WO2017075978A1 - 触控显示面板、触控显示装置及驱动方法 - Google Patents

触控显示面板、触控显示装置及驱动方法 Download PDF

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Publication number
WO2017075978A1
WO2017075978A1 PCT/CN2016/083440 CN2016083440W WO2017075978A1 WO 2017075978 A1 WO2017075978 A1 WO 2017075978A1 CN 2016083440 W CN2016083440 W CN 2016083440W WO 2017075978 A1 WO2017075978 A1 WO 2017075978A1
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WIPO (PCT)
Prior art keywords
touch
antistatic layer
electrode
touch display
pressure
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PCT/CN2016/083440
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English (en)
French (fr)
Inventor
王海生
董学
薛海林
陈小川
丁小梁
刘英明
赵卫杰
杨盛际
刘伟
李昌峰
刘红娟
王鹏鹏
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Priority to US15/325,653 priority Critical patent/US10133383B2/en
Publication of WO2017075978A1 publication Critical patent/WO2017075978A1/zh

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    • 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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136204—Arrangements to prevent high voltage or static electricity failures
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/121—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode common or background
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position

Definitions

  • the present disclosure relates to the field of liquid crystal display, and in particular to a touch display panel, a touch display device, and a driving method.
  • touch display panels are increasingly used in electronic products, and capacitive touch display panels are the most commonly used ones in touch display panels.
  • the capacitive touch display panel utilizes the current sensing of the human body to work.
  • the capacitive touch display panel is usually a four-layer composite glass screen.
  • the user's finger touches the capacitive touch display panel the user and the surface of the capacitive touch display panel form a coupling capacitor due to the human body electric field (for high frequency In terms of current, the capacitor can be regarded as a conductor. Therefore, the finger sucks a small current from the touch point on the surface of the capacitive touch display panel. This current flows out from the electrodes on the four corners of the capacitive touch display panel. .
  • the current flowing through the four electrodes is proportional to the distance from the finger to the four corners.
  • the controller calculates the position of the touch point by accurately calculating the ratio of the four currents.
  • Force Touch is a touch sensing technology applied to liquid crystal displays.
  • the display device can sense the user's light pressure on the screen and the strength of the pressure, thereby achieving more touch operations.
  • the purpose of the present disclosure is to implement a pressure touch function with minimal modifications to the touch display panel structure in the related art.
  • an embodiment of the present disclosure provides a touch display panel including an array substrate, a pair of card substrates disposed opposite the array substrate, and a side of the array substrate disposed adjacent to the substrate of the substrate. a touch electrode, and an antistatic layer disposed inside the touch display panel.
  • the antistatic layer is located on a side of the pair of the substrate adjacent to the touch electrode, and the antistatic layer can form a capacitive pressure sensor with the touch electrode after loading the pressure scan signal.
  • the resistivity of the antistatic layer is not less than a preset threshold.
  • the touch display panel further includes: a black matrix disposed between the pair of the substrate and the antistatic layer, wherein the antistatic layer is further disposed with a resistivity lower than a side of the touch electrode
  • the auxiliary electrode of the antistatic layer; the auxiliary electrode is disposed in the projection area of the black matrix in the antistatic layer, and is electrically connected to the antistatic layer.
  • the touch display panel further includes: a data line and a gate line;
  • the auxiliary electrode includes: a plurality of first auxiliary electrodes extending in the same direction as the gate lines, and a plurality of second auxiliary electrodes extending in the same direction as the data lines, the first auxiliary electrodes and the second auxiliary electrodes are spaced apart from each other .
  • the auxiliary electrode comprises:
  • auxiliary electrode and a fourth auxiliary electrode wherein the third auxiliary electrode and the fourth auxiliary electrode have a well-shaped structure and are spaced apart from each other and uniformly distributed in the antistatic layer and the touch electrode region Partially.
  • the antistatic layer has an overall resistance of not less than 108 ⁇ and not more than 1010 ⁇ .
  • the overall resistance of the antistatic layer is 108 ⁇ .
  • the present disclosure further provides a touch display device including the touch display panel, the touch display device further includes: a driving module, configured to perform a pressure scanning phase of the touch display device The antistatic layer is loaded with a pressure scan signal.
  • the touch display panel further includes:
  • a detecting module configured to detect a capacitance change value of a mutual capacitance formed between the antistatic layer and the touch electrode during a pressure scanning phase
  • a processing module configured to determine a corresponding pressure value according to the capacitance change value detected by the detection module.
  • the driving module is further configured to load a common electrode signal to the touch electrode during a display phase of the touch display device, and to the touch control stage of the touch display device The electrodes are loaded with a touch scan signal.
  • the pressure scan signal is a common electrode signal.
  • the present disclosure further provides a driving method applied to the touch display device, wherein the driving method includes:
  • a pressure scan signal is applied to the antistatic layer.
  • the driving method may further include:
  • the touch scan signal is loaded to the touch electrode during the touch scanning phase.
  • a common electrode signal is applied to the antistatic layer to the touch electrode during a display phase; and the antistatic layer is in a floating state during a touch detection phase.
  • the common electrode signal is loaded to the touch electrode, and the touch scan signal is loaded to the antistatic layer.
  • the anti-static layer originally disposed on the outside of the touch display panel is disposed on the inner side of the touch display panel for use as an electrode.
  • a pressure detecting phase is additionally added, in which the pressure scanning signal is applied to the antistatic layer.
  • the antistatic layer is transformed by the capacitance between the deformation and the touch electrode, so that the pressure of the user's finger on the screen can be determined according to the change in the capacitance. Since the antistatic layer is a layer in the related art, a new electrode layer is not formed in the structure of the original touch display panel in the present disclosure.
  • FIG. 1 is a schematic structural view of a touch display panel of the present disclosure
  • FIG. 2 is a schematic structural diagram of a touch display panel of the present disclosure in some implementation manners
  • FIG. 3 and FIG. 4 are two schematic structural views of the antistatic layer of the present disclosure after the auxiliary electrode is disposed;
  • FIG. 5 is a schematic diagram of a specific structure of a touch display device of the present disclosure in some implementation manners
  • FIG. 6 is a timing diagram of a driving method of the present disclosure in some implementations.
  • an antistatic layer is disposed on the outer side of the screen, and the antistatic layer can function as an electrostatic discharge. Since the antistatic layer has a certain conductivity in the capacitive touch display panel, the solution of the present disclosure uses the antistatic layer as an electrode and forms a capacitive type with the touch electrode for detecting the screen pressure. sensor.
  • the embodiment of the present disclosure provides a touch display panel, as shown in FIG. 1 , including an array substrate, a pair of card substrates disposed opposite to the array substrate, and a side of the array substrate disposed adjacent to the substrate of the substrate
  • the touch electrode 3 and the antistatic layer 2 for discharging static electricity.
  • the antistatic layer After the pressure scan signal is applied to the screen 1 of the display panel, a capacitive pressure sensor can be formed with the touch electrode 3.
  • the antistatic layer 2 is deformed, and the capacitance between the touch electrode and the touch electrode is changed, so that the pressure applied by the user to the screen can be quantified according to the change in the capacitance. Since the antistatic layer is a layer in the related art, the embodiment of the present disclosure does not create a new electrode layer on the structure of the original touch display panel, and thus does not increase the thickness of the touch display panel.
  • the touch electrode starts to load the touch scan signal.
  • the antistatic layer can be made of a high resistance material. Therefore, the resistivity is not less than a predetermined threshold, and the preset threshold is a reasonable value that can ensure the pass rate of the antistatic layer signal.
  • the overall resistance of the antistatic layer can be between 108 ⁇ and 1010 ⁇ , and optionally 108 ⁇ .
  • the embodiment further includes a black matrix disposed between the counter substrate and the antistatic layer, and further disposed on the side of the antistatic layer adjacent to the touch electrode.
  • the resistivity of the auxiliary electrode is less than the antistatic increase, and is disposed in the projection area of the black matrix in the antistatic layer, thereby avoiding occlusion of the display area.
  • the antistatic layer of the embodiment can adjust the overall resistance value through the auxiliary electrode, thereby narrowing the difference between the resistance and the touch electrode within a reasonable range.
  • the touch display panel of this embodiment will be described in detail below with reference to an implementation manner.
  • the touch display panel of the present embodiment includes a pair of oppositely disposed pair of substrates (the substrate located at the upper portion of the liquid crystal layer in FIG. 2) and an array substrate (the substrate at the lower portion of the liquid crystal layer in FIG. 2).
  • the touch electrodes of the touch display panel are multiplexed with the common electrodes, that is, the layer 3 on the array substrate represents the common electrode and the touch electrode.
  • the pixel substrate P and the gate line G are mainly included on the array substrate.
  • the substrate on the counter substrate mainly includes a black matrix BM and an antistatic layer 2.
  • the antistatic layer 2 is further provided with an auxiliary electrode 21 (which may be composed of a conductive material such as ITO or metal), and the auxiliary electrode 21 is located in the projection area of the black matrix BM in the antistatic layer 2, and the antistatic layer Electrical connection.
  • auxiliary electrode 21 which may be composed of a conductive material such as ITO or metal
  • the auxiliary electrode 21 is located in the projection area of the black matrix BM in the antistatic layer 2, and the antistatic layer Electrical connection.
  • anti-static The portion of the electrical layer 2 that overlaps at least the touch electrode 3 functions as an electrode. Therefore, as an alternative, the auxiliary electrode 21 is evenly distributed at least on the overlapping area of the antistatic layer 2 and the touch electrode, thereby reducing the antistatic layer. 2 as the resistance of the electrode portion.
  • the auxiliary electrode of the present implementation may be plural, including the first auxiliary electrode 21A extending in the same direction as the gate line (ie, the horizontal line in FIG. 3), and the same as the data line.
  • the second auxiliary electrode 21B extending in the direction (ie, the lateral line in FIG. 3).
  • the first auxiliary electrode 21A and the second auxiliary electrode are spaced apart from each other by 21B.
  • the auxiliary electrode of the present embodiment includes a third auxiliary electrode 21C and a fourth auxiliary electrode 21D in a well-shaped structure.
  • the third auxiliary electrode 21C and the fourth auxiliary electrode 21D there is a gap between the third auxiliary electrode 21C and the fourth auxiliary electrode 21D, and the interval length is h.
  • the overall resistance of the antistatic layer 2 can be set within a reasonable range by adjusting the size of h (for example, 1.5 ⁇ m to 2.5 ⁇ m).
  • auxiliary electrode arrangement shown in FIG. 3 and FIG. 4 is only a feasible implementation manner. In practical applications, those skilled in the art can assist the resistivity according to the antistatic layer.
  • the electrodes are appropriately changed, for example, the auxiliary electrodes may be connected to each other, or the auxiliary electrodes may have an irregular distribution structure, or no auxiliary electrodes may be provided.
  • the anti-static layer originally disposed on the outer side of the screen of the touch display panel is instead disposed on the inner side of the screen and used as an electrode, thereby being used in the original touch.
  • the pressure touch function is realized with minor modifications.
  • another embodiment of the present disclosure further provides a touch display device including the above touch display panel.
  • the touch display device further includes a driving module (such as an IC circuit) based on the touch display panel.
  • the driving module is configured to apply a pressure scan signal to the antistatic layer when the touch display device is in a pressure scanning phase.
  • the touch display device of this embodiment further includes a detection module and a processing module.
  • the detecting module is configured to detect a capacitance change value of a mutual capacitance formed between the antistatic layer and the touch electrode during the pressure scanning phase;
  • the processing module is configured to determine a corresponding pressure value according to the capacitance change value detected by the detecting module.
  • the capacitor formed by the touch electrode is charged and discharged.
  • the charging and discharging of the capacitor is changed due to the deformation of the antistatic layer.
  • the detecting module of the embodiment can determine the change value of the capacitance value according to the change of the charging and discharging of the capacitor.
  • a threshold of a charge and discharge change amount of the capacitor may be set in the processing module. When the change is greater than the threshold, the processing module determines the intention of the user to press the display panel, thereby completing the subsequent pressure operation.
  • the driving module of the embodiment can also load the touch scan signal and the common electrode signal on the touch electrode in a time-sharing manner. That is, when the touch display device enters the display phase, the driving module loads the common electrode signal to the touch electrode; when the touch display device enters the touch scanning phase, the driving module loads the touch scan to the touch electrode. signal.
  • the touch display device of the present implementation further includes a driving module 4 , a detecting module 5 , and a processing module 6 based on the touch display panel structure illustrated in FIG. 2 .
  • the array substrate is provided with the output ends 41, 42 of the drive module 4.
  • the antistatic layer 2 on the substrate of the cassette is connected to the output terminal 41 via a conductive paste TR, thereby loading a pressure scan signal from the drive module 4 during the pressure detecting phase.
  • the touch electrode 3 on the array substrate is connected to the output terminal 42. During the touch scanning phase, the touch scan signal from the drive module 4 is loaded, and the common electrode signal from the drive module 4 is loaded during the display phase.
  • the array substrate of the present embodiment is further provided with an input end 51 of the detecting module 5, the input end 51 is directly connected to the touch electrode 3, and the antistatic layer 2 is connected to the touch electrode 3 through the conductive adhesive TR.
  • the anti-static layer 2 is loaded with a pressure detecting signal, and the detecting module 5 can detect the capacitance change value of the mutual capacitance between the antistatic layer 2 and the touch electrode 3, and the processing module 6 detects the capacitance according to the detecting module. Change the value to determine the corresponding pressure value.
  • the touch display device of the present implementation. It should be noted that the structure shown in FIG. 4 is only an exemplary introduction. As another feasible solution, the touch electrode and the common electrode may also be two different electrode layers. The touch electrodes may be disposed on the array substrate or disposed on the counter substrate under the antistatic layer.
  • another embodiment of the present disclosure further provides a driving method, which can be applied to the above driving module, including:
  • a pressure sweep signal is applied to the antistatic layer.
  • the driving method of the present disclosure may be applied to the technical solution of the touch electrode and the common electrode multiplexing, and thus may further include:
  • the touch scan signal is loaded to the touch electrode during the touch scanning phase.
  • the present disclosure adds a pressure detection phase (ie, one unit frame time, and then uses a part of time to the pressure detection phase) on the basis of the time division driving of the original display phase and the touch scanning phase.
  • a pressure detection phase ie, one unit frame time, and then uses a part of time to the pressure detection phase
  • the touch electrode acts as a common electrode and is connected to the Vcom potential for controlling liquid crystal deflection.
  • the antistatic layer is used to discharge static electricity from the screen.
  • the Vcom potential is also connected in this implementation.
  • the touch scan signal in the form of a touch electrode is used to detect a user's touch operation on the screen.
  • the antistatic layer is used to release static electricity from the screen as in the display phase.
  • the antistatic layer is in a floating state.
  • the floating state is only an optional method. In practical applications, since the overall resistance of the antistatic layer can reach the order of several megaohms, even if the Vcom potential is applied, the penetration of the touch scan signal is not generated. Too much impact.
  • the touch electrode and the antistatic layer form a capacitive pressure sensor, and the antistatic layer is connected to a fixed potential pressure scanning signal (such as Vcom potential in FIG. 6), and the touch electrode is connected to the pulse signal (FIG. 6).
  • the touch scan signal is such that the capacitor structure is charged and discharged during the pressure scanning phase.
  • the antistatic layer is connected to the pulsed pressure scanning signal, and the touch electrode is connected to a fixed potential.
  • the touch scanning phase can be set to occupy only a small portion of the time frame of the unit time, such as about 2ms, relative to 16.67ms of an entire frame, even if the antistatic layer is in contact
  • the scan phase is in a floating state and does not affect the display.
  • the touch display device of the present disclosure in conjunction with the driving method of the present disclosure, enables the display panel to simultaneously implement both In Cell Touch and pressure touch functions.

Abstract

一种触控显示面板、触控显示装置及驱动方法。触控显示面板包括阵列基板、与阵列基板相对设置的对盒基板、设置在阵列基板靠近对盒基板一侧的触控电极（3）、以及设置在触控显示面板内部的抗静电层（2）。抗静电层（2）位于所述对盒基板靠近触控电极（3）的一侧，抗静电层（2）在加载压力扫描信号后，与触控电极（3）构成电容式的压力传感器。将原有设置在触控显示面板外侧的抗静电层（2），改设在触控显示面板内侧，以作为电极使用。在驱动方法中，额外增加一压力检测阶段，在该阶段内，向抗静电层（2）加载压力扫描信号。当用户手指按压屏幕后，抗静电层（2）因形变与触控电极（3）之间的电容发生变化，进而根据该电容变化确定用户手指对屏幕的压力。

Description

触控显示面板、触控显示装置及驱动方法
相关申请的交叉引用
本申请主张在2015年11月3日在中国提交的中国专利申请No.201510740082.8的优先权，其全部内容通过引用包含于此。
技术领域
本公开文本涉及液晶显示领域，特别是一种触控显示面板、触控显示装置及驱动方法。
背景技术
目前，触控显示面板被越来越多地使用在电子产品上，其中电容式触控显示面板是触控显示面板中最常用的一种。
电容式触控显示面板利用人体的电流感应进行工作。电容式触控显示面板通常是一块四层复合玻璃屏，当用户的手指触摸在电容式触控显示面板上时，由于人体电场，用户和电容式触控显示面板表面形成耦合电容(对于高频电流来说，电容可以视为导体)，于是手指从电容式触控显示面板表面的触控点吸走一个很小的电流，这个电流分别从电容式触控显示面板的四角上的电极中流出。流经这四个电极的电流与手指到四角的距离成正比，控制器通过对这四个电流比例的精确计算，得出触摸点的位置。
压力触控(Force Touch)是一种应用于液晶显示器的触摸传感技术。通过压力触控技术，显示设备可以感知用户对屏幕的轻压以及重压的力度，从而实现更多的触控操作。
针对结构已日益成熟的相关技术中的触摸屏，如何以最小改动，实现压力触控功能，是本公开文本所要解决的技术问题。
发明内容
本公开文本目的是针对相关技术中的触控显示面板结构，以最小的改动实现压力触控功能。
为实现上述发明目的，一方面本公开文本的实施例提供一种触控显示面板，包括阵列基板、与所述阵列基板相对设置的对盒基板、设置在所述阵列基板靠近对盒基板一侧的触控电极，以及设置在所述触控显示面板内部的抗静电层。
所述抗静电层位于所述对盒基板靠近触控电极的一侧，所述抗静电层在加载压力扫描信号后，能够与所述触控电极构成电容式的压力传感器。
可选地，所述抗静电层的电阻率不小于预设阈值。
可选地，所述触控显示面板还包括：设置在所述对盒基板与抗静电层之间的黑矩阵，所述抗静电层靠近所述触控电极的一侧还设置有电阻率小于所述抗静电层的辅助电极；所述辅助电极设置于所述黑矩阵在抗静电层的投影区域内，且与所述抗静电层电连接。
可选地，所述触控显示面板还包括：数据线和栅线；
所述辅助电极包括：与栅线同一方向延伸的多个第一辅助电极，以及与数据线同一方向延伸的多个第二辅助电极，所述第一辅助电极与所述第二辅助电极相互间隔。
或者，所述辅助电极包括：
第三辅助电极和第四辅助电极，所述第三辅助电极和第四辅助电极均呈井字型结构，且相互间隔，并均匀分布在所述抗静电层与所述触控电极区域重合的部分上。
可选地，所述抗静电层的整体阻值不小于108Ω并且不大于1010Ω。
可选地，所述抗静电层的整体阻值为108Ω。
另一方面，本公开文本还提供一种包括上述触控显示面板的触控显示装置，所述触控显示装置进一步包括：驱动模块，用于在所述触控显示装置的压力扫描阶段向所述抗静电层加载压力扫描信号。
可选地，所述触控显示面板还包括：
检测模块，用于在压力扫描阶段检测所述抗静电层与所述触控电极之间形成的互电容的电容变化值；以及
处理模块，用于根据所述检测模块检测的电容变化值，确定对应的压力值。
可选地，所述驱动模块还用于在所述触控显示装置的显示阶段向所述触控电极，加载公共电极信号，在所述触控显示装置的触控扫描阶段向所述触控电极加载触控扫描信号。
可选地，所述压力扫描信号是公共电极信号。
另一方面，本公开文本还提供一种应用于上述触控显示装置的驱动方法，所述驱动方法包括：
在压力检测阶段，向所述抗静电层加载压力扫描信号。
可选地，所述驱动方法还可以包括：
在显示阶段向所述触控电极，加载公共电极信号；
在触控扫描阶段向所述触控电极加载触控扫描信号。
可选地，在显示阶段向所述触控电极，向所述抗静电层加载公共电极信号；在触控检测阶段，所述抗静电层处于浮置状态。
可选地，在压力扫描阶段，向所述触控电极加载公共电极信号，并且向所述抗静电层加载触控扫描信号。
本公开文本的上述技术方案的有益效果如下：
本公开文本的方案将原有设置在触控显示面板外侧的抗静电层，设置在触控显示面板内侧，以作为电极使用。在相关技术中的驱动方法的单位时间帧中，额外增加一压力检测阶段，在该阶段内，向抗静电层加载压力扫描信号。当用户手指按压屏幕后，抗静电层因形变与触控电极之间电容发生变换，从而能够根据该电容变化确定用户手指对屏幕的压力。由于抗静电层是相关技术中的图层，因此本公开文本中并不会在原有触控显示面板的结构上制作新的电极图层。
附图说明
为了更清楚地说明本申请实施例或相关技术中的技术方案，下面将对实施例或相关技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请中记载的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。以下附图并未刻意按实际尺寸等比例缩放绘制，重点在于示出本申请的主旨。
图1为本公开文本的触控显示面板的结构示意图；
图2为本公开文本的触控显示面板在一些实现方式中的具体结构示意图；
图3和图4为本公开文本的抗静电层设置辅助电极后的两种结构示意图；
图5为本公开文本的触控显示装置在一些实现方式中的具体结构示意图；以及
图6为本公开文本的驱动方法在一些实现方式中的时序示意图。
具体实施方式
为使本公开的实施例的目的、技术方案和优点更加清楚，下面将结合本公开的实施例的附图，对本公开的实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开文本保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”或者“一”等类似词语也不表示数量限制，而是表示存在至少一个。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也相应地改变。
在相关技术中的电容式触控显示面板，为防止静电击穿屏幕，会在屏幕外侧设置抗静电层，该抗静电层能够起到静电释放的作用。由于抗静电层在电容式的触控显示面板中，本身就具有一定导电性，因此本公开文本的方案将抗静电层作为一个电极，并与触控电极形成一用于检测屏幕压力的电容式传感器。
基于上述方案，本公开文本实施例提供一种触控显示面板，如图1所示，包括阵列基板、与阵列基板相对设置的对盒基板，以及设置在该阵列基板靠近对盒基板一侧的触控电极3和用于释放静电的抗静电层2。该抗静电层位 于显示面板的屏幕1内，加载压力扫描信号后，能够与触控电极3构成电容式的压力传感器。当用户通过手指按压屏幕后，抗静电层2发生形变，改变与触控电极之间的电容大小，从而能够根据该电容变化量化出用户对屏幕施加的压力。由于抗静电层是相关技术中的图层，因此本公开文本的实施例并不会在原有触控显示面板的结构上制作新的电极图层，因而不会增加触控显示面板的厚度。
当然，在触控显示面板进入触控扫描阶段，触控电极开始加载触控扫描信号，为了保证触控扫描信号能够有效穿过抗静电层到达屏幕，抗静电层可选使用高阻材料制成，以使电阻率不小于一预设阈值，该预设阈值即为能够保证抗静电层信号通过率的合理数值。在实际应用中，抗静电层的整体阻值可以在108Ω至1010Ω之间，可选为108Ω。
进一步地，虽然抗静电层与触控电极可以组成一个电容，但显然电容高阻材料的一端阻值非常大，在充放电的时候由于其产生的电流非常小，影响了电容充放电的作用，造成压力触控的检测不够灵敏。为避免上述现象发生，作为可选方案，本实施例还包括设置在对盒基板与抗静电层之间的黑矩阵，在抗静电层靠近触控电极的一侧还进一步设置有与该触控电极点连接的辅助电极。辅助电极的电阻率小于抗静电增，并设置于黑矩阵在抗静电层的投影区域内，从而避免遮挡显示区域。本实施例的抗静电层通过辅助电极可调整整体的阻值大小，从而在合理范围内，缩小与触控电极的阻值差距。
下面结合一个实现方式对本实施例的触控显示面板，进行详细介绍。
如图2所示，本实现方式的触控显示面板包括相对设置的对盒基板(图2中位于液晶层上部的基板)以及阵列基板(图2中位于液晶层下部的基板)。作为示例性介绍，在本实现方式中，触控显示面板的触控电极与公共电极复用，即阵列基板上的图层3即表示公共电极，又表示触控电极。
在阵列基板上主要还包括像素电极P，栅线G。在对盒基板的衬底上主要包括：黑矩阵BM和抗静电层2。
具体地，抗静电层2上还进一步设置有辅助电极21(可以由ITO、金属等导电材料构成)，该辅助电极21位于黑矩阵BM在抗静电层2的投影区域内，且与抗静电层电连接。这里需要给予说明的是，在压力扫描阶段，抗静 电层2至少与触控电极3重合的部分起到电极作用，因此作为可选方案，布置的辅助电极21至少在抗静电层2与触控电极的重合区域上均匀分布，从而降低抗静电层2作为电极部分的阻值。
作为示例性介绍，参考图3所示，本实现方式的辅助电极可以为多个，包括与栅线同一方向延伸的第一辅助电极21A(即图3中的横向线条)，以及与数据线同一方向延伸的第二辅助电极21B(即图3中的横向线条)。其中，为不改变抗静电层高阻的特性，第一辅助电极21A与第二辅助电极之间相互间隔21B。
或者参考图4所示，本实现方式的辅助电极包括呈井字型结构的第三辅助电极21C以及第四辅助电极21D。同理，为不改变抗静电层高阻的特性，第三辅助电极21C与第四辅助电极21D之间存在间隔，间隔长度为h。在具体实施时，可通过调整h的大小(如1.5μm至2.5μm)，使抗静电层2的整体阻值设置在一个合理范围内。
当然，需要给予说明的，图3和图4所示的辅助电极布置结构仅仅是一种可行的实现方式，在实际应用中，本领域技术人员可以根据抗静电层针对电阻率的需求，对辅助电极进行适当变化，如：各辅助电极之间可以相互连接，或者各辅助电极成不规律的分布结构，再或者不设置辅助电极。
以上是本实施例的触控显示面板介绍，可以知道，本公开文本将原先设置在触控显示面板的屏幕外侧的抗静电层，改为设置在屏幕内侧，作为电极使用，从而在原有触控显示面板的结构基础上，以较小改动实现了压力触控功能。
此外，本公开文本的另一实施例还提供一种包括上述触控显示面板的触控显示装置，该触控显示装置在上述触控显示面板基础上进一步包括有驱动模块(如IC电路)。驱动模块可用于在触控显示装置处于压力扫描阶段时向所述抗静电层加载压力扫描信号。
进一步地，本实施例的触控显示装置还包括检测模块和处理模块。
检测模块用于在压力扫描阶段检测抗静电层与触控电极之间形成的互电容的电容变化值；
处理模块用于根据检测模块检测的电容变化值，确定对应的压力值。
在实际应用中，当抗静电层加载压力扫描信号后，其与触控电极形成的电容进行充放电。当用户的手指按压显示面板后，由于抗静电层发生形变，使得电容充放电发生改变，本实施例的检测模块可以根据电容充放电的变化确定电容值的变化值。此外，本实施例还可以在处理模块设置一个电容充放电变化量的阈值，当变化大于这个阈值后，处理模块确定用户按压显示面板的意图，进而完成后续的压力操作。
此外，作为可选方式，若触控电极与公共电极复用，则本实施例的驱动模块还可以分时在触控电极上加载触控扫描信号和公共电极信号。即，当触控显示装置进入显示阶段时，驱动模块向所述触控电极，加载公共电极信号；当触控显示装置进入触控扫描阶段时，驱动模块向所述触控电极加载触控扫描信号。
下面结合一个实现方式，对本实施例的触控显示装置的结构进行详细介绍。
参考图5，本实现方式的触控显示装置，在图2所示的触控显示面板结构的基础上进一步包括：驱动模块4、检测模块5以及处理模块6。
其中，阵列基板设置有驱动模块4的输出端41、42。对盒基板上的抗静电层2通过导电胶TR与输出端41连接，从而在压力检测阶段，加载来自驱动模块4上的压力扫描信号。阵列基板上的触控电极3与输出端42连接，在触控扫描阶段，加载来自驱动模块4上的触控扫描信号，并在显示阶段，加载来自驱动模块4上的公共电极信号。
此外，本实现方式的阵列基板还设置有检测模块5的输入端51，该输入端51直接与触控电极3连接，且抗静电层2通过导电胶TR与触控电极3连接。在压力检测阶段，抗静电层2上加载压力检测信号，检测模块5能够检测抗静电层2与触控电极3之间的互电容的电容变化值，且处理模块6根据检测模块检测到的电容变化值，确定对应的压力值。
以上是本实现方式的触控显示装置，需要指出的是，图4所示的结构仅作为示例性介绍，作为其他可行方案，触控电极与公共电极也可以是两个不同的电极图层，且触控电极可以设置在阵列基板上，或者设置在对盒基板上位于抗静电层的下方。
此外，针对上述触控显示装置，本公开文本的另一实施例还提供一种驱动方法，该驱动方法可以应用于上述驱动模块，包括：
在触控扫描阶段，向触控电极加载触控扫描信号；
在压力检测阶段，向抗静电层加载压力扫描信号。
当然，作为可选方案，本公开文本的驱动方法可以适用于触控电极和公共电极复用的技术方案，因此还可以进一步包括：
在显示阶段向所述触控电极，加载公共电极信号；
在触控扫描阶段向所述触控电极加载触控扫描信号。
下面结合一个实现方式，对本实施例的驱动方法进行详细介绍。
如图6所示，本公开文本在原有显示阶段与触控扫描阶段分时驱动的基础上，添加了一个压力检测阶段(即一单位帧时间内，再使用一部分时间给压力检测阶段)。
在显示阶段，触控电极作为公共电极，接Vcom电位，用于控制液晶偏转。而抗静电层则用于释放屏幕外来的静电，为避免对公共电极产生干扰，在本实现方式中同样接Vcom电位。
在触控扫描阶段，触控电极接脉冲形式的触控扫描信号，用于检测用户在屏幕上的触控操作。而抗静电层则与显示阶段一样，还是用于释放屏幕外来的静电，但为保证触控扫描信号能够有效穿过抗静电层，抗静电层处于浮置(Floating)状态。当然，浮置状态只是一种可选方式，在实际应用中，由于抗静电层总体阻值可以达到几兆欧的数量级，即便接Vcom电位，也不会对触控扫描信号的穿透性产生太大的影响。
在压力扫描阶段，触控电极与抗静电层形成电容式的压力传感器，抗静电层接入固定电位的压力扫描信号(如图6中的Vcom电位)，触控电极接脉冲信号(如图6中的触控扫描信号)，以使该电容结构在压力扫描阶段进行充放电。或者相反，抗静电层接入脉冲式的压力扫描信号，而触控电极接固定电位。当用户通过手指按压屏幕后，电容的充放电发生变化，进而判断电容的改变。
此外，在具体实施过程中，可以设置触控扫描阶段只占用单位时间帧的一小部分时间，如2ms左右，相对与一整帧的16.67ms，即便抗静电层在触 控扫描阶段处于浮置状态，也不会对显示造成影响。
综上所述，本公开文本的触控显示装置结合本公开文本的驱动方法，可以使显示面板同时实现内嵌式触控(In Cell Touch)和压力触控两种功能。
以上所述是本公开文本的可选实施方式。应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开文本所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开文本的保护范围。

Claims (15)

  1. 一种触控显示面板，包括：
    阵列基板；
    与所述阵列基板相对设置的对盒基板；
    设置在所述阵列基板靠近对盒基板一侧的触控电极；以及
    设置在所述触控显示面板内部的抗静电层，所述抗静电层位于所述对盒基板靠近触控电极的一侧，所述抗静电层在加载压力扫描信号后，能够与所述触控电极构成电容式的压力传感器。
  2. 根据权利要求1所述的触控显示面板，其中，所述抗静电层的电阻率不小于预设阈值。
  3. 根据权利要求2所述的触控显示面板，还包括设置在所述对盒基板与抗静电层之间的黑矩阵，所述抗静电层靠近所述触控电极的一侧还设置有电阻率小于所述抗静电层的辅助电极；
    其中，所述辅助电极设置于所述黑矩阵在抗静电层的投影区域内，且与所述抗静电层电连接。
  4. 根据权利要求3所述的触控显示面板，其中
    所述触控显示面板还包括：数据线和栅线；
    所述辅助电极包括：与栅线同一方向延伸的多个第一辅助电极，以及与数据线同一方向延伸的多个第二辅助电极，所述第一辅助电极与所述第二辅助电极相互间隔。
  5. 根据权利要求3所述的触控显示面板，其中，
    所述辅助电极包括：第三辅助电极和第四辅助电极，所述第三辅助电极和第四辅助电极均呈井字型结构，且相互间隔，并均匀分布在所述抗静电层与所述触控电极的重合区域的部分上。
  6. 根据权利要求2所述的触控显示面板，其中，所述抗静电层的整体阻值不小于108Ω并且不大于1010Ω。
  7. 根据权利要求2所述的触控显示面板，其中，所述抗静电层的整体阻值为108Ω。
  8. 一种触控显示装置，包括如权利要求1-7中任一项所述的触控显示面板，并且，所述触控显示装置还包括：
    驱动模块，用于在所述触控显示装置的压力扫描阶段向所述抗静电层加载压力扫描信号。
  9. 根据权利要求8所述的触控显示装置，还包括：
    检测模块，用于在压力扫描阶段检测所述抗静电层与所述触控电极之间形成的互电容的电容变化值；以及
    处理模块，用于根据所述检测模块检测到的电容变化值，确定对应的压力值。
  10. 根据权利要求9所述的触控显示装置，其中，
    所述驱动模块还用于在所述触控显示装置的显示阶段向所述触控电极加载公共电极信号，并且在所述触控显示装置的触控扫描阶段向所述触控电极加载触控扫描信号。
  11. 根据权利要求8所述的触控显示装置，其中，所述压力扫描信号是公共电极信号。
  12. 一种触控显示装置的驱动方法，应用于如权利要求8-11中任一项所述的触控显示装置，其中，所述驱动方法包括：
    在压力检测阶段，向所述抗静电层加载压力扫描信号。
  13. 根据权利要求12所述的驱动方法，还包括：
    在显示阶段，向所述触控电极加载公共电极信号；以及
    在触控扫描阶段，向所述触控电极加载触控扫描信号。
  14. 根据权利要求13所述的驱动方法，还包括：
    在显示阶段，向所述抗静电层加载公共电极信号；以及
    在触控检测阶段，使得所述抗静电层处于浮置状态。
  15. 根据权利要求12所述的驱动方法，还包括：
    在压力扫描阶段，向所述触控电极加载公共电极信号，并且向所述抗静电层加载触控扫描信号。
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