WO2020143268A1 - 显示面板及其制备方法、显示装置 - Google Patents

显示面板及其制备方法、显示装置 Download PDF

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Publication number
WO2020143268A1
WO2020143268A1 PCT/CN2019/112589 CN2019112589W WO2020143268A1 WO 2020143268 A1 WO2020143268 A1 WO 2020143268A1 CN 2019112589 W CN2019112589 W CN 2019112589W WO 2020143268 A1 WO2020143268 A1 WO 2020143268A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
flexible circuit
display panel
array substrate
panel according
Prior art date
Application number
PCT/CN2019/112589
Other languages
English (en)
French (fr)
Inventor
谢俊杰
谭叶舟
罗振兴
向彬
桑建
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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
Priority to US16/956,026 priority Critical patent/US11537179B2/en
Publication of WO2020143268A1 publication Critical patent/WO2020143268A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/18Packaging or power distribution
    • G06F1/183Internal mounting support structures, e.g. for printed circuit boards, internal connecting means
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/1601Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/1613Constructional details or arrangements for portable computers
    • G06F1/1633Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637Details related to the display arrangement, including those related to the mounting of the display in the housing
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/18Packaging or power distribution
    • G06F1/189Power distribution
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/14Structural association of two or more printed circuits
    • H05K1/148Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1345Conductors connecting electrodes to cell terminals
    • G02F1/13452Conductors connecting driver circuitry and terminals of panels
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2200/00Indexing scheme relating to G06F1/04 - G06F1/32
    • G06F2200/16Indexing scheme relating to G06F1/16 - G06F1/18
    • G06F2200/161Indexing scheme relating to constructional details of the monitor
    • G06F2200/1612Flat panel monitor
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/04Assemblies of printed circuits
    • H05K2201/049PCB for one component, e.g. for mounting onto mother PCB
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/321Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives
    • H05K3/323Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives by applying an anisotropic conductive adhesive layer over an array of pads
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/36Assembling printed circuits with other printed circuits
    • H05K3/361Assembling flexible printed circuits with other printed circuits

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a display panel, a method of manufacturing the same, and a display device mounted with the display panel.
  • the high screen-to-body ratio of display devices is a development trend, and one of the directions is to use narrow-frame display panels.
  • the wide border of the display device cannot achieve a high screen ratio.
  • some display devices can narrow the frame, due to the limitation of the manufacturing process, the accuracy is low and the yield is low.
  • the purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art with lower accuracy and lower yield, and to provide a display panel with higher accuracy and higher yield, a preparation method thereof, and a display device equipped with the display panel.
  • a display panel including:
  • a first flexible circuit board electrically connected to the array substrate
  • a non-flexible circuit board electrically connected to the first flexible circuit board
  • the control circuit board is provided on the non-flexible circuit board and is electrically connected to the non-flexible circuit board;
  • the second flexible circuit board is electrically connected to the non-flexible circuit board.
  • the non-flexible circuit board is a rigid printed circuit board.
  • the display panel further includes:
  • the first anisotropic conductive adhesive film is provided between the array substrate and the first flexible circuit board.
  • the display panel further includes:
  • the second anisotropic conductive adhesive film is provided between the first flexible circuit board and the non-flexible circuit board.
  • the display panel further includes:
  • the third anisotropic conductive adhesive film is provided between the control circuit board and the non-flexible circuit board.
  • the display panel further includes:
  • the fourth anisotropic conductive adhesive film is provided between the non-flexible circuit board and the second flexible circuit board.
  • the first connection portion of the first flexible circuit board is adhered to the array substrate.
  • the second connection portion of the first flexible circuit board is adhered to the non-flexible circuit board.
  • connection portion of the second flexible circuit board is adhered to the non-flexible circuit board.
  • the display panel further includes:
  • the connector is electrically connected to the second flexible circuit board.
  • a display device including:
  • the display panel according to any one of the above.
  • a method for manufacturing a display panel including:
  • a second flexible circuit board is provided, and the second flexible circuit board is electrically connected to the non-flexible circuit board.
  • the display panel of the present disclosure connects the array substrate and the non-flexible circuit board through the first flexible circuit board, connects the first and second flexible circuit boards through the non-flexible circuit board, and the control circuit board is provided on the non-flexible circuit board .
  • the array substrate is connected to the first flexible circuit board, and the first flexible circuit board can be bent during packaging, and the control circuit board is not provided on the array substrate, so that the width of the array substrate can be reduced, and a narrow border can be realized;
  • the first flexible circuit board and the second flexible circuit board are connected through a non-flexible circuit board to avoid soft-to-soft bonding and improve the bonding accuracy;
  • the control circuit board is provided on the non-flexible circuit board to avoid Instability caused by large difference in thermal expansion coefficient and low manufacturing yield.
  • FIG. 1 is a schematic structural diagram of an embodiment of a display panel in the related art
  • Figure 2 is a schematic top view of Figure 1;
  • FIG. 3 is a schematic structural diagram of another embodiment of a display panel in the related art.
  • FIG. 4 is a schematic top view of FIG. 3;
  • FIG. 5 is a schematic structural diagram of an embodiment of a display panel of the present disclosure.
  • FIG. 6 is a schematic top view of FIG. 5;
  • FIG. 7 is a schematic flowchart of an embodiment of a method for manufacturing a display panel of the present disclosure.
  • the broken line in the figure is the dividing line between the display area and the frame area;
  • the display panel includes an array substrate 1, which is provided on the array substrate 1
  • the color filter substrate 2 is provided on the array substrate 1 and is connected to the control circuit board 8 connected to the array substrate 1, and a flexible circuit board 13 connected to the array substrate 1.
  • the flexible circuit board 13 is a main flexible circuit board.
  • the flexible circuit board 13 can be bent during packaging without affecting the frame width of the display panel.
  • the width of the frame on the terminal side of the display panel (the width from the display area of the display panel to the outermost edge of the display panel) is composed of the five dimensions A, B, C, D, and E.
  • the outermost pitch size, B size is the pitch size from the outermost edge of the color filter substrate 2 to the control circuit board 8
  • C size is the width of the control circuit board 8
  • D size is the pitch size from the control circuit board 8 to the flexible circuit board 13
  • the E size is the width of the flexible circuit board 13 bonded to the array substrate 1 of the display panel. According to the current process limit frame width ⁇ 3.7mm. It can be obtained from FIG. 1 that the width of the display panel frame is the width of the highlighted display area of the array substrate 1. Both the control circuit board 8 and the flexible circuit board 13 need to be connected to the array substrate 1. Therefore, the display panel cannot realize the ultra-narrow frame design to achieve Higher screen ratio.
  • FIG. 3 and FIG. 4 are structural schematic diagrams of another embodiment of the display panel in the related art shown in the related art.
  • the dotted line in the figure is the dividing line between the display area and the frame area;
  • the display panel includes an array substrate 1 provided on the array substrate 1
  • the color filter substrate 2 the first flexible circuit board 5 provided on the array substrate 1 and connected to the array substrate 1, the control circuit board 8 provided on the first flexible circuit board 5, and the first flexible circuit board 5
  • the second flexible circuit board 6 is connected, and the second flexible circuit board 6 is a main flexible circuit board. Both the first flexible circuit board 5 and the second flexible circuit board 6 can be bent during packaging without affecting the frame width of the display panel.
  • the width of the frame on the terminal side of the display panel (the width from the display area of the display panel to the outermost edge of the display panel) is composed of the three dimensions F, G, and H, where F is the distance from the display area to the outermost edge of the color filter substrate 2
  • F is the distance from the display area to the outermost edge of the color filter substrate 2
  • the size, the G size is the distance between the outermost edge of the color filter substrate 2 and the first flexible circuit board 5
  • the H size is the width of the first flexible circuit board 5 bonded to the array substrate 1 of the display panel.
  • the width of the control circuit board 8 and the distance between the control circuit board 8 and the flexible circuit board are saved.
  • the width of the frame can be reduced by about 1.5mm, so that a narrow frame design can be realized and a higher screen ratio can be achieved.
  • control circuit board 8 and the first flexible circuit board 5 need to be continuously heated to 400 degrees Celsius during the production process, and the thermal expansion coefficient of the first flexible circuit board 5 is about 16um/m/°C.
  • the control circuit board 8 The coefficient of thermal expansion is about 2.49um/m/°C, the difference between the two is large, the bonding is relatively unstable, the manufacturing yield is low, and the precision requirements of the bonding machine are high.
  • the first flexible circuit board 5 and the second flexible circuit board 6 are soft-to-soft bonding, the bonding accuracy is not easy to control, and the equipment accuracy is very high. The existing equipment cannot meet the process requirements, and the equipment investment needs to be increased. cost.
  • the present disclosure first provides a display panel.
  • FIG. 5 and FIG. 6 for a schematic structural view of an embodiment of the display panel of the present disclosure.
  • the broken line in the figure is the dividing line between the display area and the frame area; the display panel may include an array substrate 1.
  • the first flexible circuit board 5 is electrically connected to the array substrate 1;
  • the non-flexible circuit board 7 is electrically connected to the first flexible circuit board 5;
  • the control circuit board 8 is provided on the non-flexible circuit board 7 and
  • the non-flexible circuit board 7 is electrically connected;
  • the second flexible circuit board 6 is electrically connected to the non-flexible circuit board 7.
  • the color filter substrate 2 is provided on the array substrate 1, and the first polarizer 3 is provided under the array substrate 1; the second polarizer 4 is provided on the color filter substrate 2.
  • the display panel On the terminal side of the display panel, one side of the array substrate 1 protrudes from the color filter substrate 2, and an end of the array substrate 1 protruding from the color filter substrate 2 is provided with a first flexible circuit board 5.
  • the first flexible circuit board 5 is provided with a first connection portion and a second connection portion, the first connection portion and the second connection portion are both provided on the lower surface of the first flexible circuit board 5, and the first A connecting portion and a second connecting portion are located at opposite ends of the first flexible circuit board 5.
  • the first connection portion of the first flexible circuit board 5 is adhered to the upper surface of the array substrate 1 through the first anisotropic conductive adhesive film 9.
  • the second connection portion of the first flexible circuit board 5 is adhered to the upper surface of the non-flexible circuit board 7 through the second anisotropic conductive adhesive film 10.
  • the first flexible circuit board 5 can be bent during packaging, and there is a set distance between the array substrate 1 and the non-flexible circuit board 7, and the size of the set distance can ensure that the first flexible circuit board 5 is bent.
  • both the first connection portion and the second connection portion may be provided on the upper surface of the first flexible circuit board 5 so that the first flexible circuit board 5 and the array substrate 1 and the non-flexible The lower surface of the circuit board 7 is connected.
  • the lower surface of the control circuit board 8 is adhered to the upper surface of the inflexible circuit board 7 through the third anisotropic conductive adhesive film 11.
  • the control circuit board 8 is a hard printed circuit board.
  • the upper surface of the control circuit board 8 may also be adhered to the lower surface of the inflexible circuit board 7 through the third anisotropic conductive adhesive film 11.
  • the width of the frame on the terminal side of the display panel (the width from the display area of the display panel to the outermost edge of the display panel) is composed of the three sizes M, N, and L, where the M size ranges from the display area to the color.
  • the distance between the outermost edge of the film substrate 2, the N dimension is the distance between the outermost edge of the color filter substrate 2 and the first flexible circuit board 5, and the L dimension is the width of the first flexible circuit board 5 bonded to the array substrate 1 of the display panel .
  • the array substrate 1 is connected to the first flexible circuit board 5, the first flexible circuit board 5 can be bent during packaging, and the control circuit board 8 is not provided on the array substrate 1, so that the width of the array substrate 1 can be reduced, that is, narrow frame.
  • the second flexible circuit board 6 is also provided with a connection portion, the connection portion is located on the lower surface of the second flexible circuit board 6, and the connection portion of the second flexible circuit board 6 passes through the fourth anisotropic conductive adhesive
  • the film 12 is adhered to the upper surface of the non-flexible circuit board 7, and the second flexible circuit board 6 is located at the end of the non-flexible circuit board 7 facing away from the first flexible circuit board 5.
  • the connection portion is located at an end of the second flexible circuit board 6 facing away from the non-flexible circuit board 7.
  • the second flexible circuit board 6 is a main flexible circuit board, and a connector 14 is provided on the second flexible circuit board 6, and can be connected to an external signal source through the connector 14, so as to realize circuit control of an external input signal to the display panel.
  • the connector 14 can be a snap-type connector, which can be connected to an external device by a snap method; it can also be a plug-in connector, which can be connected to an external device by a plug method; this exemplary implementation There are no special restrictions on this in the example. Connect the first flexible circuit board 5 and the second flexible circuit board 6 through the non-flexible circuit board 7 to avoid soft-to-soft bonding and improve the bonding accuracy, and the accuracy of the equipment is not high, the existing equipment can meet the process requirements , No need to increase equipment investment costs.
  • the control circuit board 8 is provided on the non-flexible circuit board 7 and the thermal expansion coefficients of the control circuit board 8 and the non-flexible circuit board 7 are not much different.
  • the thermal expansion coefficient of the control circuit board is about 2.49um/m/°C instead of
  • the material of the flexible circuit board 7 is usually 3-3.5um/m/°C of glass, and the difference between the thermal expansion coefficients of the control circuit board and the non-flexible circuit board is less than a preset threshold, which is the thermal expansion of the control circuit board
  • the coefficient is 40%, to avoid instability caused by large difference in thermal expansion coefficient, and low manufacturing yield.
  • the present disclosure also provides a manufacturing method of a display panel, referring to the schematic flowchart of the manufacturing method of the display panel of the present disclosure shown in FIG. 7; the manufacturing method may include the following steps:
  • Step S10 an array substrate 1 is provided.
  • step S20 a first flexible circuit board 5 is provided, and the first flexible circuit board 5 is electrically connected to the array substrate 1.
  • step S30 a non-flexible circuit board 7 is provided, and the non-flexible circuit board 7 is electrically connected to the first flexible circuit board 5.
  • step S40 a control circuit board 8 is provided, and the control circuit board 8 is electrically connected to the non-flexible circuit board 7.
  • step S50 a second flexible circuit board 6 is provided, and the second flexible circuit board 6 is electrically connected to the non-flexible circuit board 7.
  • the array substrate 1 and the non-flexible circuit board 7 are provided, so that a set distance is maintained between the array substrate 1 and the non-flexible circuit board 7, and the heating and pressurization conditions are conducted through the anisotropic conductive adhesive
  • the first flexible circuit board 5 is bonded between the array substrate 1 and the non-flexible circuit board 7.
  • the control circuit board 8 is adhered to the non-flexible circuit board 7 under the conditions of heat and pressure using anisotropic conductive paste.
  • the second flexible circuit board 6 is adhered to the non-flexible circuit board 7 under the conditions of heat and pressure by using anisotropic conductive adhesive.
  • the first connection portion of the first flexible circuit board 5 may be bonded to the array substrate 1 first, and then the second connection portion of the first flexible circuit board 5 may be bonded to the non-flexible Circuit board 7; Then, the control circuit board 8 is adhered to the non-flexible circuit board 7; Finally, the second flexible circuit board 6 is adhered to the non-flexible circuit board 7. After the bonding between the first flexible circuit board 5, the non-flexible circuit board 7, the control circuit board 8 and the second flexible circuit board 6, the first flexible circuit board 5 may be bonded to the array substrate 1.
  • the present disclosure also provides a display device including the above-mentioned display panel.
  • the specific structure of the display panel has been described in detail above, so it will not be repeated here.
  • the terms “a”, “a”, “the” and “said” are used to indicate the presence of one or more elements/components/etc.; the terms “including”, “including” and “having” are used to Means open-ended inclusive and means that there can be additional elements/components/etc in addition to the listed elements/components/etc; the terms “first”, “second” and “third “Is only used as a mark, not to limit the number of objects.

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  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract

一种显示面板,包括阵列基板(1)、第一柔性电路板(5)、非柔性电路板(7)、控制电路板(8)以及第二柔性电路板(6);第一柔性电路板(5)电连接于阵列基板(1);非柔性电路板(7)电连接于第一柔性电路板(5);控制电路板(8)设于非柔性电路板(7)之上,并与非柔性电路板(7)电连接;第二柔性电路板(6)电连接于非柔性电路板(7)。显示面板实现了窄边框,提高了贴合精度,避免了热膨胀系数相差较大造成的不稳定,提高了制造良率。

Description

显示面板及其制备方法、显示装置
交叉引用
本申请要求于2019年1月7日提交的申请号为201910013115.7的中国专利申请的优先权,该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及显示技术领域,尤其涉及一种显示面板及其制备方法、安装有该显示面板的显示装置。
背景技术
在显示领域,显示装置的高屏占比是发展趋势,其中一个方向就是使用窄边框化的显示面板。
目前,显示装置的边框较宽无法实现高屏占比。有些显示装置虽然能够缩窄边框,但是,由于制作工艺的限制导致精度较低、良率较低。
因此,有必要研究一种新的显示面板及其制备方法、安装有该显示面板的显示装置。
所述背景技术部分公开的上述信息仅用于加强对本公开的背景的理解,因此它可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本公开的目的在于克服上述现有技术的精度较低、良率较低的不足,提供一种精度较高、良率较高的显示面板及其制备方法、安装有该显示面板的显示装置。
本公开的额外方面和优点将部分地在下面的描述中阐述,并且部分地将从描述中变得显然,或者可以通过本公开的实践而习得。
根据本公开的一个方面,提供一种显示面板,包括:
阵列基板;
第一柔性电路板,电连接于所述阵列基板;
非柔性电路板,电连接于所述第一柔性电路板;
控制电路板,设于所述非柔性电路板之上,并与所述非柔性电路板电连接;
第二柔性电路板,电连接于所述非柔性电路板。
在本公开的一种示例性实施例中,所述非柔性电路板为硬质印刷电路板。
在本公开的一种示例性实施例中,所述显示面板还包括:
第一异方性导电胶膜,设于所述阵列基板与所述第一柔性电路板之间。
在本公开的一种示例性实施例中,所述显示面板还包括:
第二异方性导电胶膜,设于所述第一柔性电路板与所述非柔性电路板之间。
在本公开的一种示例性实施例中,所述显示面板还包括:
第三异方性导电胶膜,设于所述控制电路板与所述非柔性电路板之间。
在本公开的一种示例性实施例中,所述显示面板还包括:
第四异方性导电胶膜,设于所述非柔性电路板与所述第二柔性电路板之间。
在本公开的一种示例性实施例中,所述第一柔性电路板的第一连接部粘接于所述阵列基板之上。
在本公开的一种示例性实施例中,所述第一柔性电路板的第二连接部粘接于所述非柔性电路板之上。
在本公开的一种示例性实施例中,所述第二柔性电路板的连接部粘接于所述非柔性电路板之上。
在本公开的一种示例性实施例中,所述显示面板还包括:
连接器,电连接于所述第二柔性电路板。
根据本公开的一个方面,提供一种显示装置,包括:
上述任意一项所述的显示面板。
根据本公开的一个方面,提供一种显示面板的制备方法,包括:
提供阵列基板;
提供第一柔性电路板,使所述第一柔性电路板电连接于所述阵列基板;
提供非柔性电路板,使所述非柔性电路板电连接于所述第一柔性电路板;
提供控制电路板,使所述控制电路板电连接于所述非柔性电路板之上;
提供第二柔性电路板,使所述第二柔性电路板电连接于所述非柔性电路板。
由上述技术方案可知,本公开具备以下优点和积极效果中的至少之一:
本公开的显示面板,通过第一柔性电路板连接阵列基板和非柔性电路板,通过非柔性电路板连接第一柔性电路板和第二柔性电路板,控制电路板设于非柔性电路板之上。一方面,阵列基板连接第一柔性电路板,在封装时第一柔性电路板可以折弯,而且控制电路板没有设置在阵列基板上,使阵列基板的宽度可以缩小,即可实现窄边框;另一方面,通过非柔性电路板连接第一柔性电路板和第二柔性电路板,避免软对软贴合,提高贴合精度;再一方面,控制电路板设于非柔性电路板之上,避免热膨胀系数相差较大造成的不稳定、制造良率低。
附图说明
通过参照附图详细描述其示例实施方式,本公开的上述和其它特征及优点将变得更加明显。
图1是相关技术中显示面板一实施方式的结构示意图;
图2是图1的俯视示意图;
图3是相关技术中显示面板另一实施方式的结构示意图;
图4是图3的俯视示意图;
图5是本公开显示面板一实施方式的结构示意图;
图6是图5的俯视示意图;
图7是本公开显示面板的制备方法一实施方式的流程示意图。
图中主要元件附图标记说明如下:
1、阵列基板;2、彩膜基板;3、第一偏光片;4、第二偏光片;5、第一柔性电路板;6、第二柔性电路板;7、非柔性电路板;8、控制电路板;9、第一异方性导电胶膜;10、第二异方性导电胶膜;11、第三异方性导电胶膜;12、第四异方性导电胶膜;13、柔性电路板;14、连接器。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而,示例实施方式能够以多种形式实施,且不应被理解为限于在此阐述的实施方式;相反,提供这些实施方式使得本公开将全面和完整,并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构,因而将省略它们的详细描述。
参照图1以及图2所示的相关技术中显示面板一实施方式的结构示意图,图中虚线为显示区域与边框区域的分割线;该显示面板包括阵列基板1,设于阵列基板1之上的彩膜基板2,设于阵列基板1之上并与阵列基板1连接的控制电路板8,以及与阵列基板1连接的柔性电路板13,柔性电路板13为主柔性电路板。柔性电路板13在封装时可以折弯,不影响显示面板的边框宽度。显示面板端子侧的边框宽度(显示面板显示区到显示面板最外边缘的宽度)由A、B、C、D、E五个尺寸相加构成,其中,A尺寸为显示区到彩膜基板2最外边的间距尺寸,B尺寸为彩膜基板2最外边到控制电路板8的间距尺寸,C尺寸为控制电路板8的宽度,D尺寸为控制电路板8到柔性电路板13的间距尺寸,E尺寸为柔性电路板13在显示面板的阵列基板1上粘接的宽度。按照目前的工艺极限边框宽度≥3.7mm。从图1中可以得到显示面板边框宽度为阵列基板1突出显示区域的宽度,控制电路板8和柔性电路板13均需要与阵列基板1连接,因此,该显示面板无法实现超窄边框设计从而实现更高的屏占比。
图3以及图4所示的相关技术中显示面板另一实施方式的结构示意图,图中虚线为显示区域与边框区域的分割线;该显示面板包括阵列基板1,设于阵列基板1之上的彩膜基板2,设于阵列基板1之上并与阵列基板1连接的第一柔性电路板5,设于第一柔性电路板5之上的控制电路板8,以及与第一柔性电路板5连接的第二柔性电路板6,第二柔性电路板6为 主柔性电路板。第一柔性电路板5和第二柔性电路板6在封装时均可以折弯,不影响显示面板的边框宽度。显示面板端子侧的边框宽度(显示面板显示区到显示面板最外边缘的宽度)由F、G、H三个尺寸相加构成,其中,F尺寸为显示区到彩膜基板2最外边的间距尺寸,G尺寸为彩膜基板2最外边到第一柔性电路板5的间距尺寸,H尺寸为第一柔性电路板5在显示面板的阵列基板1上粘接的宽度。相对于图1中的实施方式节省了控制电路板8的宽度以及控制电路板8距离柔性电路板的间距尺寸。边框宽度可以缩小边框1.5mm左右,从而可以实现窄边框设计,实现更高的屏占比。但是,控制电路板8与第一柔性电路板5卷对卷粘接生产过程中需要持续加热至400摄氏度,而第一柔性电路板5的热膨胀系数约为16um/m/℃,控制电路板8的热膨胀系数约为2.49um/m/℃,两者相差较大,贴合后较为不稳定、制造良率低、而且对粘接机台精度要求高。再者,第一柔性电路板5与第二柔性电路板6为软对软贴合,贴合精度不易控制,而且对设备精度要求很高,现有设备不能满足该工艺要求,需要增加设备投入成本。
本公开首先提供了一种显示面板,参照图5以及图6所示的本公开显示面板一实施方式的结构示意图,图中虚线为显示区域与边框区域的分割线;该显示面板可以包括阵列基板1、第一柔性电路板5、非柔性电路板7、控制电路板8以及第二柔性电路板6。第一柔性电路板5电连接于所述阵列基板1;非柔性电路板7电连接于所述第一柔性电路板5;控制电路板8设于所述非柔性电路板7之上,并与所述非柔性电路板7电连接;第二柔性电路板6电连接于所述非柔性电路板7。
在本示例实施方式中,在阵列基板1之上设置有彩膜基板2,在阵列基板1之下设置有第一偏光片3;在彩膜基板2之上设置有第二偏光片4。在显示面板的端子侧,阵列基板1的一侧突出于彩膜基板2,在阵列基板1突出于彩膜基板2的端部设置有第一柔性电路板5。
在本示例实施方式中,第一柔性电路板5上设置有第一连接部和第二连接部,第一连接部和第二连接部均设置在第一柔性电路板5的下表面,且第一连接部和第二连接部位于第一柔性电路板5的相对的两端部。第一柔性电路板5的第一连接部通过第一异方性导电胶膜9粘接于阵列 基板1的上表面。第一柔性电路板5的第二连接部通过第二异方性导电胶膜10粘接于非柔性电路板7的上表面。第一柔性电路板5在封装时可以折弯,阵列基板1与非柔性电路板7之间具有设定距离,该设定距离的大小可以保证第一柔性电路板5折弯即可。在本公开的其他示例实施方式中,也可以将第一连接部和第二连接部均设置在第一柔性电路板5的上表面,从而使第一柔性电路板5与阵列基板1和非柔性电路板7的下表面连接。
在本示例实施方式中,控制电路板8的下表面通过第三异方性导电胶膜11粘接于非柔性电路板7的上表面。控制电路板8为硬质印刷电路板。在本公开的其他示例实施方式中,也可以将控制电路板8的上表面通过第三异方性导电胶膜11粘接于非柔性电路板7的下表面。
在本示例实施方式中,显示面板端子侧的边框宽度(显示面板显示区到显示面板最外边缘的宽度)由M、N、L三个尺寸相加构成,其中,M尺寸为显示区到彩膜基板2最外边的间距尺寸,N尺寸为彩膜基板2最外边到第一柔性电路板5的间距尺寸,L尺寸为第一柔性电路板5在显示面板的阵列基板1上粘接的宽度。阵列基板1连接第一柔性电路板5,在封装时第一柔性电路板5可以折弯,而且控制电路板8没有设置在阵列基板1上,使阵列基板1的宽度可以缩小,即可实现窄边框。
在本示例实施方式中,第二柔性电路板6上也设置有连接部,连接部位于第二柔性电路板6的下表面,第二柔性电路板6的连接部通过第四异方性导电胶膜12粘接于非柔性电路板7的上表面,且第二柔性电路板6位于非柔性电路板7的背离第一柔性电路板5的一端部。连接部位于第二柔性电路板6的背离非柔性电路板7的一端部。第二柔性电路板6为主柔性电路板,在第二柔性电路板6上设置有连接器14,通过连接器14可以与外接信号源连接,从而实现外界输入信号对显示面板进行电路控制。连接器14可以采用卡扣式的连接器,进而可以通过卡扣的方式连接至外部设备;也可以采用插接式的连接器,进而可以通过插接的方式连接至外部设备;本示例性实施例中对此不做特殊限定。通过非柔性电路板7连接第一柔性电路板5和第二柔性电路板6,避免软对软贴合,提高贴合精度,而且对设备精度要求不高,现有设备即能满足该工艺要 求,不需要增加设备投入成本。控制电路板8设于非柔性电路板7之上,控制电路板8与非柔性电路板7的热膨胀系数相差不大,所述控制电路板的热膨胀系数大约为2.49um/m/℃,而非柔性电路板7的材质通常为玻璃为3-3.5um/m/℃,控制电路板与非柔性电路板的热膨胀系数之差小于预设阈值,所述预设阈值是所述控制电路板的热膨胀系数的40%,避免热膨胀系数相差较大造成的不稳定、制造良率低。
进一步的,本公开还提供了一种显示面板的制备方法,参照图7所示的本公开显示面板的制备方法的流程示意图;该制备方法可以包括以下步骤:
步骤S10,提供阵列基板1。
步骤S20,提供第一柔性电路板5,使所述第一柔性电路板5电连接于所述阵列基板1。
步骤S30,提供非柔性电路板7,使所述非柔性电路板7电连接于所述第一柔性电路板5。
步骤S40,提供控制电路板8,使所述控制电路板8电连接于所述非柔性电路板7之上。
步骤S50,提供第二柔性电路板6,使所述第二柔性电路板6电连接于所述非柔性电路板7。
在本示例实施方式中,首先,提供阵列基板1以及非柔性电路板7,使阵列基板1与非柔性电路板7之间保持设定距离,通过异方性导电胶在加热、加压条件下将第一柔性电路板5粘接于阵列基板1和非柔性电路板7之间。然后,通过异方性导电胶在加热、加压条件下将控制电路板8粘接于非柔性电路板7之上。最后,通过异方性导电胶在加热、加压条件下将第二柔性电路板6粘接于非柔性电路板7之上。在本公开的其他示例实施方式中,也可以先将第一柔性电路板5的第一连接部粘接于阵列基板1,再将第一柔性电路板5的第二连接部粘接于非柔性电路板7;然后,将控制电路板8粘接于非柔性电路板7之上;最后,将第二柔性电路板6粘接于非柔性电路板7之上。还可以完成第一柔性电路板5、非柔性电路板7、控制电路板8以及第二柔性电路板6之间的粘接后,将第一柔性电路板5粘接于阵列基板1。
进一步的,本公开还提供了一种显示装置,该显示装置包括上述所述的显示面板。显示面板的具体结构上述已经进行了详细说明,因此,此处不再赘述。
上述所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施方式中,如有可能,各实施例中所讨论的特征是可互换的。在上面的描述中,提供许多具体细节从而给出对本公开的实施方式的充分理解。然而,本领域技术人员将意识到,可以实践本公开的技术方案而没有所述特定细节中的一个或更多,或者可以采用其它的方法、组件、材料等。在其它情况下,不详细示出或描述公知结构、材料或者操作以避免模糊本公开的各方面。
本说明书中使用“约”“大约”的用语通常表示在一给定值或范围的20%之内,较佳是10%之内,且更佳是5%之内。在此给定的数量为大约的数量,意即在没有特定说明的情况下,仍可隐含“约”“大约”“大致”“大概”的含义。
虽然本说明书中使用相对性的用语,例如“上”“下”来描述图标的一个组件对于另一组件的相对关系,但是这些术语用于本说明书中仅出于方便,例如根据附图中所述的示例的方向。能理解的是,如果将图标的装置翻转使其上下颠倒,则所叙述在“上”的组件将会成为在“下”的组件。其他相对性的用语,例如“高”“低”“顶”“底”等也作具有类似含义。当某结构在其它结构“上”时,有可能是指某结构一体形成于其它结构上,或指某结构“直接”设置在其它结构上,或指某结构通过另一结构“间接”设置在其它结构上。
本说明书中,用语“一个”、“一”、“该”和“所述”用以表示存在一个或多个要素/组成部分/等;用语“包含”、“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等;用语“第一”、“第二”和“第三”等仅作为标记使用,不是对其对象的数量限制。
应可理解的是,本公开不将其应用限制到本说明书提出的部件的详细结构和布置方式。本公开能够具有其他实施方式,并且能够以多种方式实现并且执行。前述变形形式和修改形式落在本公开的范围内。应可理解的 是,本说明书公开和限定的本公开延伸到文中和/或附图中提到或明显的两个或两个以上单独特征的所有可替代组合。所有这些不同的组合构成本公开的多个可替代方面。本说明书所述的实施方式说明了已知用于实现本公开的最佳方式,并且将使本领域技术人员能够利用本公开。

Claims (15)

  1. 一种显示面板,包括:
    阵列基板;
    第一柔性电路板,电连接于所述阵列基板;
    非柔性电路板,电连接于所述第一柔性电路板;
    控制电路板,设于所述非柔性电路板之上,并与所述非柔性电路板电连接;
    第二柔性电路板,电连接于所述非柔性电路板。
  2. 根据权利要求1所述的显示面板,所述非柔性电路板为硬质印刷电路板。
  3. 根据权利要求1或2所述的显示面板,所述控制电路板与所述非柔性电路板的热膨胀系数之差小于预设阈值。
  4. 根据权利要求1-3中任一所述的显示面板,第一柔性电路板设置于所述阵列基板与所述非柔性电路板之间,所述第一柔性电路板用于在所述显示面板封装时折弯。
  5. 根据权利要求1-3中任一所述的显示面板,所述阵列基板与所述非柔性电路板之间具有设定距离,用于提供所述第一柔性电路板的折弯空间。
  6. 根据权利要求1-5中任一所述的显示面板,所述显示面板还包括:
    第一异方性导电胶膜,设于所述阵列基板与所述第一柔性电路板之间。
  7. 根据权利要求1-6中任一所述的显示面板,所述显示面板还包括:
    第二异方性导电胶膜,设于所述第一柔性电路板与所述非柔性电路板之间。
  8. 根据权利要求1-7中任一所述的显示面板,所述显示面板还包括:
    第三异方性导电胶膜,设于所述控制电路板与所述非柔性电路板之间。
  9. 根据权利要求1-8中任一所述的显示面板,所述显示面板还包括:
    第四异方性导电胶膜,设于所述非柔性电路板与所述第二柔性电路板之间。
  10. 根据权利要求1-9中任一所述的显示面板,所述第一柔性电路板的第一连接部粘接于所述阵列基板之上。
  11. 根据权利要求1-10中任一所述的显示面板,所述第一柔性电路板的第二连接部粘接于所述非柔性电路板之上。
  12. 根据权利要求1-11中任一所述的显示面板,所述第二柔性电路板的连接部粘接于所述非柔性电路板之上。
  13. 根据权利要求1-12中任一所述的显示面板,所述显示面板还包括:
    连接器,电连接于所述第二柔性电路板。
  14. 一种显示装置,包括:
    权利要求1~13任意一项所述的显示面板。
  15. 一种显示面板的制备方法,包括:
    提供阵列基板;
    提供第一柔性电路板,使所述第一柔性电路板电连接于所述阵列基板;
    提供非柔性电路板,使所述非柔性电路板电连接于所述第一柔性电路板;
    提供控制电路板,使所述控制电路板电连接于所述非柔性电路板之上;
    提供第二柔性电路板,使所述第二柔性电路板电连接于所述非柔性电路板。
PCT/CN2019/112589 2019-01-07 2019-10-22 显示面板及其制备方法、显示装置 WO2020143268A1 (zh)

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