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WO2015180288A1 - 内嵌式触控面板及显示装置 - Google Patents

内嵌式触控面板及显示装置 Download PDF

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Publication number
WO2015180288A1
WO2015180288A1 PCT/CN2014/086072 CN2014086072W WO2015180288A1 WO 2015180288 A1 WO2015180288 A1 WO 2015180288A1 CN 2014086072 W CN2014086072 W CN 2014086072W WO 2015180288 A1 WO2015180288 A1 WO 2015180288A1
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WO
WIPO (PCT)
Prior art keywords
touch
touch driving
electrode
touch panel
electrodes
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PCT/CN2014/086072
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English (en)
French (fr)
Inventor
刘英明
董学
王海生
丁小梁
杨盛际
赵卫杰
任涛
刘红娟
邓立广
段亚锋
Original Assignee
京东方科技集团股份有限公司
北京京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, 北京京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
Publication of WO2015180288A1 publication Critical patent/WO2015180288A1/zh

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    • 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

Definitions

  • At least one embodiment of the present invention is directed to an in-cell touch panel and display device.
  • Touch panels for touch input are widely used in televisions, cell phones, portable terminals, and other display devices.
  • the in-cell scheme in which the touch electrodes are embedded in the display screen can not only reduce the thickness of the module as a whole, but also reduce the manufacturing cost of the touch panel, and is valued by major manufacturers.
  • the in-cell touch panel includes an array substrate 10 and a color filter substrate 20 disposed opposite to the array substrate 10 .
  • the color filter substrate 20 has a plurality of touch sensing electrodes 21 thereon.
  • the array substrate 10 has a common electrode layer 11 including a plurality of touch driving electrodes 12 and a plurality of common electrodes 13 disposed at intersections. As shown in FIG.
  • each of the common electrode 13 and the touch sensing electrode 21 is a strip electrode extending in the second direction Y, and the touch sensing electrode 21 is located above each common electrode 13; the touch driving electrode 12 is along the first direction.
  • the X extends and includes a plurality of block-shaped touch driving sub-electrodes electrically connected through the touch driving signal line 14, such as the touch driving sub-electrodes 12a, 12b, 12c, and 12d shown in FIG.
  • At least one embodiment of the present invention provides an in-cell touch panel and a display device for improving the screen display of the two portions caused by the inconsistency between the touch drive electrodes and the common electrodes in the in-cell touch panel. Uneven phenomenon.
  • At least one embodiment of the present invention provides an in-cell touch panel including an array substrate including a common electrode layer thereon, and disposed on the common electrode layer and insulated from the common electrode layer
  • the in-cell touch panel further includes a touch sensing electrode, and the touch driving electrode is cross-insulated with the touch sensing electrode.
  • At least one embodiment of the present invention also provides a display device including the above-described in-cell touch panel.
  • 1 is a plan view showing a touch sensing electrode and a common electrode layer of an in-cell touch panel
  • Figure 2 shows a cross-sectional view along line A-A in Figure 1;
  • FIG. 3 is a schematic plan view showing a touch driving electrode and a common electrode layer of a touch panel according to an embodiment of the invention
  • Figure 4 shows a cross-sectional view along line B-B in Figure 3;
  • FIG. 5 shows a plan view of an array substrate in accordance with an embodiment of the present invention.
  • FIG. 3 is a plan view showing a touch driving electrode and a common electrode layer of a touch panel according to an embodiment of the present invention
  • FIG. 4 is a cross-sectional view taken along line B-B of FIG.
  • the in-cell touch panel structure is different from the common electrode and the touch driving electrode in the in-cell touch panel structure shown in FIG. 1 and FIG. 2
  • the in-cell touch panel according to the embodiment of the invention is different.
  • the common electrode layer is not divided so that the original function of the common electrode layer is not changed.
  • the in-cell touch panel includes an array substrate 10 including a common electrode layer 11 and a plurality of sets of touch driving electrodes disposed on the common electrode layer 11 and insulated from the common electrode layer 11. 12.
  • the in-cell touch panel further includes a touch sensing electrode 21, and the touch driving electrode 12 and the touch sensing electrode 21 are cross-insulated.
  • the in-cell touch panel includes an array substrate 10 and a color filter substrate 20 disposed opposite the array substrate 10, and a liquid crystal layer is interposed between the array substrate 10 and the color filter substrate 20, and passes through the pair of boxes.
  • the process pairs the boxes together to form a touch panel.
  • the color film substrate 20 is provided with a plurality of sets of touch sensing electrodes 21, the array substrate 10 is provided with a common electrode layer 11, the common electrode layer 11 is provided with an insulating layer 15, and the insulating layer 15 is provided with a plurality of sets of touch driving electrodes 12 And the touch driving electrode 12 is disposed to cross the touch sensing electrode 21 .
  • the touch sensing electrodes are not necessarily disposed on the color filter substrate, and may be disposed on the array substrate as long as they are not in contact with the touch driving electrodes.
  • the intersection of the touch driving electrode 12 and the touch sensing electrode 21 is such that the mutual capacitance of the edge is large and the capacitance is small, thereby improving the touch sensitivity.
  • each group of touch driving electrodes 12 extends in a first direction X
  • the touch driving electrodes 12 include a plurality of touch driving sub-electrodes T x having the same size and shape connected by the touch driving signal lines 14 , or It is said that each set of touch driving electrodes 12 is divided into a plurality of touch driving sub-electrodes T x having the same size and shape along the first direction X.
  • Each set of touch sensing electrodes 21 extends in a second direction Y that is perpendicular to the first direction X.
  • the first direction X may coincide with a direction of a data line on the array substrate
  • the second direction Y coincides with a direction of a gate line on the array substrate.
  • the touch driving sub-electrode Tx is disposed between the projections of the two adjacent touch sensing electrodes 21 on the array substrate 10, such that the touch driving electrodes 12 and the touch sensing electrodes 21 are in the array. There is no overlap between the projections on the substrate 10, thereby increasing the mutual capacitance of the edges, further improving the touch sensitivity.
  • the size and shape of each of the touch driving sub-electrodes T x are the same.
  • each of the touch driving sub-electrodes T x may have a width of 4 mm to 6 mm.
  • the spacing between adjacent two touch driving sub-electrodes T x may be 4 ⁇ m to 8 ⁇ m.
  • the projection of the touch sensing electrode 21 on the array substrate 10 is located between two adjacent columns of touch driving electrodes 12.
  • the touch protection electrode 12 may further be provided with an electrode protection layer 16 .
  • the electrode protection layer 16 may be formed in the same layer as the pixel electrode layer 17 and not connected to the pixel. Since the pixel electrode layer 17 is usually formed of a material such as ITO or IGZO, the electrode protection layer 16 is disposed on the touch driving electrode 12 to prevent the touch driving electrode 12 from being oxidized, so that the process stability is better, and to some extent, Reduced resistance. Those skilled in the art can understand that it can also be While the pixel electrode layer 17 is formed, the pixel electrode layer 17 is also formed as a protective layer on other electrode layers or pads. For example, the pixel electrode layer 17 is formed as a protective layer on the pad of the edge region of the touch panel, so that Prevent the electrode or pad from oxidizing while reducing the resistance of the electrode or pad.
  • the same row of touch driving sub-electrodes T x are electrically connected by at least one touch driving signal line 14 , and the touch driving signal lines 14 extend along the first direction X.
  • the touch driving signal line 14 is formed in the same layer as the touch driving electrode 12, the touch driving signal line 14 is connected to the adjacent touch driving sub-electrode T x , and the touch driving signal line 14 is
  • the touch sensing electrode 21 is insulated, for example, a via is disposed at a position corresponding to the touch sensing electrode 21, and the adjacent touch driving sub-electrode passes through the via and the lower layer of the touch sensing electrode
  • the metal layer is connected to the touch driving signal line, which not only reduces the number of process steps, but also helps to narrow the frame of the touch panel.
  • touch driving signal lines are not limited to one, and the same row of touch driving sub-electrodes may be electrically connected through a plurality of touch driving signal lines.
  • the touch driving electrode 12 can access the common electrode signal without touching.
  • the touch driving electrode 12 can be made of a transparent conductive material such as ITO, and can be formed, for example, in the same layer as the pixel electrode layer 17. Of course, in order to improve the conductivity and reduce the load of the touch driving electrodes, the screens of the touch driving electrode portion and the common electrode portion are unified.
  • the touch driving electrodes 12 may be made of a metal material.
  • the pattern of the touch driving sub-electrode T x may be in a grid shape, that is, through the horizontal and vertical A grid structure formed by intersecting wires. In one embodiment, each of the grids is equal in shape and size, as shown in FIG.
  • each touch driving sub-electrode T x is specifically described below.
  • Figure 5 shows a schematic plan view of an array substrate.
  • the wire pattern in the first direction X and the projection of the data line on the array substrate corresponds to the position of the projection of the gate line on the array substrate, thereby being formed above the array substrate, as shown by the thick solid line in FIG.
  • the metal mesh pattern can increase the edge electric field between each touch driving sub-electrode Tx and the touch sensing electrode 21, and can also prevent the touch driving sub-electrode Tx from being short-circuited with the pixel electrode.
  • At least one embodiment of the present invention further provides a display device comprising any of the in-cell touch panels as described above.
  • the display device can be a mobile phone, a tablet computer, a television, and a display Any product or component that has a display function, such as a display, a notebook, a digital photo frame, and a navigator.
  • the in-cell touch panel and the display device can not only effectively improve the load of the touch driving electrode and the common electrode, thereby improving the image quality, and effectively increasing the relationship between the touch sensing electrode and the touch driving electrode.
  • the mutual capacitance of the edge reduces the positive capacitance and improves the touch sensitivity.

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

Abstract

一种内嵌式触控面板及显示装置，该触控面板包括阵列基板（10），所述阵列基板（10）上包括公共电极层（11）、设置在所述公共电极层（11）上且与所述公共电极层（11）绝缘的多组触控驱动电极（12）。所述内嵌式触控面板还包括触控感应电极（21），所述触控驱动电极（12）与所述触控感应电极（21）交叉绝缘设置。

Description

内嵌式触控面板及显示装置 技术领域
本发明的至少一个实施例涉及一种内嵌式触控面板及显示装置。
背景技术
用于触控输入的触控面板广泛用于电视机、手机、便携终端及其它显示装置中。将触控电极内嵌于显示屏内部的嵌入式(In-cell)方案，既可以减薄模组整体的厚度，又可以降低触控面板的制作成本，受到各大厂商的重视。
图1示出了一种内嵌式触控面板的触控感应电极和公共电极层的平面示意图，图2示出了沿图1中的线A-A的截面图。如图2所示，内嵌式触控面板包括阵列基板10和与阵列基板10相对设置的彩膜基板20。彩膜基板20上具有多个触控感应电极21，阵列基板10上具有包括交叉设置的多个触控驱动电极12和多个公共电极13的公共电极层11。如图1所示，各公共电极13和触控感应电极21为沿第二方向Y延伸的条状电极，且触控感应电极21位于各公共电极13上方；触控驱动电极12沿第一方向X延伸，并且包括通过触控驱动信号线14电相连的多个块状触控驱动子电极，例如图1中所示的触控驱动子电极12a、12b、12c、12d。
发明内容
本发明的至少一个实施例提供了一种内嵌式触控面板及显示装置，以改善因内嵌式触控面板中的触控驱动电极与公共电极的负载不一致造成的这两部分的画面显示不均的现象。
本发明的至少一个实施例提出了一种内嵌式触控面板，其包括阵列基板，所述阵列基板上包括公共电极层、及设置在所述公共电极层上且与所述公共电极层绝缘的多组触控驱动电极，所述内嵌式触控面板还包括触控感应电极，所述触控驱动电极与所述触控感应电极交叉绝缘设置。
本发明的至少一个实施例还提出了一种显示装置，其包括上述内嵌式触控面板。
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1示出了一种内嵌式触控面板的触控感应电极和公共电极层的平面示意图；
图2示出了沿图1中的线A-A的截面图；
图3示出了根据本发明实施例的触控面板的触控驱动电极和公共电极层的平面示意图；
图4示出了沿图3中的线B-B的截面图；
图5示出了根据本发明实施例的阵列基板的平面示意图。
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。
本申请的发明人注意到，在图1和图2所示的情形中，内嵌式触控面板中的触控驱动电极12与公共电极13的负载不一致，使得这两部分的画面显示不均，这影响了画面品质；且触控驱动电极12的负载较大，触控信号远端不容易实现触控功能。
图3示出了根据本发明实施例的触控面板的触控驱动电极和公共电极层的平面示意图，图4示出了沿图3中的线B-B的截面图。如图4所示，与图1和图2所示的内嵌式触控面板结构中将公共电极层分割为公共电极和触控驱动电极不同，根据本发明实施例的内嵌式触控面板不分割公共电极层，从而不改变公共电极层的原本功能。根据本发明至少一个实施例的内嵌式触控面板包括阵列基板10，阵列基板10上包括公共电极层11及设置在公共电极层11上且与公共电极层11绝缘的多组触控驱动电极12。该内嵌式触控面板还包括触控感应电极21，触控驱动电极12与触控感应电极21交叉绝缘设置。
例如，根据本发明实施例的内嵌式触控面板包括阵列基板10和与阵列基板10相对设置的彩膜基板20，阵列基板10与彩膜基板20中间夹置有液晶层，并通过对盒工艺对盒在一起，从而形成触控面板。彩膜基板20上设置有多组触控感应电极21，阵列基板10上设置有公共电极层11，公共电极层11上设置有绝缘层15，绝缘层15上设置有多组触控驱动电极12，并且触控驱动电极12与触控感应电极21交叉设置。图4仅示例性地说明本发明的实施例，而并非对本发明进行任何限制。本领域技术人员应当理解，触控感应电极不一定设置在彩膜基板上，也可以将其设置在阵列基板上，只要不与触控驱动电极接触即可。触控驱动电极12与触控感应电极21的交叉设置使得边缘互电容较大且正对电容较小，从而提高了触控灵敏度。
从图3可以更清楚的看出根据本发明的实施例的内嵌式触控面板的公共电极层和触控驱动电极的图案。如图3所示，各组触控驱动电极12沿第一方向X延伸，触控驱动电极12包括通过触控驱动信号线14连接的多个大小形状相同的触控驱动子电极Tx，或者说每组触控驱动电极12沿第一方向X被分隔为多个大小形状相同的触控驱动子电极Tx。各组触控感应电极21沿与第一方向X垂直的第二方向Y延伸。在一个实施例中，所述第一方向X可以与阵列基板上的数据线的方向一致，所述第二方向Y与阵列基板上的栅线的方向一致。
在一个实施例中，触控驱动子电极Tx设置在与其相邻的两组触控感应电极21在阵列基板10上的投影之间，这使得触控驱动电极12与触控感应电极21在阵列基板10上的投影之间不存在交叠，从而增大了边缘互电容，进一步提升了触控灵敏度。各个触控驱动子电极Tx的大小形状相同。在一个实施例中，每个触控驱动子电极Tx的宽度可以为4mm至6mm。在一个实施例中，相邻两个触控驱动子电极Tx之间的间距可以为4μm至8μm。触控感应电极21在阵列基板10上的投影位于相邻两列触控驱动电极12之间。
在一个实施例中，触控驱动电极12上还可以设置有电极保护层16。例如，该电极保护层16可以与像素电极层17同层制作，且与像素不连接。由于像素电极层17通常采用ITO、IGZO等材料形成，在触控驱动电极12上设置有电极保护层16可以防止触控驱动电极12被氧化，使得工艺稳定性更好，并且在一定程度上也降低了电阻。本领域技术人员可以理解，也可以在 形成像素电极层17的同时，在其他电极层或焊盘上也形成像素电极层17作为保护层，例如在触控面板的边缘区域的焊盘上形成像素电极层17作为保护层，从而可以在防止电极或焊盘氧化的同时，降低电极或焊盘的电阻。
在图3中，同一行触控驱动子电极Tx通过至少一根触控驱动信号线14电相连，该触控驱动信号线14沿第一方向X延伸。在一个实施例中，触控驱动信号线14与触控驱动电极12同层制备，触控驱动信号线14连接相邻的触控驱动子电极Tx，且所述触控驱动信号线14与所述触控感应电极21绝缘设置，例如，与所述触控感应电极21相对应的位置设置过孔，相邻的触控驱动子电极通过所述过孔、所述触控感应电极下层对应的金属层与触控驱动信号线连接，这样不仅可以减少工艺步骤，还有利于使触控面板的边框更窄。本领域技术人员应当理解，触控驱动信号线不限于一根，也可以是同一行触控驱动子电极通过多根触控驱动信号线电连接。在一个实施例中，触控驱动电极12在不触控的情况下，可以接入公共电极信号。
触控驱动电极12可以采用ITO等透明导电材料制作，例如可以与像素电极层17同层制作。当然，为了提高导电能力、降低触控驱动电极的负载，以使触控驱动电极部分与公共电极部分的画面统一，在一个实施例中，触控驱动电极12可以采用金属材料制成。在触控驱动电极12采用金属材料制成的情况下，为了不影响显示面板的透光性，在一个实施例中，触控驱动子电极Tx的图案可以采用网格状，即通过横纵交叉设置的导线形成的网格结构。在一个实施例中，所述每个网格的形状和尺寸大小相等，如图3所示。
下面具体描述每个触控驱动子电极Tx的金属网格图案。图5示出了阵列基板的平面示意图。在一个实施例中，为了不影响显示面板的透光性，对于每个触控驱动子电极Tx而言，其第一方向X上的导线图形可以与数据线在所述阵列基板上的投影的位置相对应，其第二方向Y上的导线图形与栅线在所述阵列基板上的投影的位置相对应，由此可以形成位于阵列基板上方的、如图5中的粗实线所示的金属网格图案，这样可以增加每个触控驱动子电极Tx与触控感应电极21之间的边缘电场，同时还可以防止触控驱动子电极Tx与像素电极短路。
本发明的至少一个实施例进一步提供了一种显示装置，其包括如上所述的任一种内嵌式触控面板。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。
根据本发明实施例的内嵌式触控面板及显示装置，不仅能够有效改善触控驱动电极与公共电极的负载，从而提高画质，还能够有效增加触控感应电极与触控驱动电极之间的边缘互电容，降低正对电容，提高触控灵敏度。
虽然结合附图描述了本发明的实施方式，但是本领域技术人员可以在不脱离本发明的精神和范围的情况下作出各种修改和变型，这样的修改和变型均落入由所附权利要求所限定的范围之内。
本申请要求于2014年5月30日递交的中国专利申请第201410239524.6号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (13)

  1. 一种内嵌式触控面板，包括：
    阵列基板，其中，所述阵列基板包括公共电极层、及设置在所述公共电极层上且与所述公共电极层绝缘的多组触控驱动电极；以及
    触控感应电极，所述触控驱动电极与所述触控感应电极交叉绝缘设置。
  2. 根据权利要求1所述内嵌式触控面板，其中各组所述触控驱动电极沿第一方向延伸，各组所述触控感应电极沿与所述第一方向垂直的第二方向延伸，且每组所述触控驱动电极沿所述第一方向被分隔为多个大小形状相同的触控驱动子电极。
  3. 根据权利要求2所述内嵌式触控面板，其中所述触控驱动子电极设置在与其相邻的两组所述触控感应电极在所述阵列基板上的投影之间。
  4. 根据权利要求2或3所述内嵌式触控面板，其中各个所述触控驱动子电极的宽度为4mm至6mm。
  5. 根据权利要求2-4任一所述内嵌式触控面板，其中相邻两个所述触控驱动子电极之间的间距为4μm至8μm。
  6. 根据权利要求2-5任一所述内嵌式触控面板，其中各个所述触控驱动子电极设置为金属网格图案。
  7. 根据权利要求6所述内嵌式触控面板，其中所述金属网格图案在所述第一方向上的图形与数据线在所述阵列基板上的投影的位置相对应，在所述第二方向上的图形与栅线在所述阵列基板上的投影的位置相对应。
  8. 根据权利要求2-7任一所述内嵌式触控面板，其中同一行所述触控驱动子电极通过至少一根触控驱动信号线电相连。
  9. 根据权利要求8所述内嵌式触控面板，其中所述触控驱动信号线与所述触控驱动电极同层制作，且所述触控驱动信号线与所述触控感应电极绝缘设置。
  10. 根据权利要求1-9任一所述内嵌式触控面板，还包括设置在所述触控驱动电极上的电极保护层。
  11. 根据权利要求10所述内嵌式触控面板，其中所述电极保护层与所述阵列基板的像素电极层同层制作，且与所述像素电极层不连接。
  12. 根据权利要求1-11中任一项所述内嵌式触控面板，其中所述触控驱动电极采用透明导电材料或金属材料制作。
  13. 一种显示装置，包括根据权利要求1-12中任一项所述的内嵌式触控面板。
PCT/CN2014/086072 2014-05-30 2014-09-05 内嵌式触控面板及显示装置 WO2015180288A1 (zh)

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