WO2014153816A1 - 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
WO2014153816A1
WO2014153816A1 PCT/CN2013/075724 CN2013075724W WO2014153816A1 WO 2014153816 A1 WO2014153816 A1 WO 2014153816A1 CN 2013075724 W CN2013075724 W CN 2013075724W WO 2014153816 A1 WO2014153816 A1 WO 2014153816A1
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WIPO (PCT)
Prior art keywords
touch sensing
sensing electrode
touch
electrode
substrate
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PCT/CN2013/075724
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English (en)
French (fr)
Inventor
王春雷
董学
车春城
薛海林
王海生
王磊
谢建云
杨盛际
赵卫杰
Original Assignee
北京京东方光电科技有限公司
京东方科技集团股份有限公司
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Priority to US14/344,226 priority Critical patent/US20150029148A1/en
Publication of WO2014153816A1 publication Critical patent/WO2014153816A1/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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • 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; 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
    • 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
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
    • 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
    • G06F2203/04112—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

Definitions

  • the present disclosure relates to a capacitive in-cell touch screen and 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 an add-on touch panel, an on-cell touch panel, and an in-cell touch panel.
  • the external touch screen is produced by separately separating the touch screen from the liquid crystal display (LCD), and then bonding them together to form a liquid crystal display with touch function.
  • the external touch screen has higher production cost and light transmittance.
  • the in-cell touch panel embeds the touch electrodes of the touch screen inside the liquid crystal display, which can reduce the overall thickness of the module, and can greatly reduce the manufacturing cost of the touch screen, and is favored by the major panel manufacturers.
  • Transistor thin film field effect transistor directly adds touch scan lines and touch sensing lines on the array substrate, that is, two strip electrodes intersecting each other on the surface of the TFT array substrate are formed, and the two electrodes are respectively used as The touch driving line and the touch sensing line of the touch screen form a mutual capacitance at the intersection of the opposite faces of the two electrodes.
  • the working process is: when loading the touch driving signal to 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 will Acting on the mutual capacitance, the capacitance value of the mutual capacitance is changed, and then the voltage signal coupled by the touch sensing line is changed, and the position of the contact can be determined according to the change of the voltage signal.
  • the structure design of the capacitive in-cell touch panel is such that the touch signals added by the touch scan lines and the touch sensing lines in the existing TFT array substrate interfere with the original display signals in the TFT array substrate, thereby affecting The quality of the liquid crystal display screen reduces the reliability of the touch operation.
  • the embodiment of the invention provides a capacitive in-cell touch screen and a display device, which can be used to solve the problem that the display signal and the touch signal interfere with each other in the existing in-cell touch panel.
  • a capacitive in-cell touch panel provided by the embodiment of the invention includes a substrate and a black matrix disposed on the substrate, and further includes a first touch sensing electrode between the substrate and the black matrix, and is located at The black matrix faces away from the second touch sensing electrode on one side of the substrate.
  • the black matrix has an open area arranged in a matrix
  • the first touch sensing electrode extends along a row direction of the opening region, and the second touch sensing electrode extends along a column direction of the opening region; or, the second touch sensing electrode is along the opening region
  • the row sensing direction extends, and the first touch sensing electrodes extend along a column direction of the opening region.
  • the material of the first touch sensing electrode is a metal material or a transparent conductive material
  • the material of the second touch sensing electrode is a metal material or a transparent conductive material
  • a material of the first touch sensing electrode is a metal material, and an orthographic projection of the first touch sensing electrode on the substrate is located within an orthographic projection of the black matrix;
  • the material of the second touch sensing electrode is a metal material, and the orthographic projection of the second touch sensing electrode on the substrate is located within the orthographic projection of the black matrix.
  • the material of the first touch sensing electrode is a transparent conductive material, and the first touch sensing electrode has a diamond electrode structure;
  • the material of the second touch sensing electrode is a transparent conductive material, and the second touch sensing electrode has a diamond electrode structure.
  • first touch sensing electrode and/or the second touch sensing electrode have a retracted structure at an intersection of the first touch sensing electrode and the second touch sensing electrode.
  • the material of the first touch sensing electrode is a transparent conductive material
  • the first touch sensing electrode is grounded during a display period
  • the first touch sensing electrode couples the touch scan signal loaded by the second touch sensing electrode and outputs the touch scan signal.
  • the material of the second touch sensing electrode is a transparent conductive material, and the second touch sensing electrode constitutes a common electrode layer;
  • the material of the first touch sensing electrode is a transparent conductive material; the first touch sensing electrode is grounded during a display period;
  • the touch scan signals are loaded on each of the first touch sensing electrodes.
  • the material of the second touch sensing electrode is a transparent conductive material, and the second touch sensing electrode constitutes a common electrode layer;
  • a display device includes a capacitive in-cell touch panel provided by an embodiment of the invention.
  • FIG. 1 is a schematic structural diagram of a capacitive in-cell touch panel according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a substrate according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an exemplary structure between a first touch sensing electrode and a second touch sensing electrode according to an embodiment of the present disclosure
  • FIG. 4 is a second schematic structural diagram of a first touch sensing electrode and a second touch sensing electrode according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a lead wire of a touch screen according to an embodiment of the present invention. detailed description
  • a capacitive in-cell touch panel provided by the embodiment of the present invention, as shown in FIG. 1 , includes a substrate 01 and a black matrix 02 disposed on the substrate 01.
  • the method further includes: a first touch between the substrate 01 and the black matrix 02
  • the sensing electrode 03 and the second touch sensing electrode 04 located on the side of the black matrix 02 facing away from the substrate 01.
  • the first touch sensing electrode 03 may be a touch sensing electrode (Rx , receive ), and the second touch sensing electrode 04 is correspondingly a touch driving electrode ( Tx, Transport ); otherwise, the first touch sensing electrode
  • the touch sensing electrode Tx is correspondingly the touch sensing electrode Rx, which is not limited herein.
  • the touch screen provided by the embodiment of the present invention can be applied to the structure in which the color filter 05 is disposed on the substrate opposite to the TFT array substrate 20 (ie, the color filter substrate 10 ), and can also be applied to color.
  • the structure in which the filter is disposed in the TFT array substrate is not limited herein.
  • the first touch sensing electrode 03 or the second touch sensing electrode 04 of the Tx is disposed on the color filter substrate 10 away from the TFT array substrate 20.
  • the touch driving electrode Tx loads the touch scanning signal
  • the touch scanning signal can be reduced.
  • the interference of the display signals such as the gate scan signal and the gray scale signal loaded on the TFT array substrate 20 ensures the display picture quality of the touch panel.
  • the first touch sensing electrode 03 or the second touch sensing electrode 04 as the touch sensing electrode Rx is also disposed on the color filter substrate 10 away from the TFT array substrate 20, and the touch sensing electrode Rx is coupled to the touch.
  • the signal is scanned, the interference between the display signal loaded on the TFT array substrate 20 and the electrical signal coupled to the touch sensing electrode Rx can be reduced, and the reliability of the touch operation is improved.
  • the black matrix 02 formed on the substrate 01 generally has an open area 06 arranged in a matrix, and the open area 06 and each of the TFT array substrates The effective display area of the pixel unit corresponds.
  • the first touch sensing electrodes 03 formed on the substrate 01 may extend along the row direction of the opening region 06, and the second touch sensing electrodes 04 may follow the columns of the opening regions 06.
  • the direction extension that is, the cloth of the first touch sensing electrode 03 and the gate signal line in the TFT array substrate disposed on the substrate 01
  • the line directions are identical, and the second touch sensing electrodes 04 arranged on the substrate 01 coincide with the wiring direction of the data signal lines in the TFT array substrate.
  • the first touch sensing electrodes formed on the substrate may extend along the column direction of the opening region, and the second touch sensing electrodes may extend along the row direction of the opening region, that is, the second touch sensing disposed on the substrate
  • the electrodes are aligned with the wiring direction of the gate signal lines in the TFT array substrate, and the first touch sensing electrodes arranged on the substrate are aligned with the wiring direction of the data signal lines in the TFT array substrate.
  • the extending directions of the first touch sensing electrodes and the second touch sensing electrodes disposed on the substrate may also be along other directions, which are not limited herein.
  • each of the first touch sensing electrodes extends in the row direction of the opening region
  • each of the second touch sensing electrodes extends along the column direction of the opening region as an example.
  • the first touch sensing electrode may be made of a metal material or a transparent conductive material.
  • the second touch sensing electrode may also be made of a metal material or a transparent conductive material.
  • the first touch sensing electrode 03 when the first touch sensing electrode 03 is prepared by using a metal material, the first touch sensing electrode 03 is generally disposed at a position blocked by the black matrix 02 due to the opaque property of the metal, as shown in FIG. That is, the orthographic projection of the first touch sensing electrode 03 on the substrate 01 is located within the orthographic projection of the black matrix 02 to avoid affecting the aperture ratio of the pixel unit by the first touch sensing electrode 03 prepared by metal.
  • the first touch sensing electrode 03 made of a metal material is used as the touch driving electrode Tx, since the resistance of the first touch sensing electrode 03 is relatively small, the touch driving electrode Tx can be effectively reduced.
  • the second touch sensing electrode 04 when the second touch sensing electrode 04 is prepared by using a metal material, the second touch sensing electrode 04 is generally disposed at a position blocked by the black matrix 02, that is, the second touch sensing electrode.
  • the orthographic projection on the substrate is located within the orthographic projection of the black matrix 02 to avoid affecting the aperture ratio of the pixel unit by the second touch sensing electrode 04 prepared by metal.
  • the black matrix 02 between the first touch sensing electrode 03 and the second touch sensing electrode 04 serves as insulation between the two. Layer, has been shorted.
  • the black matrix may be prepared using a material having a small dielectric constant to reduce the capacitance between the first touch sensing electrode 03 and the second touch sensing electrode 04, thereby improving the sensitivity of the touch.
  • the first touch sensing electrode 03 is located between the substrate and the black matrix, after the color film substrate and the TFT array substrate are paired with the box, the first touch sensing electrode 03 is relatively close to the viewer.
  • the first touch sensing electrode 03 is prepared from metal, which may affect the normal display of the touch screen due to the reflective material of the metal material. Therefore, in a specific implementation, the first touch sensing electrode 03 may be prepared using a transparent conductive material such as ITO.
  • the first touch sensing electrode 03 may have a diamond electrode structure, and the diamond electrode structure is as shown in FIG.
  • first touch sensing electrode 03 has a strip electrode structure or a diamond electrode structure
  • a retracting structure may be further disposed at an intersection of the first touch sensing electrode 03 and the second touch sensing electrode 04 to The overlap area between the first touch sensing electrode 03 and the second touch sensing electrode 04 is lowered, thereby reducing the node capacitance generated at the overlap to improve the touch sensitivity.
  • the first touch sensing electrode 03 and the second touch sensing electrode 04 are strip electrode structures having an inner portion at the intersection of the first touch sensing electrode 03 and the second touch sensing electrode 04.
  • the reduced structure 07 has a width at which the first touch sensing electrode 03 is smaller than a width at which the first touch sensing electrode 03 and the second touch sensing electrode 04 do not overlap.
  • the second touch sensing electrode 04 when the second touch sensing electrode 04 is prepared using a transparent conductive material, the second touch sensing electrode 04 may also be provided as a diamond electrode structure. Similarly, in order to reduce the node capacitance generated by the second touch sensing electrode 04 and the first touch sensing electrode 03 at the overlap, the second touch sensing electrode 04 and the first touch sensing electrode 03 may overlap. A shrinkage structure is provided to improve touch sensitivity.
  • a plurality of adjacent second touch sensing electrodes can be used as one second touch sensing electrode.
  • an adjacent plurality of second touch sensing electrodes may be turned on by a metal wire according to a required touch precision, and used as a second touch sensing electrode.
  • the adjacent plurality of first touch sensing electrodes can be turned on through the metal wires according to the required touch precision, and used as a first touch sensing electrode.
  • the first touch sensing electrodes 03 on the substrate are electrically connected to the TFT array substrate through the leads and the conductive paste (TR), and finally the IC chip. Connecting; connecting each of the second touch sensing electrodes 04 to the touch flexible circuit board (Touch FPC) through the substrate fanout area (fanout) and the conductive adhesive (TR).
  • Touch FPC touch flexible circuit board
  • the first touch sensing electrode in the touch screen provided by the embodiment of the present invention may further multiplex the function of the shielding electrode.
  • the time that the touch screen displays each frame V-sync) Display time period (Display) and touch time period (Touch), for example, the time of displaying one frame of the touch screen is 16.7 ms, for example, 5 ms is selected as the touch time period, and the other 11.7 ms is used as the display time period, of course, according to
  • the processing capability of the IC chip is appropriately adjusted for the duration of both, and is not specifically limited herein.
  • the first touch sensing electrode When the material of the first touch sensing electrode is a transparent conductive material, the first touch sensing electrode may be grounded during the display period to be used as a shield electrode to prevent external static electricity from interfering with the normal display of the touch screen.
  • the first touch sensing electrode In the touch time period, if the first touch sensing electrode is used as the touch sensing electrode, the first touch sensing electrode is coupled to the touch scan signal loaded by the second touch sensing electrode and output; if the first sensing is used The electrode is used as a touch driving electrode, and the first touch sensing electrode loads the touch scan signal.
  • the above touch screen provided by the embodiment of the present invention can be applied to various modes of the liquid crystal display panel, and can be applied, for example, to an in-plane switch (IPS, In-Plane Switch) and an advanced super-dimensional field switch (ADS) capable of realizing a wide viewing angle.
  • IPS in-plane switch
  • ADS advanced super-dimensional field switch
  • the Advanced Super Dimension Switch (LCD) panel can also be applied to a conventional TN (Twisted Nematic) type liquid crystal display panel, which is not limited herein.
  • the common electrode layer in the color filter substrate can be omitted, and the time-division driving is adopted, and the second touch sensing electrode prepared by the transparent conductive material is used to recover Use the function of the common electrode layer.
  • the common electrode signals are applied to the second touch sensing electrodes during the display period, and the second touch sensing electrodes are used as the common electrodes, and the TFTs are used.
  • the pixel electrode on the array substrate forms an electric field, which controls the liquid crystal to flip. During the touch time period, the second touch sensing electrode couples the touch scan signal and outputs.
  • the common electrode signals are applied to the second touch sensing electrodes during the display period, and the second touch sensing electrodes are used as the common electrodes, and the TFTs are used.
  • the pixel electrode on the array substrate forms an electric field, which controls the liquid crystal to flip.
  • the touch scan signals are loaded on each of the second touch sensing electrodes.
  • an embodiment of the present invention further provides a display device, including the above-mentioned capacitive in-cell touch panel provided by the embodiment of the present invention.
  • a display device including the above-mentioned capacitive in-cell touch panel provided by the embodiment of the present invention.
  • the display device refer to the embodiment of the capacitive in-cell touch panel described above, I won't go into details here.
  • a capacitive in-cell touch screen and display device provided by an embodiment of the invention are disposed on a substrate
  • the first touch sensing electrode and the second touch sensing electrode are insulated from each other; wherein the first touch sensing electrode is located between the substrate and the black matrix, and the second touch sensing electrode is located at a side of the black matrix facing away from the substrate.
  • the first touch sensing electrode and the second touch sensing electrode are disposed on the substrate away from the TFT array substrate, so that the touch signal and the display signal in the TFT array substrate can be prevented from interfering with each other, thereby ensuring the quality of the liquid crystal display image. It also enhances the reliability of touch operations.

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Abstract

本公开涉及一种电容式内嵌触摸屏及显示装置，在基板上设置相互绝缘的第一触摸感测电极和第二触摸感测电极；其中，第一触摸感测电极位于基板与黑矩阵之间，第二触摸感测电极位于黑矩阵背离基板的一侧。由于将第一触摸感测电极和第二触摸感测电极设置在远离TFT阵列基板的基板上，因此可以避免触控信号与TFT阵列基板中的显示信号相互干扰，既保证了液晶显示画面的品质，又增强了触控操作的可靠性。

Description

电容式内嵌触摸屏及显示装置 技术领域
本公开涉及一种电容式内嵌触摸屏及显示装置。 背景技术
随着显示技术的飞速发展， 触摸屏（ Touch Screen Panel ) 已经逐渐遍及 人们的生活中。 目前，触摸屏按照组成结构可以分为：外挂式触摸屏（Add on Mode Touch Panel )、 覆盖表面式触摸屏 ( On Cell Touch Panel )、 以及内嵌式 触摸屏（ In Cell Touch Panel )。 其中， 外挂式触摸屏是将触摸屏与液晶显示 屏（Liquid Crystal Display, LCD )分开生产， 然后贴合到一起成为具有触摸 功能的液晶显示屏， 外挂式触摸屏存在制作成本较高、 光透过率较低、 模组 较厚等缺点。 而内嵌式触摸屏将触摸屏的触控电极内嵌在液晶显示屏内部， 可以减薄模组整体的厚度， 又可以大大降低触摸屏的制作成本， 受到各大面 板厂家青睐。
目前， 现有的电容式内嵌（ in cell )触摸屏是在现有的 TFT ( Thin Film
Transistor, 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， 有人体接触触摸屏时， 人体电场就会作用在互电容上， 使互电容的电容值发 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。
上述电容式内嵌触摸屏的结构设计，在现有的 TFT阵列基板中增加的触 控扫描线和触控感应线加载的触控信号，会与 TFT阵列基板中原有的显示信 号相互干扰， 既影响了液晶显示画面的品质， 又降低了触控操作的可靠性。 发明内容 本发明实施例提供了一种电容式内嵌触摸屏及显示装置， 可以用以解决 现有的内嵌式触摸屏中显示信号与触控信号相互干扰的问题。
本发明实施例提供的一种电容式内嵌触摸屏， 包括基板以及设置在所述 基板上的黑矩阵，还包括位于所述基板与所述黑矩阵之间的第一触摸感测电 极， 以及位于所述黑矩阵背离所述基板一侧的第二触摸感测电极。
进一步地， 所述黑矩阵具有呈矩阵排列的开口区域；
所述第一触摸感测电极沿着开口区域的行方向延伸， 所述第二触摸感测 电极沿着开口区域的列方向延伸； 或， 所述第二触控感测电极沿着开口区域 的行方向延伸， 所述第一触控感测电极沿着开口区域的列方向延伸。
进一步地， 所述第一触控感测电极的材料为金属材料或透明导电材料； 所述第二触控感测电极的材料为金属材料或透明导电材料。
进一步地， 所述第一触摸感测电极的材料为金属材料， 所述第一触摸感 测电极在基板上的正投影位于所述黑矩阵的正投影之内；
所述第二触摸感测电极的材料为金属材料， 所述第二触摸感测电极在基 板上的正投影位于所述黑矩阵的正投影之内。
进一步地， 所述第一触摸感测电极的材料为透明导电材料， 所述第一触 摸感测电极具有菱形电极结构；
所述第二触摸感测电极的材料为透明导电材料， 所述第二触摸感测电极 具有菱形电极结构。
进一步地，所述第一触摸感测电极和 /或所述第二触摸感测电极在所述第 一触摸感测电极与所述第二触摸感测电极的交叠处具有内缩结构。
进一步地， 所述第一触摸感测电极的材料为透明导电材料；
在显示时间段， 所述第一触摸感测电极接地；
在触控时间段， 所述第一触摸感测电极耦合所述第二触摸感测电极加载 的触控扫描信号并输出。
进一步地， 所述第二触摸感测电极的材料为透明导电材料， 并且所述第 二触摸感测电极组成公共电极层；
在显示时间段， 对各所述第二触摸感测电极加载公共电极信号； 在触控时间段， 对各所述第二触摸感测电极加载触控扫描信号。 进一步地， 所述第一触摸感测电极的材料为透明导电材料； 在显示时间段， 所述第一触摸感测电极接地；
在触控时间段， 对各所述第一触摸感测电极加载触控扫描信号。
进一步地， 所述第二触摸感测电极的材料为透明导电材料， 所述第二触 摸感测电极组成公共电极层；
在显示时间段， 对各所述第二触摸感测电极加载公共电极信号； 在触控时间段， 所述第二触摸感测电极耦合所述触控扫描信号并输出。 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电容式内 嵌触摸屏。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 筒单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为本发明实施例提供的电容式内嵌触摸屏的结构示意图；
图 2为本发明实施例提供的基板的结构示意图；
图 3为本发明实施例提供的第一触摸感测电极与第二触摸感测电极之间 的示例性结构示意图之一；
图 4为本发明实施例提供的第一触摸感测电极与第二触摸感测电极之间 的示例性结构示意图之二； 和
图 5为本发明实施例提供的触摸屏的引线示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图， 对本发明实施例进行清楚、 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。
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。
附图中各层薄膜厚度和形状不反映真实比例， 目的只是示意说明本发明 的实施例。
本发明实施例提供的一种电容式内嵌触摸屏，如图 1所示， 包括基板 01 以及设置在基板 01上的黑矩阵 02; 还包括： 位于基板 01与黑矩阵 02之间 的第一触摸感测电极 03 ,以及位于黑矩阵 02背离基板 01—侧的第二触摸感 测电极 04。
在具体实施时， 第一触摸感测电极 03 可以是触摸感应电极 （Rx , receive ), 第二触摸感测电极 04对应地是触摸驱动电极（ Tx, Transport ); 反之， 第一触摸感测电极 03也可以是触摸驱动电极 Tx, 第二触摸感测电极 04对应地是触摸感应电极 Rx, 在此不做限定。
并且， 本发明实施例提供的上述触摸屏， 如图 1所示， 可以应用于彩色 滤光片 05设置在与 TFT阵列基板 20相对的基板（即彩膜基板 10 )的结构， 也可以应用于彩色滤光片设置在 TFT阵列基板中的结构， 在此不做限定。
本发明实施例提供的上述电容式内嵌触摸屏， 由于将作为触控驱动电极
Tx的第一触摸感测电极 03或第二触摸感测电极 04设置在远离 TFT阵列基 板 20的彩膜基板 10上， 在触控驱动电极 Tx加载触控扫描信号时， 可以减 少触控扫描信号对 TFT阵列基板 20上加载的诸如栅扫描信号和灰阶信号的 显示信号的干扰， 保证了触摸屏的显示画面品质。 并且， 由于将作为触控感 应电极 Rx的第一触摸感测电极 03或第二触摸感测电极 04也设置在远离 TFT阵列基板 20的彩膜基板 10上， 在触控感应电极 Rx耦合触控扫描信号 时， 可以减少在 TFT阵列基板 20上加载的显示信号对触控感应电极 Rx耦 合的电信号的干扰， 提高了触控操作的可靠性。
具体地， 本发明实施例提供的上述触摸屏中， 如图 2所示， 在基板 01 上形成的黑矩阵 02—般都具有呈矩阵排列的开口区域 06, 该开口区域 06 与 TFT阵列基板中各像素单元的有效显示区域相对应。在具体实施时，如图 2所示，在基板 01上形成的第一触摸感测电极 03可以沿着开口区域 06的行 方向延伸， 第二触摸感测电极 04可以沿着开口区域 06的列方向延伸， 即在 基板 01上布置的第一触摸感测电极 03与 TFT阵列基板中的栅极信号线的布 线方向一致，在基板 01上布置的第二触摸感测电极 04与 TFT阵列基板中的 数据信号线的布线方向一致。 或者， 在基板上形成的第一触摸感测电极可以 沿着开口区域的列方向延伸， 第二触摸感测电极可以沿着开口区域的行方向 延伸，即在基板上布置的第二触摸感测电极与 TFT阵列基板中的栅极信号线 的布线方向一致，在基板上布置的第一触摸感测电极与 TFT阵列基板中的数 据信号线的布线方向一致。 当然， 在基板上布置的第一触摸感测电极和第二 触摸感测电极的延伸方向也可以沿着其他方向， 在此不做限定。
下面以各第一触摸感测电极沿着开口区域的行方向延伸，各第二触摸感 测电极沿着开口区域的列方向延伸为例进行说明。
在具体实施时， 可以用金属材料或透明导电材料制备第一触摸感测电 极， 同理， 第二触摸感测电极也可以由金属材料或透明导电材料制备。
具体地， 在采用金属材料制备第一触摸感测电极 03时， 由于金属的不 透光特性， 一般会将第一触摸感测电极 03设置在被黑矩阵 02遮挡的位置， 如图 2所示， 即第一触摸感测电极 03在基板 01上的正投影位于黑矩阵 02 的正投影之内， 以避免采用金属制备的第一触摸感测电极 03影响像素单元 的开口率。 并且， 当采用金属材料制作的第一触摸感测电极 03作为触控驱 动电极 Tx使用时， 由于第一触摸感测电极 03的电阻相对较小， 可以有效降 低在触控驱动电极 Tx传递触控扫描信号时的时延（ Loading )。
同理， 如图 2所示， 在采用金属材料制备第二触摸感测电极 04时， 一 般会将第二触摸感测电极 04设置在被黑矩阵 02遮挡的位置， 即第二触摸感 测电极 04在基板上的正投影位于黑矩阵 02的正投影之内， 以避免采用金属 制备的第二触摸感测电极 04影响像素单元的开口率。
当第一触摸感测电极 03和第二触摸感测电极 04都采用金属材料制备 时， 在第一触摸感测电极 03和第二触摸感测电极 04之间的黑矩阵 02充当 两者的绝缘层， 已避免两者短接。 在具体实施时， 可以使用介电常数较小的 材料制备黑矩阵， 以减少第一触摸感测电极 03和第二触摸感测电极 04之间 的电容值， 从而提高触控的灵敏度。
进一步地， 由于第一触摸感测电极 03位于基板与黑矩阵之间， 在彩膜 基板与 TFT阵列基板对盒后， 第一触摸感测电极 03相对靠近观看者， 若采 用金属制备第一触摸感测电极 03,可能会因为金属材料反光而影响触摸屏的 正常显示， 因此， 在具体实施时， 可以采用诸如 ITO的透明导电材料制备第 一触摸感测电极 03。 当采用透明导电材料制备第一触摸感测电极 03时， 第 一触摸感测电极 03可以具有菱形电极结构， 菱形电极结构如图 3所示。
进一步地， 当第一触摸感测电极 03具有条状电极结构或菱形电极结构 时，还可以在第一触摸感测电极 03与第二触摸感测电极 04的交叠处设置内 缩结构， 以降低第一触摸感测电极 03与第二触摸感测电极 04之间的交叠面 积， 从而降低在交叠处生成的节点电容， 以提高触控灵敏度。 例如如图 4所 示， 第一触摸感测电极 03和第二触摸感测电极 04为条状电极结构， 在第一 触摸感测电极 03与第二触摸感测电极 04的交叠处具有内缩结构 07,第一触 摸感测电极 03在内缩结构 07处的宽度小于第一触摸感测电极 03与第二触 摸感测电极 04无交叠处的宽度。
此外， 在第二触摸感测电极 04采用透明导电材料制备时， 也可以将第 二触摸感测电极 04设置为菱形电极结构。 同理， 为了降低第二触摸感测电 极 04与第一触摸感测电极 03在交叠处生成的节点电容，也可以在第二触摸 感测电极 04与第一触摸感测电极 03的交叠处设置内缩结构， 以提高触控灵 敏度。
一般地， 触摸屏触控的精度通常在毫米级， 而液晶显示的精度通常在微 米级， 因此， 可以将多个相邻的第二触摸感测电极作为一条第二触摸感测电 极使用。 在具体实施时， 可以根据需要的触控精度， 将相邻的多条第二触摸 感测电极通过金属线导通， 作为一条第二触摸感测电极使用。 同理， 可以根 据需要的触控精度， 将相邻的多条第一触摸感测电极通过金属线导通， 作为 一条第一触摸感测电极使用。并且，如图 5所示（其中只是图示了部分引线）， 将在基板上的各条第一触摸感测电极 03通过引线以及导电胶（TR )与 TFT 阵列基板导通， 最终与 IC芯片连接； 将各条第二触摸感测电极 04通过基板 扇出区域（fanout ) 以及导电胶 ( TR ) 与触控柔性电路板 ( Touch FPC )相 连。
在具体实施时， 本发明实施例提供的触摸屏中的第一触摸感测电极还可 以复用屏蔽电极的功能。 首先， 将触摸屏显示每一帧 （V-sync ) 的时间分成 显示时间段（Display )和触控时间段（ Touch ), 例如触摸屏的显示一帧的时 间为 16.7ms, 例如选取其中 5ms作为触控时间段， 其他的 11.7ms作为显示 时间段， 当然也可以根据 IC芯片的处理能力适当的调整两者的时长， 在此 不做具体限定。
在第一触摸感测电极的材料为透明导电材料时， 在显示时间段， 第一触 摸感测电极可以接地， 作为屏蔽电极使用， 以防止外界静电干扰触摸屏的正 常显示。 在触控时间段， 若采用第一触摸感测电极作为触控感应电极使用， 则第一触摸感测电极耦合第二触摸感测电极加载的触控扫描信号并输出； 若 采用第一感测电极作为触控驱动电极使用， 则第一触摸感测电极加载触控扫 描信号。
具体地，本发明实施例提供的上述触摸屏可以适用于各种模式的液晶显 示面板， 例如可以适用于能够实现宽视角的平面内开关 （IPS , In-Plane Switch )和高级超维场开关（ADS, Advanced Super Dimension Switch )型液 晶显示面板， 也可以适用于传统的扭曲向列 （TN, Twisted Nematic )型液晶 显示面板， 在此不做限定。 在采用 TN型液晶显示面板制备本发明实施例提 供的上述触摸屏时， 可以省去彩膜基板中的公共电极层， 采取分时驱动， 利 用由透明导电材料制备的第二触摸感测电极来复用公共电极层的功能。
若采用各第二触摸感测电极作为触控感应电极使用， 则在显示时间段， 对各第二触摸感测电极加载公共电极信号， 此时第二触摸感测电极作为公共 电极使用， 与 TFT阵列基板上的像素电极形成电场， 控制液晶翻转。 在触控 时间段， 第二触摸感测电极耦合触控扫描信号并输出。
若采用各第二触摸感测电极作为触控驱动电极使用， 则在显示时间段， 对各第二触摸感测电极加载公共电极信号， 此时第二触摸感测电极作为公共 电极使用， 与 TFT阵列基板上的像素电极形成电场， 控制液晶翻转。 在触控 时间段， 对各所述第二触摸感测电极加载触控扫描信号。
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，在基板上设置 相互绝缘的第一触摸感测电极和第二触摸感测电极； 其中， 第一触摸感测电 极位于基板与黑矩阵之间， 第二触摸感测电极位于黑矩阵背离基板的一侧。 由于将第一触摸感测电极和第二触摸感测电极设置在远离 TFT 阵列基板的 基板上，可以避免触控信号与 TFT阵列基板中的显示信号相互干扰，既保证 了液晶显示画面的品质， 又增强了触控操作的可靠性。 发明的精神和范围。 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、 一种电容式内嵌触摸屏， 包括： 基板， 设置在所述基板上的黑矩阵， 位于所述基板与所述黑矩阵之间的第一触摸感测电极， 以及位于所述黑矩阵 背离所述基板一侧的第二触摸感测电极。
2、 如权利要求 1所述的触摸屏， 其中， 所述黑矩阵具有呈矩阵排列的 开口区域；
所述第一触摸感测电极沿着开口区域的行方向延伸， 所述第二触摸感测 电极沿着开口区域的列方向延伸； 或
所述第二触控感测电极沿着开口区域的行方向延伸， 所述第一触控感测 电极沿着开口区域的列方向延伸。
3、 如权利要求 1或 2所述的触摸屏， 其中， 所述第一触控感测电极的 材料为金属材料或透明导电材料； 所述第二触控感测电极的材料为金属材料 或透明导电材料。
4、 如权利要求 1或 2所述的触摸屏， 其中， 所述第一触摸感测电极的 材料为金属材料， 并且所述第一触摸感测电极在基板上的正投影位于所述黑 矩阵的正投影之内；
所述第二触摸感测电极的材料为金属材料， 并且所述第二触摸感测电极 在基板上的正投影位于所述黑矩阵的正投影之内。
5、 如权利要求 1或 2所述的触摸屏， 其中， 所述第一触摸感测电极的 材料为透明导电材料， 所述第一触摸感测电极具有菱形电极结构；
所述第二触摸感测电极的材料为透明导电材料， 所述第二触摸感测电极 具有菱形电极结构。
6、 如权利要求所述 1-5 中任一项所述的触摸屏， 其中， 所述第一触摸 感测电极和 /或所述第二触摸感测电极在所述第一触摸感测电极与所述第二 触摸感测电极的交叠处具有内缩结构。
7、 如权利要求 1-2和 5 中任一项所述的触摸屏， 其中， 所述第一触摸 感测电极的材料为透明导电材料；
在显示时间段， 所述第一触摸感测电极接地；
在触控时间段， 所述第一触摸感测电极耦合所述第二触摸感测电极加载 的触控扫描信号并输出。
8、 如权利要求 7所述的触摸屏， 其中， 所述第二触摸感测电极的材料 为透明导电材料， 所述第二触摸感测电极组成公共电极层；
在显示时间段， 对各所述第二触摸感测电极加载公共电极信号； 在触控时间段， 对各所述第二触摸感测电极加载触控扫描信号。
9、 如权利要求 1-2和 5 中任一项所述的触摸屏， 其中， 所述第一触摸 感测电极的材料为透明导电材料；
在显示时间段， 所述第一触摸感测电极接地；
在触控时间段， 对各所述第一触摸感测电极加载触控扫描信号。
10、 如权利要求 9所述的触摸屏， 其中， 所述第二触摸感测电极的材料 为透明导电材料， 所述第二触摸感测电极组成公共电极层；
在显示时间段， 对各所述第二触摸感测电极加载公共电极信号； 在触控时间段， 所述第二触摸感测电极耦合所述触控扫描信号并输出。
11、一种显示装置， 包括如权利要求 1-10任一项所述的电容式内嵌触摸 屏。
PCT/CN2013/075724 2013-03-28 2013-05-16 电容式内嵌触摸屏及显示装置 WO2014153816A1 (zh)

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