Country Link
WO (1) WO2017034219A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018182287A1 (fr) * 2017-03-28 2018-10-04 삼성전자 주식회사 Procédé de commande à faible puissance d'un dispositif d'affichage et dispositif électronique pour la mise en oeuvre de ce procédé

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101461926B1 (ko) * 2012-06-04 2014-11-14 크루셜텍 (주) 기생 정전용량을 감쇄하는 터치 검출 장치 및 방법
KR20150002918A (ko) * 2013-06-26 2015-01-08 엘지디스플레이 주식회사 터치 센싱 장치 및 그 구동 방법
KR20150019157A (ko) * 2013-08-12 2015-02-25 주식회사 켐트로닉스 정전용량방식 접촉감지패널
KR101537229B1 (ko) * 2013-08-30 2015-07-16 크루셜텍 (주) 터치 검출 장치 및 방법
KR20150085395A (ko) * 2014-01-15 2015-07-23 한상현 반전 구동 ｌｃｄ 디스플레이 장치에 구비된 터치스크린 제어장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101461926B1 (ko) * 2012-06-04 2014-11-14 크루셜텍 (주) 기생 정전용량을 감쇄하는 터치 검출 장치 및 방법
KR20150002918A (ko) * 2013-06-26 2015-01-08 엘지디스플레이 주식회사 터치 센싱 장치 및 그 구동 방법
KR20150019157A (ko) * 2013-08-12 2015-02-25 주식회사 켐트로닉스 정전용량방식 접촉감지패널
KR101537229B1 (ko) * 2013-08-30 2015-07-16 크루셜텍 (주) 터치 검출 장치 및 방법
KR20150085395A (ko) * 2014-01-15 2015-07-23 한상현 반전 구동 ｌｃｄ 디스플레이 장치에 구비된 터치스크린 제어장치

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018182287A1 (fr) * 2017-03-28 2018-10-04 삼성전자 주식회사 Procédé de commande à faible puissance d'un dispositif d'affichage et dispositif électronique pour la mise en oeuvre de ce procédé
CN110476138A (zh) * 2017-03-28 2019-11-19 三星电子株式会社 显示器的低功率驱动方法和用于执行该方法的电子设备
EP3582065A4 (fr) * 2017-03-28 2020-04-01 Samsung Electronics Co., Ltd. Procédé de commande à faible puissance d'un dispositif d'affichage et dispositif électronique pour la mise en oeuvre de ce procédé
US11106307B2 (en) 2017-03-28 2021-08-31 Samsung Electronics Co., Ltd. Method for low power driving of display and electronic device for performing same
CN110476138B (zh) * 2017-03-28 2024-02-13 三星电子株式会社 显示器的低功率驱动方法和用于执行该方法的电子设备

Similar Documents

Publication Publication Date Title
US9864458B2 (en) Touch-control display panel
WO2015016562A1 (fr) Panneau à capteur tactile, dispositif de détection tactile et dispositif à entrée tactile
WO2010019004A2 (fr) Panneau tactile comportant des électrodes bidirectionnelles adjacentes, et appareil tactile
WO2009096712A2 (fr) Appareil tactile présentant une structure de prévention de la capacité parasite
WO2012057409A1 (fr) Capteur d'écran tactile
WO2009096706A9 (fr) Panneau tactile à structure d'électrode en deux parties et dispositif tactile pourvu dudit panneau tactile
CN107783689B (zh) 驱动芯片、电路膜、膜上芯片型驱动电路及显示装置
EP3561650B1 (fr) Dispositif de détection d'entrée et afficheur le comprenant
WO2017023108A1 (fr) Détecteur tactile, puce de détection tactile et dispositif d'entrée tactile
WO2016093526A1 (fr) Panneau à écran tactile
WO2016089149A1 (fr) Écran, appareil à entrée tactile, appareil de détection destiné à détecter une position de contact et une pression de contact sur un écran, et procédé de détection
WO2011002175A2 (fr) Écran tactile capacitif
WO2011049285A1 (fr) Panneau tactile capable de détecter de multiples contacts et procédé de détection de multiples contacts pour le panneau tactile
TW201709038A (zh) 一種三維觸控裝置
CN106055166A (zh) 电容性触摸屏面板
WO2012134026A1 (fr) Appareil et procédé de détection de contact
WO2013012216A2 (fr) Panneau à écran tactile doté d'une fonction de décharge électrostatique
US20170160866A1 (en) Touch display device
WO2012173305A1 (fr) Panneau tactile hybride capable de détecter une capacité et une pression
WO2013180438A1 (fr) Ecran tactile capacitif monocouche amélioré
CN105549245A (zh) 彩膜基板及触控显示装置
WO2014104642A1 (fr) Appareil et procédé de détection de toucher
WO2012157930A2 (fr) Dispositif de capteur d'écran tactile pour un capteur d'écran tactile ayant une précision améliorée lors de la détection d'une position tactile
CN106855760B (zh) 具压力感测功能的触控显示装置
WO2014003518A1 (fr) Dispositif d'affichage tactile

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16839508

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16839508

Country of ref document: EP

Kind code of ref document: A1