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 PDFInfo
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- 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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- circuit board
- transfer
- touch
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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
- G06F3/0412—Digitisers 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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Claims (15)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
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CN201910877931.2A CN110597416B (zh) | 2019-09-17 | 2019-09-17 | 一种柔性电路板、触控显示面板和触控显示装置 |
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CN105979696A (zh) * | 2015-03-13 | 2016-09-28 | 三星显示有限公司 | 柔性电路板和包括柔性电路板的显示设备 |
CN206363696U (zh) * | 2015-11-24 | 2017-07-28 | 株式会社日本显示器 | 显示装置 |
CN110192237A (zh) * | 2017-01-13 | 2019-08-30 | 夏普株式会社 | 显示装置 |
CN107393422A (zh) * | 2017-09-04 | 2017-11-24 | 武汉华星光电半导体显示技术有限公司 | 显示面板及显示设备 |
CN110597416A (zh) * | 2019-09-17 | 2019-12-20 | 京东方科技集团股份有限公司 | 一种柔性电路板、触控显示面板和触控显示装置 |
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