WO2020006920A1 - Oled封装结构、oled显示面板及其制作方法 - Google Patents

Oled封装结构、oled显示面板及其制作方法 Download PDF

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Publication number
WO2020006920A1
WO2020006920A1 PCT/CN2018/109713 CN2018109713W WO2020006920A1 WO 2020006920 A1 WO2020006920 A1 WO 2020006920A1 CN 2018109713 W CN2018109713 W CN 2018109713W WO 2020006920 A1 WO2020006920 A1 WO 2020006920A1
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Prior art keywords
layer
sub
oled
polarizing
display panel
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French (fr)
Inventor
杨奇
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US16/339,010 priority Critical patent/US10930878B2/en
Publication of WO2020006920A1 publication Critical patent/WO2020006920A1/zh
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80Constructional details
    • H10K59/8791Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/80Constructional details
    • H10K50/84Passivation; Containers; Encapsulations
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/80Constructional details
    • H10K50/868Arrangements for polarized light emission
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80Constructional details
    • H10K59/87Passivation; Containers; Encapsulations
    • H10K59/873Encapsulations
    • H10K59/8731Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00Manufacture or treatment specially adapted for the organic devices covered by this subclass

Definitions

  • the present application relates to the field of display, and in particular to an OLED packaging structure, an OLED display panel, and a manufacturing method thereof.
  • the self-luminescence of the OLED display panel during display is susceptible to interference by ambient light.
  • the OLED display panel will be circularly polarized on the module section. Combines a linear polarizer and a 1/4 wavelength phase film to reduce the emission of ambient light, thereby improving the display contrast of the OLED display panel.
  • the OLED display panel includes a substrate 11, an array substrate 12, an OLED light-emitting layer 13, a packaging film 14, a touch panel 15, a circular polarizer 16, an optical adhesive 17, and a cover plate 18 in order; among them, the circular polarizer 16 It is located between the touch panel 15 and the optical glue 17.
  • FIG. 2 is a detailed structure of a circular polarizer.
  • the OLED display panel includes a release film 121, a phase retarder 162, an adhesive 163, a protective film 164, a polarizing substrate 165, a protective film 164, and a surface protective film 166, which are arranged in this order. After dyeing with dichroic organic dye, it is stretched to form a polarizing function.
  • Protective film 164 is attached to the upper and lower sides of polarizing substrate 165.
  • Protective film 164 is made of triacetate cellulose (TAC) with high strength, good light transmittance, and heat and humidity resistance ) Material preparation.
  • TAC triacetate cellulose
  • the circular polarization function is realized by the phase retarder 162. Linearly polarized light is converted into circularly polarized light by a 1/4 wavelength phase delay.
  • the conventional polarizer 16 is not only time-consuming to attach, but it is also difficult to reduce the thickness. Therefore, how to realize the ultra-thinning of the polarizer or even cancel the polarizer is a huge challenge.
  • the polarizers in the existing OLED display panels are not only time-consuming to attach, but also difficult to achieve thinning.
  • an OLED packaging structure including a packaging unit and a polarizing layer disposed in the packaging unit;
  • the packaging unit includes a first packaging layer, a second packaging layer, and a protective layer;
  • the polarizing layer includes a first sub-polarizing layer and a second sub-polarizing layer;
  • the first sub-polarization layer is disposed between the OLED substrate and the first encapsulation layer
  • the second sub-polarization layer is disposed between the first encapsulation layer and the second encapsulation layer.
  • the first sub-polarizing layer and the second sub-polarizing layer each include a photosensitive organic layer and a dye molecular layer which are arranged in a stack;
  • the first sub-polarizing layer is relatively parallel to the second sub-polarizing layer.
  • the photosensitive organic layer is made of a photo-alignable organic material.
  • the dye molecular layer is prepared using a dichroic dye molecular material.
  • the first sub-polarization layer is a 1/4 wavelength phase retardation layer
  • the second sub-polarization layer is a linear polarization layer
  • intersection angle between the transmission axis of the linear polarizing layer and the projection pattern of the fast axis of the 1/4 wavelength phase retardation layer on the same projection plane is 45 °.
  • a method for manufacturing an OLED display panel including:
  • Step S10 Provide an OLED substrate, and form a first sub-polarizing layer on the OLED substrate;
  • Step S20 forming a first encapsulation layer over the first sub-polarizing layer
  • Step S30 forming a second sub-polarizing layer over the first encapsulation layer
  • Step S40 forming a second encapsulation layer over the second sub-polarizing layer
  • Step S50 forming a protective layer over the second packaging layer
  • the first sub-polarizing layer and the second sub-polarizing layer each include a photosensitive organic layer and a dye molecular layer which are arranged in a stack.
  • the first encapsulation layer and the second encapsulation layer are inorganic layers, and the protective layer is an organic layer.
  • the step S10 specifically includes: providing an OLED substrate, forming the photosensitive organic layer on the OLED substrate, forming the dye molecular layer on a surface of the photosensitive organic layer, and sensitive to the photosensitive The organic layer and the dye molecule layer are subjected to a photo-alignment process to form the first sub-polarizing layer.
  • the organic layer, the photosensitive organic layer, and the dye molecule layer are all prepared by a thin film technology.
  • the first sub-polarizing layer and the second sub-polarizing layer are relatively parallel.
  • the photosensitive organic layer is made of a photo-alignable organic material.
  • the dye molecular layer is prepared using a dichroic dye molecular material.
  • the first sub-polarization layer is a 1/4 wavelength phase retardation layer
  • the second sub-polarization layer is a linear polarization layer
  • intersection angle between the transmission axis of the linear polarizing layer and the projection pattern of the fast axis of the 1/4 wavelength phase retardation layer on the same projection plane is 45 °.
  • the OLED display panel further includes at least one composite layer, and the composite layer includes an organic layer and an inorganic layer that are arranged in a stack;
  • the composite layer is disposed between the OLED substrate and the protective layer.
  • an OLED display panel including an OLED substrate, a packaging unit disposed on the OLED substrate, and a polarizing layer disposed in the packaging unit;
  • the packaging unit includes a first packaging layer, a second packaging layer, and a protective layer;
  • the polarizing layer includes a first sub-polarizing layer and a second sub-polarizing layer;
  • the first sub-polarization layer is disposed between the OLED substrate and the first encapsulation layer
  • the second sub-polarization layer is disposed between the first encapsulation layer and the second encapsulation layer.
  • the first sub-polarizing layer is relatively parallel to the second sub-polarizing layer
  • the first sub-polarizing layer and the second sub-polarizing layer each include a photosensitive organic layer and a dye molecular layer which are arranged in a stack. .
  • the photosensitive organic layer is made of a photo-alignable organic material.
  • the dye molecular layer is prepared using a dichroic dye molecular material.
  • the first sub-polarization layer is a 1/4 wavelength phase retardation layer
  • the second sub-polarization layer is a linear polarization layer
  • intersection angle between the transmission axis of the linear polarizing layer and the projection pattern of the fast axis of the 1/4 wavelength phase retardation layer on the same projection plane is 45 °.
  • the OLED display panel further includes at least one composite layer, and the composite layer includes an organic layer and an inorganic layer that are arranged in a stack;
  • the composite layer is disposed between the OLED substrate and the protective layer.
  • the advantage of this application is that by designing an OLED packaging structure with polarizing characteristics, the polarizing layer is compatible with the packaging unit, and the manufacturing and attaching of the polarizing layer can be simplified on the premise of eliminating the process of attaching a circular polarizer. And achieve ultra-thinning of the polarizing layer.
  • FIG. 1 is a schematic structural diagram of an OLED display panel in the prior art
  • FIG. 2 is a schematic structural diagram of a circular polarizer in the prior art
  • FIG. 3 is a schematic structural diagram of an OLED packaging structure according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a first sub-polarizer in an OLED package structure according to an embodiment of the present application
  • FIG. 5 is a schematic structural diagram of a second sub-polarizer in an OLED packaging structure according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a polarization principle of an OLED packaging structure according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a manufacturing method of an OLED display panel according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an OLED display panel according to an embodiment of the present application.
  • the application provides an OLED packaging structure, an OLED display panel and a manufacturing method thereof.
  • the polarizing film in the existing OLED display panel is not only time-consuming to attach, but also difficult to achieve thinning. This embodiment can improve this defect.
  • FIG. 3 is a schematic structural diagram of an OLED packaging structure according to an embodiment of the present application.
  • the present application provides an OLED packaging structure 21 including a packaging unit 212 and a polarizing layer 211 disposed in the packaging unit.
  • the packaging unit includes a first packaging layer 2121, a second packaging layer 2122, and a protective layer 2123.
  • the first packaging layer 2121 and the second packaging layer 2122 are inorganic layers
  • the protective layer is an organic layer. .
  • the inorganic layer has better barrier properties against water and oxygen. Therefore, it is used to block external water and oxygen in the OLED packaging structure.
  • the polarizing layer 211 includes a first sub-polarizing layer 2111 and a second sub-polarizing layer 2112.
  • the first sub-polarizing layer 2111 is disposed between the OLED substrate and the first encapsulating layer 2121
  • the second sub-polarizing layer 2112 is disposed between the first encapsulating layer 2121 and the Between the second encapsulation layers 2122.
  • the OLED packaging structure 21 is disposed above the OLED substrate.
  • FIG. 4 is a schematic structural diagram of a first sub-polarizer in an OLED package structure according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a second sub-polarizer in an OLED package structure according to an embodiment of the present application.
  • the first sub-polarizing layer 2111 includes a photosensitive organic layer 2111a and a dye molecular layer 2111b which are arranged in a stack.
  • Each of the second sub-polarizing layers 2112 includes a photosensitive organic layer 2112a and a dye molecular layer 2112b.
  • the structures of the first sub-polarizing layer 2111 and the second sub-polarizing layer 2112 are the same, but the functions in the package structure are different.
  • the photosensitive organic layer is made of a photo-alignable organic material.
  • the dye molecular layer is made of a dichroic dye molecular material.
  • the first sub-polarizing layer 2111 is relatively parallel to the second sub-polarizing layer 2112.
  • a photosensitive organic layer and a dye molecular layer are used to replace the original circular polarizer, and a photo-alignment process is used to replace the conventional polarizing substrate stretching process.
  • the dye molecular layer after the dye molecular layer is absorbed by the photosensitive organic layer, it is arranged in a certain direction in the downward direction of the light distribution to form a conductive long chain, and the electrons having conductivity in the dye molecule can move along the long chain.
  • the electric vector vibration of the light wave along the long chain direction is strongly absorbed, and the electric vector vibration perpendicular to the long chain direction is not absorbed and can pass through, so that the transmitted light forms polarized light.
  • the first sub-polarization layer 2111 is a 1/4 wavelength phase retardation layer
  • the second sub-polarization layer 2112 is a linear polarization layer
  • the intersection angle between the projection axis of the linear polarization layer and the fast axis of the 1/4 wavelength phase retardation layer on the same projection plane is 45 °.
  • the transmission axis of the linear polarizing layer is the 0 ° direction
  • the fast axis of the 1/4 wavelength phase retardation layer is the 45 ° direction.
  • the OLED packaging structure further includes at least one composite layer, and the composite layer includes an organic layer and an inorganic layer that are disposed in a stack.
  • the composite layer is disposed between the OLED substrate and the protective layer.
  • FIG. 7 is a schematic flowchart of a manufacturing method of an OLED display panel according to an embodiment of the present application.
  • a method for manufacturing an OLED display panel includes:
  • Step S10 Provide an OLED substrate, and form a first sub-polarizing layer on the OLED substrate.
  • Step S20 forming a first encapsulation layer over the first sub-polarizing layer.
  • Step S30 A second sub-polarizing layer is formed over the first encapsulation layer.
  • Step S40 A second encapsulation layer is formed over the second sub-polarizing layer.
  • Step S50 A protective layer is formed over the second packaging layer.
  • the first sub-polarizing layer and the second sub-polarizing layer each include a photosensitive organic layer and a dye molecular layer that are arranged in a stack.
  • the first encapsulation layer and the second encapsulation layer are inorganic layers, and the protective layer is an organic layer.
  • the step S10 includes: providing an OLED substrate, and forming the photosensitive organic layer on the OLED substrate.
  • the dye molecular layer is formed on a surface of the photosensitive organic layer, and a photo-alignment process is performed on the photosensitive organic layer and the dye molecular layer to form the first sub-polarizing layer.
  • the organic layer, the photosensitive organic layer, and the dye molecule layer are all prepared by a thin film technology.
  • the OLED flexible display panel includes an OLELD packaging structure.
  • the first encapsulation layer, the second encapsulation layer and the organic layer in the OLED packaging structure are prepared by using a thin film technology.
  • the organic layer is prepared by inkjet printing or screen printing technology.
  • the first encapsulation layer and the second encapsulation layer may be prepared by at least one of a pulsed laser deposition technique or an atomic layer deposition technique.
  • the photosensitive organic layer and the dye molecular layer are both organics. Therefore, it can be prepared by using the organic thin film technology, and has good compatibility with the thin film manufacturing process of the OLED packaging structure. Because the OLED display panel in this application does not have a process of attaching a circular polarizer. Therefore, the manufacturing process of the OLED display panel can be reduced, thereby improving the production efficiency of the OLED display panel. In addition, the thin film preparation technology can greatly reduce the thickness of the polarizing layer and greatly expand the application space of the OLED display panel.
  • step S30 are similar to the specific steps of step S10.
  • step S10 For specific principles, please refer to the description of step S10, and details are not described herein.
  • FIG. 8 is a schematic structural diagram of an OLED display panel according to an embodiment of the present application.
  • an OLED display panel 2 which includes an OLED substrate 22, a packaging unit disposed on the OLED substrate 22, and a polarizing layer disposed in the packaging unit.
  • the packaging unit includes a first packaging layer 2121, a second packaging layer 2122, and a protective layer 2123.
  • the polarizing layer includes: a first sub-polarizing layer 2111 and a second sub-polarizing layer 2112.
  • the first sub-polarization layer 2111 is disposed between the OLED substrate 22 and the first encapsulation layer 2121, and the second sub-polarization layer 2112 is disposed on the first encapsulation layer 2121.
  • the packaging structure in the OLED display panel is the same as the structure of the OLED packaging structure.
  • the working principle of the packaging structure in the OLED display panel please refer to the working principle of the OLED packaging structure, which is not repeated here.
  • the application makes the polarizing layer compatible with the packaging unit. Under the premise that the process of attaching a circular polarizer is omitted, the manufacturing and attaching of the polarizing layer can be simplified and the polarizing layer can be realized Thin.

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  • Inorganic Chemistry (AREA)
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Abstract

提供一种OLED封装结构、OLED显示面板及其制作方法。OLED封装结构(21)包括封装单元(212)以及偏光层(211)。封装单元包括第一封装层(2121)、第二封装层(2122)和保护层(2123)。偏光层包括第一子偏光层(2111)和第二子偏光层(2112)。其中,第一子偏光层设置于OLED基板与第一封装层之间,第二子偏光层设置于第一封装层与第二封装层之间。

Description

OLED封装结构、OLED显示面板及其制作方法 技术领域
本申请涉及显示领域,具体涉及一种OLED封装结构、OLED显示面板及其制作方法。
背景技术
OLED显示面板在显示时的自发光易受环境光的干扰,为了有效抵抗环境光对OLED显示面板的自发光的干扰。OLED显示面板会在模组段偏贴圆偏光片。结合线偏光片及1/4波长相位膜来减少环境光的射出,进而提高OLED显示面板的显示对比度。
请参阅图1,OLED显示面板依次包括基底11、阵列基板12、OLED发光层13、封装薄膜14、触控面板15、圆偏光片16、光学胶17以及盖板18;其中,圆偏光片16位于触控面板15和光学胶17之间。
请参阅图2,图2为圆偏光片的具体结构。OLED显示面板依次包括层叠设置的离型膜121、相位延迟片162、黏着剂163、保护膜164、偏光基体165、保护膜164以及表面保护膜166。经过二向色性有机染料进行染色后拉伸以形成偏振功能,偏光基体165上下两侧贴有保护膜164,保护膜164采用强度高、透光率好且耐湿热的三醋酸纤维素(TAC)材料制备。而圆偏光功能由相位延迟片162实现。通过1/4波长相位延迟使线偏光转化为圆偏光。
现有的偏光片16不仅贴附费时,而且难以实现轻薄化。因此,如何实现偏光片的超薄化甚至取消偏光片是一个巨大的挑战。
技术问题
现有OLED显示面板中偏光片不仅贴附费时,且难以实现薄化的问题。
技术解决方案
为实现上述目的,本发明提供的技术方案如下:
根据本申请的一个方面,提供了一种OLED封装结构,包括封装单元以及设置在所述封装单元内的偏光层;
所述封装单元包括第一封装层、第二封装层和保护层;
所述偏光层包括第一子偏光层和第二子偏光层;
其中,所述第一子偏光层设置于OLED基板与所述第一封装层之间,所述第二子偏光层设置于所述第一封装层与所述第二封装层之间。
根据本申请一实施例,所述第一子偏光层和所述第二子偏光层均包括层叠设置的光敏有机层和染料分子层;
所述第一子偏光层与所述第二子偏光层相对平行。
根据本申请一实施例,所述光敏有机层采用光配向性有机材料制备。
根据本申请一实施例,所述染料分子层采用二向色性染料分子材料制备。
根据本申请一实施例,所述第一子偏光层为1/4波长相位延迟层,所述第二子偏光层为线偏光层;
其中,所述线偏光层的透光轴与所述1/4波长相位延迟层的快轴在同一投影面上的投影图案的相交夹角为45°。
根据本发明的另一个方面,提供了一种OLED显示面板的制作方法,包括:
步骤S10、提供一OLED基板,在所述OLED基板上方形成第一子偏光层;
步骤S20、在所述第一子偏光层上方形成第一封装层;
步骤S30、在所述第一封装层上方形成第二子偏光层;
步骤S40、在所述第二子偏光层上方形成第二封装层;
步骤S50、在所述第二封装层上方形成保护层;
其中,所述第一子偏光层和所述第二子偏光层均包括层叠设置的光敏有机层和染料分子层。
根据本申请一实施例,所述第一封装层和所述第二封装层为无机层,所述保护层为有机层。
根据本申请一实施例,所述步骤S10具体包括:提供一OLED基板,在所述OLED基板形成所述光敏有机层,在所述光敏有机层的表面形成所述染料分子层,对所述光敏有机层和所述染料分子层进行光配向工艺以形成所述第一子偏光层。
根据本申请一实施例,所述有机层、所述光敏有机层和所述染料分子层均采用薄膜技术制备。
根据本申请一实施例,所述第一子偏光层与所述第二子偏光层相对平行。
根据本申请一实施例,所述光敏有机层采用光配向性有机材料制备。
根据本申请一实施例,所述染料分子层采用二向色性染料分子材料制备。
根据本申请一实施例,所述第一子偏光层为1/4波长相位延迟层,所述第二子偏光层为线偏光层;
其中,所述线偏光层的透光轴与所述1/4波长相位延迟层的快轴在同一投影面上的投影图案的相交夹角为45°。
根据本申请一实施例,所述OLED显示面板还包括至少一复合层,所述复合层包括层叠设置的有机层和无机层;
所述复合层设置在所述OLED基板和所述保护层之间。
根据本发明的再一个方面,提供了一种OLED显示面板,包括OLED基板、设置在所述OLED基板上的封装单元以及设置在所述封装单元内的偏光层;
所述封装单元包括第一封装层、第二封装层和保护层;
所述偏光层包括第一子偏光层和第二子偏光层;
其中,所述第一子偏光层设置于OLED基板与所述第一封装层之间,所述第二子偏光层设置于所述第一封装层与所述第二封装层之间。
根据本申请一实施例,所述第一子偏光层与所述第二子偏光层相对平行;
其中,所述第一子偏光层和所述第二子偏光层均包括层叠设置的光敏有机层和染料分子层。。
根据本申请一实施例,所述光敏有机层采用光配向性有机材料制备。
根据本申请一实施例,所述染料分子层采用二向色性染料分子材料制备。
根据本申请一实施例,所述第一子偏光层为1/4波长相位延迟层,所述第二子偏光层为线偏光层;
其中,所述线偏光层的透光轴与所述1/4波长相位延迟层的快轴在同一投影面上的投影图案的相交夹角为45°。
根据本申请一实施例,所述OLED显示面板还包括至少一复合层,所述复合层包括层叠设置的有机层和无机层;
所述复合层设置在所述OLED基板和所述保护层之间。
有益效果
本申请的优点是,申请通过设计一种具有偏光特性的OLED封装结构,使偏光层与封装单元相容,在省去贴附圆偏光片工艺的前提下,能够简化偏光层的制作和贴附,并实现偏光层的超薄化。
附图说明
为了更清楚地说明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单介绍,显而易见地,下面描述中的附图仅仅是发明的一些实施例,对于本领域普通技术人员来讲,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为现有技术中的OLED显示面板的结构示意图;
图2为现有技术中圆偏光片的结构示意图;
图3为本申请一实施例中OLED封装结构的结构示意图;
图4为本申请一实施例中OLED封装结构中第一子偏光片的结构示意图;
图5为本申请一实施例中OLED封装结构中第二子偏光片的结构示意图;
图6为本申请一实施例中OLED封装结构的偏光原理示意图;
图7为本申请一实施例中OLED显示面板的制作方法的流程示意图;
图8为本申请一实施例中OLED显示面板的结构示意图。
本发明的实施方式
以下各实施例的说明是参考附加的图示,用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语,例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等,仅是参考附加图式的方向。因此,使用的方向用语是用以说明及理解本发明,而非用以限制本发明。在图中,结构相似的单元是用以相同标号表示。
本申请提供了一种OLED封装结构、OLED显示面板及其制作方法。现有OLED显示面板中偏光片不仅贴附费时,且难以实现薄化的问题,本实施例能够改善该缺陷。
下面接合附图和具体实施例对本申请做进一步的说明:
请参阅图3,图3为本申请一实施例中OLED封装结构的结构示意图。
本申请提供了一种OLED封装结构21,包括封装单元212以及设置在所述封装单元内的偏光层211。
所述封装单元包括第一封装层2121、第二封装层2122和保护层2123,通常的,所述第一封装层2121和所述第二封装层2122为无机层,所述保护层为有机层。
在一种实施例中,无机层对水氧具有较好的阻隔性能。因此在OLED封装结构中用于阻隔外界水氧。
所述偏光层211包括第一子偏光层2111和第二子偏光层2112。
在一种实施例中,所述第一子偏光层2111设置于OLED基板与所述第一封装层2121之间,所述第二子偏光层2112设置于所述第一封装层2121与所述第二封装层2122之间。
在一种实施例中,所述OLED封装结构21设置于OLED基板的上方。
请参阅图4,图4为本申请一实施例中OLED封装结构中第一子偏光片的结构示意图。
请参阅图5,图5为本申请一实施例中OLED封装结构中第二子偏光片的结构示意图。
在一种实施例中,所述第一子偏光层2111包括层叠设置的光敏有机层2111a和染料分子层2111b。所述第二子偏光层2112均包括层叠设置的光敏有机层2112a和染料分子层2112b。
即所述第一子偏光层2111和所述第二子偏光层2112的结构相同,但是在封装结构中的功能不同。
在制备光敏有机层2112a和染料分子层2112b时需要对光敏有机材料和染料分子材料进行光配向工艺以分别形成光敏有机层2112a和染料分子层2112b。
在一种实施例中,所述光敏有机层采用光配向性有机材料制备。
在一种实施例中,所述染料分子层采用二向色性染料分子材料制备。
所述第一子偏光层2111与所述第二子偏光层2112相对平行。
本申请以光敏有机层和染料分子层代替原有的圆偏光片,以光配向过程代替传统的偏光基体拉伸过程。
在一种实施例中,染料分子层被光敏有机层吸着后,在光配向下沿着一定方向排列,形成一条条的导电长链,染料分子中具有导电能力的电子能够沿着长链移动。在遇到光照射时,光波沿着长链方向的电矢量振动被强烈吸收,而垂直于长链方向的电矢量振动不被吸收从而可以通过,如此透射光就形成了偏振光。
在一种实施例中,所述第一子偏光层2111为1/4波长相位延迟层,所述第二子偏光层2112为线偏光层。
在一种实施例中,所述线偏光层的透光轴与所述1/4波长相位延迟层的快轴在同一投影面上的投影图案的相交夹角为45°。
OLED封装结构的偏光原理示意图请参阅图6。
假设线偏光层的透过轴为0°方向,1/4波长相位延迟层的快轴为45°方向。当外界光到达OLED封装结构后。先经过线偏光层与相位延迟层之后转化为左旋圆偏光。经过OLED基板的高反射界面反射后形成右旋圆偏光,再一次经过相位延迟层后则转化为90°光。导致与线偏光层透过方向垂直而无法射出,从而达到减少环境光干扰,提升对比度的效果。
在一种实施例中,所述OLED封装结构还包括至少一复合层,所述复合层包括层叠设置的有机层和无机层。
在一种实施例中,所述复合层设置在所述OLED基板和所述保护层之间,通过增加复合层的方式可以提升OLED封装结构的水氧阻隔效果。
请参阅图7,图7为本申请一实施例中OLED显示面板的制作方法的流程示意图。
根据本申请的又一个方面,还提供了一种OLED显示面板的制作方法。包括:
步骤S10、提供一OLED基板,在所述OLED基板上方形成第一子偏光层。
步骤S20、在所述第一子偏光层上方形成第一封装层。
步骤S30、在所述第一封装层上方形成第二子偏光层。
步骤S40、在所述第二子偏光层上方形成第二封装层。
步骤S50、在所述第二封装层上方形成保护层。
在一种实施例中,所述第一子偏光层和所述第二子偏光层均包括层叠设置的光敏有机层和染料分子层。
在一种实施例中,所述第一封装层和所述第二封装层为无机层,所述保护层为有机层。
所述步骤S10包括:提供一OLED基板,在所述OLED基板形成所述光敏有机层。在所述光敏有机层的表面形成所述染料分子层,对所述光敏有机层和所述染料分子层进行光配向工艺以形成所述第一子偏光层。
所述有机层、所述光敏有机层和所述染料分子层均采用薄膜技术制备。
在一种实施例中,OLED柔性显示面板包括OLELD封装结构。所述OLED封装结构中的第一封装层、第二封装层和有机层采用薄膜技术制备。所述有机层采用喷墨打印或者丝网印刷技术进行制备。而第一封装层、第二封装层可通过脉冲激光沉积技术或原子层沉积技术中的至少一者制备。
由于光敏有机层和染料分子层均为有机物。因此可利用有机薄膜技术进行制备,与OLED封装结构的薄膜制程有很好的相容性。由于本申请中OLED显示面板没有圆偏光片的贴附制程。故能够减少OLED显示面板的工艺制程从而提升OLED显示面板的生产效率。且薄膜制备技术可以大大降低偏光层的厚度,极大的拓宽OLED显示面板的应用空间。
在一种实施例中,所述步骤S30的具体步骤与步骤S10的具体步骤相似,具体原理请参考步骤S10的描述,这里不做赘述。
请参阅图8,图8为本申请一实施例中OLED显示面板的结构示意图。
根据本申请的再一个方面,还提供了一种OLED显示面板2,包括OLED基板22、设置在所述OLED基板22上的封装单元以及设置在所述封装单元内的偏光层。
所述封装单元包括第一封装层2121、第二封装层2122和保护层2123。
所述偏光层包括:第一子偏光层2111和第二子偏光层2112。
其中,所述第一子偏光层2111设置于OLED基板22与所述第一封装层2121之间,所述第二子偏光层2112设置于所述第一封装层2121
所述OLED显示面板中的封装结构与所述OLED封装结构的结构相同,所述OLED显示面板中的封装结构的工作原理请参考所述OLED封装结构的工作原理,这里不再赘述。
本申请通过设计一种具有偏光特性的OLED封装结构,使偏光层与封装单元相容,在省去贴附圆偏光片工艺的前提下,能够简化偏光层的制作和贴附,并实现偏光层的超薄化。
综上所述,虽然本申请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申请,本领域的普通技术人员,在不脱离本申请的精神和范围内,均可作各种更动与润饰,因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种OLED封装结构,其包括封装单元以及设置在所述封装单元内的偏光层;
    所述封装单元包括第一封装层、第二封装层和保护层;
    所述偏光层包括第一子偏光层和第二子偏光层;
    其中,所述第一子偏光层设置于OLED基板与所述第一封装层之间,所述第二子偏光层设置于所述第一封装层与所述第二封装层之间。
  2. 根据权利要求1所述的OLED封装结构,其中,所述第一子偏光层和所述第二子偏光层均包括层叠设置的光敏有机层和染料分子层;
    所述第一子偏光层与所述第二子偏光层相对平行。
  3. 根据权利要求2所述的OLED封装结构,其中,所述光敏有机层采用光配向性有机材料制备。
  4. 根据权利要求2所述的OLED封装结构,其中,所述染料分子层采用二向色性染料分子材料制备。
  5. 根据权利要求2所述的OLED封装结构,其中,所述第一子偏光层为1/4波长相位延迟层,所述第二子偏光层为线偏光层;
    其中,所述线偏光层的透光轴与所述1/4波长相位延迟层的快轴在同一投影面上的投影图案的相交夹角为45°。
  6. 一种OLED显示面板的制作方法,其包括:
    步骤S10、提供一OLED基板,在所述OLED基板上方形成第一子偏光层;
    步骤S20、在所述第一子偏光层上方形成第一封装层;
    步骤S30、在所述第一封装层上方形成第二子偏光层;
    步骤S40、在所述第二子偏光层上方形成第二封装层;
    步骤S50、在所述第二封装层上方形成保护层;
    其中,所述第一子偏光层和所述第二子偏光层均包括层叠设置的光敏有机层和染料分子层。
  7. 根据权利要求6所述的OLED显示面板的制作方法,其中,所述第一封装层和所述第二封装层为无机层,所述保护层为有机层。
  8. 根据权利要求7所述的OLED显示面板的制作方法,其中,所述步骤S10具体包括:提供一OLED基板,在所述OLED基板形成所述光敏有机层,在所述光敏有机层的表面形成所述染料分子层,对所述光敏有机层和所述染料分子层进行光配向工艺以形成所述第一子偏光层。
  9. 根据权利要求8所述的OLED显示面板的制作方法,其中,所述有机层、所述光敏有机层和所述染料分子层均采用薄膜技术制备。
  10. 根据权利要求6所述的OLED显示面板的制作方法,其中,所述第一子偏光层与所述第二子偏光层相对平行。
  11. 根据权利要求6所述的OLED显示面板的制作方法,其中,所述光敏有机层采用光配向性有机材料制备。
  12. 根据权利要求6所述的OLED显示面板的制作方法,其中,所述染料分子层采用二向色性染料分子材料制备。
  13. 根据权利要求6所述的OLED显示面板的制作方法,其中,所述第一子偏光层为1/4波长相位延迟层,所述第二子偏光层为线偏光层;
    所述线偏光层的透光轴与所述1/4波长相位延迟层的快轴在同一投影面上的投影图案的相交夹角为45°。
  14. 根据权利要求6所述的OLED显示面板的制作方法,其中,所述OLED显示面板还包括至少一复合层,所述复合层包括层叠设置的有机层和无机层;
    所述复合层设置在所述OLED基板和所述保护层之间。
  15. 一种OLED显示面板,其包括OLED基板、设置在所述OLED基板上的封装单元以及设置在所述封装单元内的偏光层;
    所述封装单元包括第一封装层、第二封装层和保护层;
    所述偏光层包括第一子偏光层和第二子偏光层;
    其中,所述第一子偏光层设置于OLED基板与所述第一封装层之间,所述第二子偏光层设置于所述第一封装层与所述第二封装层之间。
  16. 根据权利要求15所述的OLED显示面板,其中,所述第一子偏光层与所述第二子偏光层相对平行;
    其中,所述第一子偏光层和所述第二子偏光层均包括层叠设置的光敏有机层和染料分子层。
  17. 根据权利要求16所述的OLED显示面板,其中,所述光敏有机层采用光配向性有机材料制备。
  18. 根据权利要求16所述的OLED显示面板,其中,所述染料分子层采用二向色性染料分子材料制备。
  19. 根据权利要求15所述的OLED显示面板,其中,所述第一子偏光层为1/4波长相位延迟层,所述第二子偏光层为线偏光层;
    其中,所述线偏光层的透光轴与所述1/4波长相位延迟层的快轴在同一投影面上的投影图案的相交夹角为45°。
  20. 根据权利要求15所述的OLED显示面板,其中,所述OLED显示面板还包括至少一复合层,所述复合层包括层叠设置的有机层和无机层;
    所述复合层设置在所述OLED基板和所述保护层之间。
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