WO2018040233A1 - 具有触控感测器的液晶显示装置及其驱动方法 - Google Patents

具有触控感测器的液晶显示装置及其驱动方法 Download PDF

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Publication number
WO2018040233A1
WO2018040233A1 PCT/CN2016/101892 CN2016101892W WO2018040233A1 WO 2018040233 A1 WO2018040233 A1 WO 2018040233A1 CN 2016101892 W CN2016101892 W CN 2016101892W WO 2018040233 A1 WO2018040233 A1 WO 2018040233A1
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touch
pixel
liquid crystal
crystal display
display device
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PCT/CN2016/101892
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English (en)
French (fr)
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郝思坤
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深圳市华星光电技术有限公司
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Priority to US15/323,815 priority Critical patent/US20180181239A1/en
Publication of WO2018040233A1 publication Critical patent/WO2018040233A1/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
    • G02F1/136—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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • 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
    • 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
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • 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
    • 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
    • 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
    • G02F2201/124—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode interdigital
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display device having a touch function.
  • Liquid crystal display is one of the most widely used flat panel displays, and has gradually become widely used in various electronic devices such as mobile phones, personal digital assistants (PDAs), digital cameras, computer screens or notebook screens.
  • a display with a high resolution color screen With the development of liquid crystal display technology, people have put forward higher requirements on the display quality, design and human-machine interface of liquid crystal display.
  • the touch technology has become a hot spot in technology development because of its convenient operation and high integration.
  • the existing thin film transistor liquid crystal display mainly comprises two glass substrates and a liquid crystal layer, wherein the upper glass substrate is provided with a color filter on the surface, and the lower glass substrate is provided with a thin film transistor and a pixel electrode. Each pixel is composed of three liquid crystal cells, each of which is preceded by a red, green or blue filter, so that the light through different cells can display different colors on the screen.
  • Touch technology is no stranger to people. Most of the bank's cash machines have touch screen functions. Many hospitals, libraries and other halls have such touch technology computers, and mobile phones, MP3s and digital cameras that support touch screens are also many. These existing touch screens can be divided into single touch, which recognizes and supports touch and click for one finger at a time; another type of multi-touch technology (Multi-Touch) can break down tasks into two In terms of work, one is to collect multiple signals at the same time, and the other is to judge the meaning of each signal, which is called gesture recognition, so as to realize the click and touch actions of the five fingers of the screen recognition person.
  • Multi-Touch another type of multi-touch technology
  • In-Cell touch solutions include self-capacitance touch and mutual capacitance touch.
  • the self-capacitance touch method the transparent conductive layer used as a common (VCOM) electrode on the array substrate is divided into a plurality of squares as a touch sensor unit, and one end of the specific metal trace is connected through the via hole and the touch sensor unit, and the other end is connected.
  • the driving integrated circuit Connecting to the driving integrated circuit, when the finger touches the touch display panel, the capacitance value of the touch sensor unit at the corresponding position is fluctuated, and the driving integrated circuit can determine the position of the touch point by detecting the fluctuation of the capacitance value, thereby realizing the touch. Control function.
  • Mutual capacitance touch mode design a lateral drive electrode (Tx) line on the array substrate, design a longitudinal sensing electrode (Rx) line on the color film substrate, the Tx line sequentially emits an excitation signal, and all Rx lines simultaneously receive signals to obtain the entire touch
  • the size of the capacitance of the two-dimensional plane of the display panel is controlled, thereby calculating the position of the touch point according to the amount of change of the capacitance value, thereby implementing the touch function.
  • the present application proposes a liquid crystal display device with a touch sensor and a driving method thereof.
  • the liquid crystal display device with the touch sensor of the present invention uses the data line covering the pixel as the touch lead.
  • the liquid crystal display device with a touch sensor as described above, wherein the liquid crystal display device comprises an array substrate and a color filter substrate disposed opposite to each other, the array substrate comprises a plurality of pixel units arranged in an array, each pixel unit comprising a red sub-pixel, The green sub-pixel and the blue sub-pixel, the common electrode covering the data line between the blue sub-pixel and the red sub-pixel of two adjacent pixel units is set as a touch lead.
  • the liquid crystal display device with the touch sensor as described above, wherein the multiplexing is adjacent to the touch lead The common electrodes of the two rows of pixels are connected to each other.
  • the liquid crystal display device with a touch sensor as described above wherein the array substrate comprises a plurality of data lines arranged in parallel, the touch leads are insulated from the data lines in the same layer, and each touch electrode corresponds to at least one Touch leads.
  • a driving method of a liquid crystal display device with a touch sensor comprising:
  • the touch driving signal is loaded to the touch electrode through the touch lead, the touch electrode outputs the sensing signal, the touch electrode is connected to the touch signal detecting module, and the touch signal detecting module is based on the sensing of the touch electrode output.
  • the signal determines the touch position
  • the common electrode signal is applied to the touch electrode through the touch lead to realize liquid crystal display.
  • a liquid crystal display device with a touch sensor and a driving method thereof provided by the present invention wherein a touch lead is added in a blue sub-pixel, and the lead is used as a touch line during touch scanning.
  • the touch lead outputs a touch driving signal to the touch electrode, the touch electrode outputs a sensing signal, and the touch electrode is connected to the touch signal detecting module, and the touch signal detecting module determines the touch position according to the sensing signal output by the touch electrode.
  • the rest of the time is used as a common electrode, and the common electrode signal is applied to the touch electrode through the touch lead, which is the display phase.
  • the touch lead is placed in the blue sub-pixel, so that the pixel has a touch function, and the display penetration rate is not greatly reduced.
  • 1 is a sub-pixel structure in the prior art, wherein 1-1 represents a data line, 1-2 represents an electrode gate line, 1-3 represents a common electrode line, 1-4 represents a thin film transistor, and 1-5 represents a pixel electrode;
  • R represents a red color resistance
  • G represents a green color resistance
  • B represents a blue color resistance
  • FIG. 3 is a GE layer structure diagram of a pixel based on the pixel structure of FIG. 2;
  • FIG. 4 is an AS layer structure diagram of a pixel based on the pixel structure of FIG. 2;
  • FIG. 5 is a SE layer structure diagram of a pixel based on the pixel structure of FIG. 2;
  • FIG. 6 is a VIA layer structure diagram of a pixel based on the pixel structure of FIG. 2;
  • FIG. 7 is a PE layer structure diagram of a pixel based on the pixel structure of FIG. 2;
  • 1-1 represents a data line
  • 1-2 represents an electrode gate line
  • 1-3 represents a common electrode line
  • 1-4 represents a thin film transistor
  • 1-5 represents a pixel electrode
  • FIG. 9 is a pixel GE layer structure diagram based on the pixel structure of FIG. 8;
  • FIG. 10 is a block diagram of a pixel AS layer based on the pixel structure of FIG. 8;
  • FIG. 11 is a block diagram of a pixel SE layer based on the pixel structure of FIG. 8;
  • FIG. 12 is a block diagram of a pixel VIA layer structure based on the pixel structure of FIG. 8;
  • FIG. 13 is a block diagram of a pixel PE layer based on the pixel structure of FIG. 8;
  • the red color resist sub-pixel and the green color resist sub-pixel are composed of the sub-pixel shown in FIG. 1, and the blue color-resistance sub-pixel is composed of the sub-pixel shown in FIG.
  • 15 is a schematic plan view showing a structure of a self-capacitive touch display panel of the prior art
  • Figure 16 is a schematic cross-sectional view taken along line AA1 of Figure 15;
  • the embodiment of the invention provides a liquid crystal display device with a touch sensor and a driving method thereof for improving the transmittance of the touch display panel.
  • the present invention is implemented based on the following considerations:
  • the most direct means is to reduce the width of the black matrix.
  • simply reducing the black matrix causes the liquid crystal deflection disorder area to be Exposure, as shown in FIG. 16, if the width of the left side of the black matrix 221 is simply reduced, the common electrode is caused.
  • the area between the 213 and the Tx lead 212 is exposed, and the exposed liquid crystal of the area is turbulent due to the electric field edge formed by the pixel electrode 214 and the common electrode 213, thereby affecting the overall panel display effect.
  • the planar structure of the prior art self-capacitive touch display panel is as shown in FIG. 15
  • the cross-sectional view along the AA1 direction is as shown in FIG. 16
  • the self-capacitance touch display panel includes the array substrate 21 and the color filter substrate disposed opposite to each other. 22, the array substrate 21 adopts a 6-mask process, and sequentially forms a gate, a semiconductor active layer, a pixel electrode, a source, a drain, a passivation layer and a common electrode on the substrate.
  • the common electrode is divided into a plurality of blocks and multiplexed into touch electrodes, and each touch electrode is connected through a via hole penetrating the passivation layer and a touch electrode (Tx) lead, and the Tx lead is finally connected to the integrated display and the touch function. Drive on the integrated circuit.
  • the array substrate includes a plurality of arrays of pixel units 10, each of which includes three sub-pixel units corresponding to red (R) color resistance, green (G) color resistance, and blue color of the color filter substrate.
  • one pixel unit 10 includes three data (Data) lines and one Tx lead, the Data line and the Tx lead share the same layer of metal, and the Tx lead in one pixel unit and the Data line of the next pixel unit form a double Source structure.
  • the pixel unit 10 in the figure includes three Data lines of Data1, Data2, and Data3 and one Tx lead, and the Tx lead and the Data4 in the next pixel unit constitute a dual source structure.
  • the widths of the respective portions which are normally provided are given in FIG.
  • the width of the Data line 211 is 3 micrometers ( ⁇ m)
  • the width of the Tx lead 212 is 3 ⁇ m
  • the distance between the Data line 211 and the Tx lead 212 is 3 ⁇ m, in order to ensure the design of the open area of the black matrix 221.
  • a common electrode needs to be designed on the left side of the Tx lead 212, and the distance between the Tx lead 212 and the common electrode 213 on the left side of the Tx lead 212 is 2.5 ⁇ m to ensure the worst process fluctuations.
  • the width of the common electrode 213 on the left side of the Tx lead 212 is 3 ⁇ m, and the value of the right edge of the black matrix 221 from the right edge of the Data line 211 is 1.5 ⁇ m, and the black matrix 221
  • the value of the left edge of the left edge of the Tx lead 212 is 4 ⁇ m, the distance between the Tx lead 212 and the pixel electrode 214 is 7.5 ⁇ m, the distance between the Data line 211 and the pixel electrode 214 is 5 ⁇ m, and the width of the common electrode is W1.
  • the distance S1 can be set to a different value depending on the actual production.
  • the width of the black matrix 221 is 14.5 ⁇ m.
  • Reference numerals 215 and 216 in the figure each denote an insulating layer.
  • the prior art also provides a self-capacitive touch display panel, wherein the array substrate comprises a common electrode on the substrate, the common electrode is multiplexed into a plurality of touch electrodes, and each touch electrode is electrically connected to a touch electrode lead.
  • the touch electrode lead is multiplexed into a common electrode line, and the touch electrode lead is insulated from the data line in the same layer.
  • Each touch electrode corresponds to at least one touch electrode lead, and each pixel unit corresponds to a touch electrode lead, and the touch The electrode lead is disposed between two adjacent pixel units, and the touch electrode lead is disposed adjacent to the blue sub-pixel unit.
  • a specific embodiment of the present invention provides a liquid crystal display device having a touch sensor, the liquid crystal display device includes an array substrate and a color filter substrate disposed oppositely, and the array substrate includes a plurality of arrays.
  • Pixel unit each pixel unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
  • the touch function is implemented by using a touch lead, and the data is covered between the blue sub-pixel and the red sub-pixel of two adjacent pixel units.
  • the common electrode of the line is set as a touch lead.
  • a specific embodiment of the present invention provides a liquid crystal display device with a touch sensor, which is configured to set the common electrode covering the data line between the blue sub-pixel and the red sub-pixel of two adjacent pixels as a touch.
  • the lead wires are connected to the common electrodes of the two rows of pixels multiplexed into the touch leads, and the remaining common electrodes are not connected to each other, and the width of the common electrode multiplexed into the touch leads is larger than the width of the remaining common electrodes. width.
  • FIG. 1 is a sub-pixel structure in the prior art
  • FIG. 2 is a pixel structure based on the sub-pixel structure of FIG. 1
  • FIG. 3-7 is a pixel layer based on the pixel structure of FIG. Structure diagram
  • the specific embodiment of the present invention multiplexes the touch electrode lead into a common electrode line without the prior art.
  • An additional common electrode is disposed beside the touch electrode lead, so that the decrease in the transmittance of the pixel due to the introduction of the touch electrode lead can be reduced.
  • Each pixel of the present invention includes two kinds of sub-pixels, the first seed pixel being the same as the conventional pixel, as shown in FIG. 1, for the red color resisting R sub-pixel and the green color resisting G sub-pixel. Adding touch in the second seed pixel
  • the lead wire as shown in FIG. 8, is used as a touch line during touch scanning, and is used as a common electrode for the rest of the time.
  • the second seed pixel is used for the blue color resisting B sub-pixel, and the touch lead is placed in the blue color resisting B sub-pixel, so that the display transmittance is not greatly reduced.
  • 9 to 13 are diagrams showing the structure of each layer of the second seed pixel.
  • Figure 14 shows the complete pixel structure diagram.
  • the pixel is composed of two sub-pixels, where R, G are composed of a first seed pixel and B is composed of a second seed pixel.
  • the pixel array structure is formed by periodically arranging the pixels shown in FIG. 14 as repeating units. There are multiple sensors in the touch display, each of which is a pixel array.
  • the liquid crystal display device of the present invention includes a pixel array device and a color filter substrate.
  • the array substrate includes a plurality of pixel units arranged in an array, each pixel unit including a red sub-pixel and a green sub-pixel.
  • the pixel and the blue sub-pixel are implemented by using a touch lead.
  • the common electrode covering the data line between the blue sub-pixel and the red sub-pixel of two adjacent pixel units is set as a touch lead.
  • the touch lead is used as a touch line in the touch scanning stage and as a common electrode in the non-touch scanning stage. Two adjacent rows of pixels are multiplexed into a common electrode of the touch lead to be connected to each other.
  • the driving method of the liquid crystal display device with the touch sensor is: the touch scanning stage, the touch driving signal is loaded to the touch electrode through the touch lead, the touch electrode outputs the sensing signal, and the touch electrode and the touch
  • the control signal detecting module is connected, and the touch signal detecting module determines the touch position according to the sensing signal output by the touch electrode; the non-touch scanning phase, that is, the display phase, loads the common electrode signal to the touch electrode through the touch lead.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Computer Hardware Design (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种具有触控感测器的液晶显示装置，将覆盖像素的数据线(1-1)作为触控引线，其中，液晶显示装置包括相对设置的阵列基板(21)和彩膜基板(22)，阵列基板(21)包括若干阵列排列的像素单元(10)，每个像素单元(10)包括红色子像素、绿色子像素和蓝色子像素，两个相邻像素单元(10)的蓝色子像素和红色子像素之间覆盖数据线(1-1)的公共电极(1-3)设置为触控引线。能够减小引入触控电极引线造成的像素透光率下降。

Description

具有触控感测器的液晶显示装置及其驱动方法
相关申请的交叉引用
本申请要求享有于2016年8月31日提交的名称为“具有触控感测器的液晶显示装置及其驱动方法”的中国专利申请CN201610792710.1的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种具有触控功能的液晶显示装置。
背景技术
液晶显示器(LCD，Liquid Crystal Display)是目前使用最广泛的一种平板显示器，已经逐渐成为各种电子设备如移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕所广泛应用的具有高分辨率彩色屏幕的显示器。随着液晶显示器技术的发展进步，人们对液晶显示器的显示品质、外观设计、人机界面等提出了更高的要求，触控技术因具有操作方便，高度集成等特点成为技术发展的热点。现有薄膜晶体管液晶显示器主要包含两片玻璃基板以及一液晶层，其中上层玻璃基板表面设有彩色滤光片；而下层玻璃基板则设有薄膜晶体管与像素电极。每个像素都是由三个液晶单元格构成，其中每个单元格前面分别由红色、绿色或蓝色过滤器，这样，通过不同单元格的光线就可以在屏幕上显示出不同的颜色、
触控技术人们并不陌生，银行的取款机大多有触摸屏功能，很多医院、图书馆等的大厅都有这种触控技术的电脑，支持触摸屏的手机、MP3、数码相机也很多。这些已经存在的触控幕可分为单点触控，即识别和支持每次一个手指的触控、点击；另一类多点触控技术(Multi-Touch)，能把任务分解为两个方面的工作，一是同时采集多点信号，二是对每路信号的意义进行判断，也就是所谓的手势识别，从而实现屏幕识别人的五个手指同时做的点击、触控动作。
目前，为了实现触控显示器的薄型化和轻量化，将触控面板和液晶显示面板一体化的研究日渐盛行。其中，将触控面板嵌入到液晶显示面板内部的内嵌式(In-Cell)触控方案受到人们的广泛关注。In-Cell触控方案包括自电容触控和互电容触控两种方式。
自电容触控方式：将阵列基板上用作公共(VCOM)电极的透明导电层分割成若干方块作为触控传感器单元，利用特定的金属走线一端通过过孔和触控传感器单元连通，另一端连接至驱动集成电路，当手指触碰触控显示面板时，会引起相应位置处触控传感器单元电容值的波动，驱动集成电路通过检测电容值的波动能够确定触碰点的位置，从而实现触控功能。
互电容触控方式：在阵列基板上设计横向驱动电极(Tx)线，在彩膜基板上设计纵向感应电极(Rx)线，Tx线依次发射激励信号，所有Rx线同时接收信号，得到整个触控显示面板二维平面的电容大小，由此根据电容值的变化量计算出触控点的位置，从而实现触控功能。
综上所述，现有技术自电容触控方式的触控显示面板，由于与触控传感器单元连接的触控引线采用特定的金属，需要增加黑矩阵的宽度对触控引线进行遮挡，是以通常会导致像素开口率和透过率的较大下降，会引起显示器穿透率的大幅下降。
发明内容
针对上述现有技术中的问题，本申请提出了一种具有触控感测器的液晶显示装置及其驱动方法。
本发明所述具有触控感测器的液晶显示装置，将覆盖像素的数据线作为触控引线。
如上所述的具有触控感测器的液晶显示装置，其中，液晶显示装置包括相对设置的阵列基板和彩膜基板，阵列基板包括若干阵列排列的像素单元，每个像素单元包括红色子像素、绿色子像素和蓝色子像素，两个相邻像素单元的蓝色子像素和红色子像素之间覆盖数据线的公共电极设置为触控引线。
如上所述的具有触控感测器的液晶显示装置，其中，该触控引线在触控扫描阶段作为触控线，在非触控扫描阶段作为公共电极。
如上所述的具有触控感测器的液晶显示装置，其中，复用为触控引线的相邻 两行像素的公共电极相互连接。
如上所述的具有触控感测器的液晶显示装置，其中，复用为触控引线的公共电极的宽度大于其余部分公共电极的宽度。
如上所述的具有触控感测器的液晶显示装置，其中，所述公共电极的形状为条形。
如上所述的具有触控感测器的液晶显示装置，其中，所述阵列基板包括若干平行排列的数据线，所述触控引线与数据线同层绝缘设置，每一触控电极至少对应一个触控引线。
具有触控感测器的液晶显示装置的驱动方法，该驱动方法包括：
触控扫描阶段，通过触控引线向触控电极加载触控驱动信号，触控电极输出感应信号，触控电极与触控信号检测模块相连接，触控信号检测模块根据触控电极输出的感应信号确定触控位置；
非触控扫描阶段，通过触控引线向触控电极加载公共电极信号，以实现液晶显示。
本发明的优点：本发明提出的具有触控感测器的液晶显示装置及其驱动方法，在蓝色子像素内增加了触控引线，该引线在触控扫描时作为触控线使用，通过触控引线向触控电极加载触控驱动信号，触控电极输出感应信号，触控电极与触控信号检测模块相连接，触控信号检测模块根据触控电极输出的感应信号确定触控位置，其余时间作为公共电极使用，通过触控引线向触控电极加载公共电极信号，即为显示阶段。将触控引线设置在蓝色子像素内，使像素具有了触控功能，并且不会造成显示器穿透率大幅下降。
上述技术特征可以各种适合的方式组合或由等效的技术特征来替代，只要能够达到本发明的目的。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1是现有技术中的子像素结构，其中1-1表示数据线，1-2表示电极闸线，1-3表示公共电极线，1-4表示薄膜晶体管，1-5表示像素电极；
图2是基于图1子像素结构的像素结构，R表示红色色阻、G表示绿色色阻、B表示蓝色色阻；
图3是基于图2像素结构的像素的GE层别结构图；
图4是基于图2像素结构的像素的AS层别结构图；
图5是基于图2像素结构的像素的SE层别结构图；
图6是基于图2像素结构的像素的VIA层别结构图；
图7是基于图2像素结构的像素的PE层别结构图；
图8是本发明所述的子像素结构其中1-1表示数据线，1-2表示电极闸线，1-3表示公共电极线，1-4表示薄膜晶体管，1-5表示像素电极；
图9是基于图8像素结构的像素GE层别结构图；
图10是基于图8像素结构的像素AS层别结构图；
图11是基于图8像素结构的像素SE层别结构图；
图12是基于图8像素结构的像素VIA层别结构图；
图13是基于图8像素结构的像素PE层别结构图；
图14是基于图1和图8的完整像素结构图，红色色阻子像素和绿色色阻子像素由图1所示子像素构成，蓝色色阻子像素由图8所示子像素构成；
图15是现有技术的自电容触控显示面板的平面结构示意图；
图16是图15中沿AA1方向的截面结构示意图。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例。
具体实施方式
结合附图和本发明具体实施方式的描述，能够更加清楚地了解本发明的细节。但是，在此描述的本发明的具体实施方式，仅用于解释本发明的目的，而不能以任何方式理解成是对本发明的限制。在本发明的教导下，技术人员可以构想基于本发明的任意可能的变形，这些都应被视为属于本发明的范围，下面将结合附图对本发明作进一步说明。
本发明实施例提供了一种具有触控感测器的液晶显示装置及其驱动方法，用以提高触控显示面板的透过率。
本发明是基于以下考虑实现的：
为了解决像素的透过率降低的问题，最直接的手段为减小黑矩阵的宽度，而基于现有技术中的触感显示面板结构而言，单纯减小黑矩阵则会导致液晶偏转紊乱区被暴露，如图16所示，若单纯减少黑矩阵221左侧宽度，则导致公共电极 213与Tx引线212之间的区域暴露，而暴露的该区域液晶由于出于像素电极214与公共电极213所形成的电场边缘，其偏转会出现紊乱，进而影响整体面板显示效果。进一步的，作为解决上述像素开口率和透过率降低的问题的技术手段，同时仍需满足不会造成光效的降低的目的。
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。下面将结合附图对本发明作进一步说明。
现有技术的自电容触控显示面板的平面结构如图15所示，图中沿AA1方向的截面图如图16所示，自电容触控显示面板包括相对设置的阵列基板21和彩膜基板22，阵列基板21采用6道掩膜板制程，依次形成位于衬底基板上的栅极、半导体有源层、像素电极、源极、漏极、钝化层和公共电极。将公共电极分割成若干方块复用为触控电极，每个触控电极通过贯穿钝化层的过孔和一条触控电极(Tx)引线相连，Tx引线最后连接到集成显示和触控功能的驱动集成电路上。
如图15所示，阵列基板包括若干阵列排列的像素单元10，每一像素单元10包括三个子像素单元，分别对应彩膜基板的红色(R)色阻、绿色(G)色阻和蓝色(B)色阻，一个像素单元10中包括三条数据(Data)线和一条Tx引线，Data线和Tx引线共用同一层金属，一个像素单元中的Tx引线和下一个像素单元的Data线组成双源结构。具体地，图中像素单元10中包括Data1、Data2和Data3三条Data线和一条Tx引线，Tx引线和下一个像素单元中的Data4组成双源结构。
如图16所示，为了直观的说明阵列基板21双源结构位置处对应的彩膜基板22上的黑矩阵221的宽度，图16中给出了通常设置的各个部分的宽度。从图中可以看到，Data线211的宽度为3微米(μm)，Tx引线212的宽度为3μm，Data线211和Tx引线212之间的距离为3μm，为了保证黑矩阵221开口区的设计在三个子像素单元处都一致，Tx引线212左侧需要设计一条公共电极，Tx引线212和Tx引线212左侧的公共电极213之间的距离为2.5μm，以保证工艺波动最差的情况下，Tx引线和公共电极之间不会发生交叠；Tx引线212左侧公共电极213的宽度为3μm，黑矩阵221右侧边缘距离Data线211的右侧边缘的值为1.5μm，黑矩阵221左侧边缘距离Tx引线212的左侧边缘的值为4μm，Tx引线212与像素电极214之间的距离为7.5μm，Data线211与像素电极214之间的距离为5μm，公共电极的宽度W1，以及相邻两个公共电极之间 的距离S1根据实际的生产可以设置为不同的值，从图中可以看到，黑矩阵221的宽度为14.5μm。图中标号215和标号216均表示绝缘层。
现有技术的双源结构设计中，因Tx引线和Data线共用同一层金属，Tx引线的引入会造成像素开口区的减小，从而导致像素透过率的较大降低。
现有技术还提供了一种自电容触控显示面板，其阵列基板包括位于衬底基板上的公共电极，公共电极复用为若干触控电极，每一触控电极电连接一触控电极引线，触控电极引线复用为公共电极线，触控电极引线与数据线同层绝缘设置，每一触控电极至少对应一触控电极引线，每一像素单元对应一触控电极引线，触控电极引线设置在相邻两个像素单元之间，触控电极引线与蓝色子像素单元紧邻设置。
为了提高触控显示面板的透过率，本发明具体实施例提供一种具有触控感测器的液晶显示装置，液晶显示装置包括相对设置的阵列基板和彩膜基板，阵列基板包括若干阵列排列的像素单元，每个像素单元包括红色子像素、绿色子像素和蓝色子像素，触控功能采用触控引线实现，两个相邻像素单元的蓝色子像素和红色子像素之间覆盖数据线的公共电极设置为触控引线。
本发明的具体实施例提供了一种具有触控感测器的液晶显示装置，将相邻两个像素的蓝色子像素和红色子像素之间覆盖数据线的这部分公共电极设置为触控引线，相邻两行像素复用为触控引线的这部分公共电极相互连接，其余部分公共电极不相互连接，复用为触控引线的这部分公共电极的宽度比其余部分公共电极的宽度要宽。
如图1和图2所示，图1是现有技术中的子像素结构，图2是基于图1子像素结构的像素结构，图3-图7是基于图2像素结构的像素各层别结构图；
由于触控显示面板在显示和触控阶段，Tx引线上加载的信号始终和公共电极的信号保持一致，本发明具体实施例将触控电极引线复用为公共电极线，而无需像现有技术在触控电极引线旁边再额外设计一条公共电极，从而能够减小因触控电极引线的引入造成的像素透光率的下降。
下面结合附图详细介绍本发明具体实施例提供的具有触控感测器的触控显示面板。
本发明的每个像素包括两种子像素，第一种子像素与传统的像素相同，如图1所示，用于红色色阻R子像素、绿色色阻G子像素。第二种子像素内增加触控 引线，如图8所示，该引线在触控扫描时作为触控线使用，其余时间作为公共电极使用。第二种子像素用于蓝色色阻B子像素，触控引线放置在蓝色色阻B子像素内，不会造成显示器穿透率大幅下降。图9-图13是第二种子像素的各层别结构图。
图14所示为完整的像素结构图。该像素由两种子像素构成，其中R、G由第一种子像素构成，B由第二种子像素构成。
像素阵列结构是以图14所示像素为重复单元，周期性排列而成。触控显示器内由多个传感器，每个传感器均为像素阵列。
本发明所述具有触控感测器的液晶显示装置，液晶显示装置包括相对设置的阵列基板和彩膜基板，阵列基板包括若干阵列排列的像素单元，每个像素单元包括红色子像素、绿色子像素和蓝色子像素，触控功能采用触控引线实现，两个相邻像素单元的蓝色子像素和红色子像素之间覆盖数据线的公共电极设置为触控引线。该触控引线在触控扫描阶段作为触控线，在非触控扫描阶段作为公共电极。相邻两行像素复用为触控引线的公共电极相互连接。
具有触控感测器的液晶显示装置的驱动方法，该驱动方法为：触控扫描阶段，通过触控引线向触控电极加载触控驱动信号，触控电极输出感应信号，触控电极与触控信号检测模块相连接，触控信号检测模块根据触控电极输出的感应信号确定触控位置；非触控扫描阶段，即显示阶段，通过触控引线向触控电极加载公共电极信号。
虽然在本文中参照了特定的实施方式来描述本发明，但是应该理解的是，这些实施例仅仅是本发明的原理和应用的示例。因此应该理解的是，可以对示例性的实施例进行许多修改，并且可以设计出其他的布置，只要不偏离所附权利要求所限定的本发明的精神和范围。应该理解的是，可以通过不同于原始权利要求所描述的方式来结合不同的从属权利要求和本文中所述的特征。还可以理解的是，结合单独实施例所描述的特征可以使用在其他所述实施例中。

Claims (10)

  1. 具有触控感测器的液晶显示装置，其中，将覆盖像素的数据线作为触控引线。
  2. 根据权利要求1所述的具有触控感测器的液晶显示装置，其中，液晶显示装置包括相对设置的阵列基板和彩膜基板，阵列基板包括若干阵列排列的像素单元，每个像素单元包括红色子像素、绿色子像素和蓝色子像素，两个相邻像素单元的蓝色子像素和红色子像素之间覆盖数据线的公共电极设置为触控引线。
  3. 根据权利要求2所述的具有触控感测器的液晶显示装置，其中，该触控引线在触控扫描阶段作为触控线，在非触控扫描阶段作为公共电极。
  4. 根据权利要求2所述的具有触控感测器的液晶显示装置，其中，复用为触控引线的相邻两行像素的公共电极相互连接。
  5. 根据权利要求3所述的具有触控感测器的液晶显示装置，其中，复用为触控引线的公共电极的宽度大于其余部分公共电极的宽度。
  6. 根据权利要求3所述的具有触控感测器的液晶显示装置，其中，所述公共电极的形状为条形。
  7. 根据权利要求3所述的具有触控感测器的液晶显示装置，其中，所述阵列基板包括若干平行排列的数据线，所述触控引线与数据线同层绝缘设置，每一触控电极至少对应一个触控引线。
  8. 根据权利要求3所述的具有触控感测器的液晶显示装置，其中，复用为触控引线的相邻两行像素的公共电极相互连接。
  9. 根据权利要求2所述的具有触控感测器的液晶显示装置，其中，所述阵列基板包括若干平行排列的数据线，所述触控引线与数据线同层绝缘设置，每一触控电极至少对应一个触控引线。
  10. 具有触控感测器的液晶显示装置的驱动方法，其中，该驱动方法包括：
    触控扫描阶段，通过触控引线向触控电极加载触控驱动信号，触控电极输出感应信号，触控电极与触控信号检测模块相连接，触控信号检测模块根据触控电极输出的感应信号确定触控位置；
    非触控扫描阶段，通过触控引线向触控电极加载公共电极信号，以实现液晶显示。
PCT/CN2016/101892 2016-08-31 2016-10-12 具有触控感测器的液晶显示装置及其驱动方法 WO2018040233A1 (zh)

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