WO2013037117A1 - Afficheur tactile capable d'exclure un contact influençant l'affichage - Google Patents

Afficheur tactile capable d'exclure un contact influençant l'affichage Download PDF

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Publication number
WO2013037117A1
WO2013037117A1 PCT/CN2011/079706 CN2011079706W WO2013037117A1 WO 2013037117 A1 WO2013037117 A1 WO 2013037117A1 CN 2011079706 W CN2011079706 W CN 2011079706W WO 2013037117 A1 WO2013037117 A1 WO 2013037117A1
Authority
WO
WIPO (PCT)
Prior art keywords
display
touch
liquid crystal
electrode
signal
Prior art date
Application number
PCT/CN2011/079706
Other languages
English (en)
Chinese (zh)
Inventor
陈其良
刘海平
Original Assignee
智点科技（深圳）有限公司
智点科技有限公司
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 智点科技（深圳）有限公司, 智点科技有限公司 filed Critical 智点科技（深圳）有限公司
Priority to PCT/CN2011/079706 priority Critical patent/WO2013037117A1/fr
Publication of WO2013037117A1 publication Critical patent/WO2013037117A1/fr

Links

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
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • G06F3/0416—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
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • 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
    • 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

Definitions

  • a flat panel display with a touch screen stacks the split touch screen with the display screen, detects the planar position of the touch point through the touch screen, and causes the cursor on the display screen to follow the touch point.
  • the cascading of the touch screen and the display screen makes the touch panel display thicker and heavier and the cost increases; when the touch screen is placed in front of the display screen, the reflection generated by the touch screen sensing electrode makes the display uneven and strong. The contrast is reduced in the external light environment, which affects the display effect. Integrating the touchpad and the display to make the flat panel display with touch function lighter and thinner is the direction of people's efforts.
  • the display signal applied to the liquid crystal molecules causes different alignment modes of the liquid crystal molecules due to different display contents, and different arrangement modes of the liquid crystal molecules may touch
  • the influence of the signal even after the end of the applied display driving signal, due to the hysteresis effect of the liquid crystal molecules on the applied voltage, the display signal will affect the touch signal, thereby reducing the accuracy of the touch detection, in order to exclude the liquid crystal material dielectric
  • the variation of the distributed capacitance caused by the coefficient anisotropy improves the accuracy of the touch detection.
  • the present invention is an improvement on the effect of eliminating the change of the display content on the detection of the touch signal. Summary of the invention
  • Figure 10 is a waveform diagram of a liquid crystal pre-drive signal of a fourth embodiment
  • FIG. 14 is a waveform diagram of a liquid crystal pre-drive signal according to Embodiment 7 and Mode 8;
  • the thin film field effect transistor liquid crystal display is a typical representative of an active matrix liquid crystal display (AM LCD), which uses a thin film field effect transistor (TFT) on a substrate as a switching device.
  • a typical structure of a TFT-LCD display is as shown in FIG.
  • the voltage between the gate and the source of the TFT is Vgs
  • the voltage between the gate (Gate) and the drain (Drain) of the TFT is Vgd.
  • Thin film field effect transistors are available in both the OS type and the PM0S type. At present, most of the TFT-LCD thin-film field-effect transistors use an amorphous silicon (a_S i) process, and the gate insulating layer is silicon nitride (S iNx ), which is easy to draw a positive charge.
  • the touch circuit 43 transmits the touch excitation signal to some or all of the row and column touch electrode lines, and detects the change of the touch signals flowing through the line electrode lines and the column electrode lines, respectively.
  • the row touch electrode line and the column touch electrode line that are detected by the touch circuit 43 to change the touch signal that has reached a certain set condition are the touched electrode lines.
  • the position of the touch point on the display screen 41 is determined by the intersection of the detected touched electrode line and the touched electrode line.

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)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un afficheur tactile capable d'exclure un contact influençant l'affichage, comprenant un écran d'affichage à cristaux liquides actif, un circuit de commande d'affichage, et un circuit tactile. Il y a une matrice de dispositifs actifs et un ensemble d'électrodes de rangée et un ensemble d'électrodes de colonne connectés à la matrice de dispositifs actifs sur au moins un substrat de l'écran d'affichage à cristaux liquides actif, il y a une électrode commune sur un autre substrat de l'écran d'affichage, et il est prévu une ligne d'électrodes tactiles sur l'un des deux substrats ou sur un troisième substrat. Après qu'une période de temps d'affichage normale s'est écoulée, un signal de précommande de cristal liquide est appliqué à une partie ou à la totalité des lignes d'électrodes de rangée et de colonne et à l'électrode commune de l'écran d'affichage, l'amplitude du signal de précommande de cristal liquide étant suffisante pour permettre que la différence de potentiel entre les lignes d'électrodes de rangée et de colonne auxquelles un signal de précommande de cristal liquide est appliqué et l'électrode commune soit supérieure ou égale à la tension de commande de saturation du cristal liquide, et pour permettre que les molécules de cristal liquide entre les lignes d'électrodes de rangée et de colonne auxquelles un signal de précommande de cristal liquide est appliqué et l'électrode commune soient dans un état d'agencement déterminé de manière à exclure l'influence sur une détection de signal tactile par un changement de contenu d'affichage.
PCT/CN2011/079706 2011-09-15 2011-09-15 Afficheur tactile capable d'exclure un contact influençant l'affichage WO2013037117A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/079706 WO2013037117A1 (fr) 2011-09-15 2011-09-15 Afficheur tactile capable d'exclure un contact influençant l'affichage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/079706 WO2013037117A1 (fr) 2011-09-15 2011-09-15 Afficheur tactile capable d'exclure un contact influençant l'affichage

Publications (1)

Publication Number Publication Date
WO2013037117A1 true WO2013037117A1 (fr) 2013-03-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/079706 WO2013037117A1 (fr) 2011-09-15 2011-09-15 Afficheur tactile capable d'exclure un contact influençant l'affichage

Country Status (1)

Country Link
WO (1) WO2013037117A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101017419A (zh) * 2005-06-30 2007-08-15 深圳市联思精密机器有限公司 触控式平板显示器
CN101118470A (zh) * 2006-08-02 2008-02-06 陈其良 触控式平板显示器电极结构
WO2011035486A1 (fr) * 2009-09-27 2011-03-31 智点科技有限公司 Ecran d'affichage à commande tactile apte à supprimer un impact d'un signal d'affichage sur un écran d'affichage à commande tactile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101017419A (zh) * 2005-06-30 2007-08-15 深圳市联思精密机器有限公司 触控式平板显示器
CN101118470A (zh) * 2006-08-02 2008-02-06 陈其良 触控式平板显示器电极结构
WO2011035486A1 (fr) * 2009-09-27 2011-03-31 智点科技有限公司 Ecran d'affichage à commande tactile apte à supprimer un impact d'un signal d'affichage sur un écran d'affichage à commande tactile

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