WO2021051739A1 - 一种柔性电路板、触控显示面板和触控显示装置 - Google Patents

一种柔性电路板、触控显示面板和触控显示装置 Download PDF

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Publication number
WO2021051739A1
WO2021051739A1 PCT/CN2020/074714 CN2020074714W WO2021051739A1 WO 2021051739 A1 WO2021051739 A1 WO 2021051739A1 CN 2020074714 W CN2020074714 W CN 2020074714W WO 2021051739 A1 WO2021051739 A1 WO 2021051739A1
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WIPO (PCT)
Prior art keywords
circuit board
transfer
touch
area
substrate
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PCT/CN2020/074714
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English (en)
French (fr)
Inventor
朱元章
熊韧
汤强
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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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Publication of WO2021051739A1 publication Critical patent/WO2021051739A1/zh

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display

Definitions

  • the embodiments of the present disclosure relate to, but are not limited to, the field of display technology, and in particular to a flexible circuit board, a touch display panel, and a touch display device.
  • the touch display panel includes a display panel, a touch sensor for realizing touch, a touch chip, and a flexible circuit board.
  • the touch sensor is arranged in the packaging layer of the display panel, the touch chip is arranged on the flexible circuit board, and signals are transmitted to the touch sensor through the touch signal line.
  • the flexible circuit board is arranged in more layers, which results in a higher manufacturing cost of the flexible circuit board and a higher product defect rate.
  • the present disclosure provides a flexible circuit board, which is arranged in a touch display panel, the touch display panel is further provided with touch traces, and the flexible circuit board includes: a first circuit board and a second circuit board.
  • the first circuit board includes: a first substrate and a touch chip disposed on the first substrate;
  • the second circuit board is arranged on a side of the first substrate close to the touch chip, and is arranged to connect the touch trace and the touch chip.
  • the second circuit board includes: a second substrate and a plurality of interconnection wires and a plurality of interconnection electrodes insulated from each other provided on the second substrate;
  • the switching wires correspond to a plurality of the switching electrodes one-to-one, and each switching wire is connected to a corresponding switching electrode; the switching wires are arranged on the second substrate away from the first substrate On one side, the adapter electrode is arranged on a side of the second substrate close to the first substrate.
  • the second substrate includes: a wiring area, and a first bonding area and a second bonding area located on opposite sides of the wiring area;
  • the switching electrode includes: a first switching area Electrode and second transfer electrode;
  • the transfer wiring is located in the wiring area, the first transfer electrode is located in the first binding area, and is configured to connect the touch chip and the transfer wiring corresponding to the transfer electrode.
  • the two transfer electrodes are located in the second binding area and are configured to connect the transfer wires and the touch wires corresponding to the transfer electrodes.
  • a plurality of the transfer lines are arranged in parallel; the first binding area and the second binding area are arranged along a first direction, and the first direction is the transfer The extension direction of the trace.
  • a plurality of the first transfer electrodes are arranged along a second direction, and a plurality of the second transfer electrodes are arranged along a second direction, and the second direction is the transfer wiring The arrangement direction.
  • the distance between two adjacent first transfer electrodes is 0.2 mm to 0.3 mm
  • the distance between two adjacent second transfer electrodes is 0.2 mm to 0.3 mm.
  • a plurality of via regions are further provided on the second substrate, and the via regions correspond to the transfer electrodes in a one-to-one manner;
  • Each transfer electrode is connected to a corresponding transfer trace through a corresponding via area.
  • the via area includes: a first via area and a second via area; the first via area is located in the first binding area, and the second via area Located in the second binding zone.
  • the orthographic projection of the first transfer electrode on the second substrate covers the orthographic projection of the first via area on the second substrate, and the first transfer electrode The electrode connects the touch chip and the corresponding transfer trace of the transfer electrode through the first via area;
  • the orthographic projection of the second adapter electrode on the second substrate covers the orthographic projection of the second via area on the second substrate, and the second adapter electrode passes through the second via hole The area connects the transfer wire corresponding to the transfer electrode and the touch wire.
  • both the first via area and the second via area include: at least one via;
  • the opening shape of the via hole includes a circular shape or an elliptical shape.
  • the aperture of the via hole is 0.3 mm to 0.4 mm.
  • At least two of the via holes are arranged along the first direction.
  • the present disclosure also provides a touch display panel, including: the above-mentioned flexible circuit board.
  • the touch control traces include: first traces and second traces arranged in different layers.
  • the present disclosure also provides a touch display device, including: the above touch display panel.
  • FIG. 1 is a top view of a flexible circuit board provided by an embodiment of the disclosure
  • FIG. 2 is a side view of a flexible circuit board provided by an embodiment of the disclosure.
  • Fig. 3 is a top view of a flexible circuit board provided by an exemplary embodiment
  • Fig. 4 is a side view of a flexible circuit board provided by an exemplary embodiment
  • Fig. 5 is a top view of a flexible circuit board provided by another exemplary embodiment
  • Fig. 6 is a perspective view of a second circuit board provided by an exemplary embodiment
  • FIG. 7 is a schematic diagram of the connection between the second transfer electrode and the touch trace provided by an exemplary embodiment
  • FIG. 8 is a schematic structural diagram of a touch display panel provided by an embodiment of the disclosure.
  • Fig. 1 is a top view of a flexible circuit board provided by an embodiment of the disclosure
  • Fig. 2 is a side view of a flexible circuit board provided by an embodiment of the disclosure.
  • the flexible circuit board provided by the embodiment of the present disclosure is arranged in a touch display panel, and the touch display panel is also provided with touch traces.
  • the flexible circuit board includes: a first circuit board 10 and a second circuit board 10; Two circuit board 20.
  • the first circuit board 10 includes: a first substrate 11 and a touch chip 12 arranged on the first substrate 11; the second circuit board 20 is arranged on a side of the first substrate 11 close to the touch chip 12, and is arranged as a connection contact Control wiring and touch chip 12.
  • the flexible circuit board may further include: a timing control chip and a power supply chip.
  • the touch display panel may include: a display panel and a touch sensor, wherein the touch sensor is provided in the display panel, and a driving chip (not shown in the figure) may be provided on the display panel, Wherein, the driving chip is configured to provide driving signals to the gate driving circuit and the source driving circuit in the display panel.
  • the first substrate 11 may be a flexible substrate, where the flexible substrate may be, but not limited to, polyethylene terephthalate, ethylene terephthalate, or polyether.
  • the flexible substrate may be, but not limited to, polyethylene terephthalate, ethylene terephthalate, or polyether.
  • ether ketone polystyrene, polycarbonate, polyarylate, polyarylate, polyimide, polyvinyl chloride, polyethylene, and textile fiber.
  • the touch chip 12 is configured to provide a driving signal to a touch sensor arranged on the touch display panel through a touch trace, wherein the touch sensor includes a plurality of driving electrodes and a plurality of sensing electrode.
  • the number of touch traces is multiple, in order from Tx1 to TxN, wherein the multiple touch traces correspond to the multiple driving electrodes one-to-one, and each The touch control traces are configured to provide driving signals to the corresponding driving electrodes.
  • the number of touch traces can be one or more, and the number of touch traces is determined according to the touch accuracy of the touch display panel.
  • At least one of the first circuit board 10 and the second circuit board 20 may be a double-layer circuit board.
  • the flexible circuit board provided by the embodiments of the present disclosure is arranged in a touch display panel, and the touch display panel is also provided with touch traces.
  • the flexible circuit board includes: a first circuit board and a second circuit board, and the first circuit board includes : A first substrate and a touch chip arranged on the first substrate; the second circuit board is arranged on a side of the first substrate close to the touch chip, and is arranged to connect the touch trace and the touch chip.
  • FIG. 3 is a top view of a flexible circuit board provided by an exemplary embodiment
  • FIG. 4 is a side view of a flexible circuit board provided by an exemplary embodiment.
  • a second circuit board in a flexible circuit board provided by an exemplary embodiment includes: a second substrate 21 and a plurality of interconnection wires 22 and A plurality of interconnection electrodes 23 insulated from each other.
  • the multiple switching wires 22 correspond to the multiple switching electrodes 23 one-to-one, and each switching wire is connected to a corresponding switching electrode.
  • the transfer wiring 22 may be disposed on the side of the second substrate 21 away from the first substrate 11, and the transfer electrode 23 may be disposed on the side of the second substrate 21 close to the first substrate 11.
  • a ground layer is further provided on the second circuit board, wherein the ground layer is used to provide a ground signal.
  • the second substrate 21 may be a flexible substrate, where the flexible substrate may be, but not limited to, polyethylene terephthalate, ethylene terephthalate, or polyether.
  • the flexible substrate may be, but not limited to, polyethylene terephthalate, ethylene terephthalate, or polyether.
  • ether ketone polystyrene, polycarbonate, polyarylate, polyarylate, polyimide, polyvinyl chloride, polyethylene, and textile fiber.
  • a plurality of transfer wires 22 are arranged to be insulated from each other, and a plurality of transfer electrodes 23 are arranged to be spaced apart from each other.
  • the arrangement of the transfer wires and the transfer electrodes in the second circuit board can avoid the overlap between the transfer wires, reduce the interference between the signals of the transfer wires, and improve the performance of the touch display panel. Touch accuracy.
  • the transfer wiring 22 is arranged on the side of the second substrate 21 away from the first substrate 11, which can prevent the touch signal provided to the touch wiring from being arranged on the first circuit board.
  • the signal in the signal line is affected to improve the touch accuracy of the touch display panel.
  • the transfer wiring 22 is made of a transparent conductive material, where the transparent conductive material includes indium tin oxide or zinc tin oxide, and may also include other transparent conductive materials.
  • the transfer electrode 23 is made of solder paste, and the transfer electrode 23 is connected to the transfer trace 22 by crimping, and is fixed on the first circuit board by welding.
  • the transfer wires 22 correspond to the touch wires on a one-to-one basis.
  • the touch display panel further includes: a plurality of signal lines S, wherein the transfer electrode 23 is configured to connect the touch chip 12 and the transfer wire 22 through the signal line S, and is also configured to pass through The signal wire S is connected to the transfer wire 22 and the touch wire.
  • the plurality of signal lines S correspond to the plurality of switching electrodes 23 one-to-one, and each signal line is connected to the corresponding switching electrode.
  • the signal line S may be made of a transparent conductive material, where the transparent conductive material includes indium tin oxide or zinc tin oxide, and may also include other transparent conductive materials.
  • the second substrate 21 includes: a wiring area A and a first bonding area B1 and a second bonding area B2 located on opposite sides of the wiring area A;
  • the transfer electrode 23 includes: a first transfer The electrode 24 and the second switching electrode 25.
  • the transfer wiring 22 is located in the wiring area A, and the first transfer electrode 24 is located in the first bonding area B1, and is configured to connect the touch chip 12 and the transfer wiring 22 corresponding to the transfer electrode.
  • the second transfer electrode 25 is located in the second binding area B2, and is configured to connect the transfer wire 22 corresponding to the transfer electrode and the touch wire.
  • a plurality of transfer wires 22 are arranged in parallel, and the first binding area B1 and the second binding area B2 are arranged along a first direction, wherein the first direction is the direction of the transfer wires 22 Extension direction.
  • the plurality of first transfer electrodes 24 are arranged along the second direction
  • the plurality of second transfer electrodes 25 are arranged along the second direction, where the second direction is the direction of the transfer wiring arrangement.
  • the first direction is perpendicular to the second direction, which can reduce the area occupied by the second circuit board.
  • the distance between two adjacent first transfer electrodes 24 may be equal, or may not be equal, and the distance between two adjacent first transfer electrodes is based on the change of the transfer wiring.
  • the wiring method is determined.
  • the distance L1 between two adjacent first transfer electrodes 24 is 0.2 mm to 0.3 mm, which can reduce the area occupied by the second circuit board.
  • the distance between two adjacent second transfer electrodes 25 may be equal, or may not be equal, and the distance between two adjacent second transfer electrodes is based on the transfer wiring.
  • the wiring method is determined.
  • the distance L2 between two adjacent second transfer electrodes 25 is 0.2 mm to 0.3 mm, which can reduce the area occupied by the second circuit board.
  • Fig. 5 is a top view of a flexible circuit board provided by another exemplary embodiment.
  • each touch trace Tx includes: a first trace Tx_1 and a second trace Tx_2 arranged in different layers, the first trace Tx_1 and the second trace Tx_2 are all connected to the second transfer electrode 25 corresponding to the touch trace.
  • FIG. 6 is a perspective view of a second circuit board provided by an exemplary embodiment
  • FIG. 7 is a schematic diagram of a connection between a second transfer electrode and a touch trace provided by an exemplary embodiment.
  • the second substrate 21 in the flexible circuit board provided by an exemplary embodiment is further provided with a plurality of via regions.
  • the via area corresponds to the transfer electrode 23 one-to-one, and each transfer electrode 23 is connected to a corresponding transfer wiring through a corresponding via area.
  • the transfer electrode 23 is connected to the transfer trace corresponding to the transfer electrode 23 through the via area, and the connecting electrode 23 is pressed onto the transfer trace through the via area, which can avoid stress.
  • the unbalanced phenomenon causes the problem that the touch chip cannot provide driving signals to the touch traces, so as to ensure the touch effect of the touch display panel.
  • the via area provided by an exemplary embodiment includes: a first via area H1 and a second via area H2.
  • the first via area H1 is located in the first bonding area B1, and the second via area H2 is located in the second bonding area B2.
  • the orthographic projection of the first transfer electrode 24 on the second substrate 21 covers the orthographic projection of the first via area H1 on the second substrate 21, and the first transfer electrode 24 passes through the first
  • the via area H1 is connected to the touch chip 12 and the transfer wires corresponding to the transfer electrodes.
  • the orthographic projection of the second transfer electrode 25 on the second substrate 21 covers the orthographic projection of the second via area H2 on the second substrate 21, and the second transfer electrode 25 passes through the second substrate 21.
  • the via area H2 is connected to the transfer trace 22 and the touch trace corresponding to the transfer electrode.
  • both the first via region H1 and the second via region H2 include: at least one via.
  • the number of vias in at least one of the first via region H1 and the second via region H2 may be multiple, which depends on the area of the flexible circuit board and the first via electrode and the second via area.
  • the area occupied by the second transfer electrode is determined.
  • the number of vias can be more than three. The more the number of vias, the transfer routing The better the contact with the transfer electrode, the better the touch effect of the touch display panel can be ensured.
  • FIG. 6 illustrates an example in which both the first via region H1 and the second via region H2 include two via holes.
  • the opening shape of the via hole may be circular or elliptical, or may be rectangular or polygonal.
  • the opening shape of the via hole may be set to any shape, as shown in FIGS. 6 and 7 is an example in which the opening shape of the via hole is circular.
  • the aperture of the via hole is 0.3 mm to 0.4 mm.
  • the size of the via hole can be adjusted according to the space size of the flexible circuit board and the size of the transfer electrode, for example: when the size of the flexible circuit board is larger and the size of the transfer electrode is larger, it can be increased The size of the via.
  • the number of vias in the first via region or the second via region is at least two vias; the at least two vias are arranged along the first direction .
  • the distance between two adjacent vias may be equal. That is, the via holes arranged in the first via hole area and the second via hole area are symmetrically arranged.
  • the number of vias in the first via region and the number of vias in the second via region may be the same or different, which is not limited in the embodiment of the present disclosure.
  • FIG. 6 shows a perspective view of a switching electrode, all the switching electrodes have the same shape.
  • FIG. 7 illustrates an example in which the touch wiring includes the first wiring and the second wiring arranged in different layers.
  • FIG. 8 is a schematic structural diagram of a touch display panel provided by an embodiment of the disclosure. As shown in FIG. 8, an embodiment of the present disclosure further provides a touch display panel including: the flexible circuit board 1 provided by any of the foregoing embodiments.
  • the touch display panel further includes: a display panel 2 and a touch sensor, wherein the touch sensor is provided in the display panel.
  • the display panel may be a liquid crystal display panel or an organic light emitting diode display panel.
  • the touch sensor includes a driving electrode and a sensing electrode, wherein the touch trace is connected to the driving electrode and is configured to provide a driving signal to the driving electrode to realize touch control.
  • the flexible circuit board in this embodiment is the flexible circuit board provided by any of the foregoing embodiments, and the implementation principle and the implementation effect are similar, and will not be repeated here.
  • An embodiment of the present disclosure also provides a touch display device, including: the touch display panel provided in any of the foregoing embodiments.
  • the touch display device may be a liquid crystal display device or an organic light emitting diode display device, where the touch display display device may be: a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame Or a navigator, or can be any product or component with display and touch functions.
  • the touch display panel provided in this embodiment is the touch display panel provided in any of the foregoing embodiments, and the implementation principle and implementation effect are similar, and will not be repeated here.

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

一种柔性电路板、触控显示面板和触控显示装置,柔性电路板设置在触控显示面板中,触控显示面板中还设置有触控走线,柔性电路板包括:第一电路板和第二电路板,第一电路板包括:第一基底以及设置在第一基底上的触控芯片;第二电路板设置在第一基底靠近触控芯片的一侧,且设置为连接触控走线和触控芯片。

Description

一种柔性电路板、触控显示面板和触控显示装置 技术领域
本公开实施例涉及但不限于显示技术领域,具体涉及一种柔性电路板、触控显示面板和触控显示装置。
背景技术
随着显示技术的飞速发展,触控显示面板已经逐渐遍及在人们的生活中。触控显示面板包括:显示面板、实现触控的触控传感器、触控芯片以及柔性电路板。为了实现触控显示面板的轻薄化,触控传感器设置在显示面板的封装层中,触控芯片设置在柔性电路板上,且通过触控信号线向触控传感器传输信号。
通常,为了将柔性电路板中的触控信号线与其他信号线屏蔽,柔性电路板被设置成较多层,导致柔性电路板的制作成本以及产品不良率较高。
发明概述
以下是对本公开详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
第一方面,本公开提供了一种柔性电路板,设置在触控显示面板中,所述触控显示面板中还设置有触控走线,所述柔性电路板包括:第一电路板和第二电路板,所述第一电路板包括:第一基底以及设置在所述第一基底上的触控芯片;
所述第二电路板设置在所述第一基底靠近所述触控芯片的一侧,且设置为连接所述触控走线和所述触控芯片。
在一些可能的实现方式中,所述第二电路板包括:第二基底以及设置在所述第二基底上多条相互绝缘的转接走线和多个相互绝缘的转接电极;多条所述转接走线与多个所述转接电极一一对应,每个转接走线与对应的转接电极连接;所述转接走线设置在所述第二基底远离所述第一基底的一侧,所述 转接电极设置在所述第二基底靠近所述第一基底的一侧。
在一些可能的实现方式中,所述第二基底包括:走线区以及位于走线区相对两侧的第一绑定区和第二绑定区;所述转接电极包括:第一转接电极和第二转接电极;
所述转接走线位于所述走线区,所述第一转接电极位于所述第一绑定区,且设置为连接触控芯片和转接电极对应的转接走线,所述第二转接电极位于所述第二绑定区,且设置为连接转接电极对应的转接走线和触控走线。
在一些可能的实现方式中,多条所述转接走线平行设置;所述第一绑定区和所述第二绑定区沿第一方向设置,所述第一方向为所述转接走线的延伸方向。
在一些可能的实现方式中,多个所述第一转接电极沿第二方向设置,多个所述第二转接电极沿第二方向设置,所述第二方向为所述转接走线的排布方向。
在一些可能的实现方式中,相邻两个第一转接电极之间的距离为0.2毫米至0.3毫米,相邻两个第二转接电极之间的距离为0.2毫米至0.3毫米。
在一些可能的实现方式中,所述第二基底上还设置有多个过孔区域,所述过孔区域与所述转接电极一一对应;
每个转接电极通过对应的过孔区域与对应的转接走线连接。
在一些可能的实现方式中,所述过孔区域包括:第一过孔区域和第二过孔区域;所述第一过孔区域位于所述第一绑定区,所述第二过孔区域位于所述第二绑定区。
在一些可能的实现方式中,所述第一转接电极在所述第二基底上的正投影覆盖所述第一过孔区域在所述第二基底上的正投影,所述第一转接电极通过所述第一过孔区域连接所述触控芯片和转接电极对应的转接走线;
所述第二转接电极在所述第二基底上的正投影覆盖所述第二过孔区域在所述第二基底上的正投影,所述第二转接电极通过所述第二过孔区域连接转接电极对应的转接走线和所述触控走线。
在一些可能的实现方式中,所述第一过孔区域和第二过孔区域均包括: 至少一个过孔;
所述过孔的开口形状包括:圆形或椭圆形。
在一些可能的实现方式中,当所述过孔的开口形状为圆形时,所述过孔的孔径为0.3毫米至0.4毫米。
在一些可能的实现方式中,当第一过孔区域或者第二过孔区域的过孔的数量为至少两个时;
至少两个所述过孔沿第一方向设置。
第二方面,本公开还提供了一种触控显示面板,包括:上述柔性电路板。
在一些可能的实现方式中,触控走线包括:异层设置的第一走线和第二走线。
第三方面,本公开还提供了一种触控显示装置,包括:上述触控显示面板。
在阅读并理解了附图和详细描述后,可以明白其他方面。
附图概述
附图用来提供对本公开技术方案的理解,并且构成说明书的一部分,与本公开的实施例一起用于解释本公开的技术方案,并不构成对本公开技术方案的限制。
图1为本公开实施例提供的柔性电路板的俯视图;
图2为本公开实施例提供的柔性电路板的侧视图;
图3为一种示例性实施例提供的柔性电路板的俯视图;
图4为一种示例性实施例提供的柔性电路板的侧视图;
图5为另一种示例性实施例提供的柔性电路板的俯视图;
图6为一种示例性实施例提供的第二电路板的透视图;
图7为一种示例性实施例提供的第二转接电极与触控走线的连接示意图;
图8为本公开实施例提供的触控显示面板的结构示意图。
详述
下文中将结合附图对本公开的实施例进行详细说明。在不冲突的情况下,本公开中的实施例及实施例中的特征可以相互任意组合。
本公开描述了多个实施例,但是该描述是示例性的,而不是限制性的,并且对于本领域的普通技术人员来说,在本公开所描述的实施例包含的范围内可以有更多的实施例和实现方案。尽管在附图中示出了许多可能的特征组合,并在具体实施方式中进行了讨论,但是所公开的特征的许多其它组合方式也是可能的。除非特意加以限制的情况以外,任何实施例的任何特征或元件可以与任何其它实施例中的任何其他特征或元件结合使用,或可以替代任何其它实施例中的任何其他特征或元件。
本公开包括并设想了与本领域普通技术人员已知的特征和元件的组合。本公开已经公开的实施例、特征和元件也可以与任何常规特征或元件组合,以形成由权利要求限定的技术方案。任何实施例的任何特征或元件也可以与来自其它技术方案的特征或元件组合,以形成另一个由权利要求限定的技术方案。因此,应当理解,在本公开中示出讨论的任何特征可以单独地或以任何适当的组合来实现。因此,除了根据所附权利要求及其等同替换所做的限制以外,实施例不受其它限制。此外,可以在所附权利要求的保护范围内进行各种修改和改变。
除非另外定义,本公开中使用的技术术语或者科学术语应当为本公开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。“包括”或者“包含”等类似的词语意指出现该词前面的元件或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,当被描述的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。
图1为本公开实施例提供的柔性电路板的俯视图,图2为本公开实施例 提供的柔性电路板的侧视图。如图1和2所示,本公开实施例提供的柔性电路板设置于触控显示面板中,触控显示面板中还设置有触控走线,柔性电路板包括:第一电路板10和第二电路板20。
第一电路板10包括:第一基底11以及设置在第一基底11上的触控芯片12;第二电路板20设置在第一基底11靠近触控芯片12的一侧,且设置为连接触控走线和触控芯片12。
在一种示例性实施例中,柔性电路板还可以包括:时序控制芯片和电源芯片。
在一种示例性实施例中,触控显示面板可以包括:显示面板和触控传感器,其中,触控传感器设置在显示面板中,显示面板上可以设置有驱动芯片(图中未示出),其中,驱动芯片设置为向显示面板中的栅极驱动电路和源极驱动电路提供驱动信号。
在一种示例性实施例中,第一基底11可以为柔性衬底,其中,柔性衬底可以为但不限于聚对苯二甲酸乙二醇酯、对苯二甲酸乙二醇酯、聚醚醚酮、聚苯乙烯、聚碳酸酯、聚芳基酸酯、聚芳酯、聚酰亚胺、聚氯乙烯、聚乙烯、纺织纤维中的一种或多种。
在一种示例性实施例中,触控芯片12设置为通过触控走线向设置在触控显示面板上的触控传感器提供驱动信号,其中,触控传感器包括多个驱动电极和多个感应电极。
在一种示例性实施例中,如图1所示,触控走线的数量为多个,依次为Tx1至TxN,其中,多条触控走线与多个驱动电极一一对应,每个触控走线设置为向对应的驱动电极提供驱动信号。触控走线的数量可以为一个或多个,触控走线的数量根据触控显示面板的触控精度确定。
在一种示例性实施例中,第一电路板10和第二电路板20中的至少一个可以为双层电路板。
本公开实施例提供的柔性电路板设置在触控显示面板中,触控显示面板中还设置有触控走线,柔性电路板包括:第一电路板和第二电路板,第一电路板包括:第一基底以及设置在第一基底上的触控芯片;第二电路板设置在 第一基底靠近触控芯片的一侧,且设置为连接触控走线和触控芯片。本公开实施例提供的技术方案通过在第一电路板上设置连接触控走线和触控芯片的第二电路板,避免了多层电路板结构,可以降低柔性电路板的制作成本,并提高柔性电路板产品的良品率。
图3为一种示例性实施例提供的柔性电路板的俯视图,图4为一种示例性实施例提供的柔性电路板的侧视图。如图3和4所示,一种示例性实施例提供的柔性电路板中的第二电路板包括:第二基底21以及设置在第二基底21上多条相互绝缘的转接走线22和多个相互绝缘的转接电极23。
多条转接走线22与多个转接电极23一一对应,每个转接走线与对应的转接电极连接。转接走线22可以设置在第二基底21远离第一基底11的一侧,转接电极23可以设置在第二基底21靠近第一基底11的一侧。
在一种示例性实施例中,第二电路板上还设置有接地层,其中,接地层用于提供接地信号。
在一种示例性实施例中,第二基底21可以为柔性衬底,其中,柔性衬底可以为但不限于聚对苯二甲酸乙二醇酯、对苯二甲酸乙二醇酯、聚醚醚酮、聚苯乙烯、聚碳酸酯、聚芳基酸酯、聚芳酯、聚酰亚胺、聚氯乙烯、聚乙烯、纺织纤维中的一种或多种。
在一种示例性实施例中,多条转接走线22相互绝缘设置,多个转接电极23相互间隔设置。第二电路板中这样的转接走线和转接电极设置方式,可以避免转接走线之间的相互重叠,降低转接走线的信号之间的干扰不良,以提高触控显示面板的触控精度。
在一种示例性实施例中,转接走线22设置在第二基底21远离第一基底11的一侧,可以避免向触控走线提供的触控信号被设置在第一电路板上的信号线中的信号所影响,以提高触控显示面板的触控精度。
在一种示例性实施例中,转接走线22的制作材料为透明导电材料,其中,透明导电材料包括:氧化铟锡或者氧化锌锡,还可以包括其他透明导电的材料。
在一种示例性实施例中,转接电极23的制作材料为锡膏,转接电极23 通过压接的方式与转接走线22连接,且通过焊接的方式固定在第一电路板上。
在一种示例性实施例中,转接走线22与触控走线一一对应。
在一种示例性实施例中,触控显示面板还包括:多条信号线S,其中,转接电极23设置为通过信号线S连接触控芯片12和转接走线22,还设置为通过信号线S连接转接走线22和触控走线。
在一种示例性实施例中,多条信号线S与多个转接电极23一一对应,每条信号线与对应的转接电极连接。
在一种示例性实施例中,信号线S的制作材料可以为透明导电材料,其中,透明导电材料包括:氧化铟锡或者氧化锌锡,还可以包括其他透明导电的材料。
如图3所示,第二基底21包括:走线区A以及位于走线区A相对两侧的第一绑定区B1和第二绑定区B2;转接电极23包括:第一转接电极24和第二转接电极25。
转接走线22位于走线区A,第一转接电极24位于第一绑定区B1,且设置为连接触控芯片12和转接电极对应的转接走线22,第二转接电极25位于第二绑定区B2,设置为连接转接电极对应的转接走线22和触控走线。
在一种示例性实施例中,多条转接走线22平行设置,第一绑定区B1和第二绑定区B2沿第一方向设置,其中,第一方向为转接走线22的延伸方向。
在一种示例性实施例中,多个第一转接电极24沿第二方向设置,多个第二转接电极25沿第二方向设置,其中,第二方向为转接走线排布方向,第一方向垂直于第二方向,可以减少第二电路板占用的面积。
在一种示例性实施例中,相邻两个第一转接电极24之间的距离可以相等,或者可以不相等,相邻两个第一转接电极之间的距离根据转接走线的布线方式确定。
在一种示例性实施例中,相邻两个第一转接电极24之间的距离L1为0.2毫米至0.3毫米,可以减少第二电路板占用的面积。
在一种示例性实施例中,相邻两个第二转接电极25之间的距离可以相等,或者,可以不相等,相邻两个第二转接电极之间的距离根据转接走线的布线 方式确定。
在一种示例性实施例中,相邻两个第二转接电极25之间的距离L2为0.2毫米至0.3毫米,可以减少第二电路板占用的面积。
图5为另一种示例性实施例提供的柔性电路板的俯视图。如图5所示,在一种示例性实施例中,每个触控走线Tx包括:异层设置的第一走线Tx_1和第二走线Tx_2,第一走线Tx_1和第二走线Tx_2均与触控走线对应的第二转接电极25连接。
图6为一种示例性实施例提供的第二电路板的透视图,图7为一种示例性实施例提供的第二转接电极与触控走线的连接示意图。如图6和7所示,一种示例性实施例提供的柔性电路板中的第二基底21上还设置有多个过孔区域。
过孔区域与转接电极23一一对应,每个转接电极23通过对应的过孔区域与对应的转接走线连接。
在一种示例性实施例中,转接电极23通过过孔区域与转接电极23对应的转接走线连接,将连接电极23通过过孔区域压合在转接走线上,可以避免压合不均的不良现象所导致的触控芯片无法向触控走线提供驱动信号的问题,以确保触控显示面板的触控效果。
如图6和7所示,一种示例性实施例提供的过孔区域包括:第一过孔区域H1和第二过孔区域H2。
第一过孔区域H1位于第一绑定区B1,第二过孔区域H2位于第二绑定区B2。
在一种示例性实施例中,第一转接电极24在第二基底21上的正投影覆盖第一过孔区域H1在第二基底21上的正投影,第一转接电极24通过第一过孔区域H1连接触控芯片12和转接电极对应的转接走线。
在一种示例性实施例中,第二转接电极25在第二基底21上的正投影覆盖第二过孔区域H2在第二基底21上的正投影,第二转接电极25通过第二过孔区域H2连接转接电极对应的转接走线22和触控走线。
在一种示例性实施例中,第一过孔区域H1和第二过孔区域H2均包括: 至少一个过孔。
在一种示例性实施例中,第一过孔区域H1和第二过孔区域H2中的至少一个的过孔数量可以为多个,其根据柔性电路板的面积以及第一转接电极和第二转接电极占用的面积确定,例如当柔性电路板的尺寸较大且转接电极的尺寸较大时,过孔的个数可以为三个以上,过孔的数量越多,转接走线与转接电极的接触越良好,可以确保触控显示面板的触控效果。
图6是以第一过孔区域H1和第二过孔区域H2均包括2个过孔为例进行说明的。
在一种示例性实施例中,过孔的开口形状可以为圆形或者椭圆形,或者可以为矩形或多边形,在实际生产过程中,过孔的开口形状可以设置为任意形状,图6和图7是以过孔的开口形状为圆形为例进行说明的。
在一种示例性实施例中,当过孔的开口形状为圆形时,过孔的孔径为0.3毫米至0.4毫米。
在实际生产过程中,过孔的尺寸可以根据柔性电路板的空间大小以及转接电极的尺寸进行调整,例如:当柔性电路板的尺寸较大且转接电极的尺寸较大时,可以增大过孔的尺寸。
在一种示例性实施例中,如图6所示,当第一过孔区域或第二过孔区域的过孔的数量为至少两个过孔时;至少两个过孔沿第一方向设置。
在一种示例性实施例中,相邻过孔两个之间的距离可以相等。即设置在第一过孔区域和第二过孔区域中的过孔对称设置。
在一种示例性实施例中,第一过孔区域的过孔数量与第二过孔区域的过孔数量可以相同,或者可以不同,本公开实施例对此不作任何限定。
图6示出的是一个转接电极的透视图,所有转接电极的形状均相同。图7是以触控走线包括异层设置的第一走线和第二走线为例进行说明的。
图8为本公开实施例提供的触控显示面板的结构示意图。如图8所示,本公开实施例还提供一种触控显示面板包括:前述任一个实施例提供的柔性电路板1。
在一种示例性实施例中,如图8所示,触控显示面板还包括:显示面板 2和触控传感器,其中,触控传感器设置在显示面板中。
在一种示例性实施例中,显示面板可以为液晶显示面板或者有机发光二极管显示面板。
在一种示例性实施例中,触控传感器包括:驱动电极和感应电极,其中,触控走线与驱动电极连接,且设置为向驱动电极提供驱动信号,以实现触控。
本实施例中的柔性电路板为前述任一个实施例提供的柔性电路板,实现原理和实现效果类似,在此不再赘述。
本公开实施例还提供一种触控显示装置,包括:前述任一个实施例提供的触控显示面板。
在一种示例性实施例中,触控显示装置可以为液晶显示装置或者有机发光二极管显示装置,其中,触控显示显示装置可以为:手机、平板电脑、电视机、显示器、笔记本电脑、数码相框或导航仪,或者可以为任何具有显示和触控功能的产品或部件。
本实施例提供的触控显示面板为前述任一个实施例提供的触控显示面板,实现原理和实现效果类似,在此不再赘述。
本公开中的附图只涉及本公开实施例涉及到的结构,其他结构可参考通常设计。
为了清晰起见,在用于描述本公开的实施例的附图中,层或微结构的厚度和尺寸被放大。可以理解,当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时,该元件可以“直接”位于另一元件“上”或“下”,或者可以存在中间元件。
虽然本公开所揭露的实施方式如上,但所述的内容仅为便于理解本公开而采用的实施方式,并非用以限定本公开。任何本公开所属领域内的技术人员,在不脱离本公开所揭露的精神和范围的前提下,可以在实施的形式及细节上进行任何的修改与变化,但本公开的专利保护范围,仍须以所附的权利要求书所界定的范围为准。

Claims (15)

  1. 一种柔性电路板,设置在触控显示面板中,所述触控显示面板中还设置有触控走线,所述柔性电路板包括:第一电路板和第二电路板,所述第一电路板包括:第一基底以及设置在所述第一基底上的触控芯片;
    所述第二电路板设置在所述第一基底靠近所述触控芯片的一侧,且设置为连接所述触控走线和所述触控芯片。
  2. 根据权利要求1所述的柔性电路板,其中,所述第二电路板包括:第二基底以及设置在所述第二基底上多条相互绝缘的转接走线和多个相互绝缘的转接电极;
    多条所述转接走线与多个所述转接电极一一对应,每个转接走线与对应的转接电极连接;
    所述转接走线设置在所述第二基底远离所述第一基底的一侧,所述转接电极设置在所述第二基底靠近所述第一基底的一侧。
  3. 根据权利要求2所述的柔性电路板,其中,所述第二基底包括:走线区以及位于所述走线区相对两侧的第一绑定区和第二绑定区;所述转接电极包括:第一转接电极和第二转接电极;
    所述转接走线位于所述走线区,所述第一转接电极位于所述第一绑定区,且设置为连接所述触控芯片和转接电极对应的转接走线,所述第二转接电极位于所述第二绑定区,且设置为连接转接电极对应的转接走线和所述触控走线。
  4. 根据权利要求3所述的柔性电路板,其中,多条所述转接走线平行设置;
    所述第一绑定区和所述第二绑定区沿第一方向设置,所述第一方向为所述转接走线的延伸方向。
  5. 根据权利要求3所述的柔性电路板,其中,多个所述第一转接电极沿第二方向设置,多个所述第二转接电极沿第二方向设置,所述第二方向为所述转接走线的排布方向。
  6. 根据权利要求5所述的柔性电路板,其中,相邻两个第一转接电极之 间的距离为0.2毫米至0.3毫米,相邻两个第二转接电极之间的距离为0.2毫米至0.3毫米。
  7. 根据权利要求3至6任一项所述的柔性电路板,其中,所述第二基底上还设置有多个过孔区域,所述过孔区域与所述转接电极一一对应;
    每个转接电极通过对应的过孔区域与对应的转接走线连接。
  8. 根据权利要求7所述的柔性电极板,其中,所述过孔区域包括:第一过孔区域和第二过孔区域;
    所述第一过孔区域位于所述第一绑定区,所述第二过孔区域位于所述第二绑定区。
  9. 根据权利要求8所述的柔性电路板,其中,所述第一转接电极在所述第二基底上的正投影覆盖所述第一过孔区域在所述第二基底上的正投影,所述第一转接电极通过所述第一过孔区域连接所述触控芯片和转接电极对应的转接走线;
    所述第二转接电极在所述第二基底上的正投影覆盖所述第二过孔区域在所述第二基底上的正投影,所述第二转接电极通过所述第二过孔区域连接转接电极对应的转接走线和所述触控走线。
  10. 根据权利要求9所述的柔性电路板,其中,所述第一过孔区域和所述第二过孔区域均包括:至少一个过孔;
    所述过孔的开口形状包括:圆形或椭圆形。
  11. 根据权利要求10所述的柔性电路板,其中,当所述过孔的开口形状为圆形时,所述过孔的孔径为0.3毫米至0.4毫米。
  12. 根据权利要求10所述的柔性电路板,其中,当第一过孔区域或者第二过孔区域的过孔的数量为至少两个时;
    至少两个所述过孔沿第一方向设置。
  13. 一种触控显示面板,包括:如权利要求1至12任一项所述的柔性电路板。
  14. 根据权利要求13所述的触控显示面板,其中,触控走线包括:异层 设置的第一走线和第二走线。
  15. 一种触控显示装置,包括:如权利要求13或14所述的触控显示面板。
PCT/CN2020/074714 2019-09-17 2020-02-11 一种柔性电路板、触控显示面板和触控显示装置 WO2021051739A1 (zh)

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