WO2017181740A1 - 触控显示面板及其驱动方法 - Google Patents

触控显示面板及其驱动方法 Download PDF

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Publication number
WO2017181740A1
WO2017181740A1 PCT/CN2017/070272 CN2017070272W WO2017181740A1 WO 2017181740 A1 WO2017181740 A1 WO 2017181740A1 CN 2017070272 W CN2017070272 W CN 2017070272W WO 2017181740 A1 WO2017181740 A1 WO 2017181740A1
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Prior art keywords
touch
electrode
display panel
sub
electrodes
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PCT/CN2017/070272
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English (en)
French (fr)
Inventor
徐智强
赵家阳
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to EP17737461.8A priority Critical patent/EP3447618B1/en
Priority to US15/544,986 priority patent/US10379686B2/en
Publication of WO2017181740A1 publication Critical patent/WO2017181740A1/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
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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
    • 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
    • G06F3/0447—Position sensing using the local deformation of sensor cells
    • 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
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • 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
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present application belongs to the field of liquid crystal display, and in particular, to a touch display panel and a driving method thereof.
  • touch display panels are increasingly being applied to various electronic products, such as smart phones, notebook computers, tablet computers, and the like.
  • the touch display panel can be divided into four types: resistive, capacitive, optical, and acoustic.
  • the current mainstream touch technology is capacitive.
  • the existing capacitive touch display panel is thicker and cannot be used in combination with ordinary touch and pressure touch.
  • This application is intended to address at least one of the problems in the prior art.
  • a touch display panel includes: a first touch electrode, the first touch electrode is an integral electrode; a second touch electrode, the second touch electrode and the second a touch electrode is opposite to each other and includes a plurality of second touch sub-electrodes; and a detecting unit, wherein the detecting unit is configured to detect a capacitance between each of the second touch sub-electrodes of the first touch electrode and the second touch electrode The value changes and corresponds to the change in capacitance value The position of the second touch sub-electrode determines the touch position.
  • the touch display panel further includes a control unit, and the detecting unit is further configured to detect between the first touch electrodes and the second touch sub-electrodes of the second touch electrodes.
  • the control unit is configured to determine the magnitude of the pressure applied to the touch display panel according to the magnitude of the change in the capacitance value between the first touch electrode and the corresponding second touch sub-electrode to control The touch display panel performs different operations.
  • control unit is further configured to: when the change in the capacitance value between the first touch electrode and the corresponding second touch sub-electrode is less than a first preset value, Controlling the display panel to perform the first operation; and/or when the capacitance value change between the first touch electrode and the corresponding second touch sub-electrode is greater than the first preset value and less than the second preset value, The touch display panel performs a second operation different from the first operation; and/or when the capacitance value change between the first touch electrode and the corresponding second touch sub-electrode is greater than the second preset value And causing the touch display panel to perform a third operation different from the first operation and the second operation.
  • the second touch sub-electrode is simultaneously used as a common electrode of the touch display panel.
  • each of the second touch sub-electrodes includes at least one sub-common electrode, and the sub-common electrodes in each of the second touch sub-electrodes are connected together, and the adjacent second touches The sub-common electrodes in the electrodes are independent of each other and are respectively connected to the external chip through leads.
  • the touch display panel further includes a first substrate and a second substrate disposed opposite to each other; the first touch electrode is disposed on the first substrate, and the second touch electrode is disposed on the second substrate .
  • the first substrate is one of a color film substrate and an array substrate
  • the second substrate is the other of the color film substrate and the array substrate
  • the liquid crystal layer is between the first substrate and the second substrate
  • a touch display panel driving method includes: a first touch electrode and a plurality of second touch electrodes a second touch electrode; the driving method includes: inputting a waveform signal to the second touch electrode to charge and discharge the capacitance between the first touch electrode and the second touch electrode; detecting the first touch a change in capacitance between the control electrode and each of the second touch sub-electrodes of the second touch electrode; and determining a touch position according to a position of the corresponding second touch sub-electrode that changes in capacitance value.
  • the driving method further includes: simultaneously detecting a change in a capacitance value between the first touch electrode and the plurality of second touch sub-electrodes; and a plurality of corresponding second changes according to the generated capacitance value
  • the position of the touch sub-electrode determines a plurality of touch positions.
  • the driving method further includes: detecting, by the detecting unit, a magnitude of a change in a capacitance value between each of the second touch sub-electrodes of the first touch electrode and the second touch electrode; When the value change is less than the first preset value, the touch display panel is controlled to perform a first operation; when the change in the capacitance value is greater than the first preset value is less than the second preset value, the control touch display panel performs differently The second operation of the first operation.
  • the driving method further includes: when the capacitance value changes by the second preset value, controlling the touch display panel to perform a third operation different from the first operation and the second operation.
  • the first operation, the second operation, and the third operation are respectively an operation selected from a click operation, an operation of a popup menu, and an operation of uninstalling an application.
  • a change in capacitance value between the first touch electrode and each of the second touch sub-electrodes is detected according to a change in discharge time of each of the second touch sub-electrodes.
  • the display signal and the touch signal are alternately controlled in a time division multiplexing manner.
  • FIG. 1 is a schematic diagram of a touch display panel according to an embodiment of the present application.
  • FIGS. 2(A)-2(B) are schematic diagrams showing the structure of a pixel unit of a touch display panel according to an embodiment of the present application
  • FIG. 3 is a schematic diagram showing the wiring of the second touch sub-electrode of the touch display panel according to an embodiment of the present application.
  • FIG. 4 is a schematic view showing an arrangement of a second touch sub-electrode serving as a common electrode according to an embodiment of the present application
  • FIG. 5(A)-(B) are schematic diagrams of touch of a touch display panel according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram showing time-division touch of a touch display panel according to an embodiment of the present application.
  • FIG. 7 is a flowchart illustrating a driving method of a touch display panel according to an embodiment of the present application.
  • Figures 8(A)-(D) are schematic diagrams of capacitance sensing.
  • a touch display panel includes: a first substrate and a second substrate; a first touch electrode disposed on the first substrate, wherein the first touch electrode is An integral electrode; a second touch electrode disposed on the second substrate, the second touch electrode includes a plurality of second touch sub-electrodes; and a detecting unit, wherein the detecting unit is configured to detect the first touch electrode and The capacitance value between the second touch sub-electrodes of the second touch electrode changes and the touch position is determined according to the position of the corresponding second touch sub-electrode that changes the capacitance value.
  • FIG. 1 is a schematic diagram of a touch display panel 100 according to an embodiment of the present application.
  • the touch display panel 100 includes a first substrate, a second substrate, a first touch electrode 102 disposed on the first substrate, a second touch electrode 101 disposed on the second substrate, and a detecting unit. 10 and control unit 20.
  • the first touch electrode 102 is an integral first touch electrode, which can be grounded or connected to a constant voltage
  • the second touch electrode 101 is composed of a plurality of second touch sub-electrodes 103 arranged in a matrix, wherein Each of the second touch sub-electrodes 103 may be a rectangular block unit.
  • the detecting unit 10 is connected to each of the second touch sub-electrodes 103 of the second touch electrodes 101 for detecting the capacitance between the first touch electrodes 102 and the second touch sub-electrodes 103 of the second touch electrodes 101. The value is changed, and the specific detection method will be described in detail below; and the detecting unit 10 determines the touch position according to the position of the corresponding second touch sub-electrode that generates the capacitance value change.
  • the detecting unit 10 is further configured to detect a magnitude of a change in capacitance between the first touch electrode 102 and each of the second touch sub-electrodes 103 of the second touch electrode 101, and the control unit 20 is configured to be configured according to the The magnitude of the change in capacitance between the touch electrode 102 and the corresponding second touch sub-electrode 103 determines the magnitude of the pressure applied to the touch display panel to control the touch display panel to perform different operations.
  • FIG. 8(A) shows a schematic diagram of a circuit for capacitance detection of the second touch sub-electrode 103
  • FIGS. 8(B)-(D) respectively show the original input voltage waveform and the second touch at the occurrence of the touch.
  • the circuit for capacitance detection of the second touch sub-electrode 103 can be equivalent to a circuit including impedance and capacitive reactance, then, when the square wave input voltage is as shown in FIG. 8(B).
  • the voltage waveform detected on the second touch sub-electrode 103 is no longer a regular square wave due to the capacitive reactance in the circuit, which may include a charging process and a discharging process. , as shown in Figures 8(C) and 8(D).
  • the capacitance between the two electrodes 103 is increased, and the increase of the capacitance value affects the charging process and the discharging process. It generally makes the charging time and discharge time longer. Comparing Figs. 8(C) and 8(D), the discharge time t2 in Fig. 8(C) is significantly larger than the discharge time t1 in Fig. 8(D).
  • the detecting unit 10 can detect the change in the capacitance value by detecting the discharge time of the voltage waveform on the second touch sub-electrode 103.
  • the detecting unit 10 detects a change in the discharge time, thereby detecting a change in the capacitance value, and the detecting unit 10 determines the position of the second touch sub-electrode 103 based on the corresponding generated capacitance value in the second touch electrode 10, You can determine where the touch occurs.
  • the detecting unit 10 can also detect the magnitude of the change value of the discharge time, that is, the specific value of t2-t1, and the detecting unit 10 can also detect the magnitude of the change of the capacitance value according to the magnitude of the change value of the discharge time, and the control unit 20 Based on the magnitude of the change in the capacitance between the first touch electrode 102 and the second touch sub-electrode 103, the magnitude of the touch pressure can be determined. For example, it can be determined whether the current touch action is a light press or a heavy press. Moreover, the control unit 20 can also control the touch display panel 100 to perform different operations based on the determined magnitude of the touch pressure, which will be described in further detail below.
  • FIGS. 2(A)-(B) are schematic diagrams of a pixel unit structure 200 of a touch display panel according to the present application.
  • the touch display panel includes an upper substrate (first substrate) 206, a lower substrate (second substrate) 201, and a liquid crystal layer 208 disposed between the two substrates.
  • the upper substrate 206 may be a color film substrate
  • the lower substrate 201 may be an array substrate.
  • the array substrate 201 is provided with an insulating layer 202, a data line 203, a pixel electrode 207 and a common electrode 204, wherein the data
  • the line 203 and the pixel electrode 207 are disposed in the insulating layer 202, and the common electrode 204 is disposed above the insulating layer 202.
  • the touch display panel can be constructed by an IPS (in-plane switch) or an ADS (Advanced Super Dimension Switch) type liquid crystal display panel.
  • IPS in-plane switch
  • ADS Advanced Super Dimension Switch
  • the voltage between the common electrode 204 and the pixel electrode 207 can control the rotation of the liquid crystal molecules of the liquid crystal layer, thereby controlling the liquid crystal display.
  • the common electrode 204 also serves as the second touch sub-electrode, correspondingly, As shown in FIG. 2(A), a first touch electrode 205 (corresponding to the first touch electrode 102 in FIG. 1) is disposed on a side of the color filter substrate 206 facing the liquid crystal layer.
  • FIG. 5(A)-(B) are schematic diagrams showing the touch control of the touch display panel according to the embodiment of the present application.
  • the film substrate 503 is deformed to cause the first touch electrode 502 (which corresponds to the first touch electrode 102 in FIG. 1 ) and the second touch sub-electrode 501 (also a common electrode, which corresponds to the second touch in FIG. 1 ).
  • the distance between the control electrode 103) becomes smaller, so that the capacitance value between the first touch electrode 502 and the second touch sub-electrode 501 changes, and the corresponding second touch sub-electrode changes according to the generated capacitance value.
  • the position of 501 can determine the position of the touch; and, according to the magnitude of the change in the capacitance value, the magnitude of the touch pressure can be determined, which will be further explained below.
  • the common electrode 204 may be a comb electrode.
  • 3 is a schematic diagram of wiring of a second touch sub-electrode of a touch display panel according to an embodiment of the present application
  • FIG. 4 is a diagram showing a manner of setting a second touch sub-electrode according to an embodiment of the present application. schematic diagram. 2(C), FIG. 3 and FIG.
  • At least one common electrode 204 may be disposed in each of the second touch sub-electrodes 103, and each of the common electrodes 204 may also be referred to as a sub-common electrode, and each The sub-common electrodes 204 in the second touch sub-electrode 103 are connected together, and the sub-common electrodes 204 in the adjacent second touch sub-electrodes 103 are independent of each other and pass through the lead wires 310 and the external chips, for example, respectively. connection.
  • the common electrode 204 also functions as an electrode of the liquid crystal display and a second touch sub-electrode for touch.
  • the driving circuit of the touch display panel 100 can alternately control the display signal and the touch signal in a time division multiplexing manner.
  • FIG. 6 is a schematic diagram showing time-division touch of a touch display panel according to an embodiment of the present application.
  • the first time period T1 is used for liquid crystal display and the remaining time period T2 is used for touch control within one frame time.
  • the pixel unit structure of the display panel is not completely shown for clarity of illustration.
  • the array substrate 201 may further be provided with a gate, a scan line, a gate insulating layer, a semiconductor layer, and a source/ The drain film and the lower alignment film, etc.
  • the color film substrate 206 may further be provided with: color film light Resistance, black matrix and upper alignment film.
  • the array substrate 201 may be a glass substrate.
  • the above embodiment uses the second touch electrode disposed on the array substrate, and the second touch electrode is composed of the plurality of second touch sub-electrodes 103, and can accurately determine the touch position and size based on the change of the capacitance value.
  • the common electrode on the array substrate can double as the second touch sub-electrode, and the thickness of the panel can be further reduced without providing a separate second touch sub-electrode.
  • FIGS. 5(A) and 5(B) respectively show the touch diagrams under different touch pressure operations.
  • FIG. 5(A) when the pressure of the touch color film substrate 503 is large, the deformation of the color filter substrate 503 is also large, and the capacitance between the first touch electrode 502 and the second touch sub-electrode 503. The value of the change is larger.
  • FIG. 5(A) when the pressure of the touch color film substrate 503 is large, the deformation of the color filter substrate 503 is also large, and the capacitance between the first touch electrode 502 and the second touch sub-electrode 503. The value of the change is larger.
  • FIG. 5(A) when the pressure of the touch color film substrate 503 is large, the deformation of the color filter substrate 503 is also large, and the capacitance between the first touch electrode 502 and the second touch sub-electrode 503. The value of the change is larger.
  • FIG. 5(A) when the pressure of the touch color film substrate 503 is large, the deformation of
  • an exemplary control unit may be further configured to: change a capacitance value between the first touch electrode and a corresponding second touch sub-electrode When the value is less than the preset value a, the touch display panel performs a first operation; and/or when the capacitance value between the first touch electrode and the corresponding second touch sub-electrode changes is greater than a preset value a And when the value is less than the preset value b, the touch display panel is caused to perform a second operation different from the first operation; and/or between the first touch electrode and the corresponding second touch sub-electrode When the capacitance value changes by more than the preset value b, the touch display panel performs a third operation different from the first operation and the second operation.
  • the driving method thereof may include the following steps:
  • the detecting unit detects a change in the capacitance value between each of the second touch sub-electrodes of the first touch electrode and the second touch electrode;
  • the touch position can be determined according to the position of the corresponding second touch sub-electrode that generates a change in the capacitance value.
  • the detecting unit detects the time of discharge of the capacitor, and the position corresponding to the second touch sub-electrode whose discharge time changes is the position where the touch occurs.
  • the detecting unit can simultaneously detect the change in the capacitance value between the first touch electrode and the plurality of second touch sub-electrodes; and determine the position of the plurality of corresponding second touch sub-electrodes according to the change in the generated capacitance value. Touch location.
  • the detecting unit may further detect a magnitude of a change in a capacitance value between each of the second touch sub-electrodes of the first touch electrode and the second touch electrode;
  • the touch display panel When the capacitance value changes less than the first preset value a, the touch display panel performs a first operation
  • the touch display panel When the capacitance value changes by more than the first preset value a is smaller than the second preset value b, the touch display panel performs a second operation different from the first operation.
  • the touch display panel when the capacitance value changes by the second preset value b, the touch display panel performs a third operation different from the first operation and the second operation.
  • the first operation, the second operation, and the third operation are respectively an operation selected from a click operation, an operation of popping a menu, and an operation of uninstalling an application, for example, the first The operation is a click operation, the second operation is an operation of a popup menu, and the third operation is an operation of uninstalling an application.
  • the common electrode acts on the electrode of the liquid crystal display and the second touch sub-electrode for touch control, so that in order to coordinate the liquid crystal display and the touch function, the display signal and the touch can be alternately controlled by means of time division multiplexing. Control signal.
  • the detection unit and the control are separately described for the purpose of explaining the present application.
  • the detection unit and the control unit can also be integrated into one unit, for example both integrated into a microprocessor, an IC of a display panel or other chip.
  • the touch display panel and the driving method thereof according to the above embodiments use a plurality of second touch sub-electrodes arranged in an array arranged on the array substrate, and can accurately determine the touch position based on the change of the capacitance value, thereby realizing multi-touch control.
  • the common electrode on the array substrate can double as the second touch sub-electrode, and the thickness of the panel can be further reduced without providing a separate second touch sub-electrode, so that the display panel can be light and thin.
  • the touch display panel according to the above embodiment can determine the magnitude of the touch pressure according to the magnitude of the change in the capacitance between the first touch electrode and the second touch sub-electrode, and can realize the touch pressure based on different sizes. Different operations. Therefore, the touch display panel of the present application can realize multi-touch while the package panel is light and thin, and can accurately detect the touch pressure.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Geometry (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种触控显示面板（100）及一种触控显示面板的驱动方法。该方法包括：第一基板；第二基板；设置在第一基板上的第一触控电极（102），所述第一触控电极（102）为一块整体电极；设置在第二基板上的第二触控电极（101），所述第二触控电极（101）包括多个第二触控子电极（103）；检测单元（10），所述检测单元（10）用于检测第一触控电极（102）与第二触控电极（101）的各个第二触控子电极（103）之间的电容值变化并且根据产生电容值变化的对应的第二触控子电极（103）的位置确定触控位置。

Description

触控显示面板及其驱动方法
相关申请的交叉引用
本申请要求2016年4月20号提交中国专利局的申请号为201610248686.5的中国专利申请的优先权，其全部内容通过引用合并于本申请中。
技术领域
本申请属于液晶显示领域，尤其涉及一种触控显示面板及其驱动方法。
背景技术
随着显示技术的飞速发展，触控显示面板越来越多地应用到各种电子产品中，例如智能手机、笔记本电脑、平板电脑等。
触控显示面板根据感应技术不同可以分为电阻式、电容式、光学式、音波式四种，目前主流的触控技术为电容式。然而，现有的电容式触控显示面板较厚，不能较好地将普通触控和压力触控结合起来使用。
例如，对于已知的自电容式触控显示面板，虽然其结构相对简单，但是它无法准确检测触控压力的大小。
发明内容
本申请旨在解决现有技术中的至少一个问题。
根据本申请的一个方面，提供一种触控显示面板，包括：第一触控电极，所述第一触控电极为一块整体电极；第二触控电极，所述第二触控电极与第一触控电极相对并包括多个第二触控子电极；以及检测单元，所述检测单元用于检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化并且根据产生电容值变化的对应 的第二触控子电极的位置确定触控位置。
根据本申请的一个实施例，所述触控显示面板还包括控制单元，并且所述检测单元还被配置为检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化的大小，所述控制单元被配置为根据第一触控电极与对应的第二触控子电极之间的电容值变化的大小确定施加给触控显示面板的压力的大小以控制触控显示面板执行不同的操作。
根据本申请的一个实施例，所述控制单元进一步被配置为：当第一触控电极与对应的第二触控子电极之间的电容值变化小于第一预设值时，使得所述触控显示面板执行第一操作；和/或当第一触控电极与对应的第二触控子电极之间的电容值变化大于第一预设值并且小于第二预设值时，使得所述触控显示面板执行不同于所述第一操作的第二操作；和/或当第一触控电极与对应的第二触控子电极之间的电容值变化大于所述第二预设值时，使得所述触控显示面板执行不同于所述第一操作和所述第二操作的第三操作。
根据本申请的一个实施例，第二触控子电极同时用作所述触控显示面板的公共电极。
根据本申请的一个实施例，每一个第二触控子电极包括至少一个子公共电极，每一个第二触控子电极内的所述子公共电极连接在一起，相邻的第二触控子电极内的子公共电极相互独立并分别通过引线与外部芯片连接。
根据本申请的一个实施例，所述触控显示面板还包括相对设置的第一基板和第二基板；第一触控电极设置在第一基板上，第二触控电极设置在第二基板上。
根据本申请的一个实施例，第一基板为彩膜基板和阵列基板之一，第二基板为彩膜基板和阵列基板中的另一个，第一基板和第二基板之间为液晶层。
根据本申请的另一方面，提供一种触控显示面板的驱动方法，其中，所述触控显示面板包括：第一触控电极和包括多个第二触控子电 极的第二触控电极；所述驱动方法包括：输入波形信号至第二触控电极，以对第一触控电极和第二触控电极之间的电容进行充电和放电；检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化；以及根据产生电容值变化的对应的第二触控子电极的位置确定触控位置。
根据本申请的一个实施例，所述驱动方法还包括：同时检测第一触控电极与多个第二触控子电极之间的电容值变化；根据产生电容值变化的多个对应的第二触控子电极的位置确定多个触控位置。
根据本申请的一个实施例，所述驱动方法还包括：检测单元检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化的大小；当所述电容值变化小于第一预设值时，控制触控显示面板执行第一操作；当所述电容值变化大于所述第一预设值小于第二预设值时，控制触控显示面板执行不同于所述第一操作的第二操作。
进一步地，所述驱动方法还包括：当所述电容值变化大于所述第二预设值时，控制触控显示面板执行不同于所述第一操作和所述第二操作的第三操作。
根据一个实施例，所述第一操作、所述第二操作和所述第三操作分别为从单击操作、弹出菜单的操作和卸载应用程序的操作中选择的一个操作。
根据本申请的一个实施例，根据各个第二触控子电极的放电时间的变化检测第一触控电极与各个第二触控子电极之间的电容值变化。
根据本申请的一个实施例，采用分时复用的方式交替控制显示信号与触控信号。
通过下文中参照附图对本申请所作的描述，本申请的目的和优点将显而易见，并可帮助对本申请有全面的理解。
附图说明
图1是根据本申请的一个实施例的触控显示面板的示意图；
图2(A)-2(B)是根据本申请的一个实施例的触控显示面板的像素单元结构的示意图；
图3是示出根据本申请的一个实施例的触控显示面板的第二触控子电极的接线的示意图；
图4是示出根据本申请的一个实施例的兼用作公共电极的第二触控子电极的设置方式的示意图；
图5(A)-(B)是根据本申请的一个实施例的触控显示面板的触控示意图；
图6是示出根据本申请的一个实施例的触控显示面板的分时触控的示意图；
图7是示出根据本申请的一个实施例的触控显示面板的驱动方法的流程图；以及
图8(A)-(D)是电容检测的原理图。
具体实施方式
下面通过实施例，并结合附图，对本申请的技术方案作进一步具体的说明。在说明书中，相同或相似的附图标号指示相同或相似的部件。下述参照附图对本发明实施方式的说明旨在对本申请的总体发明构思进行解释，而不应当理解为对本申请的一种限制。
另外，在下面的详细描述中，为便于解释，阐述了许多具体的细节以提供对本披露实施例的全面理解。然而明显地，一个或多个实施例在没有这些具体细节的情况下也可以被实施。在其他情况下，公知的结构和装置以图示的方式体现以简化附图。
根据本发明的总体技术构思的一个方面，提供一种触控显示面板，包括：第一基板和第二基板；设置在第一基板上的第一触控电极，所述第一触控电极为一块整体电极；设置在第二基板上的第二触控电极，所述第二触控电极包括多个第二触控子电极；检测单元，所述检测单元用于检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化并且根据产生电容值变化的对应的第二触控子电极的位置确定触控位置。
图1是根据本申请的实施例的触控显示面板100的示意图。如图1所示，触控显示面板100包括第一基板、第二基板、设置在第一基板上的第一触控电极102、设置在第二基板上的第二触控电极101、检测单元10和控制单元20。其中，第一触控电极102是一块整体的第一触控电极，其可以接地或连接至恒定电压，第二触控电极101由呈矩阵排列的多个第二触控子电极103组成，其中，每一个第二触控子电极103可以为矩形的块状单元。检测单元10连接至第二触控电极101的各个第二触控子电极103，用于检测第一触控电极102与第二触控电极101的各个第二触控子电极103之间的电容值变化，具体的检测方法将在下文中详细描述；并且检测单元10根据产生电容值变化的对应的第二触控子电极的位置确定触控位置。进一步地，检测单元10还被配置为检测第一触控电极102与第二触控电极101的各个第二触控子电极103之间的电容值变化的大小，控制单元20被配置为根据第一触控电极102与对应的第二触控子电极103之间的电容值变化的大小确定施加给触控显示面板的压力的大小以控制触控显示面板执行不同的操作。
具体地，当触控触控显示面板100时，第一触控电极102与对应的第二触控子电极103之间的距离会变小，导致两个电极之间的电容值变化。作为一个示例，检测单元10可以根据第二触控子电极103反馈的放电时间的变化检测第一触控电极102与各个第二触控子电极103之间的电容值变化。图8(A)示出了用于第二触控子电极103电容检测的电路的原理图，图8(B)-(D)分别示出了原始输入电压波形、触摸发生处的第二触控子电极103上的电压波形和触摸未发生处的第二触控子电极103上的电压波形。如图8(A)所示，用于第二触控子电极103电容检测的电路可以等效为包括阻抗和容抗的电路，那么，当如图8(B)所示的方波输入电压施加于第二触控子电极103上时，由于电路中存在容抗，所以在第二触控子电极103上检测到的电压波形不再是规则的方波，其会包括充电过程和放电过程，如图8(C)和8(D)所示。而且，对于触摸发生处的第二触控 子电极103，由于其与第一触控电极102之间的距离因触摸而减小，相应地二者之间的电容值会增大，该电容值的增大就会影响充电过程和放电过程，一般会使得充电时间和放电时间变长。比较图8(C)和8(D)，图8(C)中的放电时间t2明显大于图8(D)中的放电时间t1。这样，检测单元10通过检测第二触控子电极103上的电压波形的放电时间，就可以检测出电容值变化。一方面，检测单元10检测到放电时间发生变化，从而检测出电容值发生变化，检测单元10基于第二触控电极10中对应的产生电容值变化的第二触控子电极103的位置，就可以确定触控发生的位置。
另一方面，检测单元10还可以检测放电时间变化值的大小，即t2-t1的具体数值，检测单元10还可以根据放电时间的变化值的大小检测出电容值变化的大小，而控制单元20基于第一触控电极102与第二触控子电极103之间的电容值变化的大小，就可以确定触控压力的大小，例如，可以确定当前的触控动作是轻按还是重压。而且，控制单元20还可以基于确定出的触控压力的大小控制触控显示面板100执行不同的操作，下文将对此进一步详细描述。
参照图2，图2(A)-(B)是根据本申请的触控显示面板的像素单元结构200的示意图。在图示的实施例中，触控显示面板包括上基板(第一基板)206、下基板(第二基板)201以及设置在两个基板之间的液晶层208。其中，上基板206可以是彩膜基板，下基板201可以是阵列基板。
在图示的实施例中，如图2(A)所示，在一个像素单元结构200内，阵列基板201上设置有绝缘层202、数据线203、像素电极207和公共电极204，其中，数据线203和像素电极207设置在绝缘层202中，公共电极204设置在绝缘层202上方。
在该实施例中，触控显示面板可以由IPS(in-plane switch)或ADS(Advanced Super Dimension Switch)型液晶显示面板构造。对于该类型的液晶显示面板，公共电极204与像素电极207之间的电压可以控制液晶层的液晶分子的旋转，从而控制液晶显示。
在该实施例中，公共电极204同时兼作第二触控子电极，对应地， 如图2(A)所示，在彩膜基板206面向液晶层的一侧设置有第一触控电极205(对应图1中的第一触控电极102)。
图5(A)-(B)示意性地示出了根据本申请的实施例的触控显示面板的触控示意图，如图所示，当用户触控彩膜基板503时，按压力导致彩膜基板503发生形变，引起第一触控电极502(其对应图1中的第一触控电极102)与第二触控子电极501(也是公共电极，其对应于图1中的第二触控子电极103)之间的距离变小，从而引起第一触控电极502与第二触控子电极501之间的电容值发生变化，根据产生电容值变化的对应的第二触控子电极501的位置，可以确定触控的位置；并且，根据电容值变化的大小，可以确定触控压力的大小，这一点在下文中将进一步说明。
返回参见图2，如图2(B)所示，公共电极204可以是梳状电极。图3是根据本申请的一个实施例的触控显示面板的第二触控子电极的接线的示意图，图4是示出根据本申请的一个实施例的第二触控子电极的设置方式的示意图。结合图2(C)、图3和图4，每一个第二触控子电极103内可以设置至少一个公共电极204，此时每一个公共电极204也可以被称为子公共电极，并且每一个第二触控子电极103内的所述子公共电极204连接在一起，而相邻的第二触控子电极103内的子公共电极204相互独立并分别通过例如金属线的引线310与外部芯片连接。
在上述实施例中，公共电极204兼作用于液晶显示的电极和用于触控的第二触控子电极。为了协调液晶显示和触控功能，触控显示面板100的驱动电路可以采用分时复用的方式交替控制显示信号与触控信号。图6是示出根据本申请的一个实施例的触控显示面板的分时触控的示意图。在图6的实施例中，在一帧的时间内，第一时间段T1用于液晶显示，其余的时间段T2用于触控。
在上述实施例中，为了图示清楚，未完全示出显示面板的像素单元结构。尽管未图示，但在图2(A)-2(B)所示的像素单元结构内，阵列基板201上还可以设置有：栅极、扫描线、栅极绝缘层、半导体层、源/漏极和下配向膜等，彩膜基板206上还可以设置有：彩膜光 阻、黑色矩阵及上配向膜等。阵列基板201可以是玻璃基板。
因此，上述实施例使用设置在阵列基板上的第二触控电极，并且该第二触控电极由多个第二触控子电极103组成，能够基于电容值变化准确地确定触控位置和大小，从而实现多点触控。并且阵列基板上的公共电极可以兼作第二触控子电极，无需设置单独的第二触控子电极，可以进一步减小面板的厚度。
下面，进一步说明如何根据电容值变化的大小来确定触控压力的大小。返回参见图5，图5(A)和5(B)分别示出了不同触控压力操作下的触控示意图。如图5(A)所示，当触控彩膜基板503的压力较大时，彩膜基板503的形变也较大，第一触控电极502和第二触控子电极503之间的电容值变化就较大；反之，如图5(B)所示，当触控彩膜基板503的压力较小时，基板503的形变也较小，第一触控电极502和第二触控子电极503之间的电容值变化就较小。即，第一触控电极502和第二触控子电极503之间的电容值变化的大小直接与触控基板503的压力相关。而且，由于在彩膜基板503上设置有电极502，所以触控是根据电极501和电极502之间的电容值进行检测的，此时触控不再受手指接触面积的影响，仅与电极501和电极502之间的距离相关，因此，能够根据电容值变化的大小准确地检测触控压力的大小。
进一步地，如图7所示，根据本申请的实施例的一个示例性控制单元可以进一步被配置为：当所述第一触控电极与对应的第二触控子电极之间的电容值变化小于预设值a时，使得所述触控显示面板执行第一操作；和/或当所述第一触控电极与对应的第二触控子电极之间的电容值变化大于预设值a并且小于预设值b时，使得所述触控显示面板执行不同于所述第一操作的第二操作；和/或当所述第一触控电极与对应的第二触控子电极之间的电容值变化大于所述预设值b时，使得所述触控显示面板执行不同于所述第一操作和所述第二操作的第三操作。
基于上述实施例的触控显示面板，如图7所示，其驱动方法可以包括如下步骤：
输入波形信号至第二触控电极，以对第一触控电极和第二触控电极之间的电容进行充电和放电，如图8所示；
检测单元检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化；
根据产生电容值变化的对应的第二触控子电极的位置可以确定触控位置。
具体地如上所述，触摸时，被触摸的第一触控电极和相应的第二触控子电极之间的距离发生变化，导致二者之间的电容变化，这样电容放电的时间随之改变，检测单元对电容放电的时间进行检测，放电时间有变化的第二触控子电极对应的位置即为触控发生的位置。
具体地，检测单元可以同时检测第一触控电极与多个第二触控子电极之间的电容值变化；并且根据产生电容值变化的多个对应的第二触控子电极的位置确定多个触控位置。
进一步地，检测单元还可以检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化的大小；
当所述电容值变化小于第一预设值a时，所述触控显示面板执行第一操作；
当所述电容值变化大于所述第一预设值a小于第二预设值b时，所述触控显示面板执行不同于所述第一操作的第二操作。
可选地，当所述电容值变化大于所述第二预设值b时，所述触控显示面板执行不同于所述第一操作和所述第二操作的第三操作。
作为一个示例，所述第一操作、所述第二操作和所述第三操作分别为从单击操作、弹出菜单的操作和卸载应用程序的操作中选择的一个操作，例如，所述第一操作为单击操作，所述第二操作为弹出菜单的操作，所述第三操作为卸载应用程序的操作。
进一步地，公共电极兼作用于液晶显示的电极和用于触控的第二触控子电极，这样，为了协调液晶显示和触控功能，可以采用分时复用的方式交替控制显示信号与触控信号。
在上述实施例中，为了解释本申请，分开描述了检测单元和控制 单元，在其它实施例中，检测单元和控制单元也可以集成到一个单元中，例如二者都集成到微处理器、显示面板的IC或其它芯片中。
根据上述实施例的触控显示面板及其驱动方法使用设置在阵列基板上的布置成阵列的多个第二触控子电极，能够基于电容值变化准确地确定触控位置，从而实现多点触控。并且阵列基板上的公共电极可以兼作该第二触控子电极，无需设置单独的第二触控子电极，可以进一步减小面板的厚度，从而能够实现显示面板的轻薄化。进一步地，根据上述实施例的触控显示面板能够根据第一触控电极和第二触控子电极之间电容值变化的大小确定触控压力的大小，并且能够基于不同大小的触控压力实现不同的操作。因此，本申请的触控显示面板在包装面板轻薄化的同时能够实现多点触控，并且能够准确检测触控压力大小。
虽然结合附图对本申请进行了说明，但是附图中公开的实施例旨在对本申请的实施方式进行示例性说明，而不能理解为对本申请的一种限制。
虽然本申请总体构思的一些实施例已被显示和说明，本领域普通技术人员将理解，在不背离本申请总体构思的原则和精神的情况下，可对这些实施例做出改变，本申请的范围以权利要求和它们的等同物限定。

Claims (14)

  1. 一种触控显示面板，包括：
    第一触控电极，所述第一触控电极为一块整体电极；
    第二触控电极，所述第二触控电极与第一触控电极相对并包括多个第二触控子电极；和
    检测单元，所述检测单元用于检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化并且根据产生电容值变化的对应的第二触控子电极的位置确定触控位置。
  2. 根据权利要求1所述的触控显示面板，其特征在于，所述触控显示面板还包括控制单元，并且所述检测单元还被配置为检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化的大小，所述控制单元被配置为根据第一触控电极与对应的第二触控子电极之间的电容值变化的大小确定施加给触控显示面板的压力的大小以控制触控显示面板执行不同的操作。
  3. 根据权利要求2所述的触控显示面板，其特征在于，所述控制单元进一步被配置为：当第一触控电极与对应的第二触控子电极之间的电容值变化小于第一预设值时，使得所述触控显示面板执行第一操作；和/或当第一触控电极与对应的第二触控子电极之间的电容值变化大于第一预设值并且小于第二预设值时，使得所述触控显示面板执行不同于所述第一操作的第二操作；和/或当第一触控电极与对应的第二触控子电极之间的电容值变化大于所述第二预设值时，使得所述触控显示面板执行不同于所述第一操作和所述第二操作的第三操作。
  4. 根据权利要求1-3中任一项所述的触控显示面板，其特征在于，第二触控子电极同时用作所述触控显示面板的公共电极。
  5. 根据权利要求4所述的触控显示面板，其特征在于，每一个第二触控子电极包括至少一个子公共电极，每一个第二触控子电极内的所述子公共电极连接在一起，相邻的第二触控子电极内的子公共电极相互独立并分别通过引线与外部芯片连接。
  6. 根据权利要求1所述的触控显示面板，其特征在于，
    所述触控显示面板还包括相对设置的第一基板和第二基板；
    第一触控电极设置在第一基板上，第二触控电极设置在第二基板上。
  7. 根据权利要求6所述的触控显示面板，其特征在于，第一基板为彩膜基板和阵列基板之一，第二基板为彩膜基板和阵列基板中的另一个，第一基板和第二基板之间为液晶层。
  8. 一种触控显示面板的驱动方法，其中，所述触控显示面板包括：第一触控电极和包括多个第二触控子电极的第二触控电极；所述驱动方法包括：
    输入波形信号至第二触控电极，以对第一触控电极和第二触控电极之间的电容进行充电和放电；
    检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化；以及
    根据产生电容值变化的对应的第二触控子电极的位置确定触控位置。
  9. 根据权利要求8所述的触控显示面板的驱动方法，还包括：
    同时检测第一触控电极与多个第二触控子电极之间的电容值变化；以及
    根据产生电容值变化的多个对应的第二触控子电极的位置确定 多个触控位置。
  10. 根据权利要求8或9所述的触控显示面板的驱动方法，所述驱动方法还包括：
    检测单元检测第一触控电极与第二触控电极的各个第二触控子电极之间的电容值变化的大小；
    当所述电容值变化小于第一预设值时，控制触控显示面板执行第一操作；以及
    当所述电容值变化大于所述第一预设值小于第二预设值时，控制触控显示面板执行不同于所述第一操作的第二操作。
  11. 根据权利要求10所述的触控显示面板的驱动方法，还包括：
    当所述电容值变化大于所述第二预设值时，所述控制装置控制触控显示面板执行不同于所述第一操作和所述第二操作的第三操作。
  12. 根据权利要求11所述的触控显示面板的驱动方法，其中，所述第一操作、所述第二操作和所述第三操作分别为从单击操作、弹出菜单的操作和卸载应用程序的操作中选择的一个操作。
  13. 根据权利要求8所述的触控显示面板的驱动方法，其中，根据各个第二触控子电极的放电时间的变化检测第一触控电极与各个第二触控子电极之间的电容值变化。
  14. 根据权利要求8所述的触控显示面板的驱动方法，其中，采用分时复用的方式交替控制显示信号与触控信号。
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