WO2015014029A1 - 触摸屏及显示装置 - Google Patents

触摸屏及显示装置 Download PDF

Info

Publication number
WO2015014029A1
WO2015014029A1 PCT/CN2013/085695 CN2013085695W WO2015014029A1 WO 2015014029 A1 WO2015014029 A1 WO 2015014029A1 CN 2013085695 W CN2013085695 W CN 2013085695W WO 2015014029 A1 WO2015014029 A1 WO 2015014029A1
Authority
WO
WIPO (PCT)
Prior art keywords
touch
photosensitive
touch screen
line
array substrate
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/CN2013/085695
Other languages
English (en)
French (fr)
Inventor
张九占
徐宇博
胡明
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
Hefei BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology 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, Hefei BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Publication of WO2015014029A1 publication Critical patent/WO2015014029A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen

Definitions

  • the present invention relates to the field of touch screen technologies, and in particular, to a touch screen and a display device. Background technique
  • the touch screen generally includes: a resistive touch screen, a capacitive touch screen, an optical touch screen, and the like.
  • the touch screen generally includes: an out-cell touch panel externally mounted on the display panel, an on-cell touch panel on the display panel, and a touch screen embedded in the panel (In-cell touch) Panel).
  • the structure in which the touch screen is embedded in the panel can reduce the thickness of the touch screen as a whole, and can greatly reduce the manufacturing cost of the touch screen, which is favored by the major panel manufacturers.
  • the design of embedding the touch screen inside the panel is mainly realized by a resistive, capacitive or optical method.
  • the resistive type belongs to the low-end sensing technology, and the manufactured products generally have a short life span; the capacitive development is also popular and popular, but the capacitive touch screen is mainly suitable for small and medium-sized display devices, such as 10 inches or less. For larger display devices, capacitive touch screens can cause signal interference and signal delay.
  • Embodiments of the present invention provide a touch screen and a display device for solving the problem of signal interference and signal delay of a large-sized touch screen.
  • a touch panel includes an array substrate having a plurality of gate signal lines, and at least one gate signal line in the array substrate serves as a touch scan line.
  • the array substrate has a touch read line arranged in a staggered manner with the touch scan line;
  • a photosensitive unit and a touch control unit are included in a region defined by the touch scan line and the touch read line, wherein
  • the photosensitive unit and the touch switch unit are connected to the touch scan line, and the photosensitive unit is connected to the touch read line through the touch switch unit;
  • the photosensitive unit is turned on by illumination, and the photosensitive unit is opened to the touch
  • the off unit outputs a control signal, and the control signal controls the touch switch unit to output a touch sensing signal to the touch read line.
  • a display device includes a touch screen provided by an embodiment of the present invention.
  • Advantageous effects of embodiments of the present invention include:
  • the touch screen and the display device of the present invention provide at least one gate signal line in the array substrate as a touch scan line, and the array substrate has a touch read line arranged in a staggered manner with the touch scan line.
  • the photosensitive area and the touch switch unit are included in the area defined by the control scanning line and the touch reading line; wherein the photosensitive unit and the touch switch unit are connected to the touch scan line, and the photosensitive unit passes the touch switch unit and the touch
  • the reading line is connected; when the scanning scan line loads the scanning signal, the photosensitive unit is turned on by illumination, and the photosensitive unit outputs a control signal to the touch switch unit, and the control signal controls the touch switch unit to output to the touch reading line.
  • the touch sensing signal realizes the optical touch function, and does not cause signal interference and signal delay in a large size compared to the capacitive in-cell touch screen.
  • 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 cross-sectional view of a touch screen according to an embodiment of the present invention
  • FIG. 3 is a timing chart of operation of a touch screen 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. detailed description
  • the photosensitive unit 102 and the touch switch unit 103 are included in the area defined by the touch scan line Scan m and the touch read line Read out n;
  • the photosensitive unit 102 and the touch switch unit 103 are both connected to the touch scan line Scan m.
  • the unit 102 is connected to the touch reading line Read out n through the touch switch unit 103.
  • the touch scan line Scanm loads the scan signal
  • the photosensitive unit 102 is turned on by illumination, and the photosensitive unit 102 is turned to the touch switch unit.
  • the 103 outputs a control signal, and the control signal controls the touch switch unit 103 to output a touch sensing signal to the touch read line Read out n.
  • the touch screen when the light is illuminated, the touch screen has a touch, and when there is no light, the touch screen has no touch.
  • a plurality of pixel units 101 arranged in a matrix are further disposed on the array substrate, and in specific implementation, the touch read line Read out n It may be located between pixel units 101 of adjacent columns.
  • FIG. 2 further comprising: a facing substrate disposed opposite to the array substrate, the side of the opposite substrate facing the array substrate having a black matrix 104;
  • the pattern of the black matrix 104 is provided with an opening area at least in a region corresponding to the photosensitive unit 102, so that external light can be irradiated from the opening area to the photosensitive unit 102 to realize a touch function.
  • the touch screen provided by the embodiment of the present invention can be applied to a structure in which a color filter is disposed on a counter substrate, that is, a color film substrate, which is opposite to the array substrate.
  • a color filter can also be applied to the color filter.
  • the structure disposed in the array substrate is not limited herein.
  • the photo-sensing sub-unit 102 may include a phototransistor TFT1; the source of the phototransistor TFT1 and the touch scan line Scan m
  • the gate and the drain of the phototransistor TFT1 are connected to the touch switch unit 103.
  • the gate and the drain of the phototransistor TFT1 can be respectively connected to the touch switch unit 103, and the phototransistor TFT1 can also be connected.
  • the gate and the drain are connected to each other and then connected to the touch switch unit 103, which is not limited herein.
  • the working principle of the phototransistor TFT1 is that when there is a light illuminating the phototransistor TFT1 and a potential difference exists between the source and the drain of the phototransistor TFT1, the number of carriers in the active layer of the phototransistor TFT1 increases rapidly. A large photocurrent is generated between the source and the drain of the phototransistor TFT1, that is, the photosensitive cell is in an on state at this time; the phototransistor TFT1 is irradiated with light, but there is no potential between the source and the drain of the phototransistor TFT1.
  • the photo transistor TFT1 has a control signal output only when the scanning scan line Scanm loads the scan signal and light illuminates the photo transistor TFT1.
  • the photosensitive unit may also be other structures, which is not limited herein.
  • the phototransistor may be an infrared photo transistor, and of course, other phototransistors that implement the technical solution of the present invention are not limited herein.
  • the touch switch unit 103 for connecting the photosensitive unit 102 and the touch read line Read out n may specifically include a thin film transistor TFT2, wherein The gate of the thin film transistor TFT2 is connected to the photosensitive unit 102. The drain of the thin film transistor TFT2 is connected to the touch read line Read out n, and the source of the thin film transistor TFT2 is connected to the touch scan line Scanm.
  • the touch switch unit can also be other structures, which are not limited herein.
  • the source and the drain of the transistor in the embodiment of the present invention are not specifically distinguished, and the source and the drain are interchangeable.
  • one of the poles is referred to as a source and the other pole is referred to as a drain. If the source is selected as the signal input, the drain acts as the signal output and vice versa.
  • the touch switch unit 103 is the thin film transistor TFT2
  • the photosensitive unit 102 is the phototransistor TFT1
  • the source of the phototransistor TFT1 and the touch scan line Scan m is connected, and the gate and the drain of the phototransistor TFT1 are connected to the gate of the thin film transistor TFT2.
  • the thin film transistor TFT2 When the control signal output from the photosensitive unit 102 to the gate of the thin film transistor TFT2 as the touch switch unit 103 is greater than or equal to the gate threshold voltage of the thin film transistor TFT2, the thin film transistor TFT2 is in an on state, and if the thin film transistor TFT2 is When there is a potential difference between the source and the drain, a current is generated between the source and the drain of the thin film transistor TFT2, and the touch sensing signal is outputted to the touch read line Read out n.
  • the photosensitive unit can only output a control signal when the touch scan line is loaded with a scan signal (for example, when the touch scan line is at a high potential), and the touch switch unit only outputs a control signal greater than or equal to that at the photosensitive unit.
  • the threshold voltage of the touch switch unit is turned on when it is turned on, and is turned off for the rest of the time. That is, the touch switch unit may be turned on only when the touch scan line loads the scan signal.
  • the source of the thin film transistor as the touch switch unit is directly connected to the touch scan line, and the thin potential signal line is separately set to input the high potential signal to the source of the thin film transistor.
  • the membrane transistor is only input with a high potential signal when it is likely to be turned on, which saves the power consumption of the touch screen.
  • there is still a leakage current when the thin film transistor is in a closed state and its magnitude is proportional to the potential difference between the source and the drain of the thin film transistor, and the high potential signal line and the thin film transistor as the touch switch unit are separately provided.
  • the source of the thin film transistor When connected, the source of the thin film transistor is always at a high potential, causing a large leakage current of the thin film transistor to flow to the touch reading line, thereby reducing the sensitivity of the touch screen.
  • the source of the thin film transistor as the touch switch unit is directly connected to the touch scan line, so that the thin film transistor is at a high potential only when it is likely to be in an on state. . Therefore, the source of the thin film transistor as the touch switch unit is directly connected to the touch scan line, and the sensitivity of the touch screen can be improved, and the sensitivity of the touch screen can be improved, compared with separately setting the high potential signal line so that the source of the thin film transistor is always at a high potential.
  • the signal to noise ratio of the touch screen is not limited to the touch screen.
  • the source of the thin film transistor as the touch switch unit is directly connected to the touch scan line, and the high-potential signal line connected to the source thereof can be omitted, thereby ensuring the aperture ratio of the touch screen.
  • each component of the thin film transistor as the touch switch unit can be prepared in the same layer as the existing components of the thin film transistor that controls the switching of the pixel unit in the array substrate, so that the new preparation process is not required, and only the corresponding change is needed.
  • the patterning of each film layer can be realized, which saves production cost and improves production efficiency.
  • the touch switch can also be other structures, which will not be described in detail herein.
  • the specific operation of the touch screen provided by the embodiment of the present invention is as follows, taking the structure of the photosensitive unit as the photosensitive transistor TFT1 and the touch switch unit as the thin film transistor TFT2 as an example.
  • the principle is to introduce the tube.
  • 201, 202, and 203 are input signal waveform diagrams of gate signal lines Gate n-1, Gate n, and Gate n+1, respectively, Gate n is used as a touch scan line, and 204 is light illuminating the phototransistor TFT1.
  • An output signal waveform diagram of the touch read line Read out n, and 205 is an output signal waveform diagram of the touch read line Read out n when the phototransistor TFT1 is not illuminated.
  • the gate signal line Gate n-1 201 is at a high potential V gh
  • the gate signal line Gate n 202 is a touch scan line at a low potential V gl
  • the gate signal line Gate n+1 203 is also at There is no potential difference between the low potential V gl , the source and the drain of the phototransistor TFT1 and the source and the drain of the thin film transistor TFT2, and there is no light to illuminate the phototransistor TFT1, and the phototransistor TFT1 has no control signal output.
  • the touch read line Read out n has no touch sensing signal output.
  • the gate signal lines Gate n-1 201 and Gate n+1 203 are at a low potential V gl
  • the gate signal line Gate n 202 is a source of the touch scan line at a high potential V gh
  • the phototransistor TFT1 There is a potential difference between the drain and the drain and between the source and the drain of the thin film transistor TFT2.
  • a photocurrent is generated between the source and the drain of the phototransistor, that is, the photoreceptor is turned on, and the phototransistor TFT1 outputs a signal of the touch scan line to its source as a control signal to the thin film transistor TFT2.
  • the thin film transistor TFT2 When the control signal is greater than or equal to the gate voltage of the thin film transistor TFT2, the thin film transistor TFT2 is turned on, and the thin film transistor TFT2 outputs the signal of the touch scan line to the source thereof as a touch sensing signal to the touch.
  • the photodetector TFT1 When the photodetector TFT1 is not illuminated, the phototransistor TFT1 is turned off, and the phototransistor TFT1 has no control signal output to the thin film transistor TFT2, so the touch read line Read out n has no touch sensing signal. Output.
  • the gate signal line Gate n-1 201 is at the low potential V gl
  • the gate signal line Gate n 202 that is, the touch scan line is also at the low potential V gl
  • the gate signal line Gate n+1 203 is at High potential V gh
  • the touch precision of the touch screen is usually in the order of millimeters, and the display precision of the array substrate is usually on the order of micrometers. It can be seen that the touch scan lines and the touch read lines required for the touch screen are required to be displayed on the array substrate.
  • the driving lines are much less. Therefore, in the touch screen provided by the embodiment of the invention, when the touch reading line and the touch scanning line are set, the touch can be generally The spacing between the control scan lines is set to be the same, and the spacing between the touch read lines is set to be the same.
  • the spacing between the touch scan lines and the distance between the touch read lines can be set to be the same to unify the touch precision of the touch screen.
  • the touch read lines and the data signal lines in the array substrate are disposed in the same layer and insulated from each other, that is, Each of the data signal lines is prepared while preparing a touch read line insulated from each other, so that no additional preparation process is required in preparing the array substrate, and only one patterning process is required to form the data signal line and the touch read.
  • the drawing of the line can save the preparation cost and increase the added value of the product.
  • the touch read line and the data signal line can be separately prepared, which is not limited herein.
  • the gate signal line of the substrate, the photosensitive unit and the touch switch unit are not shown in FIG. 4.
  • a double gate structure a plurality of pixel units arranged in a matrix are arranged on the array substrate, and adjacent rows on the array substrate There are two gate signal lines between the pixel units, such as Gatel and Gate2, Gate3 and Gate4, Gate5 and Gate6, and each adjacent two columns of pixel units share a data signal line Datel between the two columns of pixel units, Date2, Date3.
  • two gate signal lines between the pixel units such as Gatel and Gate2, Gate3 and Gate4, Gate5 and Gate6
  • each adjacent two columns of pixel units share a data signal line Datel between the two columns of pixel units, Date2, Date3.
  • each touch read line Read out n can be disposed at a gap between adjacent pixel unit columns, that is, each touch read line Read out n is specifically located in an adjacent pixel unit column. At the gap between the two, the occupancy of the pixel unit can be further reduced, and the touch screen has a large aperture ratio.
  • an embodiment of the present invention further provides a display device, which includes the above touch screen provided by the embodiment of the present invention, and the display device may be: a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigation Any product or part that has a display function.
  • the display device reference may be made to the embodiment of the touch screen described above, and the repeated description is omitted.
  • the touch screen and the display device of the present invention provide at least one gate signal line in the array substrate as a touch scan line, and the array substrate has a touch read line arranged in a staggered manner with the touch scan line.
  • the photosensitive area and the touch switch unit are included in the area defined by the control scanning line and the touch reading line; wherein the photosensitive unit and the touch switch unit are connected to the touch scan line, and the photosensitive unit passes the touch switch unit and the touch The reading line is connected; when the scanning scan line loads the scanning signal, the photosensitive unit is turned on by illumination, and the photosensitive unit outputs a control signal to the touch switch unit, and the control signal controls the touch switch unit to output to the touch reading line.
  • the touch sensing signal realizes the optical touch function, and does not cause signal interference and signal delay in a large size compared to the capacitive in-cell touch screen.
  • the spirit and scope of the Ming Thus, it is intended that the present invention cover the modifications and variations of the inventions

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

本发明公开了一种触摸屏及显示装置，将阵列基板中的至少一条栅极信号线作为触控扫描线，阵列基板具有与触控扫描线交错排布的触控读取线，在触控扫描线和触控读取线所限定区域内包含有感光单元和触控开关单元；其中，感光单元和触控开关单元都与触控扫描线相连，感光单元通过触控开关单元与触控读取线相连；在触控扫描线加载扫描信号时，通过光照使感光单元处于开启状态，该感光单元向触控开关单元输出控制信号，控制信号控制触控开关单元向触控读取线输出触控感测信号，实现光学式触控功能，相对于电容式内嵌触摸屏，在大尺寸时不会产生信号干扰和信号延迟的问题。

Description

触摸屏 示装置
技术领域
本发明涉及触摸屏技术领域， 尤其涉及一种触摸屏及显示装置。 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， 按照原理分类， 触摸屏大致包括： 电阻式触摸屏、 电容式 触摸屏、 光学式触摸屏等。 按照组成结构分类， 触摸屏大致包括： 外挂在显示 面板上的触摸屏 (Out-cell touch panel)、 在显示面板上面的触摸屏 (On-cell touch panel), 内嵌在面板中的触摸屏 (In-cell touch panel)。 其中， 将触摸屏内嵌在面 板中的结构既可以减少触摸屏整体的厚度， 又可以大大降低触摸屏的制作成 本， 受到各大面板厂家青睐。
目前， 主要通过电阻式、 电容式或光学式的方式， 实现将触摸屏内嵌在面 板内部的设计。其中， 电阻式属于低端传感技术，制作出的产品一般寿命较短； 电容式发展较快也备受欢迎，但是电容式触摸屏主要适用于中小尺寸的显示装 置， 例如 10寸或 10寸以下的产品， 对于较大尺寸的显示装置， 电容式触摸屏 会产生信号干扰和信号延迟的问题。 发明内容
本发明实施例提供了一种触摸屏及显示装置， 用以解决大尺寸触摸屏的信 号干扰和信号延迟的问题。
本发明实施例提供的一种触摸屏， 包括具有多条栅极信号线的阵列基板； 所述阵列基板中的至少一条栅极信号线作为触控扫描线；
所述阵列基板具有与所述触控扫描线交错排布的触控读取线；
在所述触控扫描线和所述触控读取线所限定区域内包含有感光单元和触 控开关单元， 其中，
所述感光单元和所述触控开关单元都与所述触控扫描线相连， 所述感光单 元通过所述触控开关单元与所述触控读取线相连； 在所述触控扫描线加载扫描 信号时， 通过光照使所述感光单元处于开启状态， 所述感光单元向所述触控开 关单元输出控制信号， 所述控制信号控制所述触控开关单元向所述触控读取线 输出触控感测信号。
本发明实施例提供的一种显示装置， 包括本发明实施例提供的触摸屏。 本发明实施例的有益效果包括：
本发明实施例提供的一种触摸屏及显示装置，将阵列基板中的至少一条栅 极信号线作为触控扫描线， 阵列基板具有与触控扫描线交错排布的触控读取 线， 在触控扫描线和触控读取线所限定区域内包含有感光单元和触控开关单 元； 其中， 感光单元和触控开关单元都与触控扫描线相连， 感光单元通过触控 开关单元与触控读取线相连； 在触控扫描线加载扫描信号时， 通过光照使感光 单元处于开启状态， 该感光单元向触控开关单元输出控制信号， 控制信号控制 触控开关单元向触控读取线输出触控感测信号， 实现了光学式触控功能， 相对 于电容式内嵌触摸屏， 在大尺寸时不会产生信号干扰和信号延迟的问题。 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为发明实施例提供的触摸屏的剖面图；
图 3为本发明实施例提供的触摸屏的工作时序图；
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触摸屏， 如图 1所示， 包括具有多条栅极信号线 Gate n (n=l,2,3... ... )的阵列基板；
阵列基板中的至少一条栅极信号线 Gate n(n=l,2,3... ... )作为触控扫描线
Scan m (m=l,2,3 );
阵列基板具有与触控扫描线 Scan m交错排布的触控读取线 Read out n (n=l,2,3... ... );
在触控扫描线 Scan m和触控读取线 Read out n所限定区域内包含有感光单 元 102和触控开关单元 103; 其中，
感光单元 102和触控开关单元 103都与触控扫描线 Scan m相连， 感光单 元 102通过触控开关单元 103与触控读取线 Read out n相连；在触控扫描线 Scan m加载扫描信号时， 通过光照使感光单元 102处于开启状态， 该感光单元 102 向触控开关单元 103输出控制信号， 该控制信号控制触控开关单元 103向触控 读取线 Read out n输出触控感测信号。
需要说明的是， 本发明实施例提供的上述触摸屏， 有光照即指触摸屏有触 摸， 无光照即指触摸屏无触摸。
进一步地， 在本发明实施例提供的上述触摸屏中， 如图 1所示， 在阵列基 板上还设有呈矩阵排列的多个像素单元 101 , 在具体实施时， 触控读取线 Read out n可以位于相邻列的像素单元 101之间。
进一步地， 在本发明实施例提供的上述触摸屏中， 如图 2所示， 还包括： 与阵列基板相对设置的对向基板， 对向基板面向阵列基板的一侧具有黑矩阵 104;
黑矩阵 104的图形至少在与感光单元 102对应的区域设置有开口区域， 这 样外部光线就可以从该开口区域照射到感光单元 102, 实现触控功能。
在具体实施时， 本发明实施例提供的上述触摸屏， 可以应用于将彩色滤光 片设置在与阵列基板相对的对向基板即彩膜基板的结构； 当然， 也可以应用于 将彩色滤光片设置在阵列基板中的结构， 在此不做限定。
具体地， 在本发明实施例提供的上述触摸屏中， 在具体实施时， 如图 1所 示，感光子单元 102可以包含一感光晶体管 TFT1 ;该感光晶体管 TFT1的源极 与触控扫描线 Scan m相连，感光晶体管 TFT1的栅极和漏极都与触控开关单元 103相连， 具体地， 可以将感光晶体管 TFT1的栅极和漏极分别与触控开关单 元 103相连， 也可以将感光晶体管 TFT1的栅极和漏极连接在一起以后再与触 控开关单元 103相连， 在此不做限定。
具体地，该感光晶体管 TFT1的工作原理为：在有光照射感光晶体管 TFT1 , 且感光晶体管 TFT1的源漏之间存在电位差时， 该感光晶体管 TFT1的活性层 中载流子数目会急速增加， 感光晶体管 TFT1的源极和漏极之间产生较大的光 电流， 即此时感光单元处于开启状态； 在有光照射感光晶体管 TFT1 , 但感光 晶体管 TFT1的源极与漏极之间不存在电位差时， 感光晶体管 TFT1源极和漏 极之间没有明显的电流产生； 在没有光照射感光晶体管 TFT1时， 该感光晶体 管 TFT1的活性层中载流子数目较少， 感光晶体管 TFT1处于关闭状态， 感光 晶体管 TFT1的源极与漏极之间是否存在电位差都不会产生电流。 并且， 当触 控扫描线 Scan m加载扫描信号时，感光晶体管 TFT1的源极与漏极之间才会存 在电位差。
综上， 只有当触控扫描线 Scan m加载扫描信号， 且有光照射该感光晶体 管 TFT1时， 感光晶体管 TFT1才会有控制信号输出。 当然感光单元也可以是 其他结构， 在此不做限定。
具体地， 在本发明实施例提供的触摸屏中， 感光晶体管可以为红外感光晶 体管， 当然也可以为实现本发明技术方案的其它感光晶体管， 在此不做限定。
较佳地， 在本发明实施例提供的触摸屏中， 如图 1所示， 用于连接感光单 元 102和触控读取线 Read out n的触控开关单元 103具体可以包含一个薄膜晶 体管 TFT2, 其中， 该薄膜晶体管 TFT2的栅极与感光单元 102相连， 薄膜晶体 管 TFT2的漏极与触控读取线 Read out n相连， 薄膜晶体管 TFT2的源极与触 控扫描线 Scan m相连。 当然触控开关单元也可以是其他结构， 在此不做限定。
需要说明的是本发明实施例中的晶体管的源极和漏极不作具体的区分， 源 漏极之间是可以互换的。 换句话说， 在本发明实施例中， 为区分晶体管除栅极 之外的两极， 将其中一极称为源极， 另一极称为漏极。 若选取源极作为信号输 入端、 则漏极作为信号输出端， 反之亦然。
并且，在本发明实施例提供的触摸屏中，如图 1所示， 当触控开关单元 103 为薄膜晶体管 TFT2时，感光单元 102为感光晶体管 TFT1时；感光晶体管 TFT1 的源极与触控扫描线 Scan m相连，感光晶体管 TFT1的栅极和漏极均与薄膜晶 体管 TFT2的栅极相连。 当感光单元 102输出到作为触控开关单元 103的薄膜 晶体管 TFT2的栅极的控制信号大于或等于薄膜晶体管 TFT2的栅极阈值电压 时， 薄膜晶体管 TFT2处于开启状态， 此时若该薄膜晶体管 TFT2的源极与漏 极之间存在电位差， 则在该薄膜晶体管 TFT2的源极和漏极之间产生电流， 向 触控读取线 Read out n输出触控感测信号。
综上， 感光单元只有在触控扫描线加载扫描信号时（例如， 触控扫描线处 在高电位时）才有可能输出控制信号， 触控开关单元只有在感光单元输出的控 制信号大于或等于触控开关单元开启的阈值电压时才会处于开启状态， 其余时 间都处于关闭状态。 即只有在触控扫描线加载扫描信号时， 触控开关单元才可 能处于开启状态。
因此， 将作为触控开关单元的薄膜晶体管的源极直接与触控扫描线相连， 与单独设置高电位信号线向薄膜晶体管的源极一直输入高电位信号相比，使薄 膜晶体管仅在其有可能处于开启状态时其源极才会被输入高电位信号， 这样可 以节省触摸屏的功耗。 并且， 众所周知， 薄膜晶体管处于关闭状态时仍有漏电 流存在， 其大小与薄膜晶体管的源极和漏极之间的电位差成正比， 单独设置高 电位信号线与作为触控开关单元的薄膜晶体管相连，会使该薄膜晶体管的源极 一直处于高电位， 导致薄膜晶体管产生较大的漏电流流向触控读取线， 从而降 低了触摸屏的灵敏度。 而本发明实施例提供的触摸屏中， 将作为触控开关单元 的薄膜晶体管的源极直接与触控扫描线相连，使薄膜晶体管仅在其有可能处于 开启状态时其源极才会处于高电位。 因此， 将作为触控开关单元的薄膜晶体管 的源极直接与触控扫描线相连， 与单独设置高电位信号线使薄膜晶体管的源极 一直处于高电位相比， 可以提高触摸屏的灵敏度， 进而提高触摸屏的信噪比。
同时， 将作为触控开关单元的薄膜晶体管的源极直接与触控扫描线相连还 可以省去单独设置与其源极相连的高电位信号线， 从而保证触摸屏的开口率。
在具体实施时，作为触控开关单元的薄膜晶体管的各个部件可以和阵列基 板中现有的控制像素单元开关的薄膜晶体管中各个部件同层制备， 这样不用增 加新的制备工艺， 仅需变更对应的各个膜层的构图即可实现， 节省了生产成 本， 提高了生产效率。 当然在具体实施时， 触控开关也可以是其他结构， 在此 不作详述。
下面结合如图 3所示的时序图， 以如图 1所示的感光单元具体为感光晶体 管 TFT1 ,触控开关单元具体为薄膜晶体管 TFT2的结构为例，对本发明实施例 提供的触摸屏的具体工作原理进行筒要介绍。
在图 3中， 201 , 202, 203分别为栅极信号线 Gate n-1 , Gate n, Gate n+1 的输入信号波形图， Gate n作为触控扫描线， 204为光照射感光晶体管 TFT1 时触控读取线 Read out n的输出信号波形图， 205为无光照射感光晶体管 TFT1 时触控读取线 Read out n的输出信号波形图。
在第一时段 T1 , 栅极信号线 Gate n-1 201 处于高电位 Vgh, 栅极信号线 Gate n 202 即触控扫描线处于低电位 Vgl, 栅极信号线 Gate n+1 203 也处于低 电位 Vgl,感光晶体管 TFT1的源极和漏极之间以及薄膜晶体管 TFT2的源极和 漏极之间都不存在电位差， 有无光照射感光晶体管 TFT1 , 感光晶体管 TFT1 都没有控制信号输出到薄膜晶体管 TFT2, 因此触控读取线 Read out n没有触 控感测信号输出。 在第二时段 T2,栅极信号线 Gate n-1 201 和 Gate n+1 203 处于低电位 Vgl, 栅极信号线 Gate n 202 即触控扫描线处于高电位 Vgh, 感光晶体管 TFT1的源 极和漏极之间以及薄膜晶体管 TFT2的源极和漏极之间存在电位差。 此时若光 照射感光晶体管 TFT1 , 感光晶体管的源漏极之间产生光电流， 即感光单元处 于开启状态， 感光晶体管 TFT1将触控扫描线输入其源极的信号作为控制信号 输出到薄膜晶体管 TFT2的栅极； 在控制信号大于或等于薄膜晶体管 TFT2的 栅极电压时， 薄膜晶体管 TFT2处于开启状态， 薄膜晶体管 TFT2将触控扫描 线输入其源极的信号作为触控感测信号输出到触控读取线 Read out n; 当无光 照射感光晶体管 TFT1时， 感光晶体管 TFT1处于关闭状态， 感光晶体管 TFT1 没有控制信号输出到薄膜晶体管 TFT2, 因此触控读取线 Read out n没有触控 感测信号输出。
在第三时段 T3,栅极信号线 Gate n-1 201 处于低电位 Vgl，栅极信号线 Gate n 202 即触控扫描线也处于低电位 Vgl, 栅极信号线 Gate n+1 203 处于高电位 Vgh, 感光晶体管 TFT1的源极和漏极之间以及薄膜晶体管 TFT2的源极和漏极 之间都不存在电位差，有无光照射感光晶体管 TFT1 ,感光晶体管 TFT1都没有 控制信号输出， 因此触控读取线 Read out n没有触控感测信号输出。
一般地， 触摸屏的触控精度通常在毫米级， 而阵列基板的显示精度通常在 微米级， 可以看出， 触控屏所需的触控扫描线和触控读取线比阵列基板显示所 需的驱动线（数据信号线和栅极信号线）要少的多， 因此， 在本发明实施例提 供的触摸屏中， 在设定触控读取线和触控扫描线时， 一般可以将各触控扫描线 之间的间距设置为相同， 各触控读取线之间的间距设置为相同。
最佳地， 可以将各触控扫描线之间的间距与各触控读取线之间的间距设置 为相同， 以统一触摸屏的触控精度。
进一步地， 在阵列基板中实现位于相邻列的像素单元之间的触控读取线 时， 可以将各触控读取线与阵列基板中的数据信号线同层设置且相互绝缘， 即 在制备各数据信号线的同时制备出与其相互绝缘的触控读取线， 这样， 在制备 阵列基板时不需要增加额外的制备工序， 只需要通过一次构图工艺即可形成数 据信号线和触控读取线的图形， 能够节省制备成本， 提升产品附加值。 当然可 以分别制备触控读取线和数据信号线， 在此不做限定。
较佳地， 为了能够最大限度的保证大尺寸的触摸屏的开口率， 本发明实施 例提供的触摸屏的阵列基板中的像素结构在具体实施时可以采用双栅结构， 如 图 4所示， 其中 Data n (n=l,2,3... ... )表示阵列基板的数据信号线， Gate n(n=l,2,3... ... )表示阵列基板的栅极信号线， 图 4中未示出感光单元和触控开关 单元， 在双栅结构中， 在阵列基板上设置有呈矩阵排列的多个像素单元， 阵列 基板上的相邻行的像素单元之间具有两个栅极信号线， 例如 Gatel和 Gate2、 Gate3和 Gate4、 Gate5和 Gate6, 且每相邻的两列像素单元共用一条位于该两 列像素单元之间的数据信号线 Datel、 Date2、 Date3。 在阵列基板上利用双栅 结构通过增加一倍数量的栅极信号线， 减少了数据信号线及源极驱动 IC的数 量， 从而降低显示器整体成本。
进一步地， 如图 4所示的双栅结构通过变更相邻两行像素单元的栅极信号 线和 TFT开关的位置，可以节省出布置相邻像素单元列之间数据信号线所需的 位置。 这样， 如图 4所示， 就可以在相邻像素单元列之间的间隙处设置各触控 读取线 Read out n, 即各触控读取线 Read out n具体位于相邻的像素单元列之 间的间隙处， 这样可以进一步减少像素单元的占用率， 保证触摸屏具有较大的 开口率。
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触摸屏及显示装置，将阵列基板中的至少一条栅 极信号线作为触控扫描线， 阵列基板具有与触控扫描线交错排布的触控读取 线， 在触控扫描线和触控读取线所限定区域内包含有感光单元和触控开关单 元； 其中， 感光单元和触控开关单元都与触控扫描线相连， 感光单元通过触控 开关单元与触控读取线相连； 在触控扫描线加载扫描信号时， 通过光照使感光 单元处于开启状态， 该感光单元向触控开关单元输出控制信号， 控制信号控制 触控开关单元向触控读取线输出触控感测信号， 实现了光学式触控功能， 相对 于电容式内嵌触摸屏， 在大尺寸时不会产生信号干扰和信号延迟的问题。 明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要求及 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 书
1、 一种触摸屏， 包括具有多条栅极信号线的阵列基板， 其中；
所述阵列基板中的至少一条栅极信号线作为触控扫描线；
所述阵列基板具有与所述触控扫描线交错排布的触控读取线；
在所述触控扫描线和所述触控读取线所限定区域内包含有感光单元和触 控开关单元； 其中，
所述感光单元和所述触控开关单元都与所述触控扫描线相连， 所述感光单 元通过所述触控开关单元与所述触控读取线相连； 在所述触控扫描线加载扫描 信号时， 通过光照使所述感光单元处于开启状态， 所述感光单元向所述触控开 关单元输出控制信号， 所述控制信号控制所述触控开关单元向所述触控读取线 输出触控感测信号。
2、如权利要求 1所述的触摸屏， 其中， 所述感光单元包含一感光晶体管； 所述感光晶体管的源极与所述触控扫描线相连， 所述感光晶体管的栅极和漏极 都与所述触控开关单元相连。
3、 如权利要求 2所述的触摸屏， 其中， 所述感光晶体管为红外感光晶体 管。
4、 如权利要求 1所述的触摸屏， 其中， 所述触控开关单元包含一薄膜晶 体管； 所述薄膜晶体管的源极与所述触控扫描线相连， 所述薄膜晶体管的漏极 与所述触控读取线相连， 所述薄膜晶体管的栅极与所述感光单元相连。
5、如权利要求 4所述的触摸屏， 其中， 所述感光单元包含一感光晶体管； 所述感光晶体管的源极与所述触控扫描线相连， 所述感光晶体管的栅极和漏极 均与所述薄膜晶体管的栅极相连。
6、 如权利要求 1-5任一项所述的触摸屏， 其中， 各所述触控读取线与所 述阵列基板中的数据信号线同层设置且相互绝缘。
7、 如权利要求 1-6任一项所述的触摸屏， 其中， 在所述阵列基板上设置 有呈矩阵排列的多个像素单元， 在所述阵列基板上相邻行的像素单元之间具有 两条栅极信号线， 且以相邻的两列像素单元为一组像素单元， 每组像素单元共 用一条位于该两列像素单元之间的数据信号线。
8、 如权利要求 7所述的触摸屏， 其中， 各所述触控读取线位于相邻列的 像素单元列之间的间隙处。
9、 如权利要求 1-8任一项所述的触摸屏， 其中， 还包括： 与所述阵列基 板相对设置的对向基板， 所述对向基板面向所述阵列基板的一侧具有黑矩阵; 所述黑矩阵的图形至少在与所述感光单元对应的区域设置有开口区域。
10、 一种显示装置， 其中， 包括如权利要求 1-9任一项所述的触摸屏。
PCT/CN2013/085695 2013-07-29 2013-10-22 触摸屏及显示装置 Ceased WO2015014029A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310322908.X 2013-07-29
CN201310322908.XA CN103412676B (zh) 2013-07-29 2013-07-29 一种触摸屏及显示装置

Publications (1)

Publication Number Publication Date
WO2015014029A1 true WO2015014029A1 (zh) 2015-02-05

Family

ID=49605692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/085695 Ceased WO2015014029A1 (zh) 2013-07-29 2013-10-22 触摸屏及显示装置

Country Status (2)

Country Link
CN (1) CN103412676B (zh)
WO (1) WO2015014029A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104679355B (zh) * 2015-03-19 2017-10-10 合肥鑫晟光电科技有限公司 一种光学触摸屏及显示装置
CN105679251B (zh) 2016-04-11 2018-11-30 京东方科技集团股份有限公司 触控显示模组及其驱动方法、触控显示面板和装置
CN106354345B (zh) * 2016-11-11 2020-01-10 京东方科技集团股份有限公司 触控单元、触控模组、内嵌式触控屏和显示装置
CN109147693B (zh) * 2018-09-03 2020-08-04 武汉华星光电半导体显示技术有限公司 具有红外识别的发光二极管显示装置
CN110264947B (zh) * 2019-06-18 2021-01-22 京东方科技集团股份有限公司 像素电路、驱动方法和显示装置
CN111521546B (zh) * 2020-06-15 2023-07-25 京东方科技集团股份有限公司 一种细胞传感器阵列和细胞检测芯片
CN112835225A (zh) * 2021-03-17 2021-05-25 维沃移动通信有限公司 触控显示装置和电子设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102073402A (zh) * 2009-11-20 2011-05-25 群康科技(深圳)有限公司 触控显示装置
CN102338946A (zh) * 2010-07-22 2012-02-01 瀚宇彩晶股份有限公司 光感测元件及包含该光感测元件的液晶显示器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6069674A (en) * 1995-05-19 2000-05-30 Sharp Kabushiki Kaisha Liquid crystal display apparatus
CN101266346B (zh) * 2007-03-13 2010-05-26 瀚宇彩晶股份有限公司 光敏元件及应用此光敏元件的液晶显示器
CN101556388B (zh) * 2008-04-11 2013-03-13 瀚宇彩晶股份有限公司 一种可输入信号的触控式面板
CN101770316B (zh) * 2010-01-08 2012-08-22 友达光电股份有限公司 光感测装置以及具该光感测装置的显示器
KR101289652B1 (ko) * 2010-12-10 2013-07-25 엘지디스플레이 주식회사 액정표시장치
CN202939579U (zh) * 2012-11-30 2013-05-15 北京京东方光电科技有限公司 一种半透半反式内嵌触摸屏及显示装置
CN203366282U (zh) * 2013-07-29 2013-12-25 合肥京东方光电科技有限公司 一种触摸屏及显示装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102073402A (zh) * 2009-11-20 2011-05-25 群康科技(深圳)有限公司 触控显示装置
CN102338946A (zh) * 2010-07-22 2012-02-01 瀚宇彩晶股份有限公司 光感测元件及包含该光感测元件的液晶显示器

Also Published As

Publication number Publication date
CN103412676A (zh) 2013-11-27
CN103412676B (zh) 2017-03-01

Similar Documents

Publication Publication Date Title
CN103294283B (zh) 一种光学传感式内嵌触摸屏及显示装置
CN103680385B (zh) 触控电路及其驱动方法、阵列基板、触控显示装置
TWI436322B (zh) 光敏電路以及光敏顯示器系統
CN103218076B (zh) 一种内嵌式触摸屏及显示装置
CN116560524B (zh) 用于自电容触摸传感器的集成触摸和显示架构
US9417749B2 (en) Slew rate and shunting control separation
EP2221659B1 (en) Display device having optical sensor
CN103176676B (zh) 一种触摸屏触摸点定位检测电路、触摸屏及显示装置
CN103513808B (zh) 触摸面板、触摸显示面板、触摸检测及显示方法
CN103412676B (zh) 一种触摸屏及显示装置
CN103413524B (zh) 有机发光二极管像素电路及其驱动方法、显示装置
CN101620333B (zh) 具有触控功能的有源矩阵显示装置
CN103728762A (zh) 一种触摸液晶显示屏阵列基板及相应的触摸液晶显示屏
CN101937291A (zh) 触摸屏及其驱动方法
WO2014139229A1 (zh) 电容式内嵌触摸屏及显示装置
WO2016202077A1 (zh) 一种内嵌式触摸屏及显示装置
WO2016188027A1 (zh) 内嵌触摸显示屏及触摸显示系统
CN104020595A (zh) 触控显示面板及触控显示装置
WO2015039403A1 (zh) 电容式内嵌触摸屏及显示装置
WO2017031934A1 (zh) 触控显示面板及其驱动方法和触控显示装置
US20140184570A1 (en) Hybrid sensing touchscreen apparatus and method of driving the same
CN104714695A (zh) 显示基板及其驱动方法、显示装置
CN106055156A (zh) 触控基板、显示面板及显示装置
CN102830857B (zh) 触摸显示面板及其制备方法、显示装置
TWI416390B (zh) 光感測裝置以及具該光感測裝置之顯示器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13890408

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13890408

Country of ref document: EP

Kind code of ref document: A1