WO2014206051A1 - 电容式触摸屏及显示装置 - Google Patents

电容式触摸屏及显示装置 Download PDF

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Publication number
WO2014206051A1
WO2014206051A1 PCT/CN2013/090708 CN2013090708W WO2014206051A1 WO 2014206051 A1 WO2014206051 A1 WO 2014206051A1 CN 2013090708 W CN2013090708 W CN 2013090708W WO 2014206051 A1 WO2014206051 A1 WO 2014206051A1
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WO
WIPO (PCT)
Prior art keywords
electrode
touch
electrodes
touch sensing
shielding
Prior art date
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PCT/CN2013/090708
Other languages
English (en)
French (fr)
Inventor
鲁友强
张甜
柳皓笛
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/353,396 priority Critical patent/US9760218B2/en
Publication of WO2014206051A1 publication Critical patent/WO2014206051A1/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
    • 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
    • G06F3/044—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
    • G06F3/0446—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
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate

Definitions

  • Embodiments of the present invention relate to a capacitive 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 cover type touch screen directly forms a touch part on the side of the color filter substrate of the liquid crystal display facing away from the liquid crystal layer, and the surface touch type screen can reduce the thickness of the entire touch screen and enhance the light transmittance compared with the external touch screen.
  • the mainstream technology of the liquid crystal display is the planar electric field wide viewing angle core technology - Advanced Super Dimension Switch (ADS).
  • the core technology is: the electric field generated by the edge of the slit electrode in the same plane and the slit electrode.
  • the electric field generated between the layer and the plate electrode layer forms a multi-dimensional electric field, so that all the aligned liquid crystal molecules between the slit electrodes in the liquid crystal cell and directly above the electrode can be rotated, thereby improving the liquid crystal working efficiency and increasing the light transmission efficiency.
  • ADS technology can improve the picture quality of LCD screens, with high resolution, high transmittance, low power consumption, wide viewing angle, high aperture ratio, low chromatic aberration, and no push mura.
  • ADS technology improvements for different applications include high transmittance I-ADS technology, high aperture ratio H-ADS and high resolution S-ADS technology.
  • a whole layer of shielding electrodes are deposited on the side of the color film substrate of the ADS type liquid crystal display facing away from the liquid crystal layer, and then shielded.
  • a touch component is prepared on the electrode to form a covered surface touch screen.
  • the touch component specifically includes a touch sensing electrode and a touch driving electrode arranged in a cross direction, and a metal bridge bridging the adjacent touch driving electrode or the adjacent touch sensing electrode.
  • the touch driving electrode and the touch sensing electrode form a larger capacitance with the lower shielding electrode, which reduces the sensitivity of the touch sensing and affects the accuracy of the touch.
  • the embodiment of the invention provides a capacitive touch screen and a display device, which solves the problem of reducing the sensitivity of the touch sensing due to the large capacitance formed between the shielding electrode and the touch driving electrode and the touch sensing electrode in the prior art. .
  • a capacitive touch panel includes: an array substrate, a counter substrate opposite to the array substrate, and a liquid crystal layer between the opposite substrate and the array substrate; a shielding electrode, a touch driving electrode, and a touch sensing electrode are disposed on a side of the opposite substrate from the liquid crystal layer; wherein the touch driving electrode, the touch sensing electrode, and the shielding electrode are insulated from each other;
  • the touch driving electrodes are arranged in a cross arrangement with the touch sensing electrodes; the orthographic projection of the shielding electrodes on the opposite substrate falls into the touch driving electrodes and the touch sensing electrodes are arranged on the target substrate. Within the gap formed on the orthographic projection.
  • a display device includes a capacitive touch panel provided by an embodiment of the present invention.
  • FIG. 1 is a side view of a touch screen according to an embodiment of the present invention.
  • FIG. 2 is a top plan view of a touch screen provided by an example of the present invention.
  • Figure 3a is a schematic cross-sectional view taken along line AA of Figure 2
  • Figure 3b is a schematic cross-sectional view taken along line BB of Figure 2;
  • FIG. 4 is a top plan view of a touch screen provided by another example of the present invention.
  • FIG. 5 is a top plan view of a touch screen provided by still another example of the present invention. detailed description
  • the embodiment of the invention provides a capacitive touch screen, as shown in FIG. 1 , comprising: an array substrate 1 , a counter substrate 2 opposite to the array substrate 1 , and a liquid crystal layer 3 between the counter substrate 2 and the array substrate 1 ; a shielding electrode 4 disposed on a side of the counter substrate 2 facing away from the liquid crystal layer 3
  • the touch driving electrode 5 and the touch sensing electrode 6 are provided.
  • the touch driving electrode 5, the touch sensing electrode 6 and the shielding electrode 4 are insulated from each other; the touch driving electrode 5 and the touch sensing electrode 6 are arranged in a cross arrangement; and the shielding electrode 4 is on the opposite substrate 2.
  • the erecting projection falls within the gap of the orthographic projection formed on the opposite substrate by the touch driving electrode 5 and the touch sensing electrode 6.
  • the shield electrode 4 is disposed so as not to overlap with the orthographic projection of the touch driving electrode 5 or the touch sensing electrode 6 on the opposite substrate 2. In this way, the capacitance formed at the opposite side can be reduced by reducing the front surface between the shielding electrode 4 and the touch sensing electrode 6 or the touch driving electrode 5, thereby improving the sensitivity of the touch sensing and enhancing the touch. The accuracy of the control.
  • the touch screen provided by the embodiment of the present invention can be applied to an in-plane switch (IPS, In-Plane Switch) type liquid crystal display, an ADS type liquid crystal display, and various ADS improved liquid crystal displays. Make a limit.
  • IPS In-Plane Switch
  • ADS ADS type liquid crystal display
  • various ADS improved liquid crystal displays make a limit.
  • the extending directions of the touch driving electrode 5 and the touch sensing electrode 6 may be perpendicular to each other.
  • the touch driving electrode 5 is wired in a horizontal direction as shown in FIG. 2 .
  • the touch sensing electrodes 6 are wired in the vertical direction.
  • the extending direction of the touch driving electrode 5 and the touch sensing electrode 6 may also have a certain angle, which is not limited.
  • the spacing between any two adjacent touch driving electrodes 5 is generally set to Similarly, the spacing between any two adjacent touch sensing electrodes 6 is set to be the same.
  • the hierarchical relationship between the pole 4, the touch driving electrode 5 and the touch sensing electrode 6 will be described in detail.
  • the touch driving electrode 5 and the touch sensing electrode 6 may be disposed in the same layer, that is, the touch driving electrode 5 and the touch sensing electrode are simultaneously formed by one patterning process. 6 graphics.
  • the touch driving electrodes 5 and the touch sensing electrodes 6 disposed in the same layer may be located between the shielding electrode 4 and the opposite substrate 2, that is, the touch driving electrode 5 and the touch sensing electrode 6 are formed on the opposite substrate 2 first. Then, the shield electrode 4 was prepared.
  • the touch driving electrodes 5 and the touch sensing electrodes 6 disposed in the same layer may also be located on the side of the shielding electrode 4 facing away from the opposite substrate 2, for example, forming the shielding electrode 4 on the opposite substrate 2, and then preparing The touch driving electrode 5 and the touch sensing electrode 6 are not limited as shown in FIG. 2 .
  • each touch driving electrode 5 can be bridged by the first bridge electrode at the intersection with each touch sensing electrode 6; or as shown in FIG. 2, each touch sensing electrode 6 can be connected to each touch driving electrode 5
  • the intersection is bridged by the second bridge electrode 7, which is not limited herein.
  • 3a is a cross-sectional view taken along line A-A of FIG. 2, and the touch sensing electrodes 6 are connected by a second bridge electrode 7.
  • Figure 3b is a cross-sectional view taken along line B-B of Figure 2.
  • first bridging electrode and the second bridging electrode may be prepared using a transparent conductive material such as ITO or IZO, or may be prepared using an opaque metal material.
  • first bridge electrode and the second bridge electrode are prepared using a transparent conductive material
  • the first bridge electrode may be disposed in the same layer as the shield electrode 4 in order to save the process steps.
  • the second bridge electrode 7 can be disposed in the same layer as the shield electrode 4.
  • the wiring direction of the signal line 8 disposed in the same layer as the shield electrode 4 and connecting the shield electrodes 4 may be the same as the direction in which the touch driving electrode 5 extends, or may extend with the touch sensing electrode 6.
  • the directions are the same and are not limited here.
  • the signal line 8 is used to pass the same shield electrode signal to each of the shield electrodes 4, and the shield electrode signal is generally zero volts.
  • the touch driving electrodes 5 and the shielding electrodes 4 disposed in the same layer may be located between the touch sensing electrodes 6 and the opposite substrate 2 , that is, the touch driving electrodes 5 are formed on the opposite substrate 2 . And shielding the electrode 4, and then preparing the touch sensing electrode 6.
  • the touch driving electrodes 5 and the shielding electrodes 4 disposed in the same layer may also be located on the side of the touch sensing electrode 6 facing away from the opposite substrate 2, that is, the touch sensing electrode 6 is formed on the opposite substrate 2, and then The touch driving electrode 5 and the shielding electrode 4 are prepared, which are not limited herein.
  • the advantage of disposing the touch driving electrode 5 and the touch sensing electrode 6 in the different layers is that the first bridging electrode and the second bridging electrode can be omitted.
  • the wiring direction of the signal line 8 disposed in the same layer as the shield electrode 4 and connecting the shield electrodes 4 needs to coincide with the extending direction of the touch driving electrode 5 to avoid the signal line 8 and the touch driving.
  • the electrodes 5 intersect.
  • the signal line 8 is used to pass the same shielded electrode signal to each of the shield electrodes 4, and the shield electrode signal is generally zero volts.
  • the touch sensing electrodes 6 and the shield electrodes 4 on the opposite substrate 2 do not overlap each other, as shown in FIG. 5, the touch sensing electrodes 6 and the shielding may be The electrodes 4 are disposed in the same layer, that is, the patterns of the touch sensing electrodes 6 and the shield electrodes 4 are simultaneously formed by one patterning process.
  • the touch sensing electrodes 6 and the shielding electrodes 4 disposed in the same layer may be located between the touch driving electrodes 5 and the opposite substrate 2 , that is, the touch sensing electrodes 6 are formed on the opposite substrate 2 . And shielding the electrode 4, and then preparing the touch driving electrode 5.
  • the touch sensing electrodes 6 and the shielding electrodes 4 disposed in the same layer may also be located on the side of the touch driving electrode 5 facing away from the opposite substrate 2, that is, the touch driving electrode 5 is formed on the opposite substrate 2, and then The touch sensing electrode 6 and the shielding electrode 4 are prepared, which are not limited herein. It is good to set the touch driving electrode 5 and the touch sensing electrode 6 in different layers. It is possible to omit the provision of the first bridging electrode and the second bridging electrode.
  • the wiring direction of the signal line 8 disposed in the same layer as the shield electrode 4 and connecting the shield electrodes 4 needs to be consistent with the touch sensing electrode 6 to avoid the signal line 8 and the touch sensing electrode 6. cross.
  • the signal line 8 is used to pass the same shield electrode signal to each of the shield electrodes 4, and the shield electrode signal is generally zero volts.
  • an embodiment of the present invention further provides a display device, including the above capacitive touch screen provided by the embodiment of the present invention.
  • the display device can be any product or component having a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • the capacitive touch screen and the display device of the present invention provide a shielding electrode, a touch driving electrode and a touch sensing electrode on a side of the opposite substrate facing away from the liquid crystal layer; wherein, the touch driving electrode and the touch sensing electrode
  • the shielding electrode is insulated from the sensing electrode; the touch driving electrode and the touch sensing electrode are arranged in a cross arrangement; the orthographic projection of the shielding electrode on the opposite substrate falls between the touch driving electrode and the touch sensing electrode, and is formed on the opposite substrate.
  • the orthographic projection of the shielding electrode and the touch driving electrode or the touch sensing electrode on the opposite substrate does not overlap each other.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (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)
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Abstract

本发明的实施例公开了一种电容式触摸屏及显示装置。电容式触摸屏包括阵列基板，与阵列基板相对而置的对向基板，以及位于对向基板与阵列基板之间的液晶层，其中对向基板在背离液晶层的一侧设置有屏蔽电极、触控驱动电极和触控感应电极；触控驱动电极、触控感应电极和屏蔽电极之间相互绝缘；触控驱动电极与触控感应电极交叉排列；屏蔽电极在对向基板上的正投影落入触控驱动电极和触控感应电极交叉排列在对向基板上形成的正投影的间隙内。由此，屏蔽电极与触控驱动电极或触控感应电极在对向基板上的正投影互不重叠，减少了屏蔽电极与触控感应电极或触控驱动电极之间的正对面的情况，降低在正对面处形成的电容，从而提高了触控感应的灵敏度。

Description

电容式触摸屏及显示装置 技术领域
本发明的实施例涉及一种电容式触摸屏及显示装置。 背景技术
随着显示技术的飞速发展， 触摸屏 ( Touch Screen Panel ) 已经逐渐遍及 人们的生活中。 目前，触摸屏按照组成结构可以分为：外挂式触摸屏（Add on Mode Touch Panel )、 覆盖表面式触摸屏 ( On Cell Touch Panel )、 以及内嵌式 触摸屏（ In Cell Touch Panel )。 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。覆盖表面式触摸屏是在液晶显示屏的彩膜基板背向液晶 层的一侧直接制作触控部件，相对于外挂式触摸屏覆盖表面式触摸屏可以减 薄整个触摸屏的厚度， 增强光透过率。
目前， 液晶显示屏主流应用平面电场宽视角核心技术-高级超维场转换 技术（ADS, Advanced Super Dimension Switch ), 其核心技术为： 通过同一 平面内狭缝电极边缘所产生的电场以及狭缝电极层与板状电极层间产生的 电场形成多维电场， 使液晶盒内狭缝电极间、 电极正上方所有取向液晶分子 都能够产生旋转，从而提高了液晶工作效率并增大了透光效率。 ADS技术可 以提高液晶显示屏的画面品质， 具有高分辨率、 高透过率、低功耗、 宽视角、 高开口率、 低色差、 无挤压水波纹（push Mura )等优点。 针对不同的应用， ADS技术的改进技术有高透过率 I-ADS技术、 高开口率 H-ADS和高分辨率 S-ADS技术等。
一般在 ADS型液晶显示屏中， 为了减少外部环境中的静电对显示质量 的影响， 会在 ADS型液晶显示屏的彩膜基板背向液晶层的一侧沉积一整层 屏蔽电极， 然后在屏蔽电极上制备触控部件， 最终形成覆盖表面式触摸屏。 触控部件具体包括交叉排列的触控感应电极和触控驱动电极， 以及桥接相邻 触控驱动电极或相邻触控感应电极的金属桥。 在这种结构的触摸屏中， 触控 驱动电极和触控感应电极会与下方的屏蔽电极形成较大的电容， 该电容会降 低触控感应的灵敏度， 影响触控的准确性。 发明内容
本发明实施例提供了一种电容式触摸屏及显示装置， 用以解决现有技术 中由于屏蔽电极与触控驱动电极和触控感应电极之间形成电容的较大， 而降 低触摸感应灵敏度的问题。
本发明实施例提供的一种电容式触摸屏， 包括： 阵列基板， 与所述阵列 基板相对而置的对向基板， 以及位于所述对向基板与所述阵列基板之间的液 晶层； 其中， 所述对向基板在背离所述液晶层的一侧设置有屏蔽电极、 触控 驱动电极和触控感应电极； 其中， 所述触控驱动电极、 触控感应电极和屏蔽 电极之间相互绝缘； 所述触控驱动电极与所述触控感应电极交叉排列； 所述 屏蔽电极在所述对向基板上的正投影落入所述触控驱动电极和触控感应电 极交叉排列在所述对象基板上形成的正投影的间隙内。
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为本发明的一种实施例提供的触摸屏的侧视示意图；
图 2为本发明的一种实例提供的触摸屏的俯视示意图；
图 3a为图 2中 A-A向的截面示意图； 图 3b为图 2中 B-B向的截面示意图；
图 4为本发明的另一种实例提供的触摸屏的俯视示意图；
图 5为本发明的再一种实例提供的触摸屏的俯视示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
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。 "包括" 或者 "包 含" 等类似的词语意指出现在 "包括" 或者 "包含" 前面的元件或者物件涵 盖出现在 "包括" 或者 "包含" 后面列举的元件或者物件及其等同， 并不排 除其他元件或者物件。 "连接" 或者 "相连" 等类似的词语并非限定于物理 的或者机械的连接， 而是可以包括电性的连接， 不管是直接的还是间接的。 "上"、 "下"、 "左"、 "右" 等仅用于表示相对位置关系， 当被描述对象的绝 对位置改变后， 则该相对位置关系也可能相应地改变。
下面结合附图，对本发明实施例提供的电容式触摸屏及显示装置的具体 实施方式进行详细地说明。
附图中各层薄膜的形状和大小不反映触摸屏的真实比例， 目的只是示意 说明本发明内容。
本发明实施例提供了一种电容式触摸屏， 如图 1所示， 包括： 阵列基板 1 , 与阵列基板 1相对而置的对向基板 2, 以及位于对向基板 2与阵列基板 1 之间的液晶层 3; 对向基板 2在背离液晶层 3的一侧设置有屏蔽电极 4、 触 控驱动电极 5和触控感应电极 6。
如图 2所示， 触控驱动电极 5、 触控感应电极 6和屏蔽电极 4之间相互 绝缘； 触控驱动电极 5与触控感应电极 6交叉排列； 屏蔽电极 4在对向基板 2上的正投影落入触控驱动电极 5和触控感应电极 6交叉排列在对向基板上 形成的正投影的间隙内。
本发明实施例提供的上述触摸屏中，将屏蔽电极 4设置为与触控驱动电 极 5或触控感应电极 6在对向基板 2上的正投影互不重叠。 这样， 可以通过 减少屏蔽电极 4与触控感应电极 6或触控驱动电极 5之间的正对面的情况， 降低在该正对面处形成的电容， 从而提高了触控感应的灵敏度， 增强了触控 的准确性。
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平面内开关 ( IPS, In-Plane Switch )型液晶显示屏、 ADS型液晶显示屏以及各种 ADS 改进型液晶显示屏， 在此不做限定。
例如， 在本发明实施例提供的上述触摸屏中， 可以将触控驱动电极 5和 触控感应电极 6的延伸方向设置为相互垂直，例如图 2所示将触控驱动电极 5按照水平方向布线， 将触控感应电极 6按照垂直方向布线。 这样， 通过对 触控驱动电极 5依次加载触控扫描信号可以确定出触摸点的 y方向坐标，通 过触摸感应电极 6耦合触控扫描信号的输出可以确定出触摸点的 X方向坐 标， 最终定位出触摸点的位置。 在具体实施时， 触控驱动电极 5和触控感应 电极 6的延伸方向也可具有一定的夹角， 在不做限定。
例如， 为了确保在触摸屏上各点触控精度的一致性， 在设置触控驱动电 极 5和触控感应电极 6时， 一般将任意相邻的两条触控驱动电极 5之间的间 距设置为相同， 将任意相邻的两条触控感应电极 6之间的间距设置为相同。 极 4、 触控驱动电极 5和触控感应电极 6之间的层级关系进行详细的说明。 实例一：
在本发明实施例提供的触摸屏中， 如图 2所示， 可以将触控驱动电极 5 和触控感应电极 6同层设置， 即通过一次构图工艺同时形成触控驱动电极 5 和触控感应电极 6的图形。 同层设置的各触控驱动电极 5和各触控感应电极 6可以位于屏蔽电极 4与对向基板 2之间， 即在对向基板 2上先形成触控驱 动电极 5和触控感应电极 6, 然后制备屏蔽电极 4。 当然， 同层设置的各触 控驱动电极 5和各触控感应电极 6也可以位于屏蔽电极 4背离对向基板 2的 一侧， 例如， 在对向基板 2上先形成屏蔽电极 4, 然后制备触控驱动电极 5 和触控感应电极 6, 如图 2所示， 在此不 限定。
并且， 为了保证在同层的触控驱动电极 5和触控感应电极 6之间相互绝 缘， 在两者的交叉处一般采用桥接结构。 具体地， 各触控驱动电极 5可以在 与各触控感应电极 6的交叉处通过第一桥接电极桥接； 或如图 2所示， 各触 控感应电极 6可以在与各触控驱动电极 5的交叉处通过第二桥接电极 7桥接， 在此不作限定。 图 3a为图 2中 A-A处的截面图， 触控感应电极 6通过第二 桥接电极 7相连。 图 3b为图 2中 B-B处的截面图。
进一步地， 第一桥接电极和第二桥接电极可以采用例如 ITO或 IZO的 透明导电材料制备， 也可以采用不透明的金属材料制备。 在第一桥接电极和 第二桥接电极采用透明导电材料制备时， 为了节省工艺步骤， 可以将第一桥 接电极与屏蔽电极 4同层设置。 例如， 如图 2所示， 可以将第二桥接电极 7 与屏蔽电极 4同层设置。
进一步地， 如图 2所示， 与屏蔽电极 4同层设置且连接各屏蔽电极 4的 信号线 8的布线方向可以与触控驱动电极 5延伸的方向相同，也可以与触控 感应电极 6延伸的方向相同， 在此不做限定。 信号线 8用于向各屏蔽电极 4 通入相同的屏蔽电极信号， 屏蔽电极信号一般为零伏。
实例二： 在本发明实施例提供的触摸屏中， 由于触控驱动电极 5与屏蔽电极 4在 对向基板 2上的正投影互不重叠， 因此， 如图 4所示， 可以将触控驱动电极 5与屏蔽电极 4同层设置， 即通过一次构图工艺同时形成触控驱动电极 5和 屏蔽电极 4的图形。
如图 4所示， 同层设置的各触控驱动电极 5和各屏蔽电极 4可以位于触 控感应电极 6与对向基板 2之间， 即在对向基板 2上先形成触控驱动电极 5 和屏蔽电极 4, 然后制备触控感应电极 6。 当然， 同层设置的各触控驱动电 极 5和各屏蔽电极 4也可以位于触控感应电极 6背离对向基板 2的一侧， 即 在对向基板 2上先形成触控感应电极 6 , 然后制备触控驱动电极 5和屏蔽电 极 4, 在此不做限定。 将触控驱动电极 5和触控感应电极 6设置在异层的好 处是可以省去设置第一桥接电极和第二桥接电极。
进一步地， 如图 4所示， 与屏蔽电极 4同层设置且连接各屏蔽电极 4的 信号线 8的布线方向需要与触控驱动电极 5的延伸方向一致， 以避免信号线 8与触控驱动电极 5交叉。 信号线 8用于向各屏蔽电极 4通入相同的屏蔽电 极信号， 屏蔽电极信号一般为零伏。
实例三：
在本发明实施例提供的触摸屏中， 由于触控感应电极 6与屏蔽电极 4在 对向基板 2上的正投影互不重叠， 因此， 如图 5所示， 可以将触控感应电极 6与屏蔽电极 4同层设置， 即通过一次构图工艺同时形成触控感应电极 6和 屏蔽电极 4的图形。
如图 5所示， 同层设置的各触控感应电极 6和各屏蔽电极 4可以位于触 控驱动电极 5与对向基板 2之间， 即在对向基板 2上先形成触控感应电极 6 和屏蔽电极 4, 然后制备触控驱动电极 5。 当然， 同层设置的各触控感应电 极 6和各屏蔽电极 4也可以位于触控驱动电极 5背离对向基板 2的一侧， 即 在对向基板 2上先形成触控驱动电极 5 , 然后制备触控感应电极 6和屏蔽电 极 4, 在此不做限定。 将触控驱动电极 5和触控感应电极 6设置在异层的好 处是可以省去设置第一桥接电极和第二桥接电极。
进一步地， 如图 5所示， 与屏蔽电极 4同层设置且连接各屏蔽电极 4的 信号线 8的布线方向需要与触控感应电极 6—致， 以避免信号线 8与触控感 应电极 6交叉。 信号线 8用于向各屏蔽电极 4通入相同的屏蔽电极信号， 屏 蔽电极信号一般为零伏。
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触摸屏。该显示装置可以为手机、 平板电脑、 电 视机、 显示器、 笔记本电脑、 数码相框、 导航仪等任何具有显示功能的产 品或部件。 该显示装置的实施可以参见上述电容式触摸屏的实施例， 重复 之处不再赘述。
本发明实施例提供的一种电容式触摸屏及显示装置，在对向基板背离液 晶层的一侧设置屏蔽电极、 触控驱动电极和触控感应电极； 其中， 触控驱动 电极、 触控感应电极和屏蔽电极之间相互绝缘； 触控驱动电极与触控感应电 极交叉排列； 屏蔽电极在对向基板上的正投影落入触控驱动电极和触控感应 电极交叉排列在对向基板上形成的正投影的间隙内， 即屏蔽电极与触控驱动 电极或触控感应电极在对向基板上的正投影互不重叠。通过通过减少屏蔽电 极与触控感应电极或触控驱动电极之间的正对面的方式， 降氏在该正对面处 形成的电容， 从而提高了触控感应的灵敏度， 增强了触控的准确性。 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、 一种电容式触摸屏， 包括： 阵列基板， 与所述阵列基板相对而置的 对向基板， 以及位于所述对向基板与所述阵列基板之间的液晶层， 其中 所述对向基板在背离所述液晶层的一侧设置有屏蔽电极、触控驱动电极 和触控感应电极； 其中，
所述触控驱动电极、 触控感应电极和屏蔽电极之间相互绝缘； 所述触控 驱动电极与所述触控感应电极交叉排列； 所述屏蔽电极在所述对向基板上的 正投影落入所述触控驱动电极和触控感应电极交叉排列在所述对向基板上 形成的正投影的间隙内。
2、 如权利要求 1 所述的电容式触摸屏， 其中， 所述触控驱动电极和所 述触控感应电极的延伸方向相互垂直。
3、 如权利要求 1或 2所述的电容式触摸屏， 其中， 任意相邻的两条触 控驱动电极之间的间隔相同； 任意相邻的两条触控感应电极之间的间隔相 同。
4、 如权利要求 1-3 任一项所述的电容式触摸屏， 其中， 所述触控驱动 电极与所述触控感应电极同层设置；
各所述触控驱动电极在与各所述触控感应电极的交叉处通过第一桥接 电极桥接， 或各所述触控感应电极在与各所述触控驱动电极的交叉处通过第 二桥接电极桥接。
5、 如权利要求 4所述的电容式触摸屏， 其中， 所述第一桥接电极与所 述屏蔽电极同层设置； 所述第二桥接电极与所述屏蔽电极同层设置。
6、 如权利要求 4或 5所述的电容式触摸屏， 其中， 各所述触控驱动电 极和各所述触控感应电极位于所述屏蔽电极与所述对向基板之间， 或位于所 述屏蔽电极背离所述对向基板的一侧。
7、 如权利要求 1-3 任一项所述的电容式触摸屏， 其中， 所述触控驱动 电极与所述屏蔽电极同层设置；
各所述触控驱动电极和各所述屏蔽电极位于所述触控感应电极与所述 对向基板之间， 或位于所述触控感应电极背离所述对向基板的一侧。
8、 如权利要求 1-3 任一项所述的电容式触摸屏， 其中， 所述触控感应 电极与所述屏蔽电极同层设置；
各所述触控感应电极和各所述屏蔽电极位于所述触控驱动电极与所述 对向基板之间， 或位于所述触控驱动电极背离所述对向基板的一侧。
9、 一种显示装置， 包括如权利要求 1-8任一项所述的电容式触摸屏。
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CN101581849A (zh) * 2009-06-23 2009-11-18 友达光电股份有限公司 触控式液晶显示面板及液晶显示面板
CN103353818A (zh) * 2013-06-27 2013-10-16 京东方科技集团股份有限公司 一种电容式触摸屏及显示装置

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