WO2020155407A1 - 一种背板及其显示面板 - Google Patents

一种背板及其显示面板 Download PDF

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Publication number
WO2020155407A1
WO2020155407A1 PCT/CN2019/082960 CN2019082960W WO2020155407A1 WO 2020155407 A1 WO2020155407 A1 WO 2020155407A1 CN 2019082960 W CN2019082960 W CN 2019082960W WO 2020155407 A1 WO2020155407 A1 WO 2020155407A1
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layer
display panel
backplane
release film
back plate
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PCT/CN2019/082960
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English (en)
French (fr)
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郑长品
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武汉华星光电半导体显示技术有限公司
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Priority to US16/493,527 priority Critical patent/US11056671B2/en
Publication of WO2020155407A1 publication Critical patent/WO2020155407A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8794—Arrangements for heating and cooling
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10—Deposition of organic active material
    • H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
    • 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
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/80—Manufacture or treatment specially adapted for the organic devices covered by this subclass using temporary substrates

Definitions

  • the present invention relates to the field of light-emitting display technology, in particular, a backplane and a display panel thereof.
  • FIG. 3 illustrates the structure of a common flexible OLED display panel currently on the market. It mainly includes: glass layer (Cover Glass) 400', touch layer (TP-POL) 300', OLED device layer 200', back plate layer (BP, back plate) 100' and heat dissipation sponge copper layer (Cu-foam) ) 500'.
  • One aspect of the present invention is to provide a backplane, which adopts a new type of material hierarchical structure design, so that it realizes the original backplane functions while adding new functions, thereby reducing the corresponding functions on the display panel where it is located.
  • the functional layer effectively reduces the thickness of the display panel where it is located, thereby improving the folding performance of the display panel where it is located.
  • a backplane includes a PET (Polyethylene terephthalate) layer, wherein a graphene layer is arranged on the PET layer.
  • PET Polyethylene terephthalate
  • the graphene layer is formed on the PET layer by a deposition method.
  • a deposition method may be a low-pressure chemical vapor deposition method and an atmospheric pressure chemical vapor deposition method.
  • a pressure-sensitive adhesive layer is provided on the graphene layer.
  • a first release film layer is provided on the pressure-sensitive adhesive layer.
  • it is preferably a light release film layer, but it is not limited.
  • a second release film layer is also provided under the PET layer.
  • it is preferably a re-release film layer, but it is not limited.
  • the light and heavy release film layers are classified according to the size of the "release force" commonly used in the industry. This classification standard is a standard in the industry and will not be repeated here.
  • Another aspect of the present invention is to provide a flexible display panel, which includes the backplane involved in the present invention.
  • the flexible display panel is composed of the backplane and an OLED layer, a touch control layer and a glass layer sequentially arranged on the backplane.
  • the invention relates to a backplane and a display panel thereof.
  • the backplane is provided with a new type of graphene material layer on its PET layer, so that it has the original backplane function while also achieving an additional heat dissipation function, and the added graphene layer is for the backplane itself
  • the increased thickness is extremely limited, but it can replace the Cu-foam layer in the display panel where the backplane is located to realize the heat dissipation of the display panel where it is located, thereby effectively reducing the thickness of the display panel where it is located.
  • the elastic modulus of the display panel is reduced, and the folding performance of the display panel is correspondingly improved.
  • FIG. 1 is a schematic structural diagram of a backplane according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a flexible display panel according to another embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a flexible display panel involved in the prior art.
  • an embodiment of the present invention provides a back sheet, which includes a re-release film layer 10, a PET layer 20, a graphene layer 30, and a pressure-sensitive adhesive layer 40 arranged in order from bottom to top. And a light release film 50.
  • the present invention adds a graphene layer on the PET layer. Due to the excellent thermal conductivity and heat dissipation performance of the graphene material itself, the backplane involved in the present invention can perform its original functions. It also has a heat dissipation function. Compared with the original thickness of the backplane, the thickness of the added graphene layer is negligible with respect to its increased efficacy.
  • yet another embodiment of the present invention provides a flexible display panel, which is composed of the backplane 100 involved in the present invention, and an OLED layer 200 and a touch control layer sequentially disposed on the backplane. 300 and a glass layer 400 constitute.
  • the flexible display panel does not need to be provided with the heat-dissipating sponge copper layer disclosed in the prior art, so its overall thickness is compared with that of the flexible display panel in the prior art, and at least thinner due to the lack of the heat-dissipating sponge copper layer It is more than 190um, thereby reducing the elastic modulus of the flexible display panel involved in the present invention, and greatly improving its own product folding performance.
  • the preparation process also omits the preparation steps of the heat dissipation sponge copper layer and subsequent attachment to the back
  • the steps on the board simplify its manufacturing process.
  • the flexible display panel does not require a heat-dissipating sponge copper material, which also reduces its product cost to a certain extent, thereby enhancing its product competitiveness.
  • the invention relates to a backplane and a display panel thereof.
  • the backplane is provided with a new type of graphene material layer on its PET layer, so that it has the original backplane function while also achieving an additional heat dissipation function, and the added graphene layer is for the backplane itself
  • the increased thickness is extremely limited, but it can replace the heat dissipation sponge copper layer in the display panel where the backplane is located to realize the heat dissipation of the display panel where it is located, thereby effectively reducing the thickness of the display panel where it is located, thereby reducing it to a certain extent.
  • the elastic modulus of the display panel where it is located is reduced, and the folding performance of the display panel where it is located is correspondingly improved.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种背板及其显示面板，其中所述背板包括PET层（20），其中所述PET层（20）上设置有石墨烯层（30）。所述背板，其采用新型的石墨烯材料层级结构设计，使得其在实现原背板功能的同时又增加了新的散热功能，因而能减少其所在显示面板上相应散热功能层，从而有效缩减其所在显示面板的厚度，进而提升了所在显示面板的折叠性能。

Description

一种背板及其显示面板 技术领域
本发明涉及发光显示技术领域，尤其是，其中的一种背板及其显示面板。
 背景技术
已知，随着柔性OLED显示面板技术的不断向前发展，柔性可折叠产品已开始逐渐慢慢进入市场，并且因其可折叠性能，使得其显示面板能够调节大小，需要时展开显示，显示区域大；不需要时，折叠放置，使得其有成为市场主流的趋势。
请参阅图3所示，其图示了一种目前市场上常见的柔性OLED显示面板的结构。其主要包括：玻璃层（Cover Glass）400’、触控层（TP-POL）300’、OLED器件层200’、背板层（BP，back plate）100’以及散热海绵铜层（Cu-foam）500’。
这一现有柔性显示面板的产品结构，虽然能够实现所述面板的柔性可折叠，但由于其自身功能层较多，使得其整体厚度相对较厚，从而导致其弹性模量大，不容易弯折，使得其在实现折叠性能方面还是存在难度系数大的问题，所以减薄显示模组变成了柔性可折叠产品的重要问题。而且，这一显示面板的结构本身在制备时，也存在因其结构本身功能层模组堆叠层数多，而导致其工艺流程复杂的问题。
因此，确有必要来开发一种新型的柔性显示面板，来克服现有技术中的缺陷。
 技术问题
本发明的一个方面是提供一种背板，其采用新型的材料层级结构设计，使得其在实现原背板功能的同时又增加了新的功能，因而能减少其所在显示面板上相应功能的对应功能层，从而有效缩减其所在显示面板的厚度，进而提升了其所在显示面板的折叠性能。
 技术解决方案
本发明采用的技术方案如下：
一种背板，其包括PET(Polyethylene terephthalate)层，其中所述PET层上设置有石墨烯层。
进一步的，在不同实施方式中，其中所述石墨烯层是通过沉积法形成在所述PET层上。具体可以是低压化学气相沉积法、常压化学气相沉积法中的一种。
进一步的，在不同实施方式中，其中所述石墨烯层上设置有压敏胶层。
进一步的，在不同实施方式中，其中所述压敏胶层上设置有第一离型膜层。其中其优选轻离型膜层，但不限于。
进一步的，在不同实施方式中，其中所述PET层下也设置有第二离型膜层。其中其优选重离型膜层，但不限于。
其中所述轻、重离型膜层是根据业界常用“离型力”大小来进行分类的，这一分类标准为业界习知标准，此处不再赘述。
进一步的，本发明的又一方面是提供一种柔性显示面板，其包括本发明涉及的所述背板。
进一步的，其中所述柔性显示面板是由所述背板和依次设置在所述背板上的OLED层、触控层和玻璃层构成。
 有益效果
本发明涉及的一种背板及其显示面板。其中所述背板在其PET层上设置新型的石墨烯材料层，使得其在具有原有的背板功能的同时还额外实现了散热功能，同时添加的石墨烯层其对于背板本身而言增加的厚度极其有限，但其却可以取代所述背板所在显示面板中的散热海绵铜（Cu-foam）层实现其所在显示面板的散热，进而可以有效的降低其所在显示面板的厚度，从而在一定程度上减小了其所在显示面板的弹性模量，相应的提升了所在显示面板的折叠性能。
进一步的，其所在显示面板因不再需要设置散热海绵铜层，这也在一定程度上降低了所述显示面板的制造成本，同时也相应简化了其制备工艺。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明的一个实施方式涉及的一种背板的结构示意图；
图2为本发明又一个实施方式涉及的一种柔性显示面板的结构示意图；
图3为现有技术中涉及的一种柔性显示面板的结构示意图。
图1-3中的附图标记说明如下：
重离型膜层       10           PET层           20
石墨烯层         30           压敏胶层         40
轻离型膜层       50           背板             100、100’
OLED器件层     200、200’触控层           300、300’
玻璃层           400、400’散热海绵铜层     500’
 本发明的实施方式
以下将结合附图和实施例，对本发明涉及的一种背板及其显示面板的技术方案作进一步的详细描述。
请参阅图1所示，本发明的一个实施方式提供了一种背板，其包括从下到上依次设置的重离型膜层10、PET层20、石墨烯层30、压敏胶层40以及轻离型膜层50。
其中本发明在所述PET层上增设石墨烯层，由于所述石墨烯材质本身具有的优异的热传导性能及散热性能，使得本发明涉及的所述背板在能够实施其原有的功能外，又具有了散热功能。而增设的石墨烯层的厚度，相对于所述背板原有的厚度而言，其增加的厚度相对于其增加的功效而言可忽略不计，因此，在后续的柔性显示面板的制备过程中，其可使得其所在的柔性显示面板不必在设置现有的散热海绵铜层进行所述显示面板自身的散热，如此降低了所述显示面板的厚度，相应的也就减少了所述柔性显示面板的弹性模量，进而极大的提升了所述柔性显示面板的折叠性能。
请参阅图2所示，本发明的又一个实施方式提供了一种柔性显示面板，其是由本发明涉及的所述背板100和依次设置在所述背板上的OLED层200、触控层300和玻璃层400构成。
其中，所述柔性显示面板不再需要设置现有技术中揭示的所述散热海绵铜层，因而其整体厚度相对于现有技术中的柔性显示面板，因缺少所述散热海绵铜层至少减薄了190um以上，从而减小了本发明涉及的所述柔性显示面板的弹性模量，极大的提升了其自身的产品折叠性能。
相应的，由于本发明涉及的所述柔性显示面板不再需要设置散热用的所述散热海绵铜层，其制备工艺也就省略了散热海绵铜层的制备步骤以及后续的贴附于所述背板上的步骤，从而简化了其制程。同时，所述柔性显示面板也就不需要散热海绵铜材料，这也在一定程度上降低了其产品成本，进而提升其产品竞争力。
本发明涉及的一种背板及其显示面板。其中所述背板在其PET层上设置新型的石墨烯材料层，使得其在具有原有的背板功能的同时还额外实现了散热功能，同时添加的石墨烯层其对于背板本身而言增加的厚度极其有限，但其却可以取代所述背板所在显示面板中的散热海绵铜层实现其所在显示面板的散热，进而可以有效的降低其所在显示面板的厚度，从而在一定程度上减小了其所在显示面板的弹性模量，相应的提升了所在显示面板的折叠性能。
本发明的技术范围不仅仅局限于上述说明中的内容，本领域技术人员可以在不脱离本发明技术思想的前提下，对上述实施例进行多种变形和修改，而这些变形和修改均应当属于本发明的范围内。

Claims (10)

  1. 一种背板，其包括PET层；其中所述PET层上设置有石墨烯层。
  2. 根据权利要求1所述的背板；其中所述石墨烯层是通过沉积法形成在所述PET层上。
  3. 根据权利要求2所述的背板；其中所述石墨烯层是通过低压化学气相沉积法或是常压化学气相沉积法形成在所述PET层上。
  4. 根据权利要求1所述的背板；其中所述石墨烯层上设置有压敏胶层。
  5. 根据权利要求4所述的背板；其中所述压敏胶层上设置有第一离型膜层。
  6. 根据权利要求5所述的背板；其中所述第一离型膜层为轻离型膜层。
  7. 根据权利要求1所述的背板；其中所述PET层下设置有第二离型膜层。
  8. 根据权利要求7所述的背板；其中所述第二离型膜层为重离型膜层。
  9. 一种柔性显示面板；其包括根据权利要求1所述的背板。
  10. 根据权利要求9所述的柔性显示面板，其是由所述背板和依次设置在所述背板上的OLED层、触控层和玻璃层构成。
PCT/CN2019/082960 2019-01-30 2019-04-17 一种背板及其显示面板 WO2020155407A1 (zh)

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CN111129030A (zh) * 2019-12-17 2020-05-08 武汉华星光电半导体显示技术有限公司 背板及显示面板
CN111725280A (zh) * 2020-06-11 2020-09-29 武汉华星光电半导体显示技术有限公司 一种柔性oled显示装置及其模组迭层结构的制备方法
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