WO2014000364A1 - 电容式内嵌触摸屏及其触摸定位方法和显示装置 - Google Patents

电容式内嵌触摸屏及其触摸定位方法和显示装置 Download PDF

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Publication number
WO2014000364A1
WO2014000364A1 PCT/CN2012/084328 CN2012084328W WO2014000364A1 WO 2014000364 A1 WO2014000364 A1 WO 2014000364A1 CN 2012084328 W CN2012084328 W CN 2012084328W WO 2014000364 A1 WO2014000364 A1 WO 2014000364A1
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Prior art keywords
touch
line
sensing
lines
sensing line
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PCT/CN2012/084328
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English (en)
French (fr)
Inventor
赵家阳
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京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to KR1020137012241A priority Critical patent/KR101418694B1/ko
Priority to JP2015518782A priority patent/JP6130501B2/ja
Priority to EP12842679.8A priority patent/EP2701043B1/en
Priority to US13/991,364 priority patent/US9436323B2/en
Publication of WO2014000364A1 publication Critical patent/WO2014000364A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • 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
    • G06F3/0446—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
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133334—Electromagnetic shields
    • 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
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds

Definitions

  • the invention relates to a capacitive in-cell touch screen, a touch positioning method thereof and a display device. Background technique
  • the Touch Screen Panel With the rapid development of display technology, the Touch Screen Panel has gradually spread throughout people's lives.
  • the touch screen can be divided into: resistive, capacitive, infrared, and surface acoustic wave according to the working principle.
  • capacitive touch screen is favored by the industry as its new favorite with its unique touch principle and high sensitivity, long life and high light transmittance.
  • a capacitive in-cell touch panel is realized by directly adding a touch scan line and a touch sensing line on a TFT (Thin Film Transistor) array substrate, that is, Two layers of IOT (Indi Tin Tin Oxides, Indium Tin Oxides) electrodes are formed on the surface of the TFT array substrate, and the two layers of IT0 electrodes are respectively used as touch scan lines and touch sensing lines of the touch screen. The intersection of the opposite faces of the two IT0 electrodes forms an induced capacitance.
  • IOT Indi Tin Tin Oxides, Indium Tin Oxides
  • the working process of the embedded touch screen is: when loading the touch scan signal on the IT0 electrode as the touch scan line, detecting the voltage signal that the touch sense line is coupled through the sensing capacitor, in the process, when the human body touches the touch screen
  • the human body electric field acts on the sensing capacitor to change the capacitance value of the sensing capacitor, thereby changing the voltage signal coupled by the touch sensing line, and the position of the contact can be determined according to the change of the voltage signal.
  • the aperture ratio is a ratio between the area of the light passing portion after removing the wiring portion and the transistor portion (usually hidden by the black matrix) of each pixel and the area of each pixel as a whole.
  • the capacitive in-cell touch panel requires an additional touch scan line, a touch sense line, and a drive circuit on the TFT array substrate, thereby reducing the aperture ratio of the TFT substrate and affecting the light transmittance of the TFT array substrate.
  • the two layers of the IT0 electrodes added in the capacitive in-cell touch panel overlap with the original data lines and the gate lines in the TFT array substrate. Therefore, when the IT0 electrode transmits the touch scan signal, The original display driving signal in the TFT array substrate generates severe signal interference, which may cause the TFT array substrate to fail to work normally.
  • Embodiments of the present invention provide a capacitive in-cell touch panel, a touch positioning method thereof, and a display device for improving an aperture ratio of an existing capacitive in-cell touch panel.
  • a capacitive in-cell touch panel includes: a TFT array substrate having a data line and a gate line; at least one of the gate lines is configured as a touch scan line, and at least one of the data lines is set to be touch Or at least one of the data lines is configured as a touch scan line, and at least one of the gate lines is configured as a touch sensing line; wherein the touch scan line is used to transmit a touch scan signal;
  • the touch sensing line is configured to couple and output a voltage signal of the touch scan signal through a sensing capacitor; the sensing capacitor is formed at a intersection of the touch scan line and the opposite surface of the touch sensing line.
  • Embodiments of the present invention also provide a display device including a capacitive in-cell touch screen in accordance with an embodiment of the present invention.
  • the embodiment of the present invention also provides a touch positioning method for a capacitive in-cell touch screen according to an embodiment of the present invention, including: loading a touch scan signal on a touch scan line disposed in the touch screen; detecting touch The sensing line couples the voltage signal of the touch scan signal through the sensing capacitor; and determines the contact position of the touch screen according to the detected change of the voltage signal and the position of the sensing capacitor.
  • FIG. 1 is a schematic structural view of a capacitive in-cell touch panel according to an embodiment of the invention.
  • FIG. 2 is a schematic exploded view of a capacitive in-cell touch panel according to an embodiment of the invention
  • FIG. 3 is a schematic diagram of a circuit structure of a capacitive in-cell touch panel according to an embodiment of the invention
  • Driving timing diagram of the embedded touch screen
  • FIG. 5 is a flow chart of a touch positioning method of a capacitive in-cell touch screen according to an embodiment of the invention.
  • a capacitive in-cell touch panel includes: a TFT array substrate having a data line and a gate line; at least one gate line is set as a touch scan line, and at least one data line is set as The touch sensing line; or, at least one data line is set as a touch scan line, and at least one gate line is set as a touch sensing line; wherein, the touch scan line is used to transmit the touch scan signal; The voltage signal of the touch scan signal is coupled through the sensing capacitor and the voltage signal is output; the sensing capacitor is formed at a intersection of the touch scan line and the touch sensor line.
  • the capacitive in-cell touch panel according to the embodiment of the present invention may further include: a color filter substrate disposed on the TFT array substrate and having the same size as the TFT array substrate; the color film substrate facing away from the TFT array One side of the substrate has a metal layer for shielding an electric field; the distribution area of the metal layer is a region other than the corresponding region of the sensing capacitance, that is, there is no pattern in the region corresponding to the sensing capacitance of the metal layer, and the unpatterned region is a dotted line as shown in FIG. The box is shown.
  • the material of the metal layer may be IT0, and the metal layer may shield the interference of the external electric field.
  • the metal layer has no pattern corresponding to the formed sensing capacitance (ie, Open the skylight), the human body electric field can be applied to the sensing capacitor through the skylight, and the voltage of the combined sensing capacitor changes to determine whether there is a contact.
  • the touch precision of the touch screen is usually on the order of millimeters, and the display precision of the TFT array substrate is usually on the order of micrometers. Therefore, the touch scan lines and the touch sense lines required for the touch screen display the required drive lines than the TFT array substrate.
  • a part of the driving lines (data lines and gate lines) in the TFT array substrate can be used as a touch line (touch scanning line and touch sensing line) of the touch screen, and an induction is formed at the intersection of the different lines of the data line and the gate line. Capacitor to achieve the function of a capacitive touch screen.
  • the spacing between the touch scan lines is generally set to be the same, and each touch sensing line is The spacing between them is set to be the same.
  • the spacing between the touch scan lines and the distance between the touch sensing lines can be set to be the same to unify the touch precision of the touch screen.
  • a part of the data lines in the TFT array substrate can be used as the touch scan lines, and correspondingly, the gate lines intersecting the different surfaces thereof can be used as the touch sensing lines;
  • the scanning line is controlled, and correspondingly, the data line intersecting the different surface thereof is used as the touch sensing line.
  • a gate line is used as a touch scan line, and a corresponding data line is used as a touch line.
  • the capacitive in-cell touch panel further includes: a touch receiver connected to the set touch sensing line for receiving a voltage signal output by the touch sensing line.
  • the touch receiver may be integrated inside the IC chip of the driving data line of the TFT array substrate, or may be separately provided.
  • the capacitive in-cell touch screen further includes: a touch switch disposed between each touch sensing line and the touch receiver, and a pair of touch scan signals transmitted on the touch scan line After the pixel discharge is completed, the connection between the touch sensing line and the touch receiver is turned on. When the touch scan signal transmitted by the touch scan line charges the pixel, the connection between the touch sensing line and the touch receiver is closed.
  • the touch switch can be disposed inside the touch receiver or at the connection between the touch sensor and the touch receiver.
  • the number of touch switches should be the same as the number of touch sensing lines that are set.
  • a touch switch can be a TFT.
  • the capacitive in-cell touch screen according to the embodiment of the present invention further includes: a display driver connected to the touch sensing line, and a driving switch disposed between each touch sensing line and the display driver; the display driver is configured to Loading a display driving signal for the touch sensing line; the driving switch is configured to close the connection between the touch sensing line and the display driver after the touch scanning signal transmitted by the touch scanning line ends the discharge of the pixel; When the touch scan signal charges the pixel, the touch sensing line is connected to the display driver.
  • the drive switch may be disposed inside the display driver or at the junction of the touch sensing line and the display driver.
  • the number of drive switches should be the same as the number of touch sense lines set.
  • a drive switch can be a TFT.
  • the time-division driving method can be used to drive the touch and LCD display to eliminate signal interference between the two.
  • FIG. 3 is a schematic diagram showing the circuit structure of a capacitive in-cell touch panel according to an embodiment of the invention.
  • every two data lines are set as touch sensing lines, that is, the first, fourth, and seventh data lines are set as touch sensing lines.
  • Each of the touch sensing lines is connected to the touch receiver and the display driver through a touch switch and a display switch.
  • the gate line of every N rows is set as the touch scan line, that is, the second line, and the gate line of the N+2 line is the touch scan line.
  • the driving circuit of the gate line and the touch scan line may use an existing gate line driving circuit, which may be, for example, a GOA (Ga te Dr iver on Array), COF (Chip on Flexible Pr inted Ci rcui t, external flexible drive circuit) or COG (Chip on Glas s, external integrated circuit).
  • GOA Ga te Dr iver on Array
  • COF Chip on Flexible Pr inted Ci rcui t, external flexible drive circuit
  • COG Chip on Glas s, external integrated circuit
  • the driving timing diagram of the embodiment shown in FIG. 3 is as shown in FIG. 4.
  • the touch switch corresponding to each touch sensing line is turned off, and the display switch is turned on.
  • the display signal is loaded by the display driver, that is, each touch sensing line charges the pixels of the first row.
  • the first pulse is reset, and the function is to discharge the power of the row of pixels to ensure that the row gate line is in the touch scan.
  • the voltage of the corresponding touch sensing line is the same, avoiding the problem caused by the voltage difference of each data line as the touch sensing line when the screen is displayed; after the discharge is finished, the second row gate line G2 starts to touch. Scanning, at this time, the touch switch corresponding to each touch sensing line is turned on, the display switch is turned off, and the touch scanning signal loaded by the second row gate line G2 is coupled through the sensing capacitor, and is sensed by each touch. The line is transmitted to the touch receiver.
  • the capacitance value of the sensing capacitor changes, resulting in a different voltage signal on the touch sensing line; the touch applied on the second line G2
  • the pixels of the row are charged.
  • the touch switch corresponding to each touch sensing line is turned off, and the display switch is turned on, that is, each touch sensing line is placed on the display driver, so that the row of pixels It will not be mischarged during touch scanning, resulting in abnormal display.
  • the normal display driving signal is applied to the third row of gate lines until the scanning of the touch sensing line is repeated when the scanning starts with the N+2th gate line (Gn+2) as the touch scanning line.
  • Embodiments of the present invention also provide a display device including a capacitive in-cell touch screen in accordance with an embodiment of the present invention.
  • the present disclosure also provides a touch positioning method based on a capacitive in-cell touch screen according to an embodiment of the present invention.
  • the method for solving the problem is similar to the foregoing capacitive in-cell touch screen. Therefore, the implementation of the method can be referred to the foregoing capacitive type.
  • the working principle of the embedded touch screen is similar to the foregoing capacitive in-cell touch screen.
  • the touch positioning method is as shown in FIG. 5.
  • the touch scan signal is loaded on the touch scan line disposed in the touch screen;
  • the touch sensing line is detected.
  • the sensing capacitor is coupled to the voltage signal of the touch scan signal, and the sensing capacitor is formed at the intersection of the touch scan line and the touch sensor line.
  • the capacitance value of the sensing capacitor A change occurs; in step S503, the contact position of the touch screen is determined based on the detected change in the voltage signal and the position of the sensing capacitance.
  • the capacitive in-cell touch panel and the touch positioning method and the display device thereof are provided, wherein at least one gate line in the TFT array substrate is used as a touch scan line, and at least one data line is set as a touch sensing line; or On the contrary, at least one data line in the TFT array substrate is used as a touch scan line, and at least one gate line is set as a touch sensing line to realize the function of the touch screen.
  • the gate lines and the data lines in the existing TFT array substrate are used as the touch scan lines and the touch sensing lines, no additional wiring is required compared with the embedded touch screen in the prior art, and therefore, the TFT is not lowered.
  • the aperture ratio of the array substrate is not lowered.

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  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Position Input By Displaying (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)

Abstract

本发明公开了一种电容式内嵌触摸屏及其触摸定位方法和显示装置。其中，将 TFT 阵列基板中的至少一条栅线作为触控扫描线，将至少一条数据线设置为触控感应线；或，反之，将 TFT 阵列基板中的至少一条数据线作为触控扫描线，将至少一条栅线设置为触控感应线，从而实现触摸屏的功能。由于利用 TFT 阵列基板中的栅线和数据线作为触控扫描线和触控感应线，不需要增加额外的布线，因此，不会降低 TFT 阵列基板的开口率。

Description

电容式内嵌触摸屏及其触摸定位方法和显示装置 技术领域
本发明涉及一种电容式内嵌触摸屏及其触摸定位方法和显示装置。 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， 触摸屏按照工作原理可以分为： 电阻式、 电容式、 红外线式以及表面声波式。 其中， 电容式触摸屏以其独特的触控原理， 凭借 高灵敏度、 长寿命、 高透光率等优点， 被业内追捧为新宠。
目前，电容式内嵌（ in cel l )触摸屏是通过在 TFT( Thin Fi lm Trans i s tor, 薄膜场效应晶体管） 阵列基板上直接另外增加触控扫描线和触控感应线来实 现的，即在 TFT阵列基板的表面制作两层相互异面相交的条状 IT0( Indi丽 Tin Oxides , 铟锡金属氧化物） 电极， 这两层 IT0 电极分别作为触摸屏的触控扫 描线和触控感应线， 在两条 IT0 电极的异面相交处形成感应电容。 该内嵌触 摸屏的工作过程为： 在对作为触控扫描线的 IT0 电极加载触控扫描信号时， 检测触控感应线通过感应电容耦合出的电压信号， 在此过程中， 当人体接触 触摸屏时， 人体电场就会作用在感应电容上， 使感应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。
开口率是指除去每一个像素的配线部、 晶体管部 （通常釆用黑色矩阵隐 藏）后的光线通过部分的面积与每一个像素整体的面积之间的比例。 开口率 越高， 光线通过的效率越高。 上述电容式内嵌触摸屏， 由于需要在 TFT阵列 基板上增加额外的触控扫描线和触控感应线以及驱动电路， 因此会降低 TFT 基板的开口率， 进而影响 TFT阵列基板的透光性。
并且， 上述电容式内嵌触摸屏中增加的两层 IT0电极会与 TFT阵列基板 中原有的数据线和栅线在垂直方向上发生交叠， 因此， IT0 电极在传输触控 扫描信号时,会对 TFT阵列基板中原有的显示驱动信号产生严重的信号干扰， 有可能导致 TFT阵列基板不能正常工作。 发明内容
本发明实施例提供了一种电容式内嵌触摸屏及其触摸定位方法和显示装 置， 用以提高现有的电容式内嵌触摸屏的开口率。
根据本发明实施例的电容式内嵌触摸屏， 包括： 具有数据线和栅线的 TFT 阵列基板； 至少一条所述栅线被设置为触控扫描线， 至少一条所述数据线被 设置为触控感应线； 或者， 至少一条所述数据线被设置为触控扫描线， 至少 一条所述栅线被设置为触控感应线； 其中， 所述触控扫描线用于传递触控扫 描信号； 所述触控感应线用于通过感应电容， 耦合所述触控扫描信号的电压 信号并输出； 所述感应电容形成于所述触控扫描线与所述触控感应线的异面 相交处。
本发明实施例还提供了一种显示装置， 其包括根据本发明实施例的电容 式内嵌触摸屏。
此外， 本发明实施例也提供了一种基于本发明实施例的电容式内嵌触摸 屏的触摸定位方法， 包括： 对在所述触摸屏中设置的触控扫描线加载触控扫 描信号； 检测触控感应线通过感应电容耦合出的所述触控扫描信号的电压信 号； 根据检测出的所述电压信号的变化以及所述感应电容的位置， 确定所述 触摸屏的触点位置。 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为根据本发明实施例的电容式内嵌触摸屏的结构示意图；
图 2为才艮据本发明实施例的电容式内嵌触摸屏的结构分解示意图； 图 3为根据本发明实施例的电容式内嵌触摸屏的电路结构示意图； 图 4为图 3所示的电容式内嵌触摸屏的驱动时序图；
图 5为根据本发明实施例的电容式内嵌触摸屏的触摸定位方法的流程图。 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。
除非另作定义， 此处使用的技术术语或者科学术语应当为本发明所属领 域内具有一般技能的人士所理解的通常意义。 本发明专利申请说明书以及权 利要求书中使用的 "第一"、 "第二" 以及类似的词语并不表示任何顺序、 数 量或者重要性， 而只是用来区分不同的组成部分。 同样， "一个" 或者 "一" 等类似词语也不表示数量限制， 而是表示存在至少一个。
下面结合附图， 对根据本发明实施例的电容式内嵌触摸屏及其触摸定位 方法和显示装置的具体实施方式进行详细地说明。
附图中各层薄膜厚度和区域大小形状不反映阵列基板或彩膜基板的真实 比例， 目的只是示意性地说明本发明的技术内容。
根据本发明实施例的电容式内嵌触摸屏， 如图 1 所示， 包括： 具有数据 线和栅线的 TFT阵列基板； 至少一条栅线被设置为触控扫描线， 至少一条数 据线被设置为触控感应线； 或者， 至少一条数据线被设置为触控扫描线， 至 少一条栅线皮设置为触控感应线； 其中， 触控扫描线用于传递触控扫描信号； 触控感应线用于通过感应电容来耦合触控扫描信号的电压信号并输出该电压 信号； 该感应电容形成于触控扫描线与触控感应线的异面相交处。
根据本发明实施例的电容式内嵌触摸屏， 如图 1 所示， 还可以包括： 设 置于 TFT阵列基板上方、 且与 TFT阵列基板大小相同的的彩膜基板； 该彩膜 基板背向 TFT阵列基板的一面具有用于屏蔽电场的金属层； 该金属层的分布 区域为除感应电容对应区域之外的区域， 即在金属层对应感应电容的区域无 图案， 无图案的区域如图 1中虚线框所示。
在具体实施时， 例如， 该金属层的材料可以为 IT0 , 金属层可以屏蔽外界 电场的干扰， 如图 2 的结构分解示意图所示， 在金属层与形成的感应电容对 应的区域无图案（即开天窗）， 人体电场可以通过天窗作用到感应电容上， 这 合的感应电容的电压变化来确定是否存在触点。 触摸屏的触控精度通常在毫米级， 而 TFT阵列基板的显示精度通常在微 米级， 由此， 触控屏所需的触控扫描线和触控感应线比 TFT阵列基板显示所 需的驱动线（数据线和栅线）要少的多， 并且， TFT阵列基板中每个 TFT对应 的数据线和栅线都异面相交， 即两条线相互绝缘且在垂直方向上的投影相交， 因此， 可以将 TFT阵列基板中的一部分驱动线（数据线和栅线）作为触摸屏 的触控线（触控扫描线和触控感应线）， 并且， 在数据线和栅线的异面相交处 形成感应电容， 以实现电容式触摸屏的功能。
例如， 在根据本发明实施例的电容式内嵌触摸屏中， 在设定触控扫描线 和触控感应线时， 一般将各触控扫描线之间的间距设置为相同， 各触控感应 线之间的间距设置为相同。
还例如， 可以将各触控扫描线之间的间距与各触控感应线之间的间距设 置为相同， 以统一触摸屏的触控精度。
根据不同的实施方式， 可以将 TFT阵列基板中部分数据线作为触控扫描 线， 对应地， 将与其异面相交的栅线作为触控感应线； 也可以将 TFT阵列基 板中部分栅线作为触控扫描线， 对应地， 将与其异面相交的数据线作为触控 感应线。
在以下对本发明公开的技术的描述中， 以将栅线作为触控扫描线， 对应 的数据线作为触控感应线为例进行说明。
例如， 根据本发明实施例的电容式内嵌触摸屏， 还包括： 与设置的触控 感应线连接的触控接收器， 用于接收触控感应线输出的电压信号。
根据不同的实施方式， 该触控接收器可以集成在 TFT阵列基板的驱动数 据线的 IC芯片内部， 也可以单独设置。
根据本发明实施例的电容式内嵌触摸屏， 例如， 还包括： 设置在各触控 感应线与触控接收器之间的触控开关， 用于在触控扫描线传递的触控扫描信 号对像素放电结束后， 开启触控感应线与触控接收器的连接； 在触控扫描线 传递的触控扫描信号对像素充电时， 关闭触控感应线与触控接收器的连接。
例如， 触控开关可以设置在触控接收器的内部， 也可以设置在触控感应 线与触控接收器的连接处。
在具体实施时， 触控开关的数量应该和设置的触控感应线的数量一致。 一个触控开关可以是一个 TFT。 根据本发明实施例的电容式内嵌触摸屏， 例如， 还包括： 与触控感应线 连接的显示驱动器， 以及设置在各触控感应线与显示驱动器之间的驱动开关； 该显示驱动器， 用于对触控感应线加载显示驱动信号； 该驱动开关， 用于在 触控扫描线传递的触控扫描信号对像素放电结束后， 关闭触控感应线与显示 驱动器的连接； 在触控扫描线传递的触控扫描信号对像素充电时， 开启触控 感应线与显示驱动器的连接。
根据实施方式的不同， 驱动开关可以设置在显示驱动器的内部， 也可以 设置在触控感应线与显示驱动器的连接处。
在实施时， 驱动开关的数量应该与设置的触控感应线的数量一致， 一个 驱动开关可以是一个 TFT。
对触控扫描线加载信号时， 可以釆用分时驱动方式来驱动触控和 LCD显 示， 以消除两者之间的信号干扰。
图 3是根据本发明实施例的电容式内嵌触摸屏的电路结构示意图。如图 3 所示， 将每隔两条数据线设置为触控感应线， 即将第 1条、 第 4条和第 7条 数据线设置为触控感应线。 其中， 每条触控感应线分别通过触控开关和显示 开关与触控接收器和显示驱动器连接。 将每隔 N行的栅线设置为触控扫描线， 即第 2行， 第 N+2行的栅线为触控扫描线。
在一种实施方式中， 栅线和触控扫描线的驱动电路可以使用现有的栅线 驱动电路， 该驱动电路例如可以是 GOA ( Ga te Dr iver on Array, 阵列基板行 驱动电路）， COF ( Chip on Flexible Pr inted Ci rcui t , 外接柔性驱动电路） 或 COG ( Chip on Glas s , 外接集成电路）。
图 3所示实施例的驱动时序图如图 4所示， 首先， 在第一行栅线 G1加载 的信号为高时， 每条触控感应线对应的触控开关断开， 显示开关开启， 通过 显示驱动器加载显示信号， 即每条触控感应线对第一行的像素进行充电。
然后， 在作为触控扫描线的第二行栅线 G2开始扫描时， 第一个脉冲为复 位， 其作用是对该行像素的电量进行放电， 以保证该行栅线在进行触控扫描 时， 对应的触控感应线的电压相同， 避免由于在显示画面时作为触控感应线 的各数据线的电压不同而带来的问题； 在放电结束后， 第二行栅线 G2开始进 行触控扫描， 此时， 每条触控感应线对应的触控开关开启， 显示开关断开， 第二行栅线 G2加载的触控扫描信号经过感应电容的耦合， 通过每条触控感应 线传输到触控接收器中， 在此过程中如果有手指碰触， 感应电容的电容值会 发生变化， 导致触控感应线上的电压信号不同； 在第二行栅线 G2加载的触控 扫描信号的最后， 对该行像素进行充电， 此时每条触控感应线对应的触控开 关断开， 显示开关开启， 即每条触控感应线置于显示驱动器上， 这样， 该行 像素就不会在进行触控扫描时发生误充电， 导致显示画面异常。
最后， 对第三行栅线加载正常的显示驱动信号， 直至到作为触控扫描线 的第 N+2行栅线（Gn+2 )开始扫描时， 重复前述触控感应线执行的操作。
本发明实施例还提供了一种显示装置， 其包括根据本发明实施例的电容 式内嵌触摸屏。
本公开还提供了一种基于根据本发明实施例的电容式内嵌触摸屏的触摸 定位方法， 该方法解决问题的原理与前述电容式内嵌触摸屏相似， 因此该方 法的实施可以参见前述电容式内嵌触摸屏的工作原理。
在一种实施方式中，所述触摸定位方法，如图 5所示，例如， 在步骤 S501 , 对触摸屏中设置的触控扫描线加载触控扫描信号； 在步骤 S502 , 检测触控感 应线通过感应电容耦合出的触控扫描信号的电压信号， 该感应电容形成于触 控扫描线与触控感应线的异面相交处， 当与感应电容对应的区域存在触控时， 感应电容的电容值发生变化； 在步骤 S503 , 根据检测出的电压信号的变化以 及感应电容的位置， 确定触摸屏的触点位置。
本发明实施例提供的电容式内嵌触摸屏及其触摸定位方法和显示装置， 将 TFT阵列基板中的至少一条栅线作为触控扫描线， 将至少一条数据线设置 为触控感应线； 或， 反之， 将 TFT阵列基板中的至少一条数据线作为触控扫 描线， 将至少一条栅线设置为触控感应线， 实现触摸屏的功能。
由于利用现有的 TFT阵列基板中的栅线和数据线作为触控扫描线和触控 感应线， 相对于现有技术中的内嵌式触摸屏不需要增加额外的布线， 因此， 不会降低 TFT阵列基板的开口率。
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。

Claims

权利要求书
1、 一种电容式内嵌触摸屏， 其中， 包括： 具有数据线和栅线的 TFT阵列 基板；
至少一条所述栅线被设置为触控扫描线， 至少一条所述数据线被设置为 触控感应线； 或者， 至少一条所述数据线被设置为触控扫描线， 至少一条所 述栅线被设置为触控感应线； 其中，
所述触控扫描线用于传递触控扫描信号；
所述触控感应线用于通过感应电容来耦合所述触控扫描信号的电压信号 并输出该电压信号； 所述感应电容形成于所述触控扫描线与所述触控感应线 的异面相交处。
2、 如权利要求 1所述的触摸屏， 其中， 各所述触控扫描线之间的间距相 同， 各所述触控感应线之间的间距相同。
3、 如权利要求 2所述的触摸屏， 其中， 各所述触控扫描线之间的间距与 各所述触控感应线之间的间距相同。
4、 如权利要求 1-3中任一项所述的触摸屏， 其中， 还包括： 设置于所述 TFT阵列基板上方、 且与所述 TFT阵列基板大小相同的彩膜基板；
所述彩膜基板背向所述 TFT阵列基板的一面具有用于屏蔽电场的金属层； 5、 如权利要求 1-4任一项所述的触摸屏， 其中， 还包括： 与所述触控感 应线连接的触控接收器， 用于接收所述触控感应线输出的所述电压信号。
6、 如权利要求 5所述的触摸屏， 其中， 还包括： 设置在所述触控感应线 与所述触控接收器之间的触控开关， 用于在所述触控扫描线传递的触控扫描 信号对像素放电结束后， 开启所述触控感应线与所述触控接收器的连接； 在 所述触控扫描线传递的触控扫描信号对像素充电时， 关闭所述触控感应线与 所述触控接收器的连接。
7、 如权利要求 6所述的触摸屏， 其中， 还包括： 与所述触控感应线连接 的显示驱动器， 以及设置在所述触控感应线与所述显示驱动器之间的驱动开 关；
所述显示驱动器， 用于对所述触控感应线加载显示驱动信号； 所述驱动开关， 用于在所述触控扫描线传递的触控扫描信号对像素放电 结束后， 关闭所述触控感应线与所述显示驱动器的连接； 在所述触控扫描线 传递的触控扫描信号对像素充电时， 开启所述触控感应线与所述显示驱动器 的连接。
8、 如权利要求 7所述的触摸屏， 其中， 所述触控开关设置于所述触控接 收器的内部， 或设置于所述触控感应线与所述触控接收器的连接处；
所述驱动开关设置于所述显示驱动器的内部， 或设置于所述触控感应线 与所述显示驱动器的连接处。
9、 如权利要求 7或 8所述的触摸屏， 其中， 所述触控开关和所述驱动开 关为 TFT。
10、 一种显示装置， 其包括如权利要求 1-9 中任一项所述的电容式内嵌 触摸屏。
11、 一种基于如权利要求 1-9 中任一项所述的电容式内嵌触摸屏的触摸 定位方法， 包括：
对在所述触摸屏中设置的触控扫描线加载触控扫描信号；
检测触控感应线通过感应电容耦合出的所述触控扫描信号的电压信号； 以及
根据检测出的所述电压信号的变化以及所述感应电容的位置， 确定所述 触摸屏的触点位置。
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