WO2015180318A1 - 内嵌式触摸屏及显示装置 - Google Patents

内嵌式触摸屏及显示装置 Download PDF

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Publication number
WO2015180318A1
WO2015180318A1 PCT/CN2014/087023 CN2014087023W WO2015180318A1 WO 2015180318 A1 WO2015180318 A1 WO 2015180318A1 CN 2014087023 W CN2014087023 W CN 2014087023W WO 2015180318 A1 WO2015180318 A1 WO 2015180318A1
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Prior art keywords
self
capacitance
touch panel
electrodes
array substrate
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PCT/CN2014/087023
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English (en)
French (fr)
Inventor
王磊
薛海林
薛艳娜
袁洪亮
刘英明
王春雷
王海生
陈小川
王世君
许睿
谢晓波
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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Application filed by 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 filed Critical 京东方科技集团股份有限公司
Priority to EP14863068.4A priority Critical patent/EP3153953A4/en
Priority to US14/648,034 priority patent/US9830029B2/en
Publication of WO2015180318A1 publication Critical patent/WO2015180318A1/zh

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    • 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
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    • 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
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
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    • G06F—ELECTRIC DIGITAL DATA PROCESSING
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    • 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
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    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
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    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
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    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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    • 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
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    • G06F2203/048—Indexing scheme relating to G06F3/048
    • G06F2203/04808—Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0252—Improving the response speed
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09218—Conductive traces
    • H05K2201/09227—Layout details of a plurality of traces, e.g. escape layout for Ball Grid Array [BGA] mounting
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
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    • H05K2201/09218—Conductive traces
    • H05K2201/09245—Crossing layout
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10128—Display
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10151—Sensor

Definitions

  • Embodiments of the present invention relate to an in-cell touch panel and display device.
  • the Touch Screen Panel has gradually spread throughout people's lives.
  • the touch screen can be divided into an Add-on Mode Touch Panel, an On-Cell Touch Panel, and an In-Cell Touch Panel.
  • the external touch screen is produced by separately separating the touch screen from the liquid crystal display (LCD), and then bonding them together to form a liquid crystal display with touch function.
  • the external touch screen has high manufacturing cost, low light transmittance, and mode.
  • the group is thicker.
  • the in-cell touch screen embeds the touch electrode of the touch screen in the interior of the liquid crystal display, which can reduce the overall thickness of the module, and can greatly reduce the manufacturing cost of the touch screen, and is highly valued by the major panel manufacturers.
  • an in-cell touch screen can realize the detection of a finger touch position by utilizing the principle of mutual capacitance or self-capacitance.
  • a plurality of self-capacitance electrodes arranged in the same layer and insulated from each other can be disposed in the touch screen.
  • the capacitance of the respective capacitor electrodes is a fixed value
  • the capacitance of the corresponding self-capacitance electrode is a fixed value superimposed on the human body capacitance.
  • the touch detection chip can determine the touch position by detecting a change in the capacitance value of each capacitor electrode during the touch period.
  • the touch screen prepared by the self-capacitance principle is more sensitive to the touch change caused by the human body touching the screen than the mutual capacitance principle.
  • the prepared touch screen. Therefore, the touch screen relative to the mutual capacitance can effectively improve the signal-to-noise ratio of the touch, thereby improving the accuracy of the touch sensing.
  • At least one embodiment of the present invention provides an in-cell touch panel and a display device, which can reduce the production cost of the in-cell touch panel and improve production efficiency.
  • An in-cell touch panel provided by at least one embodiment of the present invention includes: a pixel electrode An array substrate; a plurality of self-capacitance electrodes disposed on the array substrate and independent of each other; and a touch detection chip for determining a touch position by detecting a change in a capacitance value of each of the self-capacitance electrodes;
  • the pixel electrode is disposed in the same layer, and is located at a gap between two adjacent pixel electrodes and is used for connecting the self-capacitance electrode to the wire of the touch detection chip.
  • a display device includes the above-described in-cell touch panel provided by the embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of an in-cell touch panel according to an embodiment of the present invention.
  • FIG. 2 and FIG. 3 are schematic diagrams showing the structure of an in-cell touch panel using a common electrode layer multiplexed self-capacitance electrode according to an embodiment of the present invention
  • FIGS. 4a and 4b are schematic diagrams showing driving timings of an in-cell touch panel according to an embodiment of the present invention.
  • 5a and 5b are schematic structural views showing the opposite sides of adjacent self-capacitance electrodes in the in-cell touch panel provided as fold lines, respectively.
  • each film layer in the drawings do not reflect the true scale, and are merely intended to illustrate the present invention.
  • a wire corresponding to the self-capacitance electrode is generally disposed.
  • the pattern of the wire and the self-capacitance electrode may be disposed on the same film layer, or the pattern of the wire and the self-capacitance electrode may be disposed in a different layer.
  • Wire and self-capacitance electrode Although the same layer setting can avoid adding a new patterning process, the self-capacitance electrodes and the wires are arranged in the same layer to form a touch dead zone, and the wires connecting the plurality of self-capacitance electrodes in the touch blind zone pass through the touch dead zone, so The signal in this touch blind zone is relatively turbulent, and the touch performance in this area cannot be guaranteed. Based on the above considerations, in a specific implementation, the wires and the self-capacitance electrodes are generally disposed in different layers.
  • the wires and the self-capacitance electrodes are disposed in different layers, and it is necessary to add two new film layers inside the display panel, which leads to the need to add a new process when manufacturing the panel, which increases the production cost and is not conducive to improving the production efficiency. .
  • An in-cell touch panel provided by at least one embodiment of the present invention, as shown in FIG. 1 , includes an array substrate 02 having a pixel electrode 01, and further includes: a plurality of layers disposed on the array substrate 02 and independent of each other The self-capacitance electrode 03; the touch detection chip 04 for determining the touch position by detecting the change of the capacitance value of the respective capacitor electrode 03 during the touch period; being disposed in the same layer as the pixel electrode 01, located at the adjacent two pixel electrodes A gap 05 is used between the 01 and the self-capacitance electrode 03 is connected to the wire 05 of the touch detection chip 04.
  • the touch detection chip 04 is disposed on the second substrate 02 in FIG. 1, it may be disposed on the first substrate 01 or connected to the second substrate 02 or the like through a flexible circuit board or the like.
  • a plurality of self-capacitance electrodes 03 of the same layer and independent of each other are disposed on the array substrate 02 by using the principle of self-capacitance, and the touch detection chip 04 passes through the touch time period.
  • a change in the capacitance value of each of the capacitor electrodes 03 is detected to determine the touch position, and a wire 05 in the same layer as the pixel electrode 01 is provided at the gap of each pixel electrode 01, and the wire 05 is used to connect the self-capacitance electrode 03 to Touch detection chip 04.
  • the touch screen provided by the embodiment of the present invention changes the pattern of the pixel electrode layer, the wire 05 connected to the self-capacitance electrode 03 is formed at the gap of each pixel electrode 01, and therefore, based on the preparation process of the array substrate, By adding a process of manufacturing two layers of film, it is only necessary to add a process of forming a self-capacitance electrode to realize the touch function, which saves production cost and improves production efficiency.
  • the wire 05 connected to the self-capacitance electrode 03 disposed at the gap of each pixel electrode 01 does not affect the aperture ratio of the display region, and further, may be designed according to actual conditions.
  • the pattern of each of the wires 05 is set to a horizontal strip-like structure, and may be set to a longitudinal strip-like structure, or may be arranged as a horizontally and vertically interlaced mesh structure, as shown in FIG. 2, which is not limited herein.
  • the touch screen provided by the embodiment of the invention is applicable to both a twisted nematic (TN) liquid crystal display and an advanced dual-dimensional field switch (ADS) type liquid crystal display and an in-plane switch ( In-Plane Switch, IPS) LCD display.
  • TN twisted nematic
  • ADS advanced dual-dimensional field switch
  • IPS in-plane switch
  • the common electrode layer 06 in the array substrate 02 may be multiplexed with the self-capacitance electrode 03, that is, the respective capacitor electrodes.
  • the common electrode layer 06 on the array substrate 02 is formed by changing the structure of the common electrode layer 06 into the self-capacitance electrode 03 to realize the touch function. On the basis of the preparation process of the array substrate, no additional process is required. It can save production costs and increase production efficiency.
  • the common electrode layer 06 is located as a plate electrode on the lower layer (closer to the base substrate), and the pixel electrode 01 is located as a slit electrode on the upper layer (closer)
  • the liquid crystal layer that is, the common electrode layer 06 is located between the pixel electrode 01 and the array substrate 02, and an insulating layer may be provided between the pixel electrode 01 and the common electrode layer 06.
  • the pixel electrode 01 When applied to a HADS type liquid crystal panel, the pixel electrode 01 is located as a plate electrode in the lower layer (closer to the substrate), and the common electrode layer 06 is located as a slit electrode in the upper layer (closer to the liquid crystal layer), that is, the pixel electrode 01 is located at the common electrode. Between the layer 06 and the array substrate 02, and an insulating layer may be further provided between the pixel electrode 01 and the common electrode layer 06.
  • the density of the touch screen is usually on the order of millimeters, so the density and the occupied area of the respective capacitor electrodes 03 can be selected according to the required touch density to ensure the required touch density.
  • the respective capacitor electrodes 03 are designed to be 5 mm*5 mm. Square electrodes on the left and right.
  • the density of the display is typically on the order of microns, so a self-capacitor electrode 03 can correspond to multiple pixels in the display.
  • the common electrode layer 06 disposed on the array substrate 02 is divided into a plurality of self-capacitance electrodes 03, in order not to affect the normal display function,
  • the common electrode layer 06 is divided, various implementations are possible.
  • an implementation manner is: avoiding the dividing line from the displayed opening area, and setting the pattern area in the black matrix layer, that is, the orthographic projection of the gap between the adjacent two self-capacitance electrodes 03 on the array substrate 02. It will be located at the gap between two adjacent pixel electrodes 01, as shown in FIG.
  • Another implementation manner is: when the common electrode layer 06 is located above the pixel electrode 01, that is, when the pixel electrode 01 is located between the common electrode layer 06 and the array substrate 02, the common electrode layer 06 has a region corresponding to the pixel electrode 01.
  • Strip slit a as shown in FIG. 3, along the common electrode layer 06 The common strip slit a and the direction b intersecting the strip slit divide the common electrode layer 06 into a plurality of self-capacitance electrodes 03.
  • the provision of the division gap at the strip-shaped slit a does not affect the normal display; and when the division gap of the direction b intersecting the strip-shaped slit a is set, In order not to affect the normal display function, the division gap of the direction b intersecting the strip slit a should be avoided in the open area of the display and set in the pattern area of the black matrix layer.
  • the above-mentioned touch screen provided by at least one embodiment of the present invention is multiplexed by the common electrode layer 06 as the self-capacitance electrode 03.
  • a touch-time and display-stage driving method can be adopted.
  • the display driver chip and the touch detection chip can be integrated into one chip, further reducing production costs.
  • the time of displaying each frame (V-sync) of the touch screen is divided into a display period (Display) and a touch period (Touch), and the driving timing shown is shown.
  • the time of displaying one frame of the touch screen is 16.7 milliseconds (ms), and 5 ms is selected as the touch time period, and the other 11.7 ms is used as the display time period.
  • the duration of the two chips can be appropriately adjusted according to the processing capability of the IC chip, and is not specifically limited herein.
  • a gate scan signal is sequentially applied to each of the gate signal lines Gate1, Gate2, ..., Gate n in the touch screen, and a gray scale signal is applied to the data signal line Data, and the respective capacitor electrodes Cx1 ... Cx n
  • the connected touch detection chip respectively applies a common electrode signal to the respective capacitance electrodes Cx1 . . . Cx n to realize a liquid crystal display function.
  • the touch detection chip connected to the respective capacitor electrodes Cx1 . . . Cx n simultaneously applies driving signals to the respective capacitor electrodes Cx1 . . . Cx n while receiving the respective capacitor electrodes.
  • Cx n may also be as shown in FIG. 4b, and the touch detection chips connected to the respective capacitance electrodes Cx1 ... Cx n sequentially apply driving signals to the respective capacitance electrodes Cx1 ... Cx n to receive the respective signals.
  • the feedback signals of the capacitor electrodes Cx1 . . . Cx n are not limited herein, and the touch signal is realized by analyzing the feedback signal to determine whether a touch occurs.
  • the human body capacitance acts on the self-capacitance of the respective capacitor electrodes 03 by direct coupling, when the human body touches the screen, only under the touch position
  • the capacitance value of the self-capacitance electrode 03 has a large amount of change, and the capacitance value of the self-capacitance electrode 03 adjacent to the self-capacitance electrode 03 under the touch position is very small, so that the self-capacitance cannot be determined when sliding on the touch screen.
  • the opposite sides of the adjacent two self-capacitance electrodes 03 may be set as fold lines to increase the self-capacitance located below the touch position.
  • the overall shape of the respective capacitor electrodes 03 can be set in one or a combination of the following two ways.
  • the sides of the adjacent two self-capacitance electrodes 03, which are opposite to each other, may be arranged in a stepped structure, and the two stepped structures have the same shape and match each other, as shown in FIG. 5a, and FIG. 5a shows 2 * 2 self-capacitor electrodes 03;
  • the sides of the adjacent two self-capacitance electrodes 03, which are opposite to each other, may be arranged in a concave-convex structure, and the two concave-convex structures have the same shape and match each other, as shown in FIG. 5b, and FIG. 5b shows 2 * 2 self-capacitor electrodes 03.
  • each film layer on the array substrate 02 can be fabricated by any known patterning process.
  • 8 patterning processes can be used: gate and gate line patterning ⁇ active layer patterning.
  • First insulating layer patterning ⁇ Data line and source and drain patterning ⁇ Resin layer patterning ⁇ Pixel electrode patterning ⁇ Second insulating layer patterning ⁇ Common electrode layer patterning;
  • 7-time patterning process and 6-time patterning process can be used as needed Or 5 patterning processes, which are not limited herein.
  • At least one embodiment of the present invention further provides a display device including the above-described in-cell touch panel provided by at least one embodiment of the present invention.
  • the display device may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a watch, and the like.
  • a display device may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a watch, and the like.
  • the in-cell touch panel and the display device are provided with a plurality of self-capacitance electrodes of the same layer and independent of each other on the array substrate by using the principle of self-capacitance, and the touch detection chip passes through the touch time period.
  • a change in the capacitance value of each of the capacitor electrodes is detected to determine the touch position, and a wire in the same layer as the pixel electrode is disposed at a gap of each pixel electrode, and the wire is used to connect the self-capacitance electrode to the touch detection chip.
  • the touch screen provided by at least one embodiment of the present invention designs the pattern of the pixel electrode layer, a wire connected to the self-capacitance electrode is formed at a gap of each pixel electrode, and therefore, an increase is required on the basis of the preparation process of the array substrate.
  • the manufacturing process of the two-layer film layer only needs to add a process of forming a self-capacitance electrode to realize the touch function, which saves production cost and improves production efficiency.

Abstract

一种内嵌式触摸屏及显示装置，该内嵌式触摸屏利用自电容的原理在阵列基板（02）上设置多个同层且相互独立的自电容电极（03），触控侦测芯片（04）通过检测各自电容电极（03）的电容值变化可以判断出触控位置，在各像素电极（01）的间隙处设置有与像素电极（01）同层的导线（05），该导线（05）用于将自电容电极（03）连接至触控侦测芯片（04）。所述触摸屏可节省生产成本，提高生产效率。

Description

内嵌式触摸屏及显示装置 技术领域
本发明的实施例涉及一种内嵌式触摸屏及显示装置。
背景技术
随着显示技术的飞速发展，触摸屏(Touch Screen Panel)已经逐渐遍及人们的生活中。目前，触摸屏按照组成结构可以分为：外挂式触摸屏(Add-on Mode Touch Panel)、覆盖表面式触摸屏(On-Cell Touch Panel)、以及内嵌式触摸屏(In-Cell Touch Panel)。外挂式触摸屏是将触摸屏与液晶显示屏(Liquid Crystal Display，LCD)分开生产，然后贴合到一起成为具有触摸功能的液晶显示屏，外挂式触摸屏制作成本较高、光透过率较低、模组较厚。而内嵌式触摸屏将触摸屏的触控电极内嵌在液晶显示屏内部，可以减薄模组整体的厚度，又可以大大降低触摸屏的制作成本，受到各大面板厂家重视。
目前，内嵌(In-cell)式触摸屏可以是利用互电容或自电容的原理实现检测手指触摸位置。利用自电容的原理可以在触摸屏中设置多个同层设置且相互绝缘的自电容电极，当人体未触碰屏幕时，各自电容电极所承受的电容为一固定值，当人体触碰屏幕时，对应的自电容电极所承受的电容为固定值叠加人体电容。触控侦测芯片在触控时间段通过检测各自电容电极的电容值变化可以判断出触控位置。由于人体电容可以作用于全部自电容，而人体电容仅能作用于互电容中的投射电容，因此利用自电容原理制备的触摸屏由人体碰触屏幕所引起的触控变化量会大于利用互电容原理制备出的触摸屏。因此，相对于互电容的触摸屏能有效提高触控的信噪比，从而提高触控感应的准确性。
发明内容
本发明至少一实施例提供了一种内嵌式触摸屏及显示装置，可以降低内嵌式触摸屏的生产成本、提高生产效率。
本发明至少一实施例提供的一种内嵌式触摸屏，包括：具有像素电极的 阵列基板；设置于所述阵列基板上的多个同层设置且相互独立的自电容电极；通过检测各所述自电容电极的电容值变化以判断触控位置的触控侦测芯片；与所述像素电极同层设置，位于相邻的两个所述像素电极之间间隙处且用于将所述自电容电极连接至所述触控侦测芯片的导线。
本发明至少一实施例提供的一种显示装置，包括本发明实施例提供的上述内嵌式触摸屏。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1为本发明实施例提供的内嵌式触摸屏的结构示意图；
图2和图3分别为本发明实施例提供的内嵌式触摸屏采用公共电极层复用自电容电极的结构示意图；
图4a和图4b分别为本发明实施例提供的内嵌式触摸屏的驱动时序示意图；
图5a和图5b分别为本发明实施例提供的内嵌式触摸屏中相邻的自电容电极相对的侧边设置为折线的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明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发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
在附图中各膜层的厚度和形状不反映真实比例，目的只是示意说明本发明内容。
在内嵌式触摸屏中，为了将自电容电极与触控侦测芯片连接，一般会设置与自电容电极对应连接的导线。可以将导线与自电容电极的图形设置在同一膜层，也可以将导线与自电容电极的图形异层设置。将导线和自电容电极 同层设置虽然可以避免增加新的构图工艺，但是，将自电容电极和导线同层设置会形成触控盲区，在触控盲区内连接多个自电容电极的导线均经过该触控盲区，因此，在这个触控盲区内的信号相对比较紊乱，在该区域内的触控性能无法保证。基于上述考虑，在具体实施时，一般将导线和自电容电极异层设置。
在内嵌式触摸屏中将导线和自电容电极异层设置，需要在显示面板内部增加新的两个膜层，导致在制作面板时需要增加新的工艺，使生产成本增加，不利于提高生产效率。
本发明至少一实施例提供的一种内嵌式触摸屏，如图1所示，包括具有像素电极01的阵列基板02，并且还包括：设置于阵列基板02上的多个同层设置且相互独立的自电容电极03；在触控时间段通过检测各自电容电极03的电容值变化以判断触控位置的触控侦测芯片04；与像素电极01同层设置，位于相邻的两个像素电极01之间间隙处且用于将自电容电极03连接至触控侦测芯片04的导线05。
虽然在图1中，触控侦测芯片04设置在第二基板02上，但是其也可以设置在第一基板01之上，或者通过柔性电路板等连接到第二基板02等。
本发明至少一实施例提供的上述内嵌式触摸屏，利用自电容的原理在阵列基板02上设置多个同层且相互独立的自电容电极03，触控侦测芯片04在触控时间段通过检测各自电容电极03的电容值变化可以判断出触控位置，并且，在各像素电极01的间隙处设置有与像素电极01同层的导线05，该导线05用于将自电容电极03连接至触控侦测芯片04。
由于本发明实施例提供的触摸屏是对像素电极层的图形进行变更，在各像素电极01的间隙处形成与自电容电极03连接的导线05，因此，相对于需要在阵列基板制备工艺的基础上增加两层膜层的制作工艺，仅需增加一层形成自电容电极的工艺即可实现触控功能，节省了生产成本，提高了生产效率。
例如，本发明至少一实施例提供的上述触摸屏中，在各像素电极01的间隙处设置的与自电容电极03连接的导线05不会影响显示区域的开口率，进一步地，可以根据实际设计的需要，将各导线05的图形设置成横向条状结构，也可以设置成纵向条状结构，还可以设置成横纵交错的网状结构，如图2所示，在此不做限定。
本发明实施例提供的上述触摸屏，既适用于扭转向列(Twisted Nematic,TN)型液晶显示屏，也适用于高级超维场开关(Adwanced Dimension Switch,ADS)型液晶显示屏和平面内开关(In-Plane Switch,IPS)型液晶显示屏。
当本发明至少一实施例提供的上述触摸屏应用于ADS型液晶屏时，如图1和图2所示，可以采用阵列基板02中的公共电极层06复用自电容电极03，即各自电容电极03组成阵列基板02上的公共电极层06，在将公共电极层06的结构进行变更分割成自电容电极03以实现触控功能时，在阵列基板制备工艺的基础上，不需要增加额外的工艺，可以节省生产成本，提高生产效率。
进一步地，在本发明实例提供的上述触摸屏应用于传统ADS型液晶面板时，公共电极层06作为板状电极位于下层(更靠近衬底基板)，像素电极01作为狭缝电极位于上层(更靠近液晶层)，即公共电极层06位于像素电极01与阵列基板02之间，并且，在像素电极01和公共电极层06之间可以设有绝缘层。而应用于HADS型液晶面板时，像素电极01作为板状电极位于下层(更靠近衬底基板)，公共电极层06作为狭缝电极位于上层(更靠近液晶层)，即像素电极01位于公共电极层06与阵列基板02之间，并且，在像素电极01和公共电极层06之间还可以设有绝缘层。
一般地，触摸屏的密度通常在毫米级，因此可以根据所需的触控密度选择各自电容电极03的密度和所占面积以保证所需的触控密度，通常各自电容电极03设计为5mm*5mm左右的方形电极。显示屏的密度通常在微米级，因此一个自电容电极03可以对应显示屏中的多个像素。
在本发明至少一个实施例提供的上述内嵌式触摸屏中，当采用将整层设置在阵列基板02上的公共电极层06分割成多个自电容电极03时，为了不影响正常的显示功能，在对公共电极层06进行分割时，可以多种实现方式。
例如，一种实现方式为：将分割线避开显示的开口区域，设置在黑矩阵层的图形区域，即相邻的两个自电容电极03之间的间隙在阵列基板02上的正投影一般会位于相邻的两个像素电极01之间的间隙处，如图2所示。
另一种实现方式为：在公共电极层06位于像素电极01上方时，即像素电极01位于公共电极层06与阵列基板02之间时，公共电极层06在与像素电极01对应的区域会具有条状缝隙a；如图3所示，可以沿着公共电极层06 原有的条状缝隙a以及与条状缝隙交叉的方向b，将公共电极层06分割成多个自电容电极03。由于在条状缝隙a处原本没有公共电极层06的图形，因此，在条状缝隙a处设置分割间隙不会影响正常的显示；而在设置与条状缝隙a交叉的方向b的分割间隙时，为了不影响正常的显示功能，该与条状缝隙a交叉的方向b的分割间隙应避开显示的开口区域，设置在黑矩阵层的图形区域。
由于本发明至少一实施例提供的上述触摸屏采用公共电极层06复用作为自电容电极03，为了减少显示和触控信号之间的相互干扰，可以采用触控和显示阶段分时驱动的方式。在至少一个实施例中，可以将显示驱动芯片和触控侦测芯片整合为一个芯片，进一步降低生产成本。
例如：如图4a和图4b所示的驱动时序图中，将触摸屏显示每一帧(V-sync)的时间分成显示时间段(Display)和触控时间段(Touch)，所示的驱动时序图中触摸屏的显示一帧的时间为16.7毫秒(ms)，选取其中5ms作为触控时间段，其他的11.7ms作为显示时间段。当然也可以根据IC芯片的处理能力适当的调整两者的时长，在此不做具体限定。在显示时间段(Display)，对触摸屏中的每条栅极信号线Gate1，Gate2……Gate n依次施加栅扫描信号，对数据信号线Data施加灰阶信号，与各自电容电极Cx1……Cx n连接的触控侦测芯片向各自电容电极Cx1……Cx n分别施加公共电极信号，以实现液晶显示功能。在触控时间段(Touch)，如图4a所示，与各自电容电极Cx1……Cx n连接的触控侦测芯片向各自电容电极Cx1……Cx n同时施加驱动信号，同时接收各自电容电极Cx1……Cx n的反馈信号；也可以如图4b所示，与各自电容电极Cx1……Cx n连接的触控侦测芯片向各自电容电极Cx1……Cx n依次施加驱动信号，分别接收各自电容电极Cx1……Cx n的反馈信号，在此不做限定，通过对反馈信号的分析判断是否发生触控，以实现触控功能。
进一步地，在本发明至少一实施例提供的内嵌式触摸屏中，由于人体电容通过直接耦合的方式作用于各自电容电极03的自电容，因此，人体触碰屏幕时，仅在触摸位置下方的自电容电极03的电容值有较大的变化量，与触摸位置下方的自电容电极03相邻的自电容电极03的电容值变化量非常小，这样，在触摸屏上滑动时，不能确定自电容电极03所在区域内的触控坐标。针 对上述情况，在本发明至少一个实施例提供的上述内嵌式触摸屏中，可以将相邻的两个自电容电极03相对的侧边均设置为折线，以便增大位于触摸位置下方的自电容电极03相邻的自电容电极03的电容值变化量。
例如，可以采用如下两种方式之一或组合的方式设置各自电容电极03的整体形状。
1、可以将相邻的两个自电容电极03相对的为折线的侧边均设置为阶梯状结构，两阶梯状结构形状一致且相互匹配，如图5a所示，图5a中示出了2*2个自电容电极03；
2、可以将相邻的两个自电容电极03相对的为折线的侧边均设置为凹凸状结构，两凹凸状结构形状一致且相互匹配，如图5b所示，图5b中示出了2*2个自电容电极03。
本发明至少一实施例提供的上述触摸屏中，可以采用已知的任意种构图流程制作阵列基板02上的各膜层，例如可以采用8次构图工艺：栅极和栅线构图→有源层构图→第一绝缘层构图→数据线和源漏极构图→树脂层构图→像素电极构图→第二绝缘层构图→公共电极层构图；当然也可以根据需要，采用7次构图工艺、6次构图工艺或5次构图工艺，在此不做限定。
本发明至少一实施例还提供了一种显示装置，包括本发明至少一实施例提供的上述内嵌式触摸屏。例如，该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪、手表等任何具有显示功能的产品或部件。该显示装置的实施可以参见上述内嵌式触摸屏的实施例，重复之处不再赘述。
本发明至少一实施例提供的上述内嵌式触摸屏及显示装置，利用自电容的原理在阵列基板上设置多个同层且相互独立的自电容电极，触控侦测芯片在触控时间段通过检测各自电容电极的电容值变化可以判断出触控位置，并且，在各像素电极的间隙处设置与像素电极同层的导线，该导线用于将自电容电极连接至触控侦测芯片。由于本发明至少一实施例提供的触摸屏是对像素电极层的图形进行设计，在各像素电极的间隙处形成与自电容电极连接的导线，因此，相对于需要在阵列基板制备工艺的基础上增加两层膜层的制作工艺，仅需增加一层形成自电容电极的工艺即可实现触控功能，节省了生产成本，提高了生产效率。
以上所述仅是本发明的示范性实施方式，而非用于限制本发明的保护范围，本发明的保护范围由所附的权利要求确定。
本申请要求于2014年5月30日递交的中国专利申请第201410240491.7号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (10)

  1. 一种内嵌式触摸屏，包括：
    具有像素电极的阵列基板，
    设置于所述阵列基板上的多个同层设置且相互独立的自电容电极；
    通过检测各所述自电容电极的电容值变化以判断触控位置的触控侦测芯片；
    与所述像素电极同层设置，位于相邻的两个所述像素电极之间间隙处且用于将所述自电容电极连接至所述触控侦测芯片的导线。
  2. 如权利要求1所述的内嵌式触摸屏，其中，各所述导线具有横向条状结构、纵向条状结构或横纵交错的网状结构。
  3. 如权利要求1或2所述的内嵌式触摸屏，其中，各所述自电容电极组成位于所述阵列基板上的公共电极层。
  4. 如权利要求3所述的内嵌式触摸屏，其中，所述公共电极层位于所述像素电极与所述阵列基板之间，或所述像素电极位于所述公共电极层与所述阵列基板之间。
  5. 如权利要求4所述的内嵌式触摸屏，其中，相邻的两个所述自电容电极之间的间隙在所述阵列基板的正投影均位于相邻的两个所述像素电极之间的间隙处。
  6. 如权利要求4所述的内嵌式触摸屏，其中，所述像素电极位于所述公共电极层与所述阵列基板之间，所述公共电极层在与所述像素电极相对的区域具有条状缝隙；
    所述公共电极层沿着所述条状缝隙以及与所述条状缝隙交叉的方向被分割成多个所述自电容电极。
  7. 如权利要求1-6任一项所述的内嵌式触摸屏，其中，相邻的两个所述自电容电极相对的侧边均为折线。
  8. 如权利要求7所述的内嵌式触摸屏，其中，相邻的两个自电容电极相对的为折线的侧边均具有阶梯状结构，两阶梯状结构形状一致且相互匹配。
  9. 如权利要求7所述的内嵌式触摸屏，其中，相邻的两个自电容电极相对的为折线的侧边均具有凹凸状结构，两凹凸状结构形状一致且相互匹配。
  10. 一种显示装置，包括如权利要求1-9任一项所述的内嵌式触摸屏。
PCT/CN2014/087023 2014-05-30 2014-09-22 内嵌式触摸屏及显示装置 WO2015180318A1 (zh)

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