WO2020000896A1 - 触摸屏及其触控面板的电极引线结构 - Google Patents

触摸屏及其触控面板的电极引线结构 Download PDF

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Publication number
WO2020000896A1
WO2020000896A1 PCT/CN2018/118469 CN2018118469W WO2020000896A1 WO 2020000896 A1 WO2020000896 A1 WO 2020000896A1 CN 2018118469 W CN2018118469 W CN 2018118469W WO 2020000896 A1 WO2020000896 A1 WO 2020000896A1
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touch panel
conductive
circuit board
flexible circuit
electrode lead
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PCT/CN2018/118469
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English (en)
French (fr)
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马正
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广州视源电子科技股份有限公司
广州视睿电子科技有限公司
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Publication of WO2020000896A1 publication Critical patent/WO2020000896A1/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
    • 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

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  • the invention relates to the technical field of touch display, in particular to an electrode lead structure of a touch screen and a touch panel thereof.
  • Touch screens are widely used input and display devices in electronic devices today. With the development of touch display technology, the use of large-sized touch screens is becoming more and more common. In the manufacture of traditional touch screens, the electrodes of the touch display area are led out by laser etching the electrode channels in the edge area. This technology has a good effect on the production of small-sized touch screens. For 43-inch or 55-inch touch screen products, the channels to be etched are too long, and the channels need to be cleaned strictly to prevent short circuits. The production cost is high, and even if there are strict cleaning processes, channel-to-channel often occurs. In the case of a short circuit, it is difficult to improve the yield of the product.
  • An electrode lead structure of a touch panel is provided with a flexible circuit board at an edge of a display area of the touch panel.
  • the flexible circuit board has a conductive channel penetrating along a thickness direction thereof, and the flexible circuit board corresponds to the conductive channel.
  • a conductive pad is provided at a position, and a lead wire electrically connected to the conductive pad is also provided on the flexible circuit board.
  • the conductive channel is filled with a conductive pattern layer for connecting the display area of the touch panel with the conductive pattern layer.
  • the conductive pad layer is directly and electrically connected to the cured conductive paste layer.
  • the flexible circuit board includes a connecting portion and a lead-out portion
  • the connecting portion is provided at an edge of the display area and extends along the edge
  • the lead-out portion is connected to the connecting portion and extends toward the connecting portion.
  • the connecting portion is provided with a plurality of the conductive channels and a plurality of the conductive pads, and each of the lead-out portions leads to a plurality of lead-out wires.
  • the flexible circuit board is a single-sided conductive flexible circuit board, and the conductive pads and the lead wires are located on the same side of the flexible circuit board.
  • a side of the flexible circuit board on which the conductive pad is provided faces the touch panel.
  • the conductive channel is a through-hole structure or a U-shaped through-groove structure.
  • the conductive pattern layer is a nano silver wire layer; the conductive pad is a copper pad; and the lead-out wire is a copper wire.
  • the solidified conductive paste layer is a solidified silver paste filling layer penetrating the conductive channel and extending at both ends to the periphery of the conductive channel, respectively.
  • the size of the display area of the touch panel is 43 inches or more, and preferably 55 inches or more.
  • the touch panel is a capacitive touch panel.
  • a touch screen includes a display component, a touch panel, and a cover plate component.
  • the display component and the cover plate component are respectively located on two sides of the touch panel.
  • the touch panel is described in any one of the foregoing embodiments.
  • the electrode lead structure of the touch panel leads the conductive pattern layer of the display area.
  • the electrode lead structure of the touch screen and the touch panel described above uses a flexible circuit board instead of the traditional laser etching method to form a conductive paste layer by using a conductive paste infusion to directly connect the conductive pattern layer on the touch panel with
  • the conductive pads on the flexible circuit board are electrically connected, the connection is stable, and the conductive circuit layer is directly used to bind the flexible circuit board to the touch panel, eliminating the traditional need to etch in the non-visible area of the touch panel.
  • the process of coating or forming the electrode lead does not need to perform the cleaning process of the electrode lead, which is beneficial to reducing the cost and improving the yield of the product.
  • FIG. 1 is a schematic structural diagram of an electrode lead structure of a touch panel according to an embodiment of the present invention
  • FIG. 2 is a sectional view of the partial structure in FIG. 1;
  • 3a and 3b are schematic structural diagrams of conductive pads having conductive channels with different structures
  • FIG. 4 is a schematic diagram of an electrical connection manner between a flexible circuit board and a touch panel in another embodiment.
  • an electrode lead structure of a touch panel is obtained by placing a flexible circuit board 10 on an edge of a display area 21 of the touch panel 20 and injecting a conductive paste. The binding of the flexible circuit board 10 and the electrode extraction of the display area 21 are realized.
  • the flexible circuit board 10 has a conductive passage 11 penetrating in a thickness direction thereof.
  • the flexible circuit board 10 is provided with a conductive pad 12 at a position corresponding to the conductive channel 11.
  • the flexible circuit board 10 is further provided with a lead wire 13 electrically connected to the conductive pad 12.
  • the conductive channel 11 is filled with a cured conductive paste layer 30 for directly and electrically connecting the conductive pattern layer 22 and the conductive pad 12 of the display area 21 of the touch panel 20.
  • the flexible circuit board 10 of this embodiment is provided with a conductive channel 11.
  • the conductive channel may be a through-hole structure (such as a cylindrical hole) or a U-shaped through-groove structure.
  • a conductive paste of silver paste can be injected into the conductive channel 11.
  • the conductive paste can be filled in the conductive channel 11 and can be Both ends of the conductive channel respectively extend to the periphery of the conductive channel 11 to form a solidified conductive paste layer 30, such as a solidified silver paste filling layer, to directly electrically connect the conductive pattern layer 22 and the conductive pad 12.
  • the flexible circuit board 10 of this embodiment includes a connection portion 101 and a lead-out portion 102.
  • the connecting portion 101 is provided on the edge of the display area 21 and extends along the edge, and the lead-out portion 102 is connected to the connecting portion 101 and extends outwardly away from the display area 21.
  • the connecting portion 101 is provided with a plurality of conductive channels 11 and a plurality of conductive pads 12 respectively corresponding to different sensing regions of the conductive pattern layer 22, such as corresponding to different sensing strips.
  • Each of the lead-out portions 102 leads to a plurality of lead-out wires 13, that is, each lead-out portion 120 can lead the lead-out conductive 13 from a plurality of conductive pads 12 together.
  • the flexible circuit board 10 of this embodiment is a single-sided conductive flexible circuit board, and the conductive pads 12 and lead wires 13 are located on the same side of the flexible circuit board 10.
  • the conductive pad 12 may be, but is not limited to, a copper pad; the lead-out wire 13 may be, but is not limited to, a copper wire.
  • a side of the flexible circuit board 10 provided with the conductive pads 12 faces the touch panel 20.
  • the flexible circuit board 10 is provided with the conductive pads 12.
  • One side can also be set away from the touch panel 20, as shown in FIG. 4.
  • the conductive pattern layer 22 is preferably a nano-silver wire layer.
  • the edge portion of the conductive pattern layer 22 of this embodiment is located directly below the conductive channel 11, so there is no need to form electrode leads on edge portions such as non-visible areas outside the display area 21 by photolithography or coating, and can be directly passed
  • the conductive paste layer 30 binds the flexible circuit board 10 to the touch panel 20 and directly implements the electrical connection between the conductive pads 12 of the flexible circuit board 10 and the conductive pattern layer 22.
  • the touch panel 20 of this embodiment is a capacitive touch panel, and the electrode lead structure of the touch panel is mainly used for the touch panel 20 with a display area 21 having a size of 43 inches or more, especially the size of the display area 21 is between 55-inch or larger touch panel 20.
  • this embodiment also provides a touch screen, which includes a display component, a touch panel, and a cover component.
  • the display component and the cover component are respectively located on two sides of the touch panel.
  • the touch panel draws out the conductive pattern layer in the display area of the touch panel through the electrode lead structure of the touch panel according to any one of the foregoing embodiments.
  • the electrode lead structure of the touch screen and the touch panel described above uses the flexible circuit board 10 instead of the traditional laser etching method to form the conductive paste layer, and the conductive paste layer 30 is formed by using a conductive paste infusion to directly conduct electricity on the touch panel 20
  • the pattern layer 22 is electrically connected to the conductive pad 12 on the flexible circuit board 10, and the connection is stable, and the conductive paste layer 30 is directly used to connect and bind the flexible circuit board 10 and the touch panel 20, eliminating the traditional need to touch
  • the process of etching or coating the non-visible area of the control panel 20 to form the electrode leads does not require subsequent cleaning of the electrode leads, which is beneficial to reducing costs and improving the yield of the product.

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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

本发明涉及一种触摸屏及其触控面板的电极引线结构。该触摸屏及其触控面板的电极引线结构通过使用柔性电路板替代传统的激光刻蚀出通道的方法，使用导电浆料灌注的方式形成导电浆料层直接将触控面板上的导电图案层与柔性电路板上的导电焊盘电连接，连接稳定，且直接使用导电浆料层将柔性电路板与触控面板连接绑定，省去了传统的需要在触控面板的非可视区刻蚀或涂布形成电极引线的工序，后续也无需进行电极引线的清洗工序，有利于降低成本、提高产品的良率。

Description

触摸屏及其触控面板的电极引线结构 技术领域
本发明涉及触摸显示技术领域，尤其是涉及一种触摸屏及其触控面板的电极引线结构。
背景技术
触摸屏是现今电子设备广泛使用的输入和显示装置。随着触摸显示技术的发展，大尺寸触摸屏的使用越来越普遍。传统的触摸屏在制作时，普遍采用在边缘区激光刻蚀出电极通道的方式将触摸显示区的电极引出，该项技术对于小尺寸的触摸屏制作具有较好的效果，然而对于大尺寸触摸屏，如43寸或55寸以上的触摸屏产品，由于需要刻蚀的通道过长，需要对通道进行严格的清洗以防止短路，制作成本较高，而且即使有严格的清洗工序，还是会经常发生通道之间短路的情况，产品的良率难以提升。
发明内容
基于此，有必要提供一种有利于提高产品良率的触摸屏及其触控面板的电极引线结构。
一种触控面板的电极引线结构，在触控面板的显示区的边缘设置柔性电路板，所述柔性电路板具有沿其厚度方向贯通的导电通道，所述柔性电路板对应所述导电通道的位置设有导电焊盘，所述柔性电路板上还设有与所述导电焊盘电连接的引出导线，所述导电通道中填充有用于将所述触控面板的显示区的导电图案层与所述导电焊盘直接电连接的固化的导电浆料层。
在其中一个实施例中，所述柔性电路板包括连接部和引出部，所述连接部设在所述显示区的边缘且沿所述边缘延伸，所述引出部与所述连接部连接且向远离所述显示区的外侧延伸，所述连接部设有多个所述导电通道和多个所述导电焊盘，每个所述引出部引出有多条所述引出导线。
在其中一个实施例中，所述柔性电路板为单面导电的柔性电路板，所述导电焊盘及所述引出导线位于所述柔性电路板的同一侧。
在其中一个实施例中，所述柔性电路板的设有所述导电焊盘的一侧朝向所述触控面板。
在其中一个实施例中，所述导电通道为通孔结构或U型通槽结构。
在其中一个实施例中，所述导电图案层为纳米银线层；所述导电焊盘为铜焊盘；所述引出导线为铜导线。
在其中一个实施例中，所述固化的导电浆料层为穿设于所述导电通道且两端分别向所述导电通道的***延伸的固化的银浆填充层。
在其中一个实施例中，所述触控面板的显示区的尺寸在43寸以上，优选55寸以上。
在其中一个实施例中，所述触控面板为电容式触控面板。
一种触摸屏，包括显示组件、触控面板及盖板组件，所述显示组件及所述盖板组件分别位于所述触控面板的两侧，所述触控面板通过上述任一实施例所述的触控面板的电极引线结构将其显示区的导电图案层引出。
上述触摸屏及其触控面板的电极引线结构通过使用柔性电路板替代传统的激光刻蚀出通道的方法，使用导电浆料灌注的方式形成导电浆料层直接将触控面板上的导电图案层与柔性电路板上的导电焊盘电连接，连接稳定，且直接使用导电浆料层将柔性电路板与触控面板连接绑定，省去了传统的需要在触控面板的非可视区刻蚀或涂布形成电极引线的工序，后续也无需进行电极引线的清洗工序，有利于降低成本、提高产品的良率。
附图说明
图1为本发明一实施方式的触控面板的电极引线结构的结构示意图；
图2为图1中局部结构的剖视图；
图3a和图3b为具有不同结构的导电通道的导电焊盘的结构示意图；
图4为其他实施方式中柔性电路板与触控面板的电连接方式示意图。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。所述“直接”即不存在居中的元件。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请结合图1和图2，本发明一实施方式的触控面板的电极引线结构，其是通过在触控面板20的显示区21的边缘设置柔性电路板10并通过灌注导电浆料的方式来实现柔性电路板10的绑定和显示区21的电极引出。
具体地，在本实施方式中，柔性电路板10具有沿其厚度方向贯通的导电通道11。柔性电路板10对应导电通道11的位置设有导电焊盘12。柔性电路板10上还设有与导电焊盘12电连接的引出导线13。导电通道11中填充有用于将触控面板20的显示区21的导电图案层22与导电焊盘12直接电连接的固化的导电浆料层30。
本实施方式的柔性电路板10开设有导电通道11，如图3a和3b所示，导电通道可以是通孔结构(如圆柱形孔)，也可以是U型通槽结构。通过在柔性电路板10上开设导电通道11，可以在该导电通道11中注入银浆的导电浆料，利用导电浆料固化前的流动性，导电浆料可以填充在导电通道11中并可在导电通道的两端分别向导电通道11的***延伸，形成固化的导电浆料层30，如形成固化的银浆填充层等，以将导电图案层22与导电焊盘12直接电连接。
如图1所示，本实施方式的柔性电路板10包括连接部101和引出部102。连接部101设在显示区21的边缘且沿边缘延伸，引出部102与连接部101连接且向远离显示区21的外侧延伸。连接部101设有多个导电通道11和多个导电焊盘12，分别对应导电图案层22的不同感应区域，如对应不同的感应条带等。每个引出部102引出有多条引出导线13，也即每个引出部120可以将源自多个导电焊盘12的引出导电13汇聚中引出。
本实施方式的柔性电路板10为单面导电的柔性电路板，其导电焊盘12及引出导线13位于柔性电路板10的同一侧。导电焊盘12可以是但不限于铜焊盘；引出导线13可以是但不限于铜导线。
如图2所示的实施方式中，柔性电路板10的设有导电焊盘12的一侧朝向触控面板20，在其他实施方式中，可理解，柔性电路板10的设有导电焊盘12的一侧也可以背向触控面板20设置，如图4所示。
在本实施方式中，导电图案层22优选为纳米银线层。本实施方式的导电图案层22的边缘部位位于导电通道11的正下方，因而无需通过光刻或涂布的方式在显示区21之外的非可视区等边缘部位形成电极引线，可直接通过上述导电浆料层30将柔性电路板10绑定在触控面板20上且直接实现柔性电路板10的导电焊盘12与导电图案层22的电连接。
本实施方式的触控面板20是电容式触控面板，该触控面板的电极引线结构主要用于显示区21的尺寸在43寸以上的触控面板20上，尤其是显示区21的尺寸在55寸以上的大尺寸触控面板20。
进一步，本实施方式还提供了一种触摸屏，其包括显示组件、触控面板及盖板组件。显示组件及盖板组件分别位于触控面板的两侧。触控面板通过上述任一实施方式所述的触控面板的电极引线结构将其显示区的导电图案层引出。
上述触摸屏及其触控面板的电极引线结构通过使用柔性电路板10替代传统的激光刻蚀出通道的方法，使用导电浆料灌注的方式形成导电浆料层30直接将触控面板20上的导电图案层22与柔性电路板10上的导电焊盘12电连接，连接稳定，且直接使用导电浆料层30将柔性电路板10与触控面板20连接绑定， 省去了传统的需要在触控面板20的非可视区刻蚀或涂布形成电极引线的工序，后续也无需进行电极引线的清洗工序，有利于降低成本、提高产品的良率。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种触控面板的电极引线结构，其特征在于，在触控面板的显示区的边缘设置柔性电路板，所述柔性电路板具有沿其厚度方向贯通的导电通道，所述柔性电路板对应所述导电通道的位置设有导电焊盘，所述柔性电路板上还设有与所述导电焊盘电连接的引出导线，所述导电通道中填充有用于将所述触控面板的显示区的导电图案层与所述导电焊盘直接电连接的固化的导电浆料层。
  2. 如权利要求1所述的触控面板的电极引线结构，其特征在于，所述柔性电路板包括连接部和引出部，所述连接部设在所述显示区的边缘且沿所述边缘延伸，所述引出部与所述连接部连接且向远离所述显示区的外侧延伸，所述连接部设有多个所述导电通道和多个所述导电焊盘，每个所述引出部引出有多条所述引出导线。
  3. 如权利要求1所述的触控面板的电极引线结构，其特征在于，所述柔性电路板为单面导电的柔性电路板，所述导电焊盘及所述引出导线位于所述柔性电路板的同一侧。
  4. 如权利要求3所述的触控面板的电极引线结构，其特征在于，所述柔性电路板的设有所述导电焊盘的一侧朝向所述触控面板。
  5. 如权利要求1所述的触控面板的电极引线结构，其特征在于，所述导电通道为通孔结构或U型通槽结构。
  6. 如权利要求1～5中任一项所述的触控面板的电极引线结构，其特征在于，所述导电图案层为纳米银线层；所述导电焊盘为铜焊盘；所述引出导线为铜导线。
  7. 如权利要求1～5中任一项所述的触控面板的电极引线结构，其特征在于，所述固化的导电浆料层为穿设于所述导电通道且两端分别向所述导电通道的***延伸的固化的银浆填充层。
  8. 如权利要求1～5中任一项所述的触控面板的电极引线结构，其特征在于，所述触控面板的显示区的尺寸在43寸以上。
  9. 如权利要求1～5中任一项所述的触控面板的电极引线结构，其特征在于， 所述触控面板为电容式触控面板。
  10. 一种触摸屏，其特征在于，包括显示组件、触控面板及盖板组件，所述显示组件及所述盖板组件分别位于所述触控面板的两侧，所述触控面板通过如权利要求1～9中任一项所述的触控面板的电极引线结构将其显示区的导电图案层引出。
PCT/CN2018/118469 2018-06-28 2018-11-30 触摸屏及其触控面板的电极引线结构 WO2020000896A1 (zh)

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CN203386179U (zh) * 2013-08-09 2014-01-08 南昌欧菲光科技有限公司 保护盖板及含有该保护盖板的触摸屏
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