WO2015039403A1 - 电容式内嵌触摸屏及显示装置 - Google Patents

电容式内嵌触摸屏及显示装置 Download PDF

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Publication number
WO2015039403A1
WO2015039403A1 PCT/CN2014/000542 CN2014000542W WO2015039403A1 WO 2015039403 A1 WO2015039403 A1 WO 2015039403A1 CN 2014000542 W CN2014000542 W CN 2014000542W WO 2015039403 A1 WO2015039403 A1 WO 2015039403A1
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WO
WIPO (PCT)
Prior art keywords
touch
touch sensing
sensing electrode
gate
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/000542
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English (en)
French (fr)
Inventor
魏向东
李付强
李成
郝学光
王学路
安星俊
柳奉烈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Ordos Yuansheng Optoelectronics Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US14/404,568 priority Critical patent/US9785276B2/en
Publication of WO2015039403A1 publication Critical patent/WO2015039403A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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
    • G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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 OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2203/04101—2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a capacitive in-cell touch panel and display device. Background technique
  • the composition of the touch screen it can be divided into: an on-touch touch panel, an on-cell touch panel (On Cell Touch Panel), and an in-cell touch panel (In Cell Touch Panel).
  • the in-cell touch panel is provided with the touch panel of the touch screen disposed inside the liquid crystal display panel, which can reduce the overall thickness of the module and greatly reduce the manufacturing cost of the touch screen.
  • the touch screen can be divided into: resistive touch screen and capacitive touch screen.
  • the capacitive touch screen supports multi-touch function, has high light transmittance and low overall power consumption, and has high contact surface hardness and long service life.
  • the existing capacitive in-cell touch panel is directly added to the existing array substrate by directly adding a touch scan line and a touch sense line, that is, two strips of mutually intersecting strips are formed on the surface of the array substrate.
  • the electrodes, the two electrodes are respectively used as a touch driving line and a touch sensing line of the touch screen, and mutual capacitance is formed at the intersection of the opposite faces of the two electrodes.
  • the working process is: when the touch driving signal is loaded on the electrode as the touch driving line, detecting the voltage signal that the touch sensing line is coupled through the mutual capacitance, in the process, when the human body touches the touch screen, the human body electric field is It will act on the mutual capacitance, and the capacitance value of the mutual capacitance will change, and then the voltage signal coupled by the touch sensing line will be changed. According to the change of the voltage signal, the contact position can be determined.
  • the touch scan line and the touch sensing line need to be added to the existing array substrate, the number of masks in the manufacturing process is increased, and the thickness of the touch screen is increased. Therefore, the production cost is increased. Moreover, the touch driving signals loaded on the newly added touch scan lines interfere with the original display signals in the array substrate, which affects the quality of the display screen and the accuracy of the touch.
  • an embodiment of the present invention provides a capacitive in-cell touch panel and a display device for reducing the number of masks in a manufacturing process, reducing the thickness of the touch screen, and avoiding mutual interference between the display signal and the touch driving signal. .
  • an embodiment of the present invention provides a capacitive in-cell touch panel including an array substrate having a data line, a gate line, and a thin film transistor; a gate of the thin film transistor is connected to the gate line, a source and the data Line connected
  • Adjacent at least two of the gate lines and a gate connected to the gate lines constitute a first touch sensing electrode
  • Adjacent at least two of the data lines and a source connected to the data line constitute a second touch sensing electrode
  • a touch driving signal is applied to each of the first touch sensing electrodes, and the second touch sensing electrode is coupled to the voltage signal of the touch driving signal and output; or
  • the touch sensing electrodes are loaded with the touch driving signals, and the first touch sensing electrodes are coupled to the voltage signals of the touch driving signals and output.
  • the source connected to the second touch sensing electrode does not need to add a new film layer on the existing array substrate, which can reduce the number of masks in the manufacturing process, reduce the thickness of the touch screen, and reduce the production cost.
  • the adjacent plurality of gate lines and the gate connected thereto are collectively used as a first touch sensing electrode, and the adjacent plurality of data lines and the source connected thereto serve together as a second touch sensing electrode
  • the touch sensitivity of the touch screen can be increased; and the time-division driving method is adopted in the touch and display time period, thereby avoiding mutual interference between the display signal and the touch driving signal, and ensuring the quality of the display screen and the touch control. Precision.
  • each of the first touch sensing electrodes includes the same number of gate lines; each of the second touch sensing electrodes includes the same number of data lines.
  • each of the first touch sensing electrodes includes a gate line and a number of data lines included in each of the second touch sensing electrodes.
  • At least one gate line between each of the first touch sensing electrodes and the at least one gate line constitute the first floating electrode; and/or,
  • At least one data line between each of the second touch sensing electrodes and a source connected to the at least one data line constitute a second floating electrode.
  • each of the first floating electrodes includes the same number of gate lines; each of the second floating electrodes includes the same number of data lines.
  • each of the first floating electrodes includes a gate line having the same number of data lines as each of the second floating electrodes.
  • the touch screen provided by the embodiment of the present invention further includes: a first touch switch corresponding to the first touch sensing electrode, and a second touch corresponding to the second touch sensing electrode Control switch, and touch drive circuit; wherein
  • the first touch sensing electrode is electrically connected to the touch driving circuit through a corresponding first touch switch, and the second touch sensing electrode passes through the corresponding second touch switch and the touch driving circuit. Electrically connected;
  • the touch driving circuit controls the first touch switch and the second touch switch to be in an open state, respectively, so that the touch driving circuit and the first touch sensing electrode are respectively And the second touch sensing electrode is in an on state.
  • the first touch switch and the second touch switch are located inside the touch driving circuit; or
  • the first touch switch is located at a connection between the first touch sensing electrode and the touch driving circuit
  • the second touch switch is located at the second touch sensing electrode and the touch driving circuit Connection.
  • the touch driving circuit is located inside the display driving circuit in the touch screen.
  • the embodiment of the invention further provides a display device comprising the above capacitive in-cell touch screen provided by the embodiment of the invention.
  • FIG. 1 is a schematic structural diagram of an array substrate in a touch screen according to an embodiment of the present invention
  • FIG. 2 is a timing diagram of a time division driving of a touch screen according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of the operation of the touch screen when the touch screen is touched according to an embodiment of the present invention
  • FIG. 3b is a schematic diagram of the working principle when the touch screen is touched according to an embodiment of the present invention
  • FIG. 4 is a second schematic structural diagram of an array substrate in a touch screen according to an embodiment of the present invention.
  • a capacitive in-cell touch panel provided by an embodiment of the present invention, as shown in FIG. 1, includes an array substrate having a data line 1, a gate line 2, and a thin film transistor 3; a gate 4 of the thin film transistor 3 is connected to the gate line 2, The source 5 is connected to the data line 1;
  • the adjacent at least two gate lines 2 and the gates 4 connected to the gate lines 2 constitute a first touch sensing electrode 6;
  • the adjacent at least two data lines 1 and the source 5 connected to the data line 1 constitute a second touch sensing electrode 7;
  • the touch sensing signal is applied to each of the first touch sensing electrodes 6 during the touch time period, and the second touch sensing electrode 7 is coupled to the voltage signal of the touch driving signal and output; or, for each second touch sensing electrode 7
  • the touch driving signal is loaded, and the first touch sensing electrode 6 couples the voltage signal of the touch driving signal and outputs the voltage signal.
  • first touch sensing electrode 6 composed of two adjacent gate lines 2 and a gate 4 connected to the gate line 2, and two adjacent data lines 1 and a source connected to the data line 1 5 constituting the second touch sensing electrode 7 is explained as an example.
  • At least two adjacent gate lines 2 on the shared array substrate and the gate electrode 4 connected thereto are used as the first touch sensing electrodes 6, and at least two adjacent to the array substrate are shared.
  • the data line 1 and the source 5 connected thereto serve as the second touch sensing electrode 7, and it is not necessary to add a new film layer on the existing array substrate, which can reduce the number of masks in the manufacturing process and reduce the touch screen.
  • the thickness of the device reduces the production cost; at the same time, the adjacent plurality of gate lines 2 and the gate 4 connected thereto are collectively used as a first touch sensing electrode 6, adjacent plurality of data lines 1 and a source connected thereto The poles 5 collectively function as a second touch sensing electrode 7, which can increase the touch sensitivity of the touch screen.
  • FIG. 2 is a timing diagram of the time-division driving of the touch screen provided by the embodiment of the present invention, and the time of displaying each frame of the touch screen can be divided into a display time period (LCD Time) and a touch time period (Touch).
  • Time the STV signal is the start signal of one frame of image.
  • the length of the display period and the length of the touch period may be allocated according to the resolution of different products, and is not specifically limited herein.
  • the touch sensing signal Tx is applied to each of the first touch sensing electrodes 6 during the touch time period, and the second touch sensing electrode 7 is coupled to the voltage signal Rx of the touch driving signal and output, or is sensed for each second touch.
  • the electrode 7 loads the touch driving signal Tx, and the first touch sensing electrode 6 couples the voltage signal Rx of the touch driving signal and outputs the touch function.
  • each of the gate lines Gatel, Gate2, ... Gate n+1 in the touch screen is sequentially loaded with a scan signal, and a gray-scale signal is loaded on the data line Data to realize a display function.
  • the capacitance existing between the first touch sensing electrode 6 and the second touch sensing electrode 7 is in a static equilibrium state; as shown in FIG. 3b, when the touch screen is fingered When touched, the finger generates a coupling capacitance with the first touch sensing electrode 6 and the second touch sensing electrode 7, respectively, such that the capacitance between the first touch sensing electrode 6 and the second touch sensing electrode 7 changes, according to the coupling.
  • the change of the output voltage signal can determine the position of the contact, thereby achieving multi-touch.
  • the number of gate lines 2 included in each first touch sensing electrode 6 may be set to be the same;
  • the number of data lines 1 included in each of the second touch sensing electrodes 7 is set to be the same.
  • the number of the data lines 1 included in each of the first touch sensing electrodes 6 and the second touch sensing electrodes ⁇ may be set to be the same, or the first touch sensing electrodes 6 may be included.
  • the number of the data lines 1 included in the gate lines 2 and the second touch sensing electrodes 7 is set to be different, which is not limited herein, and may be appropriately allocated according to the actual touch sensitivity of the touch screen.
  • a first floating electrode 8 may be disposed between each of the first touch sensing electrodes 6, and the first floating electrode 8 is At least one gate line adjacent to each of the first touch sensing electrodes 6 and a gate (not shown) connected to the at least one gate line; and/or, in order to avoid each of the second touch sensing electrodes A signal interference is generated, and a second floating electrode 9 may be disposed between each of the second touch sensing electrodes, the second floating electrode 9 being at least one data line adjacent to each of the second touch sensing electrodes 7 and A source (not shown) connected to the at least one data line.
  • the first floating electrode 8 and the second floating electrode 9 may both be grounded; during the display period, the display driving circuit respectively inputs the first floating electrode 8 and the second floating electrode 9 Into the scan signal and grayscale signal.
  • the number of the gate lines 2 included in each of the first floating electrodes 8 may be set to be the same, that is, each The spacing between the touch sensing electrodes 6 is the same; the number of data lines 1 included in each of the second floating electrodes 9 can be set to be the same, that is, the spacing between the second touch sensing electrodes 7 is the same.
  • the number of the data lines 1 included in each of the first floating electrodes 8 and the second floating electrodes 9 may be set to be the same, and/or the first touch sensing electrodes 6 may be The pitch is the same as the spacing between the second touch sensing electrodes 7; the number of the data lines 1 included in each of the first floating electrodes 8 and the second floating electrodes 9 may be different, that is, The spacing between the first touch sensing electrodes 6 and the spacing between the second touch sensing electrodes 7 are different, which is not limited herein, and may be appropriately allocated according to the actual touch precision of the touch screen.
  • the touch screen provided by the embodiment of the present invention further includes: a first touch switch 10 corresponding to the first touch sensing electrode 6 and a second touch sensing electrode 7
  • the first touch sensing electrode 6 is electrically connected to the touch driving circuit 12 through the corresponding first touch switch ⁇ , and the second touch sensing electrode 7 passes the corresponding first
  • the touch switch 11 is electrically connected to the touch driving circuit 12 .
  • the first touch switch 10 and the second touch switch 11 can be implemented by using a thin film transistor (TFT).
  • TFT thin film transistor
  • the peripheral lead 13 and the peripheral lead 14 may be added in the non-display area, and the gates of the thin film transistors of the first touch switch 10 are connected to the peripheral leads 13, the source and the touch driving circuit. 12 is connected, the drain is connected to the corresponding first touch sensing electrode 6; the gate of each thin film transistor as the second touch switch 11 is connected to the peripheral lead 14, the source is connected to the touch driving circuit 12, and the drain is connected Corresponding second touch sensing electrodes 7 are connected.
  • TFT thin film transistor
  • the touch driving circuit 12 provides control signals to the first touch switch 10 and the second touch switch 1 through the peripheral lead 13 and the peripheral lead 14, respectively, so that the first touch switch 10 and the second touch
  • the control switch 11 is in an on state, so that the touch driving circuit 12 is in an on state with the first touch sensing electrode 6 and the second touch sensing electrode 7, respectively.
  • the touch control circuit 12 turns off the control signals applied to the first touch switch 10 and the second touch switch 11 through the peripheral lead 13 and the peripheral lead 14 to make the first touch switch 10 and the second touch.
  • the switch 11 is in a closed state, and the connection of the touch driving circuit 12 with the first touch sensing electrode 6 and the second touch sensing electrode 7 is disconnected. Pass
  • the touch driving circuit 12 controls the switching states of the first touch switch 10 and the second touch switch 11 to ensure that the display signal and the touch driving signal do not interfere with each other.
  • the first touch switch 10 and the second touch switch 11 may be disposed inside the touch driving circuit 12; or, as shown in FIG. 4, the first touch switch 10 may be disposed at the first touch sense.
  • the second touch switch 11 is disposed at the junction of the second touch sensing electrode 7 and the touch driving circuit 12, which is not limited herein.
  • the touch driving circuit 12 can be disposed inside the display driving circuit in the touch screen, that is, the touch driving circuit 12 and the display driving circuit are integrated, which can further reduce the production cost.
  • an embodiment of the present invention further provides a display device, including the above-mentioned capacitive in-cell touch screen provided by the embodiment of the present invention, which may be: a mobile phone, a tablet computer, a television, a display, a notebook computer, Any product or component that has a display function such as a digital photo frame or a navigator.
  • a display device including the above-mentioned capacitive in-cell touch screen provided by the embodiment of the present invention, which may be: a mobile phone, a tablet computer, a television, a display, a notebook computer, Any product or component that has a display function such as a digital photo frame or a navigator.
  • the display device reference may be made to the above embodiment of the capacitive in-cell touch panel, and the repeated description is omitted.
  • the capacitive in-cell touch panel and the display device provided by the embodiment of the present invention, because at least two adjacent gate lines on the shared array substrate and the gate connected thereto are used as the first touch sensing electrodes, the phase on the shared array substrate is shared.
  • the adjacent at least two data lines and the source connected thereto serve as the second touch sensing electrodes, and it is not necessary to add a new film layer on the existing array substrate, thereby reducing the number of masks in the manufacturing process, and reducing The thickness of the small touch screen reduces the production cost; at the same time, the adjacent plurality of gate lines and the gate connected thereto serve together as a first touch sensing electrode, and the adjacent Donna data lines and the source connected thereto are common As a second touch sensing electrode, the touch sensitivity of the touch screen can be increased; and the time-division driving mode is adopted during the touch and display time period, thereby avoiding mutual interference between the display signal and the touch driving signal, and ensuring Display the quality of the shield and touch of the screen. It is out of the scope

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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Position Input By Displaying (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种电容式内嵌触摸屏及显示装置，由于共用阵列基板上相邻的至少两条栅线和与之相连的栅极作为第一触摸感测电极，共用阵列基板上相邻的至少两条数据线和与之相连的源极作为第二触摸感测电极，不需要在现有的阵列基板上另外增加新的膜层，这样可以减少制作工艺中的掩模次数，减小触摸屏的厚度，降低生产成本；并且，在触控和显示时间段采用分时驱动的方式，可以避免显示信号与触控驱动信号之间相互干扰，保证显示画面的品质和触控的精准度。

Description

电容式内嵌触摸屏及显示装置 技术领域
本发明涉及显示技术领域， 尤其涉及一种电容式内嵌触摸屏及显 示装置。 背景技术
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 ) 。 其中， 内嵌式触摸屏是将触摸屏的触控电 极设置在液晶显示屏的内部， 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。 触摸屏按照工作原理可以分为： 电阻式触摸 屏和电容式触摸屏等。 其中， 电容式触摸屏支持多点触控功能， 拥有 较高的透光率和较低的整体功耗， 其接触面硬度高， 使用寿命较长。
目前， 现有的电容式内嵌触摸屏是通过在现有的阵列基板上直接 另外增加触控扫描线和触控感应线实现的， 即在阵列基板的表面制作 两层相互异面相交的条状电极， 这两层电极分别作为触摸屏的触控驱 动线和触控感应线， 在两条电极的异面相交处形成互电容。 其工作过 程为： 在对作为触控驱动线的电极加载触控驱动信号时， 检测触控感 应线通过互电容耦合出的电压信号， 在此过程中， 当有人体接触触摸 屏时， 人体电场就会作用在互电容上， 吏互电容的电容值发生变化， 进而改变触控感应线耦合出的电压信号， 根据电压信号的变化， 就可 以确定触点位置。
在上述电容式内嵌触摸屏的结构设计中， 由于需要在现有的阵列 基板上新增触控扫描线和触控感应线， 这样会增多制作工艺中的掩模 次数， 增大触摸屏的厚度， 从而增加生产成本； 并且， 新增的触控扫 描线上加载的触控驱动信号会与阵列基板中原有的显示信号之间相互 干扰， 影响显示画面的品质和触控的精准度。
因此， 如何减少制作工艺中的掩模次数， 减小触摸屏的厚度， 并 避免触控驱动信号与显示信号之间相互干扰， 是本领域技术人员需要 解决的技术问题。 发明内容
有鉴于此， 本发明实施例提供一种电容式内嵌触摸屏及显示装置， 用以减少制作工艺中的掩模次数， 减小触摸屏的厚度， 并避免显示信 号与触控驱动信号之间相互干扰。
因此， 本发明实施例提供了一种电容式内嵌触摸屏， 包括具有数 据线、 栅线和薄膜晶体管的阵列基板； 所述薄膜晶体管的栅极与所述 栅线相连， 源极与所述数据线相连；
相邻的至少两条所述栅线和与所述栅线相连的栅极组成第一触摸 感测电极；
相邻的至少两条所述数据线和与所述数据线相连的源极组成第二 触摸感测电极；
在触控时间段， 对各所述第一触摸感测电极加载触控驱动信号， 所述第二触摸感测电极耦合所述触控驱动信号的电压信号并输出； 或， 对各所述第二触摸感测电极加载触控驱动信号， 所述第一触摸感测电 极耦合所述触控驱动信号的电压信号并输出。
本发明实施例提供的上述触摸屏， 由于共用阵列基板上相邻的至 少两条栅线和与之相连的栅极作为第一触摸感测电极， 共用阵列基板 上相邻的至少两条数据线和与之相连的源极作为第二触摸感测电极， 不需要在现有的阵列基板上另外增加新的膜层， 这样可以减少制作工 艺中的掩模次数， 减小触摸屏的厚度， 降低生产成本； 同时， 相邻的 多条栅线和与之相连的栅极共同作为一条第一触摸感测电极， 相邻的 多条数据线和与之相连的源极共同作为一条第二触摸感测电极， 这样 可以增大触摸屏的触控灵敏度； 并且， 在触控和显示时间段采用分时 驱动的方式， 可以避免显示信号与触控驱动信号之间相互干扰， 保证 显示画面的品质和触控的精准度。
较佳地， 为了保证触摸屏触控精度的一致性， 各所述第一触摸感 测电极包含的栅线数量相同； 各所述第二触摸感测电极包含的数据线 数量相同。
进一步地， 各所述第一触摸感测电极包含的栅线与各所述第二触 摸感测电极包含的数据线数量相同。
进一步地， 为了避免各第一触摸感测电极之间产生信号干扰， 各 所述第一触摸感测电极之间的至少一条栅线和与所述至少一条栅线相 连的栅极组成第一浮空电极； 和 /或，
为了避免各第二触摸感测电极之间产生信号干扰， 各所述第二触 摸感测电极之间的至少一条数据线和与所述至少一条数据线相连的源 极组成第二浮空电极。
较佳地， 为了保证触摸屏触控精度的一致性， 各所述第一浮空电 极包含的栅线数量相同； 各所述第二浮空电极包含的数据线数量相同。
进一步地， 各所述第一浮空电极包含的栅线与各所述第二浮空电 极包含的数据线数量相同。
进一步地， 本发明实施例提供的上述触摸屏， 还包括： 与所述第 一触摸感测电极——对应的第一触控开关， 与所述第二触摸感测电极 ——对应的第二触控开关， 以及触控驱动电路； 其中，
所述第一触摸感测电极通过对应的第一触控开关与所述触控驱动 电路电性相连， 所述第二触摸感测电极通过对应的第二触控开关与所 述触控驱动电路电性相连；
在触控时间段， 所述触控驱动电路分别控制所述第一触控开关和 所述第二触控开关处于开启状态， 使所述触控驱动电路分別与所述第 一触摸感测电极和所述第二触摸感测电极处于导通状态。
具体地， 所述第一触控开关和所述第二触控开关位于所述触控驱 动电路的内部； 或，
所述第一触控开关位于所述第一触摸感测电极与所述触控驱动电 路的连接处， 所述第二触控开关位于所述第二触摸感测电极与所述触 控驱动电路的连接处。
较佳地， 所述触控驱动电路位于所述触摸屏中的显示驱动电路的 内部。
本发明实施例还提供了一种显示装置， 包括本发明实施例提供的 上述电容式内嵌触摸屏。 附图说明
图 1为本发明实施例提供的触摸屏中阵列基板的结构示意图之一； 图 2为本发明实施例提供的触摸屏的分时驱动时序图；
图 3a为本发明实施例提供的触摸屏无触摸时的工作原理图； 图 3b为本发明实施例提供的触摸屏被触摸时的工作原理图； 图 4为本发明实施例提供的触摸屏中阵列基板的结构示意图之二。 具体实施方式
下面结合附图， 对本发明实施例提供的电容式内嵌触摸屏及显示 装置的具体实施方式进行详细地说明。
本发明实施例提供的一种电容式内嵌触摸屏， 如图 1 所示， 包括 具有数据线 1、栅线 2和薄膜晶体管 3的阵列基板； 薄膜晶体管 3的栅 极 4与栅线 2相连， 源极 5与数据线 1相连；
相邻的至少两条栅线 2和与栅线 2相连的栅极 4组成第一触摸感 测电极 6;
相邻的至少两条数据线 1和与数据线 1相连的源极 5组成第二触 摸感测电极 7;
在触控时间段， 对各第一触摸感测电极 6加载触控驱动信号， 第 二触摸感测电极 7耦合触控驱动信号的电压信号并输出； 或， 对各第 二触摸感测电极 7加载触控驱动信号， 第一触摸感测电极 6耦合触控 驱动信号的电压信号并输出。
图 1是以由相邻的两条栅线 2和与栅线 2相连的栅极 4组成第一 触摸感测电极 6, 由相邻的两条数据线 1和与数据线 1相连的源极 5组 成第二触摸感测电极 7为例进行说明的。
本发明实施例提供的上述触摸屏， 由于共用阵列基板上相邻的至 少两条栅线 2和与之相连的栅极 4作为第一触摸感测电极 6，共用阵列 基板上相邻的至少两条数据线 1和与之相连的源极 5作为第二触摸感 测电极 7， 不需要在现有的阵列基板上另外增加新的膜层， 这样可以减 少制作工艺中的掩模次数， 减小触摸屏的厚度， 降低生产成本； 同时， 相邻的多条栅线 2和与之相连的栅极 4共同作为一条第一触摸感测电 极 6,相邻的多条数据线 1和与之相连的源极 5共同作为一条第二触摸 感测电极 7, 这样可以增大触摸屏的触控灵敏度。
并且， 在本发明实施例提供的上述触摸屏中， 在触控和显示时间 段采用分时驱动的方式， 可以避免显示信号与触控驱动信号之间相互 干扰， 保证显示画面的品质和触控的精准度。 具体地， 图 2 示出了本 发明实施例提供的上述触摸屏的分时驱动时序图， 可以将触摸屏显示 每一帧的时间分成显示时间段 （LCD Time ) 和触控时间段 （Touch Time ) , STV信号是一帧图像的起始信号。 如图 2所示， 在显示一帧 的时间段内， 显示时间段和触控时间段的长度可以具体根据不同产品 的分辨率进行分配， 在此不做具体限定。 在触控时间段， 对各第一触 摸感测电极 6加载触控驱动信号 Tx, 第二触摸感测电极 7耦合触控驱 动信号的电压信号 Rx并输出， 或， 对各第二触摸感测电极 7加载触控 驱动信号 Tx, 第一触摸感测电极 6耦合触控驱动信号的电压信号 Rx 并输出， 实现触控功能。在显示时间段，对触摸屏中的每条栅线 Gatel , Gate2…… Gate n+1依次加载扫描信号， 对数据线 Data加载灰阶信号， 实现显示功能。
如图 3a所示， 在触摸屏被手指触摸前， 在第一触摸感测电极 6和 第二触摸感测电极 7之间存在的电容处于静态平衡状态；如图 3 b所示， 当触摸屏被手指触摸时， 手指分別与笫一触摸感测电极 6 和第二触摸 感测电极 7产生耦合电容， 使得第一触摸感测电极 6和第二触摸感测 电极 7之间的电容发生变化， 根据耦合输出的电压信号的变化就可以 确定触点位置， 从而实现多点触控。
较佳地， 在本发明实施例提供的电容式内嵌触摸屏中， 为了保证 触摸屏触控灵敏度的一致性， 可以将各第一触摸感测电极 6 包含的栅 线 2数量设置为相同； 可以将各第二触摸感测电极 7 包含的数据线 1 数量设置为相同。 进一步地， 可以将各第一触摸感测电极 6 包含的栅 线 2与各第二触摸感测电极 Ί包含的数据线 1数量设置为相同， 也可 以将各第一触摸感测电极 6包含的栅线 2与各第二触摸感测电极 7包 含的数据线 1 数量设置为不同， 在此不做限定， 具体可以根据触摸屏 实际的触控灵敏度进行合理的分配。
为了避免各第一触摸感测电极 6之间产生信号干扰， 如图 4所示， 可以在各第一触摸感测电极 6之间设置第一浮空电极 8 ,该第一浮空电 极 8由与各第一触摸感测电极 6相邻的至少一条栅线和与所述至少一 条栅线相连的栅极（未示出）组成； 和 /或， 为了避免各第二触摸感测 电极 Ί之间产生信号干扰， 可以在各第二触摸感测电极 Ί之间设置第 二浮空电极 9 ,该第二浮空电极 9由与各第二触摸感测电极 7相邻的至 少一条数据线和与所述至少一条数据线相连的源极（未示出） 组成。 在触控时间段， 第一浮空电极 8和第二浮空电极 9可以都接地； 在显 示时间段， 显示驱动电路对第一浮空电极 8和第二浮空电极 9分别输 入扫描信号和灰阶信号。
较佳地， 在本发明实施例提供的电容式内嵌触摸屏中， 为了保证 触摸屏触控精度的一致性， 可以将各第一浮空电极 8 包含的栅线 2数 量设置为相同， 即各第一触摸感测电极 6之间的间距相同； 可以将各 第二浮空电极 9包含的数据线 1数量设置为相同， 即各第二触摸感测 电极 7之间的间距相同。 进一步地， 可以将各第一浮空电极 8 包含的 栅线 2与各第二浮空电极 9包含的数据线 1数量设置为相同， 和 /或使 得各第一触摸感测电极 6之间的间距与各第二触摸感测电极 7之间的 间距相同； 也可以将各第一浮空电极 8 包含的栅线 2与各第二浮空电 极 9包含的数据线 1数量设置为不同， 即各第一触摸感测电极 6之间 的间距与各第二触摸感测电极 7之间的间距不同， 在此不做限定， 具 体可以根据触摸屏实际的触控精度进行合理的分配。
本发明实施例提供的上述触摸屏， 如图 4 所示， 还包括： 与第一 触摸感测电极 6—一对应的第一触控开关 10, 与第二触摸感测电极 7 ——对应的第二触控开关 11 , 以及触控驱动电路 12; 第一触摸感测电 极 6通过对应的第一触控开关 ίθ与触控驱动电路 12 电性相连, 第二 触摸感测电极 7通过对应的第二触控开关 11与触控驱动电路 12电性 相连。
在具体实施时， 第一触控开关 10和第二触控开关 11 可以采用薄 膜晶体管（TFT ) 实现。 具体地， 如图 4所示， 可以在非显示区域增加 外围引线 13和外围引线 14, 作为第一触控开关 10的各薄膜晶体管的 栅极与外围引线 13相连， 源极与触控驱动电路 12相连， 漏极与对应 的第一触摸感测电极 6相连； 作为第二触控开关 11的各薄膜晶体管的 栅极与外围引线 14相连， 源极与触控驱动电路 12相连， 漏极与对应 的第二触摸感测电极 7相连。 在触控时间段， 触控驱动电路 12通过外 围引线 13和外围引线 14分别对第一触控开关 10和第二触控开关 1 1 提供控制信号， 使第一触控开关 10和第二触控开关 11处于开启状态， 使得触控驱动电路 12分别与第一触摸感测电极 6和第二触摸感测电极 7处于导通状态。 在显示时间段， 触控驱动电路 12通过外围引线 13和 外围引线 14向第一触控开关 10和第二触控开关 11加载的控制信号关 闭， 使第一触控开关 10和第二触控开关 11处于关闭状态， 断开触控 驱动电路 12与第一触摸感测电极 6和第二触摸感测电极 7的连接。 通 过触控驱动电路 12控制第一触控开关 10和第二触控开关 11的开关状 态， 保证了显示信号与触控驱动信号之间不会相互干扰。
具体地， 可以将第一触控开关 10和第二触控开关 11设置在触控 驱动电路 12的内部； 或， 如图 4所示， 可以将第一触控开关 10设置 在第一触摸感测电极 6与触控驱动电路 12的连接处， 将第二触控开关 11设置在第二触摸感测电极 7与触控驱动电路 12的连接处，在此不做 限定。
较佳地， 可以将触控驱动电路 12设置在触摸屏中的显示驱动电路 的内部， 即将触控驱动电路 12和显示驱动电路整合为一体， 这样可以 进一步地降低生产成本。
基于同一发明构思， 本发明实施例还提供了一种显示装置， 包括 本发明实施例提供的上述电容式内嵌触摸屏， 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电 容式内嵌触摸屏的实施例， 重复之处不再赘述。
本发明实施例提供的一种电容式内嵌触摸屏及显示装置， 由于共 用阵列基板上相邻的至少两条栅线和与之相连的栅极作为第一触摸感 测电极， 共用阵列基板上相邻的至少两条数据线和与之相连的源极作 为第二触摸感测电极， 不需要在现有的阵列基板上另外增加新的膜层， 这样可以减少制作工艺中的掩模次数， 减小触摸屏的厚度， 降低生产 成本； 同时， 相邻的多条栅线和与之相连的栅极共同作为一条第一触 摸感测电极， 相邻的多奈数据线和与之相连的源极共同作为一条第二 触摸感测电极， 这样可以增大触摸屏的触控灵敏度； 并且， 在触控和 显示时间段采用分时驱动的方式， 可以避免显示信号与触控驱动信号 之间相互干扰， 保证显示画面的品盾和触控的精准度。 脱离本发明的精 和范围。 倘若本发明的这些修改和变型属 本发明权利要求及其等同技术的范围之内， 则本发明也意图包含这些 改动和变型在内。

Claims

权 利 要 求
1. 一种电容式内嵌触摸屏， 包括具有数据线、 栅线和薄膜晶体管 的阵列基板； 所述薄膜晶体管的栅极与所述栅线相连， 源极与所述数 据线相连， 其特征在于：
相邻的至少两条所述栅线和与所述栅线相连的栅极组成第一触摸 感测电极；
相邻的至少两条所述数据线和与所述数据线相连的源极组成第二 触摸感测电极；
在触控时间段， 对各所述第一触摸感测电极加载触控驱动信号， 所述第二触摸感测电极耦合所述触控驱动信号的电压信号并输出； 或， 对各所述第二触摸感测电极加载触控驱动信号， 所述第一触摸感测电 极耦合所述触控驱动信号的电压信号并输出。
2. 如权利要求 1所述的触摸屏， 其特征在于， 各所述第一触摸感 测电极包含的栅线数量相同； 各所述第二触摸感测电极包含的数据线 数量相同。
3. 如权利要求 2所述的触摸屏， 其特征在于， 各所述第一触摸感 测电极包含的栅线与各所述第二触摸感测电极包含的数据线数量相 同。
4. 如权利要求 1所述的触摸屏， 其特征在于， 各所述第一触摸感 测电极之间的至少一条栅线和与所述至少一条栅线相连的栅极组成第 一浮空电极； 和 /或，
各所述第二触摸感测电极之间的至少一条数据线和与所述至少一 奈数据线相连的源极组成第二浮空电极。
5. 如权利要求 4所述的触摸屏， 其特征在于， 各所述第一浮空电 极包含的栅线数量相同； 各所述第二浮空电极包含的数据线数量相同。
6. 如权利要求 5所述的触摸屏， 其特征在于， 各所述第一浮空电 极包含的栅线与各所述第二浮空电极包含的数据线数量相同。
7. 如权利要求 1所述的触摸屏， 其特征在于， 还包括： 与所述第 一触摸感测电极——对应的第一触控开关， 与所述第二触摸感测电极
——对应的第二触控开关， 以及触控驱动电路； 其中，
所述第一触摸感测电极通过对应的第一触控开关与所述触控驱动 电路电性相连， 所述第二触摸感测电极通过对应的第二触控开关与所 述触控驱动电路电性相连；
在触控时间段， 所述触控驱动电路分别控制所述第一触控开关和 所述第二触控开关处于开启状态， 使所述触控驱动电路分别与所述第 一触摸感测电极和所述第二触摸感测电极处于导通状态。
8. 如权利要求 7所述的触摸屏， 其特征在于， 所述第一触控开关 和所述第二触控开关位于所述触控驱动电路的内部； 或，
所述第一触控开关位于所述第一触摸感测电极与所述触控驱动电 路的连接处， 所述第二触控开关位于所述第二触摸感测电极与所述触 控驱动电路的连接处。
9. 如权利要求 7所述的触摸屏， 其特征在于， 所述触控驱动电路 位于所述触摸屏中的显示驱动电路的内部。
10. —种显示装置， 其特征在于， 包括如权利要求 1-9任一项所述 的电容式内嵌触摸屏。
PCT/CN2014/000542 2013-09-23 2014-05-29 电容式内嵌触摸屏及显示装置 Ceased WO2015039403A1 (zh)

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