WO2021174606A1 - 显示装置及其背板 - Google Patents

显示装置及其背板 Download PDF

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Publication number
WO2021174606A1
WO2021174606A1 PCT/CN2020/080881 CN2020080881W WO2021174606A1 WO 2021174606 A1 WO2021174606 A1 WO 2021174606A1 CN 2020080881 W CN2020080881 W CN 2020080881W WO 2021174606 A1 WO2021174606 A1 WO 2021174606A1
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WO
WIPO (PCT)
Prior art keywords
layer
skeleton
bars
backplane
display device
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PCT/CN2020/080881
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English (en)
French (fr)
Inventor
朱志涛
Original Assignee
武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/756,162 priority Critical patent/US11737217B2/en
Publication of WO2021174606A1 publication Critical patent/WO2021174606A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0017—Casings, cabinets or drawers for electric apparatus with operator interface units
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating 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
    • G09F9/33—Indicating 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 being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating 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
    • G09F9/301—Indicating 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates

Definitions

  • the present invention relates to the field of display technology, in particular to a display device and a backplane thereof.
  • Existing display devices mainly include organic light emitting diode (Organic Light Emitting Diode, OLED) display devices and liquid crystal displays (Liquid Crystal Display, LCD) device.
  • OLED Organic Light Emitting Diode
  • LCD Liquid Crystal Display
  • the OLED display device uses a backplane to support and protect the screen after being peeled off by a laser peeling process.
  • the inner surface of the backplane is compressed and deformed, and at the same time, a squeezing force is generated on the adjacent film layer, thereby generating a ripple phenomenon.
  • the embodiment of the present invention provides a display device and a back plate thereof, which are used to solve the problem of the ripple phenomenon of the back plate in the display device.
  • the embodiment of the present invention provides a backplane, which includes:
  • the flexible layer has a first surface and a second surface that are arranged opposite to each other;
  • the skeleton layer is arranged on the first surface, the skeleton layer includes at least two skeleton bars, the skeleton bars are arranged at intervals, and the material of the skeleton layer includes a polymer;
  • the filling layer covers the side of the framework layer away from the flexible layer, and the filling layer is embedded in the gap between two adjacent framework strips.
  • the frame bars are arranged at intervals along the first direction of the flexible layer and extend along the second direction of the flexible layer.
  • the frame bars are arranged at intervals along the second direction and extend along the first direction, wherein the frames are arranged at intervals along the first direction and extend along the second direction.
  • the skeleton bars and the skeleton bars arranged at intervals along the second direction and extending along the first direction form a grid structure.
  • the elastic modulus of the skeleton layer is greater than the elastic modulus of the filling layer.
  • the elastic modulus of the flexible layer is smaller than the elastic modulus of the skeleton layer.
  • the backplane includes a bending zone and a non-bending zone, the bending zone and the non-bending zone are arranged adjacently, and the frame adjacent to the bending zone The gap between the bars is larger than the gap between the adjacent frame bars in the non-bending area.
  • the skeleton layer is formed on the first surface by screen printing.
  • the polymer material includes polyimide, ethylene phthalate, and curing glue.
  • the material of the filling layer includes at least one of polyimide and ethylene phthalate.
  • An embodiment of the present invention also provides a display device, including a panel, a chip-on-film substrate, a flexible circuit board, a polarizer, an optical adhesive layer, a cover window, and a backplane, wherein the panel covers the backplane, and the One end of the panel is connected to the flexible circuit board through the chip on film substrate, the polarizer covers at least a part of the panel, the optical adhesive layer covers the polarizer, and the cover window covers the optical adhesive Layer, wherein the backplane includes:
  • the flexible layer has a first surface and a second surface that are arranged opposite to each other;
  • the skeleton layer is arranged on the first surface, the skeleton layer includes at least two skeleton bars, the skeleton bars are arranged at intervals, and the material of the skeleton layer includes a polymer;
  • the filling layer covers the side of the framework layer away from the flexible layer, and the filling layer is embedded in the gap between two adjacent framework strips.
  • the frame bars are arranged at intervals along the first direction of the flexible layer and extend along the second direction of the flexible layer. 12. The display device of claim 11, wherein the frame bars are arranged at intervals along the second direction and extend along the first direction, and wherein the frame bars are arranged at intervals along the first direction and extend along the second direction.
  • the frame bars extending in the direction and the frame bars arranged at intervals along the second direction and extending in the first direction form a grid structure.
  • the elastic modulus of the skeleton layer is greater than the elastic modulus of the filling layer.
  • the elastic modulus of the flexible layer is smaller than the elastic modulus of the skeleton layer.
  • the backplane includes a bending area and a non-bending area, the bending area and the non-bending area are arranged adjacent to each other, and the frame adjacent to the bending area is The gap between the bars is larger than the gap between the adjacent frame bars in the non-bending area.
  • the skeleton layer is formed on the first surface by screen printing.
  • the polymer material includes polyimide, ethylene phthalate, and curing glue.
  • the material of the filling layer includes at least one of polyimide and ethylene phthalate.
  • a skeleton layer is provided on the flexible layer, and the skeleton layer is used as a support structure of the display device. Further, a filler is provided on the skeleton layer. Layer and embedded in the gap of the skeleton layer, because the elastic modulus of the skeleton layer is greater than the elastic modulus of the filling layer.
  • the modulus of elasticity is small, which is beneficial to bending, so that during the bending process, the frame strips in the frame layer are squeezed by the filling layer, resulting in a direction that is conducive to bending, that is, the backplane provided by the present invention can be bent in a direction Folding, thereby improving the bending process of the display device, when the inner surface of the back plate is compressed and deformed, it will also produce a pressing force on the adjacent film layer to produce a wave phenomenon.
  • the gap between the frame bars in the bending area is greater than the gap between the frame bars in the non-bending area, that is, the hardness of the non-bending area is greater than the hardness of the bending area, on the one hand, the non-bending area is further increased.
  • the support strength when the zone is used as a support layer, on the other hand, is conducive to the bending of the bending zone.
  • FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the present invention.
  • Figure 2 is a schematic diagram of a backplane provided by an embodiment of the present invention.
  • FIG. 3 is a top view of a skeleton layer in a backplane provided by an embodiment of the present invention
  • FIG. 4 is another top view of the skeleton layer in the backplane provided by the embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a backplane provided by an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another structure of a backplane provided by an embodiment of the present invention.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, “multiple” means two or more than two, unless otherwise specifically defined.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • the specific meanings of the above terms in this application can be understood under specific circumstances.
  • the display device includes a panel 20, a flip chip film substrate 30, a flexible circuit board 40, a polarizer 50, an optical adhesive layer 60, a cover window 70, and a back The board 10, wherein the panel 20 covers the back plate 10, and one end of the panel 20 is connected to the flexible circuit board 40 through the chip-on-film base 30, and the polarizer 50 covers the panel At least a part of 20, the optical adhesive layer 60 covers the polarizer 50, and the cover window 70 covers the optical adhesive layer 60.
  • an embodiment of the present invention also provides a backplane.
  • the backplane 10 includes a flexible layer 100, and the flexible layer 100 has a first surface and a second surface that are opposed to each other.
  • the flexible material of the flexible layer 100 includes polyimide (PI), polyethylene terephthalate (PET), bismaleimide modified triazine resin material, and other flexible materials. Material.
  • the skeleton layer 110 is arranged on the first surface, the skeleton layer 110 includes at least two skeleton bars 1101, and the skeleton bars 1101 are arranged at intervals, wherein the width of the skeleton bars is between 0.5 ⁇ m and 5 ⁇ m. Between micrometers.
  • the material of the frame bar includes a polymer material.
  • the polymers include polydimethylsiloxane polymers, polyurethane polymers, polyamide polymers, polyester polymers, other flexible materials and curing glues.
  • the polymer materials include Polyimide, polyethylene terephthalate, curing glue.
  • the filling layer 120 covers the side of the skeleton layer 110 away from the flexible layer 100, and the filling layer 120 is embedded in the gap between two adjacent skeleton strips 110.
  • the material of the filling layer 120 includes polydimethylsiloxane polymer, polyurethane polymer, polyamide polymer, polyester polymer and other flexible materials.
  • the polymer material includes polyimide. Amine, polyethylene terephthalate.
  • the frame strips 1101 are arranged at intervals along the first direction D1 of the flexible layer 100 and extend along the second direction D2 of the flexible layer 100.
  • the elastic modulus P1 of the flexible layer 100 is smaller than the elastic modulus P2 of the skeleton layer 110.
  • the back plate 10 includes a bending area 10b and a non-bending area 10a.
  • the bending area 10b and the non-bending area 10a are arranged adjacent to each other.
  • the bending area 10b is adjacent to the frame strip 1101
  • the gap d1 therebetween is greater than the gap d2 between the adjacent frame bars 1101 of the non-bending area 10a.
  • the elastic modulus of the bending zone 10b is smaller than the elastic modulus of the non-bending zone 10a, that is, the hardness of the bending zone 10b is smaller than the hardness of the non-bending zone 10a, which is beneficial to increase the support when the back plate 10 is used as a support layer.
  • Strength and is conducive to the directional bending of the bending zone 10.
  • the elastic modulus P2 of the skeleton layer 110 is greater than the elastic modulus P2 of the filling layer 120. Specifically, the greater the elastic modulus, the greater the rigidity, which is beneficial to increase the support strength of the backplane 10 when used as a support layer. 5, in the embodiment of the present invention, the skeleton layer 110 is used as the middle layer of the back plate 10.
  • the back plate 10 Since the elastic modulus P2 of the skeleton layer 110 is greater than the elastic modulus P3 of the filling layer 120, the back plate 10 is bent
  • the skeleton layer 100 is not conducive to bending, and because the filling layer 120 is more flexible, when it is squeezed, it produces a direction conducive to bending, that is, the back plate 10 provided by the embodiment of the present invention can make the back plate bend in a directional direction. Therefore, during the bending process of the display device, when the inner surface of the back plate is compressed and deformed, it also generates a pressing force on the adjacent film layer to produce a ripple phenomenon.
  • the shape of the skeleton strip 1101 includes a square shape and a trapezoid shape (in a cross-sectional view).
  • a trapezoid shape in a cross-sectional view.
  • the shape of the frame strip 1101 is not limited to a square or trapezoid, but also includes other shapes, such as a circle, an ellipse, and the like.
  • the frame bars 1101 are arranged at intervals along the second direction D2 and extend along the first direction D1, wherein, along the first direction
  • the skeleton bars 1101 arranged at intervals D1 and extending along the second direction D2 and the skeleton bars 1101 arranged at intervals along the second direction D2 and extending along the first direction D1 form a grid structure.
  • the grid structure of the bending area 10b is larger than the grid structure of the non-bending area 10a.
  • the elastic modulus of the bending area 10b is smaller than the elastic modulus of the non-bending area 10a, which further increases the support strength of the back plate 10 as a support layer, and facilitates the bending of the bending area 10.
  • the skeleton layer 110 is formed on the first surface by screen printing.
  • the framework layer 110 can also be formed on the first surface of the flexible layer 100 by other methods, for example, a framework material layer is formed on the flexible layer 100 by chemical vapor deposition or plasma enhanced physical vapor deposition, and then by grinding and engraving The framework layer 110 is formed by etching and other methods.
  • the angle formed by the first direction D1 and the second direction D2 ranges from 0 degrees to 180 degrees, that is, along the first direction
  • the angle between the frame strips 1101 arranged at intervals and extending along the second direction D2 and the frame strips 1101 arranged at intervals along the second direction D2 and extending along the first direction D1 is between 0 degrees and 180. Between degrees.
  • the figure is only an example, and the present invention also includes other examples.
  • the grid structure formed is a parallelogram structure.
  • a skeleton layer is provided on the flexible layer, and the skeleton layer is used as a support structure of the display device. Further, a filler is provided on the skeleton layer. Layer and embedded in the gap of the skeleton layer, because the elastic modulus of the skeleton layer is greater than the elastic modulus of the filling layer.
  • the modulus of elasticity is small, which is beneficial to bending, so that during the bending process, the frame strips in the frame layer are squeezed by the filling layer, resulting in a direction that is conducive to bending, that is, the backplane provided by the present invention can be bent in a direction Folding, thereby improving the bending process of the display device, when the inner surface of the back plate is compressed and deformed, it will also produce a pressing force on the adjacent film layer to produce a wave phenomenon.
  • the gap between the frame bars in the bending area is greater than the gap between the frame bars in the non-bending area, that is, the hardness of the non-bending area is greater than the hardness of the bending area, on the one hand, the non-bending area is further increased.
  • the support strength when the zone is used as a support layer, on the other hand, is conducive to the bending of the bending zone.

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Abstract

本发明提供一种显示装置及其背板，包括：柔性层，具有相对设置的第一面和第二面；骨架层，设置在所述第一面，所述骨架层包括至少两个骨架条，所述骨架条间隔设置，其中，所述骨架层的材料包括聚合物；填充层，覆盖在所述骨架层远离所述柔性层的一侧，且所述填充层嵌入相邻两所述骨架条之间的间隙处。

Description

显示装置及其背板 技术领域
本发明涉及显示技术领域，尤其涉及一种显示装置及其背板。
 背景技术
现有的显示装置主要包括有机发光二极管（Organic Light Emitting Diode，OLED）显示装置和液晶显示（Liquid Crystal Display，LCD）装置。随着柔性和可折叠式智能手机需求量的增加，以及平板电脑和可穿戴电子设备等搭载可折叠显示器的发展，刺激了柔性可折叠显示面板大幅发展。
目前，OLED显示装置经过激光剥离工艺将剥离后使用背板来支撑并保护屏幕。在折叠屏幕的过程中，背板的内表面受压产生变形的同时也会对相邻膜层产生挤压力，从而产生波纹现象。
故，有必要提出一种新的技术方案，以解决上述技术问题。
 技术问题
本发明实施例提供一种显示装置及其背板，用于解决显示装置中背板产生波纹现象的问题。
 技术解决方案
本发明实施例提供一种背板，其中，包括：
柔性层，具有相对设置的第一面和第二面；
骨架层，设置在所述第一面，所述骨架层包括至少两个骨架条，所述骨架条间隔设置，其中，所述骨架层的材料包括聚合物；
填充层，覆盖在所述骨架层远离所述柔性层的一侧，且所述填充层嵌入相邻两所述骨架条之间的间隙处。
在本发明实施例提供的背板中，所述骨架条沿所述柔性层的第一方向间隔排列，并沿所述柔性层的第二方向延伸。
在本发明实施例提供的背板中，所述骨架条沿所述第二方向间隔排列，并沿所述第一方向延伸，其中，沿所述第一方向间隔排列并沿第二方向延伸的所述骨架条与沿所述第二方向间隔排列并沿所述第一方向延伸的所述骨架条形成网格结构。
在本发明实施例提供的背板中，所述骨架层的弹性模量大于所述填充层的弹性模量。
在本发明实施例提供的背板中，所述柔性层的弹性模量小于所述骨架层的弹性模量。
在本发明实施例提供的背板中，所述背板包括弯折区和非弯折区，所述弯折区和非弯折区相邻设置，所述弯折区相邻的所述骨架条之间的间隙大于所述非弯折区相邻的所述骨架条之间的间隙。
在本发明实施例提供的背板中，所述骨架层通过丝网印刷形成在所述第一面。
在本发明实施例提供的背板中，所述聚合物材料包括聚酰亚胺、苯二甲酸乙二醇酯和固化胶。
在本发明实施例提供的背板中，所述填充层的材料包括聚酰亚胺和苯二甲酸乙二醇酯中的至少一种。
本发明实施例还提供一种显示装置，包括面板、覆晶薄膜基板、柔性电路板、偏光片、光学胶层、覆盖窗和背板，其中，所述面板覆盖所述背板，且所述面板的一端通过所述覆晶薄膜基板与所述柔性电路板相连，所述偏光片覆盖所述面板的至少一部分，所述光学胶层覆盖所述偏光片，所述覆盖窗覆盖所述光学胶层，其中，所述背板包括：
柔性层，具有相对设置的第一面和第二面；
骨架层，设置在所述第一面，所述骨架层包括至少两个骨架条，所述骨架条间隔设置，其中，所述骨架层的材料包括聚合物；
填充层，覆盖在所述骨架层远离所述柔性层的一侧，且所述填充层嵌入相邻两所述骨架条之间的间隙处。
在本发明实施例提供的显示装置中，所述骨架条沿所述柔性层的第一方向间隔排列，并沿所述柔性层的第二方向延伸。12、根据权利要求11所述的显示装置，其中，所述骨架条沿所述第二方向间隔排列，并沿所述第一方向延伸，其中，沿所述第一方向间隔排列并沿第二方向延伸的所述骨架条与沿所述第二方向间隔排列并沿所述第一方向延伸的所述骨架条形成网格结构。
在本发明实施例提供的显示装置中，所述骨架层的弹性模量大于所述填充层的弹性模量。
在本发明实施例提供的显示装置中，所述柔性层的弹性模量小于所述骨架层的弹性模量。
在本发明实施例提供的显示装置中，所述背板包括弯折区和非弯折区，所述弯折区和非弯折区相邻设置，所述弯折区相邻的所述骨架条之间的间隙大于所述非弯折区相邻的所述骨架条之间的间隙。
在本发明实施例提供的显示装置中，所述骨架层通过丝网印刷形成在所述第一面。
在本发明实施例提供的显示装置中，所述聚合物材料包括聚酰亚胺、苯二甲酸乙二醇酯和固化胶。
在本发明实施例提供的显示装置中，所述填充层的材料包括聚酰亚胺和苯二甲酸乙二醇酯中的至少一种。
 有益效果
相较于现有技术，在本发明实施例提供的显示装置及其背板中，通过在柔性层上设置骨架层，利用骨架层作为显示装置的支撑结构，进一步的，在骨架层上设置填充层并嵌入骨架层的间隙处，因为骨架层的弹性模量大于填充层的弹性模量，当弯折区在弯曲时，由于骨架层的弹性模量较大，不利于弯折，而填充层的弹性模量较小，利于弯折，使得在弯折过程中，骨架层中的骨架条在受到填充层的挤压，产生了一个利于弯曲的方向，即本发明提供的背板能够定向弯折，从而改善在显示装置的弯折过程中，背板的内表面受压产生变形的同时也会对相邻膜层产生挤压力而产生波纹现象。
另一方面，通过设计弯折区的骨架条之间的间隙大于非弯折区的骨架条之间的间隙，即非弯折区的硬度大于弯折区的硬度，一方面进一步增加非弯折区作为支撑层时的支撑强度，另一方面利于弯折区的弯折。
 附图说明
图1为本发明实施例提供的显示装置的结构示意图；
图2为本发明实施例提供的背板的示意图；
图3为本发明实施例提供的背板中骨架层的俯视图；
图4为本发明实施例提供的背板中骨架层的另一俯视图；
图5为本发明实施例提供的背板的结构示意图；
图6为本发明实施例提供的背板的另一结构示意图。
 本发明的实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述，请参照附图中的图式，其中相同的组件符号代表相同的组件，以下的说明是基于所示的本发明具体实施例，其不应被视为限制本发明未在此详述的其他具体实施例。本说明书所使用的词语“实施例”意指实例、示例或例证。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
本发明实施例提供了一种显示装置，如图1所示，所述显示装置包括面板20、覆晶薄膜基板30、柔性电路板40、偏光片50、光学胶层60、覆盖窗70以及背板10，其中，所述面板20覆盖所述背板10,且所述面板20的一端通过所述覆晶薄膜基30板与所述柔性电路板40相连，所述偏光片50覆盖所述面板20的至少一部分，所述光学胶层60覆盖所述偏光片50，所述覆盖窗70覆盖所述光学胶层60。
如图2和图3所示，本发明实施例还提供了一种背板，所述背板10包括：柔性层100，所述柔性层100具有相对设置的第一面和第二面。其中，柔性层100的柔性材料包括聚酰亚胺（Polyimide，PI）、聚对苯二甲酸乙二醇酯（Polyethylene Terephthalate，PET）、双马来酰亚胺改性三嗪树脂材料和其他柔性材料。
骨架层110，骨架层110设置在所述第一面，所述骨架层110包括至少两个骨架条1101，所述骨架条1101间隔设置，其中，所述骨架条的宽度介于0.5微米至5微米之间。所述骨架条的材料包括聚合物材料。具体的，所述聚合物包括聚二甲基硅氧烷类聚合物、聚氨脂类聚合物、聚酰胺类聚合物、聚酯类聚合物、其他柔性材料以及固化胶，优选聚合物材料包括聚酰亚胺、聚对苯二甲酸乙二醇酯、固化胶。
填充层120，覆盖在所述骨架层110远离所述柔性层100的一侧，且所述填充层120嵌入相邻两所述骨架条110之间的间隙处。其中，填充层120的材料包括聚二甲基硅氧烷类聚合物、聚氨脂类聚合物、聚酰胺类聚合物、聚酯类聚合物以及其他柔性材料，优选聚合物材料包括聚酰亚胺、聚对苯二甲酸乙二醇酯。
进一步的，请继续参考图2和图3，所述骨架条1101沿所述柔性层100的第一方向D1间隔排列，并沿所述柔性层100的第二方向D2延伸。其中，所述柔性层100的弹性模量P1小于所述骨架层110的弹性模量P2。
具体的，所述背板10包括弯折区10b和非弯折区10a，所述弯折区10b和非弯折区10a相邻设置，所述弯折区10b相邻的所述骨架条1101之间的间隙d1大于所述非弯折区10a相邻的所述骨架条1101之间的间隙d2。此时，弯折区10b的弹性模量小于非弯折区10a的弹性模量，即，弯折区10b的硬度小于非弯折区10a的硬度，利于增加背板10作为支撑层时的支撑强度，以及有利于弯折区10的定向弯折。
进一步的，所述骨架层110的弹性模量P2大于所述填充层120的弹性模量P2。具体的，弹性模量越大，刚性越大，利于增加所述背板10作为支撑层时的支撑强度。请参考图5，在本发明实施例中，将骨架层110作为背板10的中间层，由于骨架层110的弹性模量P2大于填充层120的弹性模量P3，背板10在弯折时骨架层100不利于弯折，而由于填充层120柔性较大，当其受到挤压时，产生了一个利于弯曲的方向，即本发明实施例提供的背板10能使得背板定向弯折，从而改善在显示装置的弯折过程中，背板的内表面受压产生变形的同时也会对相邻膜层产生挤压力而产生波纹现象。
进一步的，在本发明实施例中，所述骨架条1101的形状包括方形和梯形（在剖视图中）。例如，如图6所示，当所述骨架条1101的形状为梯形时，在背板10的弯折过程中，骨架条1101受到柔性较大的填充层120的挤压，由于梯形两个侧面的具有坡度，使得骨架层1101在挤压过程中产生一个利于弯折的方向，从而实现显示装置的定向弯折。需要说明的是，在本发明实施例中，所述骨架条1101的形状并不限定于方形或梯形，还包括其他形状，例如，圆形、椭圆形等。
需要说明的是，在本发明实施例中，所述柔性层100的弹性模量P1的大小和所述填充层120的弹性模量P3大小不加限定，包括P1>P3、P1＜P3或P1=P3。
可选的，如图4所示，在本发明实施例中，所述骨架条1101沿所述第二方向D2间隔排列，并沿所述第一方向D1延伸，其中，沿所述第一方向D1间隔排列并沿第二方向D2延伸的所述骨架条1101与沿所述第二方向D2间隔排列并沿所述第一方向D1延伸的所述骨架条1101形成网格结构。其中，如图所示，所述弯折区10b的网格结构大于所述非弯折区10a的网格结构。此时，弯折区10b的弹性模量小于非弯折区10a的弹性模量，进一步增加背板10作为支撑层时的支撑强度，以及有利于弯折区10弯折。
进一步的，所述骨架层110通过丝网印刷形成在所述第一面。所述骨架层110也可以通过其他方法形成在柔性层100的第一面，例如，通过化学气相沉积或等离子体增强物理气相沉积的方法在柔性层100上形成骨架材料层，然后通过打磨、刻蚀等方法形成骨架层110。
需要说明的是，在本发明实施例中，所述第一方向D1和所述第二方向D2形成的夹角范围介于0度至180度之间，也就是说，沿所述第一方向D1间隔排列并沿第二方向D2延伸的所述骨架条1101与沿所述第二方向D2间隔排列并沿所述第一方向D1延伸的所述骨架条1101的夹角介于0度至180度之间。图中只是一种示例，本发明亦包括其他示例。例如，当沿所述第一方向D1间隔排列并沿第二方向D2延伸的所述骨架条1101与沿所述第二方向D2间隔排列并沿所述第一方向D1延伸的所述骨架条1101的夹角为60度时，所形成的网格结构呈平行四边形结构。
相较于现有技术，在本发明实施例提供的显示装置及其背板中，通过在柔性层上设置骨架层，利用骨架层作为显示装置的支撑结构，进一步的，在骨架层上设置填充层并嵌入骨架层的间隙处，因为骨架层的弹性模量大于填充层的弹性模量，当弯折区在弯曲时，由于骨架层的弹性模量较大，不利于弯折，而填充层的弹性模量较小，利于弯折，使得在弯折过程中，骨架层中的骨架条在受到填充层的挤压，产生了一个利于弯曲的方向，即本发明提供的背板能够定向弯折，从而改善在显示装置的弯折过程中，背板的内表面受压产生变形的同时也会对相邻膜层产生挤压力而产生波纹现象。
另一方面，通过设计弯折区的骨架条之间的间隙大于非弯折区的骨架条之间的间隙，即非弯折区的硬度大于弯折区的硬度，一方面进一步增加非弯折区作为支撑层时的支撑强度，另一方面利于弯折区的弯折。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (18)

  1. 一种背板，其中，包括：
    柔性层，具有相对设置的第一面和第二面；
    骨架层，设置在所述第一面，所述骨架层包括至少两个骨架条，所述骨架条间隔设置，其中，所述骨架层的材料包括聚合物；
    填充层，覆盖在所述骨架层远离所述柔性层的一侧，且所述填充层嵌入相邻两所述骨架条之间的间隙处。
  2. 根据权利要求1所述的背板，其中，所述骨架条沿所述柔性层的第一方向间隔排列，并沿所述柔性层的第二方向延伸。
  3. 根据权利要求2所述的背板，其中，所述骨架条沿所述第二方向间隔排列，并沿所述第一方向延伸，其中，沿所述第一方向间隔排列并沿第二方向延伸的所述骨架条与沿所述第二方向间隔排列并沿所述第一方向延伸的所述骨架条形成网格结构。
  4. 根据权利要求1所述的背板，其中，所述骨架层的弹性模量大于所述填充层的弹性模量。
  5. 根据权利要求1所述的背板，其中，所述柔性层的弹性模量小于所述骨架层的弹性模量。
  6. 根据权利要求1所述的背板，其中，所述背板包括弯折区和非弯折区，所述弯折区和非弯折区相邻设置，所述弯折区相邻的所述骨架条之间的间隙大于所述非弯折区相邻的所述骨架条之间的间隙。
  7. 根据权利要求6所述的一种背板，其中，所述骨架层通过丝网印刷形成在所述第一面。
  8. 根据权利要求7所述的背板，其中，所述聚合物材料包括聚酰亚胺、苯二甲酸乙二醇酯和固化胶。
  9. 根据权利要求1所述的背板，其中，所述填充层的材料包括聚酰亚胺和苯二甲酸乙二醇酯中的至少一种。
  10. 一种显示装置，其中，包括面板、覆晶薄膜基板、柔性电路板、偏光片、光学胶层、覆盖窗和背板，其中，所述面板覆盖所述背板，且所述面板的一端通过所述覆晶薄膜基板与所述柔性电路板相连，所述偏光片覆盖所述面板的至少一部分，所述光学胶层覆盖所述偏光片，所述覆盖窗覆盖所述光学胶层，其中，所述背板包括：
    柔性层，具有相对设置的第一面和第二面；
    骨架层，设置在所述第一面，所述骨架层包括至少两个骨架条，所述骨架条间隔设置，其中，所述骨架层的材料包括聚合物；
    填充层，覆盖在所述骨架层远离所述柔性层的一侧，且所述填充层嵌入相邻两所述骨架条之间的间隙处。
  11. 根据权利要求10所述的显示装置，其中，所述骨架条沿所述柔性层的第一方向间隔排列，并沿所述柔性层的第二方向延伸。
  12. 根据权利要求11所述的显示装置，其中，所述骨架条沿所述第二方向间隔排列，并沿所述第一方向延伸，其中，沿所述第一方向间隔排列并沿第二方向延伸的所述骨架条与沿所述第二方向间隔排列并沿所述第一方向延伸的所述骨架条形成网格结构。
  13. 根据权利要求10所述的显示装置，其中，所述骨架层的弹性模量大于所述填充层的弹性模量。
  14. 根据权利要求10所述的显示装置，其中，所述柔性层的弹性模量小于所述骨架层的弹性模量。
  15. 根据权利要求10所述的显示装置，其中，所述背板包括弯折区和非弯折区，所述弯折区和非弯折区相邻设置，所述弯折区相邻的所述骨架条之间的间隙大于所述非弯折区相邻的所述骨架条之间的间隙。
  16. 根据权利要求15所述的显示装置，其中，所述骨架层通过丝网印刷形成在所述第一面。
  17. 根据权利要求16所述的显示装置，其中，所述聚合物材料包括聚酰亚胺、苯二甲酸乙二醇酯和固化胶。
  18. 根据权利要求17所述的显示装置，其中，所述填充层的材料包括聚酰亚胺和苯二甲酸乙二醇酯中的至少一种。
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