WO2014190672A1 - 阵列基板、触控面板及显示装置 - Google Patents

阵列基板、触控面板及显示装置 Download PDF

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Publication number
WO2014190672A1
WO2014190672A1 PCT/CN2013/086892 CN2013086892W WO2014190672A1 WO 2014190672 A1 WO2014190672 A1 WO 2014190672A1 CN 2013086892 W CN2013086892 W CN 2013086892W WO 2014190672 A1 WO2014190672 A1 WO 2014190672A1
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WIPO (PCT)
Prior art keywords
touch
array substrate
electrode
sensing
line
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Ceased
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PCT/CN2013/086892
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English (en)
French (fr)
Inventor
孙建
李付强
李成
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BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
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BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
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Priority to US14/345,050 priority Critical patent/US9310948B2/en
Publication of WO2014190672A1 publication Critical patent/WO2014190672A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—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

  • Embodiments of the present invention relate to an array substrate, a touch panel, and a display device. Background technique
  • the Touch Screen Panel With the rapid development of display technology, the Touch Screen Panel has gradually spread throughout people's lives. At present, the touch panel can be divided into resistive, capacitive, infrared, and surface acoustic wave according to the working principle. Capacitive touch panels are widely used in the industry for their true multi-point control and high sensitivity.
  • the capacitive touch screen can be divided into an external touch screen, a covered surface touch screen, and an embedded touch screen according to the composition.
  • the touch screen needs to be produced separately from the display, and then the two are brought together to form a touch-enabled LCD screen.
  • the external touch screen has the disadvantages of high production cost, low light transmittance, and thick module.
  • the in-cell touch screen embeds the touch screen's touch motor inside the LCD screen, which can reduce the overall thickness of the module and greatly reduce the manufacturing cost of the touch screen. Therefore, the in-cell touch screen is favored by major panel manufacturers.
  • FIG. 1A is a top view of a pixel unit in a conventional capacitive in-cell touch panel
  • FIG. 1B is an enlarged schematic view of the right pixel unit in FIG. 1A
  • FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1B.
  • the array substrate 10 of the conventional touch panel includes a plurality of gate lines 50 formed on the base substrate 11 , a plurality of data lines 60 , a plurality of second film transistors 20 , a plurality of first transistors 40 , and a touch sensing line 30 .
  • the touch scan line 80 and the sensing electrode 31 are touched.
  • the extending portion 301 and the sensing electrode 31 electrically connected to the touch sensing line 30 are located on the same layer, and the extending portion 301 of the touch sensing line 30 and the side end surface of the sensing electrode 31 are oppositely disposed to form a coupling capacitor.
  • the sensing electrode 31 is connected to the source 43 of the first transistor 40, and the touch scan line 80 is connected to the gate 41 and the drain 44 of the first transistor 40.
  • the touch When the operator touches the touch panel, the touch affects the capacitance between the touch sensing line 30 and the sensing electrode 31, so that the coupling capacitance of the operator touches the capacitance of the coupling capacitor at other positions. The amount is different.
  • the touch screen determines the position at which the operator touches the touch panel based on the position of the coupling capacitor whose received capacitance changes.
  • a disadvantage of the above conventional touch panel is that, as shown in FIG. 1B, the extension of the touch sensing line parallel to each other in the same plane and the coupling capacitance formed by the sensing electrode occupy a large detection unit area, and the coupling capacitance is due to the coupling capacitance.
  • the non-display area on the display screen reduces the aperture ratio of the touch panel, thereby affecting the brightness of the display device.
  • Embodiments of the present invention provide an array substrate, a touch panel, and a display device for improving the aperture ratio of the touch panel and thereby improving the brightness of the display device.
  • An aspect of the present invention provides an array substrate including a plurality of gate lines, a plurality of data lines, and a plurality of touch sensing units.
  • Each of the touch sensing units includes touch scan lines and touches that are interlaced with each other.
  • a sensing line, a first transistor, and a sensing electrode wherein the touch scan line is connected to a gate and a drain of the first transistor, and the sensing electrode is connected to a source of the first transistor;
  • the line and the sensing electrode are separated by an insulating layer and disposed on different layers and have overlapping regions.
  • Another aspect of the present invention also provides a touch panel including the above array substrate. Still another aspect of the present invention provides a display device including the above touch panel.
  • FIG. 1A is a top view of a pixel unit in a conventional capacitive in-cell touch panel, and FIG. 1B is an enlarged schematic view of the right touch unit in FIG. 1A;
  • Figure 2 is a cross-sectional view taken along line A-A' of Figure 1B;
  • FIG. 3A is a top view of a pixel unit in a touch panel according to an embodiment of the present invention
  • FIG. 3B is an enlarged schematic view of a pixel unit on the right side in FIG. 3A
  • FIG. 3C is a schematic diagram of a variation of the embodiment
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 3B;
  • FIG. 5 is a top plan view of a pixel unit in a touch panel according to another embodiment of the present invention
  • FIG. Figure 6 is a cross-sectional view of CC in Figure 5.
  • embodiments of the present invention provide an array substrate, a touch panel, and a display device, which reduce the non-display on the array substrate by using a vertically disposed coupling capacitor.
  • the area of the area increases the aperture ratio of the touch panel, thereby increasing the brightness of the display device.
  • FIG. 3A is a top view of a pixel unit in a touch panel according to an embodiment of the present invention
  • FIG. 3B is a 3A is an enlarged schematic view of the right pixel unit
  • FIG. 4 is a cross-sectional view taken along line BB of FIG. 3B.
  • An array substrate 10 provided by an embodiment of the present invention includes a plurality of gate lines 50 and data lines 60 formed on a base substrate 11, and the gate lines 50 and the data lines 60 cross each other to define pixel units of a plurality of display devices.
  • the array substrate 10 further includes a plurality of touch sensing units, each of which includes a touch scan line 80 and a touch sensing line 30, a first transistor 40, and a sensing electrode 31 that intersect each other.
  • each touch sensing unit is defined by touch scan lines 80 and touch sensing lines 30 that cross each other.
  • the gate line 50 and the touch scan line 80 are disposed in parallel with each other.
  • the gate line 50 is located below the touch scan line 80 as shown in FIG. 3A, the embodiment of the present invention is not limited thereto; similarly, the data line 60 and the touch sensor The lines 30 are disposed in parallel with each other, although the data line 60 is located on the left side of the touch sensing line 30 as shown in FIG. 3A, the embodiment of the present invention is not limited thereto.
  • the touch sensing unit does not need to correspond to the pixel unit, and one touch sensing unit can correspond to multiple pixel units. For example, one touch sensing unit can correspond to more than three pixel units.
  • the touch scan line 80 is electrically connected to the gate 41 and the drain 44 of the first transistor 40, and the sense electrode 31 is electrically connected to the source 43 of the first transistor 40.
  • the first transistor 40 includes a gate electrode 41, an active layer 42, a source electrode 43 and a drain electrode 44, and the gate electrode 41 and the active layer 42 are spaced apart by a gate insulating layer, as shown in Figs. 3A and 4.
  • the touch sensing line 30 and the sensing electrode 31 are disposed apart from each other by an insulating layer (insulating layered arrangement) and have overlapping regions, that is, the two overlap each other in a direction perpendicular to the base substrate 11.
  • the touch sensing line 30 and the sensing electrode 31 are spaced apart by the gate insulating layer 47.
  • the working principle of the array substrate provided by the embodiment of the present invention is as follows.
  • the touch sensing lines 30 disposed on the different layers and having overlapping regions separated from each other by the insulating layer form a coupling capacitance in the vertical direction with the sensing electrodes 31.
  • the touch scan line 80 is connected to the gate 41 and the drain 44 of the first transistor 40, and after the high-level signal is applied to the touch scan line 80, the conductive signal is turned on.
  • the channel between the source 43 and the drain 44 of a transistor 40 charges the sensing electrode 31, so that the coupling capacitance formed by the touch sensing line 30 and the sensing electrode 31 has a certain capacitance.
  • the touch sensing line 31 When the operator's finger or the stylus touches the touch screen, a capacitance is formed between the finger or the stylus and the sensing electrode 31, which in turn causes a change in the coupling capacitance between the touch sensing line 31 and the sensing electrode 31. In this way, the change of the total coupling capacitance can be detected through the touch sensing line 30, thereby determining the position of the touch. Since the vertical overlapping area of the touch sensing line 30 and the sensing electrode 31 forms a vertical coupling capacitance, and the coupling of the vertical arrangement per unit area The capacitance of the capacitor is greater than the capacitance of the coupling capacitors disposed in parallel. Therefore, the array substrate provided by the embodiment of the invention reduces the area of the non-display area on the array substrate while achieving the same sensitivity, and is improved compared with the conventional array substrate.
  • the aperture ratio of the touch panel increases the display brightness of the display device.
  • the touch sensing line 30 and the sensing electrode 31 having the vertical overlapping area have a large capacitance, and when the operator's finger or the stylus touches the touch panel of the display device, the coupling capacitor 30 The capacitance change is relatively large, so the coupling capacitor 30 has a more sensitive detection.
  • the sensing electrode 31 may further have an extending portion along the direction in which the touch sensing line 30 is disposed (ie, the length direction of the touch sensing line 30), thereby increasing the touch sensing line 30. The area of the overlap region with the sensing electrode 31 increases the capacitance of the formed coupling capacitor.
  • the array substrate further includes a plurality of pixel units, each of which includes a second transistor 20 and a pixel electrode 70, that is, the second transistor 20 controls charging and discharging of the pixel electrode 70.
  • the second transistor 20 includes a gate electrode 21, an active layer 22, a source electrode 23, and a drain electrode 24.
  • the gate 21 is electrically coupled to a respective gate line 50
  • the drain 24 is electrically coupled to a corresponding data line 60.
  • the pixel electrode 70 is electrically connected to the source 23 of the second transistor 20 through a via formed in the passivation layer 46.
  • the electrical connection structure of the second transistor 20 and the pixel electrode 70 is not limited to the example shown in the drawing.
  • the touch sensing line 30 and the sensing electrode 31 should be located on different layers of the array substrate.
  • the touch sensing line 30 can be disposed in parallel with the same layer of the data line 60, so that the touch sensing line 30 can be formed by the same masking process (patterning process) as the data line 60, thereby saving process cost; or,
  • the control sensing line 30 can be at least one of the data lines 60.
  • the functions of the touch sensing lines and the data lines are implemented by time division multiplexing, and the setting can further increase the aperture ratio of the touch panel.
  • the position of the sensing electrode 31 can be set at different positions, for example, the sensing electrode 31 can be insulated from the same layer as the pixel electrode 70, or the sensing electrode 31 can be insulated from the gate line 50.
  • the sensing electrode 31 can be formed simultaneously with the pixel electrode 70 or the gate line 50 in the same patterning process, which simplifies the fabrication process.
  • the sensing electrode 31 is disposed in the same layer as the gate 41 of the first transistor 40 (the gate electrode 41 and the gate line 50 are disposed in the same layer), and the same material can be used.
  • the material is formed in the same patterning process.
  • a gate insulating layer 47 is formed on the sensing electrode 31, and a touch sensing line 30 is formed on the gate insulating layer 47.
  • the passivation layer 46 covers the touch sensing line 30 and the gate insulating layer 47 at the gate.
  • the insulating layer 47 and the passivation layer 46 are provided with via holes respectively exposing the sensing electrode 31 and the drain electrode 43 of the first transistor 40.
  • the drain electrode 43 of the first transistor 40 is connected to the sensing electrode 31 through the transparent electrode layer 45, as described above.
  • Figure 4 shows.
  • the transparent electrode layer 45 can be formed, for example, in the same patterning process as the pixel electrode 70.
  • the factors affecting the coupling capacitance between the sensing electrode 31 and the touch sensing line 30 are mainly: the overlapping area between the sensing electrode 31 and the touch sensing line 30, the spacing between the sensing electrode 31 and the touch sensing line 30, And the dielectric constant of the dielectric between the two. Therefore, on the one hand, the sensing electrode 31 can be extended along the distribution direction of the touch sensing line 30, or the touch sensing line 30 extends in the direction of the touch electrode 31, or both can extend to increase the overlapping area. Increase the coupling capacitance to improve touch sensitivity.
  • the spacing between the sensing electrode 31 and the touch sensing line 30 can be reduced, that is, the thickness of the gate insulating layer 47 can be reduced to increase the coupling capacitance, and the touch sensitivity can be improved.
  • a different material of the gate insulating layer 47 can be selected to increase the coupling capacitance and improve the touch sensitivity.
  • the sensing electrode 31 in this embodiment may have an overlapping area with the touch sensing line 30, and the specific shape is not limited.
  • the sensing electrode may be a strip electrode, a square electrode, a T-type electrode or an L-type electrode.
  • the sensing electrode 31 is a square electrode.
  • the touch scan lines 80 may also be disposed in different manners.
  • the touch scan lines 80 may be separately formed on the array substrate 10, or at least one of the gate lines 50 may be used as a touch scan.
  • the function of the line 80, such as the touch scan line and the gate line, is implemented by time division multiplexing, and the modified example is shown in FIG. 3C. That is, in order to further increase the aperture ratio of the touch panel, the touch scan line 80 is shared with the gate line 50, so that the touch panel has a large aperture ratio.
  • FIG. 5 is a top view of a pixel unit in a touch panel according to another embodiment of the present invention
  • FIG. 6 is a cross-sectional view taken along line C-C' in FIG.
  • the array substrate 10 provided in this embodiment includes a plurality of gate lines 50 and data lines 60 formed on the base substrate 11, and the gate lines 50 and the data lines 60 cross each other to define pixel units of a plurality of display devices.
  • Each of the pixel units includes a second transistor 20 and a pixel electrode 70.
  • the array substrate 10 further includes a plurality of touch sensing units, each touch sensing unit including touches that cross each other The scanning line 80 and the touch sensing line 30, the first transistor 40, and the sensing electrode 31.
  • the touch scan line 80 is connected to the gate 41 and the drain 44 of the first transistor 40, and the sense electrode 31 is connected to the source 43 of the first transistor 40.
  • the first transistor 40 includes a gate 41, an active layer 42, a source 43 and a drain 44.
  • the sensing electrode 31 is disposed in the same layer as the pixel electrode 70, and is formed on the touch sensing line 30 and bluntly passed between the touch sensing line 30 and the touch sensing line 30.
  • the layers 46 are spaced apart and overlap each other in the vertical direction.
  • the sensing electrode 31 is electrically connected to the source 43 of the first transistor 40 through a via formed in the passivation layer 46.
  • the sensing electrode 31 can be formed, for example, in the same patterning process as the pixel electrode 70.
  • the functions of the touch sensing line and the data line are implemented by time division multiplexing, or the functions of the touch scan line and the gate line are implemented by time division multiplexing, which can further increase the touch.
  • the aperture ratio of the control panel is implemented by time division multiplexing, or the functions of the touch scan line and the gate line are implemented by time division multiplexing, which can further increase the touch.
  • the array substrate in order to improve the touch precision of the touch panel, for example, the array substrate
  • the 10 includes a plurality of pixel units, and at least two pixel units are correspondingly provided with one touch sensing unit.
  • a touch sensing unit is disposed corresponding to each adjacent three pixel units.
  • the touch sensing unit can detect the different positions where the finger touches the touch panel. Since the touch precision of the touch panel is in the order of millimeters, the number of the touch sensing units can be set by the manufacturer according to the requirements of the touch precision, and is not limited to one touch sensing unit corresponding to each of the adjacent three pixel units.
  • the array substrate 10 further includes a gate insulating layer 47 disposed between the gate 41 and the source 43 of the first transistor 40, and the gate insulating layer 47 is located at the touch Between the sensing line 30 and the sensing electrode 31.
  • the dielectric constant of the insulating material between the electrode plates directly affects the capacitance of the capacitor.
  • the gate insulating layer 47 disposed on the array substrate 10 increases the coupling capacitance formed by the overlapping regions of the touch sensing line 30 and the sensing electrode 31. The capacity, which improves the detection sensitivity of the touch panel.
  • the array substrate 10 further includes a passivation layer 46 disposed on the source 43 (23) and the drain 44 (24).
  • the added passivation layer 46 is located at the outermost surface of the array substrate 10, so that the source electrode 43, the drain electrode 44, and the touch sensing line 30 are protected by 4, which avoids scratches during the production process, thereby improving The quality of the array substrate 10 produced.
  • a touch panel provided by the embodiment of the invention includes any one of the above array substrate and the opposite substrate.
  • the array substrate and the opposite substrate are opposed to each other to form a liquid crystal cell, and the liquid crystal cell is filled with a liquid crystal material.
  • the opposite substrate is, for example, a color filter substrate, and the pixel unit on the array substrate includes Corresponding color film unit.
  • the touch panel has better detection sensitivity and a higher aperture ratio.
  • a display device includes any of the above touch panels, and has better display brightness.
  • the display device may be a display, a mobile phone, a television, a notebook, an all-in-one, etc., and other essential components of the display device are understood by those of ordinary skill in the art, and are not described herein, nor are they It should be construed as limiting the invention.

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Abstract

一种阵列基板、触控面板及显示装置。阵列基板（10）包括多条栅线（50）、数据线（60）和多个触控感应单元，每个触控感应单元包括触控扫描线（80）、触控感应线（30）、第一晶体管（40）以及感应电极（31），触控扫描线与第一晶体管的栅极（41）和漏极（44）连接，感应电极与第一晶体管的源极（43）连接；触控感应线与感应电极通过绝缘层分隔开在不同层上设置且具有交叠区域。阵列基板减小了阵列基板上非显示区域的面积，提高了触控面板的开口率，进而增加了显示装置的显示亮度。

Description

阵列基板、 触控面板及显示装置 技术领域
本发明的实施例涉及到一种阵列基板、 触控面板及显示装置。 背景技术
随着显示技术的飞速发展， 触控面板（Touch Screen Panel ) 已经逐渐遍 及人们的生活中。 目前， 触控面板按照工作原理可以分为电阻式、 电容式、 红外线式以及表面声波式。 电容式触控面板由于能够实现真正的多点控制和 高灵敏度而成被业内广泛应用。
电容触摸屏按组成结构可分为外挂式触摸屏、 覆盖表面式触摸屏以及内 嵌式触摸屏。 对于外挂式触摸屏， 需要将触摸屏与显示屏分开生产， 然后再 将二者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 成本高、 光透过率较低、 模组较厚等缺点。 内嵌式触摸屏将触摸屏的触控电 机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。 因此， 内嵌式触摸屏受到各大面板厂家青睐。
目前， 传统的电容式内嵌触摸屏采用两个平行的电极来形成电容。 当操 作者触摸触控面板时， 这两个电极交叉处的电容量改变， 于此通过该电容量 的变化可确定操作者触摸的屏幕的位置。
图 1A为传统的电容内嵌式触控面板中的像素单元的俯视图，图 1B为图 1A中右侧像素单元的放大示意图， 图 2为图 1B中 A-A，处的截面图。
该传统的触控面板的阵列基板 10包括形成在基底基板 11上的多条栅线 50、 多条数据线 60、 多个第二膜晶体管 20、 多个第一晶体管 40、 触控感应 线 30、 触控扫描线 80和感应电极 31。 与触控感应线 30电连接的延伸部分 301和感应电极 31位于同一层上， 且该触控感应线 30的延伸部分 301和感 应电极 31的侧端面相对设置从而形成耦合电容。 感应电极 31与第一晶体管 40的源极 43连接， 触控扫描线 80与第一晶体管 40的栅极 41和漏极 44连 接。 当操作者触摸到触控面板时，该触摸会影响到触控感应线 30和感应电极 31之间的电容量，使操作者触摸处的耦合电容与其他位置的耦合电容的电容 量不同。 触摸屏根据接收到的电容量发生变化的耦合电容的位置来确定操作 者触摸触控面板的位置。
上述传统的触控面板的缺陷在于， 如图 1B所示， 在同一平面内彼此平 行的触控感应线的延伸部分和感应电极形成的耦合电容需占用较大的探测单 元面积， 而且由于耦合电容位于显示屏上的非显示区域， 因此降低了触控面 板的开口率， 从而影响到显示装置的亮度。 发明内容
本发明的实施例提供了一种阵列基板、 触控面板及显示装置， 用以提高 触控面板的开口率， 进而提高显示装置的亮度。
本发明的一个方面提供了一种阵列基板， 其包括多条栅线、 多条数据线 和多个触控感应单元； 每个所述触控感应单元包括彼此交错的触控扫描线和 触控感应线、 第一晶体管以及感应电极， 所述触控扫描线与所述第一晶体管 的栅极和漏极连接， 所述感应电极与所述第一晶体管的源极连接； 所述触控 感应线与所述感应电极通过绝缘层分隔开在不同层上设置且具有交叠区域。
本发明的另一个方面还提供了一种触控面板， 其包括上述阵列基板。 本发明的再一个方面还提供了一种显示装置， 其包括上述触控面板。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 简单地介绍，显而易见地， 下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1A为传统的电容内嵌式触控面板中的像素单元的俯视图，图 1B为图 1A中右侧触控单元的放大示意图；
图 2为图 1B中 A-A'处的截面图；
图 3A为本发明一个实施例提供的触控面板中的像素单元的俯视图， 图 3B为图 3A中右侧像素单元的放大示意图， 图 3C为该实施例的一个变体的 示意图；
图 4为图 3B中 B-B，处的截面图；
图 5为本发明另一个实施例提供的触控面板中的像素单元的俯视图； 图 6为图 5中 C-C，处的截面图。
附图标记：
10-阵列基板 20-第二晶体管 30-触控感应线
31-感应电极 40-第一晶体管 41-栅极
42-有源层 43-源极 44-漏极
45-透明电极 46-钝化层 47-栅极绝缘层
50-栅线 60-数据线 70-像素电极
80-触控扫描线 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。本公开中使用的 "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" 、 "一" 或者 "该" 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 指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及 其等同， 而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。
为了提高触控面板的开口率， 进而提高显示装置的亮度， 本发明的实施 例提供了一种阵列基板、 触控面板和显示装置， 通过采用垂直设置的耦合电 容， 降低了阵列基板上非显示区域的面积， 提高了触控面板的开口率， 进而 提高了显示装置的亮度。
图 3A为本发明实施例提供的触控面板中的像素单元的俯视图，图 3B为 图 3A中右侧像素单元的放大示意图； 图 4为图 3B中 B-B，处的截面图。 本发明实施例提供的一种阵列基板 10包括形成在基底基板 11之上的多 条栅线 50和数据线 60, 这些栅线 50和数据线 60彼此交叉以界定了多个显 示装置的像素单元。该阵列基板 10还包括多个触控感应单元，每个触控感应 单元包括彼此交叉的触控扫描线 80和触控感应线 30、第一晶体管 40以及感 应电极 31。 或者说， 每个触控感应单元由彼此交叉的触控扫描线 80和触控 感应线 30界定。 栅线 50和触控扫描线 80彼此平行设置， 虽然如图 3A所示 栅线 50位于触控扫描线 80的下方， 但是本发明的实施例不限于此； 同样， 数据线 60和触控感应线 30彼此平行设置， 虽然如图 3A所示数据线 60位于 触控感应线 30的左侧 , 但是本发明的实施例不限于此。
而且， 触控感应单元无需与像素单元——对应， 可以一个触控感应单元 对应多个像素单元，例如，一个触控感应单元可以对应三个以上的像素单元。 触控扫描线 80与第一晶体管 40的栅极 41和漏极 44电连接， 感应电极 31 与第一晶体管 40的源极 43电连接。第一晶体管 40包括栅极 41、有源层 42、 源极 43和漏极 44, 栅极 41和有源层 42之间由栅绝缘层间隔开， 参见图 3A 和图 4所示。
触控感应线 30与感应电极 31通过绝缘层分开设置 （绝缘分层设置 )且 具有交叠区域， 即二者在垂直于基底基板 11的方向上彼此重叠。在本实施例 中， 触控感应线 30与感应电极 31由栅绝缘层 47间隔开。
本发明实施例提供的阵列基板的工作原理如下所述。
彼此通过绝缘层分隔开在不同层上设置且具有交叠区域的触控感应线 30与感应电极 31形成一个垂直方向上的耦合电容。 包含本实施例的阵列基 板的触摸屏在使用时， 触控扫描线 80与第一晶体管 40的栅极 41和漏极 44 连接， 在触控扫描线 80通入高电平信号后， 导通第一晶体管 40 中源极 43 和漏极 44之间的沟道，使感应电极 31带电，从而使触控感应线 30和感应电 极 31形成的耦合电容具有一定的电容量。在操作者的手指或触控笔触碰到触 摸屏时，手指或触控笔与感应电极 31之间形成电容，这进而导致触控感应线 31与感应电极 31之间的耦合电容出现变化。这样通过触控感应线 30可以检 测到总耦合电容的变化，进而确定触控的位置。 由于触控感应线 30与感应电 极 31的垂直交叠区域形成垂直耦合电容,且由于单位面积的垂直设置的耦合 电容的电容量大于平行设置的耦合电容的电容量， 因此， 本发明实施例提供 的阵列基板在达到相同灵敏度的同时减小了阵列基板上非显示区域的面积， 与传统的阵列基板相比提高了触控面板的开口率， 增加了显示装置的显示亮 度。
在上述实施例中， 具有垂直交叠区域的触控感应线 30和感应电极 31具 有较大的电容量， 当操作者的手指或触控笔触摸到显示装置的触控面板时， 耦合电容 30的电容量变化比较大， 因此耦合电容 30具有较灵敏的探测度。 进一步地， 为了提高形成的耦合电容的电容量， 感应电极 31 沿触控感应线 30的设置方向 （即触控感应线 30的长度方向） 可以进一步具有延伸部， 从 而增大触控感应线 30与感应电极 31之间的交叠区域的面积 , 提高了形成的 耦合电容的电容量。
在上述实施例中， 所述阵列基板还包括多个像素单元， 每个像素单元包 括第二晶体管 20以及像素电极 70, 即由第二晶体管 20控制对像素电极 70 的充放电。 如图 4所示， 第二晶体管 20包括栅极 21、 有源层 22、 源极 23 和漏极 24。 该栅极 21与相应的栅线 50电连接， 漏极 24与相应的数据线 60 电连接。像素电极 70通过形成在钝化层 46中的过孔与第二晶体管 20的源极 23电连接。第二晶体管 20与像素电极 70的电连接结构不限于图中示出的示 例。
触控感应线 30和感应电极 31为了形成垂直方向上的耦合电容， 触控感 应线 30和感应电极 31应位于阵列基板的不同层上。 如图 3A所示， 触控感 应线 30可以与数据线 60同层平行设置， 这样触控感应线 30可以与数据线 60同一次掩膜工艺（构图工艺）形成， 节省工艺成本； 或者， 触控感应线 30 可以为数据线 60中的至少一条，例如触控感应线和数据线的功能通过分时复 用的方式实现， 这种设置可进一步增大触控面板的开口率。
感应电极 31的设置位置可以在不同的位置， 例如感应电极 31可以与像 素电极 70同层绝缘设置，或感应电极 31可以与栅线 50同层绝缘设置。这样 感应电极 31可以与像素电极 70或栅线 50在同一构图工艺中同时形成，简化 了制备工艺。
例如， 在图 4所示的示例性结构中， 感应电极 31与第一晶体管 40的栅 极 41 (栅极 41与栅线 50是同层设置的） 同层设置， 二者可以采用相同的材 料在同一构图工艺中形成。 在感应电极 31上形成有栅极绝缘层 47 , 栅极绝 缘层 47上形成有触控感应线 30, 钝化层 46覆盖在触控感应线 30和栅极绝 缘层 47之上，在栅极绝缘层 47和钝化层 46上设置过孔，分别露出感应电极 31和第一晶体管 40的漏极 43,第一晶体管 40的漏极 43通过透明电极层 45 与感应电极 31相连接， 具体如图 4所示。 该透明电极层 45例如可以与像素 电极 70在同一构图工艺中形成。
影响感应电极 31和触控感应线 30之间耦合电容大小的因素主要有： 感 应电极 31和触控感应线 30之间的交叠面积， 感应电极 31和触控感应线 30 之间的间距， 以及二者之间的电介质的介电常数。 因此， 一方面， 可以通过 使感应电极 31 沿触控感应线 30的分布方向进行延伸， 或者触控感应线 30 向触控电极 31的方向延伸，或者两者相互延伸来增大交叠面积，提高耦合电 容， 进而提高触控灵敏度。 另一方面， 可以减小感应电极 31 和触控感应线 30之间的间距， 即减小栅极绝缘层 47的厚度来增大耦合电容， 提高触控灵 敏度。 另外， 还可以选用不同材质的栅绝缘层 47来增大耦合电容， 提高触控 灵敏度。
需要说明的是， 本实施例中的感应电极 31只要满足与触控感应线 30具 有交叠面积即可， 具体形状不限。 例如， 感应电极可以是条形电极、 方形电 极、 T型电极或者 L型电极， 在图 3B所示的示范性结构中， 该感应电极 31 为方形电极。
在上述实施例中， 触控扫描线 80也可以釆用不同的方式设置， 例如， 可 以在阵列基板 10上单独形成触控扫描线 80，也可将栅线 50中的至少一条作 为触控扫描线 80， 例如触控扫描线和栅线的功能通过分时复用的方式实现， 该修改后的示例如图 3C所示。 也即， 为了进一步提高触控面板的开口率， 触控扫描线 80与栅线 50共用， 可使触控面板具有较大的开口率。
图 5为本发明另一实施例提供的触控面板中的像素单元的俯视图； 图 6 为图 5中 C-C'处的截面图。
同样， 该实施例提供的阵列基板 10包括形成在基底基板 11之上的多条 栅线 50和数据线 60, 这些栅线 50和数据线 60彼此交叉以界定了多个显示 装置的像素单元， 每个像素单元包括第二晶体管 20以及像素电极 70。 该阵 列基板 10还包括多个触控感应单元，每个触控感应单元包括彼此交叉的触控 扫描线 80和触控感应线 30、 第一晶体管 40以及感应电极 31。 触控扫描线 80与第一晶体管 40的栅极 41和漏极 44连接，感应电极 31与第一晶体管 40 的源极 43连接。第一晶体管 40包括栅极 41、有源层 42、源极 43和漏极 44。
该实施例与图 3B和图 4所示的实施例的区别在于， 感应电极 31与像素 电极 70同层设置，并且形成在触控感应线 30之上，与触控感应线 30之间通 过钝化层 46间隔开且在垂直方向上彼此重叠。 感应电极 31通过形成在钝化 层 46中的过孔与第一晶体管 40的源极 43电连接。 如此， 该感应电极 31例 如可以与像素电极 70在同一构图工艺中形成。
该实施例中， 同样， 触控感应线和数据线的功能通过分时复用的方式实 现， 或者触控扫描线和栅线的功能通过分时复用的方式实现， 这可进一步增 大触控面板的开口率。
在上述实施例中， 为了提高触控面板的触摸精度， 例如， 所述阵列基板
10包括多个像素单元， 至少两个像素单元对应设置有一个触控感应单元。 例 如， 每相邻三个像素单元对应设置有一个触控感应单元。 从而使触控感应单 元能够探测到手指触摸到触控面板的不同位置。 由于触控面板的触摸精度为 毫米级别， 因此生产者可以根据触摸精度的要求来自行设置触控感应单元的 个数， 不仅限于上述每相邻的三个像素单元对应一个触控感应单元。
在上述实施例中， 所述阵列基板 10还包括设置于所述第一晶体管 40的 栅极 41和源极 43之间的栅极绝缘层 47, 且所述栅极绝缘层 47位于所述触 控感应线 30和感应电极 31之间。 电极板之间绝缘材料的介电常数直接影响 到电容的电容量， 在阵列基板 10上设置的栅极绝缘层 47提高了触控感应线 30和感应电极 31交叠区域形成的耦合电容的电容量， 从而提高了触控面板 的探测灵敏度。
在上述实施例中， 所述阵列基板 10还包括设置于所述源极 43 ( 23 ) 、 漏极 44 ( 24 )之上的钝化层 46。 增加的钝化层 46位于所述阵列基板 10的最 外面， 从而使源极 43、 漏极 44、 触控感应线 30得到 4艮好的保护， 避免了在 生产过程中被划伤， 提高了生产出的阵列基板 10的质量。
本发明实施例提供的一种触控面板， 包括上述任一种阵列基板和对置基 板。 阵列基板与对置基板彼此对置以形成液晶盒， 在液晶盒中填充有液晶材 料。 该对置基板例如为彩膜基板， 该彩膜基板上包括与阵列基板上像素单元 对应的彩膜单元。 该触控面板具有较佳的探测灵敏度以及更高的开口率。 本发明实施例提供的一种显示装置， 包括上述任一种触控面板， 具有较 佳的显示亮度。 该显示装置可以是显示器、 手机、 电视、 笔记本、 一体机等， 对于显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该理 解具有的， 在此不做赞述， 也不应作为对本发明的限制。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种阵列基板， 包括多条栅线、 多条数据线、 多个触控感应单元， 其 中， 每个所述触控感应单元包括彼此交错的触控扫描线和触控感应线、 第一 晶体管以及感应电极，所述触控扫描线与所述第一晶体管的栅极和漏极连接， 所述感应电极与所述第一晶体管的源极连接；
所述触控感应线与所述感应电极通过绝缘层分隔开在不同层上设置且具 有交叠区域。
2、如权利要求 1所述的阵列基板， 其中， 所述触控感应线与所述数据线 同层且平行设置。
3、如权利要求 1或 2所述的阵列基板，还包括多个由彼此交错的栅线和 数据线界定的像素单元， 每个所述像素单元包括像素电极， 所述感应电极与 所述像素电极同层绝缘设置。
4、如权利要求 1或 2所述的阵列基板， 其中， 所述感应电极与所述栅线 同层绝缘设置。
5、 如权利要求 1-4任一所述的阵列基板， 其中， 多条所述栅线中的至少 一条为所述触控扫描线。
6、 如权利要求 1-5任一所述的阵列基板， 其中， 至少两个所述像素单元 对应设置有一个所述触控感应单元。
7、如权利要求 6所述的阵列基板， 其中， 每相邻的三个所述像素单元对 应设置有一个所述触控感应单元。
8、 如权利要求 1-7任一所述的阵列基板， 其中， 所述感应电极为条形电 极、 方形电极、 T型电极或者 L型电极。
9、 一种触摸面板， 包括如权利要求 1~8任一项所述的阵列基板。
10、 一种显示装置， 包括如权利要求 9所述的触控面板。
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