WO2018148999A1 - 有机电致发光显示装置 - Google Patents

有机电致发光显示装置 Download PDF

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Publication number
WO2018148999A1
WO2018148999A1 PCT/CN2017/076312 CN2017076312W WO2018148999A1 WO 2018148999 A1 WO2018148999 A1 WO 2018148999A1 CN 2017076312 W CN2017076312 W CN 2017076312W WO 2018148999 A1 WO2018148999 A1 WO 2018148999A1
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Prior art keywords
display device
organic
organic electroluminescence
electroluminescence display
layer
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PCT/CN2017/076312
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English (en)
French (fr)
Inventor
白丹
李先杰
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US15/524,910 priority Critical patent/US20190393449A1/en
Publication of WO2018148999A1 publication Critical patent/WO2018148999A1/zh
Anticipated expiration legal-status Critical
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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
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10K50/844—Encapsulations
    • 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
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H10D86/411—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs characterised by materials, geometry or structure of the substrates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H10D86/421—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
    • 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
    • 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
    • H10K2102/302—Details of OLEDs of OLED structures
    • H10K2102/3023—Direction of light emission
    • H10K2102/3026—Top emission
    • 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
    • H10K2102/331—Nanoparticles used in non-emissive layers, e.g. in packaging layer
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • 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
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations

Definitions

  • the present invention relates to the field of display technologies, and in particular, to an organic electroluminescence display device.
  • OLED Organic Light Emitting Display, organic light-emitting display
  • LCD liquid crystal display
  • no backlight is required
  • very thin organic material coating and glass substrate when the current passes, these organic materials will emit light.
  • the OLED display screen can be made lighter and thinner, has a larger viewing angle, and can significantly save power, and is therefore recognized as the most promising display device in the industry.
  • OLED devices can be classified into a top emission type, a bottom emission type, and a penetration type according to the light emission mode.
  • the light of the top emission type OLED device is emitted from the side of the top electrode, and the light radiation can be divided into three modes: an external mode transmitted to the air, a waveguide mode restricted to the organic body, and a limitation at the interface between the metal and the dielectric.
  • Surface plasma mode In the conventional top-emitting OLED device, the waveguide mode and the plasma mode have a high proportion of light, and the ratio of the light in the external mode is too low, resulting in a problem that the light extraction rate is too low.
  • Embodiments of the present invention provide an organic electroluminescence display device including: a substrate, an organic electroluminescence structure, and a display screen;
  • the organic electroluminescent structure is disposed between the substrate and the display screen for emitting light to the display screen;
  • the display screen includes an organic photoresist layer doped with nanoparticles, the nanoparticles having a function of refracting light emitted by the organic electroluminescent structure to the outside;
  • the nanoparticle in the organic photoresist layer has a mass fraction of 5% and a diameter of 200-400 nm.
  • the nanoparticles are dissolved in the organic photoresist layer using toluene as a solvent.
  • the nanoparticles include titanium dioxide.
  • the organic electroluminescence display device further includes a thin film encapsulation layer disposed between the organic electroluminescence structure and the display screen.
  • the display screen further includes a capacitor layer disposed between the thin film encapsulation layer and the organic photoresist layer.
  • the capacitor layer is composed of a plurality of capacitors, the capacitor including a first metal layer, a second metal layer, and the first metal layer, the second An insulating layer between the metal layers.
  • the organic electroluminescence display device further includes a low temperature polysilicon thin film transistor disposed between the substrate and the organic electroluminescent structure .
  • the organic electroluminescence display device further includes a polyimide layer disposed on the substrate and the low temperature polysilicon thin film transistor between.
  • the organic electroluminescent structure is a top-emitting organic electroluminescent structure.
  • An embodiment of the present invention further provides an organic electroluminescence display device, including: a substrate, an organic electroluminescent structure, and a display screen;
  • the organic electroluminescent structure is disposed between the substrate and the display screen for emitting light to the display screen;
  • the display screen includes an organic photoresist layer doped with nanoparticles, the nanoparticles having a function of refracting light emitted by the organic electroluminescent structure to the outside.
  • the mass fraction of the nanoparticles in the organic photoresist layer is 5%.
  • the nanoparticles are dissolved in the organic photoresist layer using toluene as a solvent.
  • the nanoparticles have a diameter of 200 to 400 nm.
  • the nanoparticles include titanium dioxide.
  • the organic electroluminescence display device further includes a thin film encapsulation layer disposed between the organic electroluminescence structure and the display screen.
  • the display screen further includes a capacitor layer disposed between the thin film encapsulation layer and the organic photoresist layer.
  • the capacitor layer is composed of a plurality of capacitors, the capacitor including a first metal layer, a second metal layer, and the first metal layer, the second An insulating layer between the metal layers.
  • the organic electroluminescence display device further includes a low temperature polysilicon thin film transistor disposed between the substrate and the organic electroluminescent structure .
  • the organic electroluminescence display device further includes a polyimide layer disposed on the substrate and the low temperature polysilicon thin film transistor between.
  • the organic electroluminescent structure is a top-emitting organic electroluminescent structure.
  • the organic electroluminescence display device of the present invention improves the light extraction rate of the organic electroluminescence structure by adding nanoparticles to the organic photoresist layer of the display screen.
  • FIG. 1 is a schematic structural diagram of an organic electroluminescence display device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of another organic electroluminescent display device according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of still another organic electroluminescent display device according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of still another organic electroluminescent display device according to an embodiment of the present invention.
  • references to "an embodiment” herein mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the invention.
  • the appearances of the phrases in various places in the specification are not necessarily referring to the same embodiments, and are not exclusive or alternative embodiments that are mutually exclusive. Those skilled in the art will understand and implicitly understand that the embodiments described herein can be combined with other embodiments.
  • FIG. 1 is a schematic structural diagram of an organic electroluminescent device according to an embodiment of the present invention.
  • the organic electroluminescent display device 1000 includes a substrate 100, an organic electroluminescent structure 200, and a display screen 300.
  • the organic electroluminescent structure 200 is disposed between the substrate 100 and the display screen 300.
  • the substrate 100 is a glass substrate.
  • the organic electroluminescent structure 200 is a sandwich structure comprising an anode, a cathode, and a light-emitting layer sandwiched between the anode and the cathode.
  • a transparent electrode made of indium tin oxide material is used as an anode, and then a single layer or a plurality of organic thin films are formed on the anode by vapor deposition or spin coating to form a light-emitting layer, and finally a metal having a low work function is formed on the light-emitting layer.
  • a metal such as magnesium or calcium.
  • the organic electroluminescent structure 200 is a top-emitting organic electroluminescent structure, that is, light emitted by the luminescent layer is emitted toward the side of the display screen 300.
  • the organic electroluminescent structure 200 is an active matrix organic light emitting diode (Active) Matrix Organic Light Emitting Diode, AMOLED).
  • the display screen 300 includes an organic photoresist layer 30 doped with nanoparticles, the nanoparticles having light emitted from the organic electroluminescent structure toward the display screen 300 to the outside world. effect.
  • the nanoparticles are 200-400 nm in diameter and are dissolved in the organic photoresist layer 30 with toluene as a solvent, and the mass fraction in the organic photoresist layer 30 is 5%.
  • the nanoparticles include nanoparticles having a high refractive index such as titanium dioxide.
  • the toluene is used as a solvent to dope the organic particles in the organic photoresist, so that the mass fraction of the nanoparticles reaches 5%. Then, sufficient agitation is performed to uniformly disperse the nanoparticles in the organic photoresist to form a scattering film having a relatively high refractive index. Finally, it is coated on the organic electroluminescent structure 200.
  • the organic electroluminescent structure 200 when the organic electroluminescent structure 200 emits light to the display screen 300, when the light passes through the organic photoresist layer 30, the nanoparticles therein refract light to the outside, thereby causing more light to be Scattering increases the light-emitting rate of the organic electroluminescent structure by 40-60%.
  • FIG. 2 is still another schematic structural diagram of an organic electroluminescent device according to an embodiment of the present invention.
  • the metal cathode in the organic electroluminescent structure 200 is generally an active metal such as aluminum, magnesium or calcium, it is very easy to react with the influent water vapor, which affects the injection of electric charge.
  • the infiltrated water and oxygen also react chemically with organic materials, resulting in reduced device performance. Therefore, as shown in FIG. 2, a thin film encapsulation layer 400 is disposed in the organic electroluminescent display device 1000 by a thin film encapsulation technique, and the thin film encapsulation layer 400 is disposed on the organic electroluminescent structure 200 and the display screen 300. Between the two, the organic electroluminescent structure 200 is protected from external moisture and oxygen, and functions as a package.
  • Metal can also be used
  • the organic electroluminescent structure 200 is packaged by technologies such as Can package technology, Glass packaging technology, and Hybrid packaging technology.
  • the organic electroluminescent structure 200 When the organic electroluminescent structure 200 emits light to the display screen 300, the light sequentially passes through the thin film encapsulation layer 400 and the organic photoresist layer 30, and is first refracted by the thin film encapsulation layer 400 to the organic photoresist layer 30, and then organically
  • the nanoparticles in the photoresist layer 30 are refracted to the outside, so that more light is scattered, and the light-emitting rate of the organic electroluminescent structure is increased by 40-60%.
  • the display screen 300 is a touch screen.
  • the display screen 300 further includes a capacitor layer 31 disposed between the thin film encapsulation layer 400 and the organic photoresist layer 30 for detecting a touch capacitance.
  • the capacitor layer 31 is composed of a plurality of capacitors, and the capacitor includes a first metal layer 311, a second metal layer 312, and an insulating layer 313 between the first metal layer 311 and the second metal layer 312.
  • the first metal layer 311 and the second metal layer 312 are made of titanium/aluminum/titanium, and the insulating layer 313 is made of silicon nitride.
  • the organic electroluminescent structure 200 emits light to the display screen 300
  • the light sequentially passes through the thin film encapsulation layer 400, the capacitor layer 31, and the organic photoresist layer 30, first by the thin film encapsulation layer 400
  • the capacitor layer 31 is refracted to the organic photoresist layer 30 and refracted by the nanoparticles in the organic photoresist layer 30 to the outside, thereby causing more light to be scattered, thereby improving the light-emitting rate of the organic electroluminescent structure by 40-60%.
  • the organic electroluminescent display device 1000 further includes a thin film transistor.
  • the organic electroluminescent display device 1000 further includes a low temperature polysilicon thin film transistor 500 disposed between the substrate 100 and the organic electroluminescent structure 200.
  • the organic electroluminescent display device 1000 further includes a polyimide (PI) layer 600 disposed on the substrate 100 and the low temperature polysilicon film. Between transistors 500. Specifically, the substrate 100 is first cleaned, then the PI liquid is coated on the substrate 100, and finally heated to form a PI layer.
  • PI polyimide
  • the PI layer may also be replaced with a coating of polyimide, polyacrylic resin, polyvinyl acid material.
  • the organic electroluminescence display device of the present invention increases the light extraction rate of the organic electroluminescence structure by adding nanoparticles to the organic photoresist layer of the display screen.

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

Abstract

提供了一种有机电致发光显示装置，包括：基板（100）、有机电致发光结构（200）以及显示屏（300）；所述有机电致发光结构（200）设置在所述基板（100）和所述显示屏（300）之间，用于向所述显示屏（300）发射光；所述显示屏（300）包括有机光阻层（30），所述有机光阻层掺杂纳米粒子，所述纳米粒子具有将所述有机电致发光结构发射的光折射到外界的作用。通过在显示屏的有机光阻层中添加纳米粒子，提高了有机电致发光显示装置的出光率。

Description

有机电致发光显示装置 技术领域
本发明涉及显示技术领域，特别是涉及一种有机电致发光显示装置。
 背景技术
OLED（Organic Light Emitting Display,有机发光显示）显示技术与传统的LCD显示方式不同，无需背光灯，采用非常薄的有机材料涂层和玻璃基板，当有电流通过时，这些有机材料就会发光。而且OLED显示屏幕可以做的更轻更薄，可视角度更大，并且能够显著节省电能，因此被业界公认为最具发展潜力的显示装置。
OLED器件根据发光方式可以分为顶发射型、底发射型和穿透型。其中，顶发射型OLED器件的光从顶电极一侧发射，其光辐射可以分为三个模式：即传输到空气中的外部模式，限制在有机物中的波导模式以及限制在金属和电介质界面的表面等离子体模式。现有的顶发光OLED器件存在波导模式、等离子体模式的光比例过高，外部模式的光比例过低，造成光取出率过低的问题。
 技术问题
本发明的目的在于提供一种有机电致发光显示装置，可以提高出光率。
 技术解决方案
本发明实施例提供一种有机电致发光显示装置，其包括：基板、有机电致发光结构以及显示屏；
所述有机电致发光结构设置在所述基板和所述显示屏之间，用于向所述显示屏发射光；
所述显示屏包括有机光阻层，所述有机光阻层掺杂纳米粒子，所述纳米粒子具有将所述有机电致发光结构发射的光折射到外界的作用；
其中，所述有机光阻层中所述纳米粒子的质量分数为5%，直径为200-400纳米。
在本发明所述的有机电致发光显示装置中，所述纳米粒子以甲苯作为溶剂溶入所述有机光阻层中。
在本发明所述的有机电致发光显示装置中，所述纳米粒子包括二氧化钛。
在本发明所述的有机电致发光显示装置中，所述有机电致发光显示装置还包括薄膜封装层，所述薄膜封装层设置在所述有机电致发光结构与所述显示屏之间。
在本发明所述的有机电致发光显示装置中，所述显示屏还包括电容层，所述电容层设置在所述薄膜封装层和所述有机光阻层之间。
在本发明所述的有机电致发光显示装置中，所述电容层由多个电容器组成，所述电容器包括第一金属层、第二金属层和位于所述第一金属层、所述第二金属层之间的绝缘层。
在本发明所述的有机电致发光显示装置中，所述有机电致发光显示装置还包括低温多晶硅薄膜晶体管，所述低温多晶硅薄膜晶体管设置在所述基板和所述有机电致发光结构之间。
在本发明所述的有机电致发光显示装置中，所述有机电致发光显示装置还包括聚酰亚胺层，所述聚酰亚胺层设置在所述基板和所述低温多晶硅薄膜晶体管之间。
在本发明所述的有机电致发光显示装置中，所述有机电致发光结构为顶发光的有机电致发光结构。
本发明实施例还提供一种有机电致发光显示装置，其包括：基板、有机电致发光结构以及显示屏；
所述有机电致发光结构设置在所述基板和所述显示屏之间，用于向所述显示屏发射光；
所述显示屏包括有机光阻层，所述有机光阻层掺杂纳米粒子，所述纳米粒子具有将所述有机电致发光结构发射的光折射到外界的作用。
在本发明所述的有机电致发光显示装置中，所述有机光阻层中所述纳米粒子的质量分数为5%。
在本发明所述的有机电致发光显示装置中，所述纳米粒子以甲苯作为溶剂溶入所述有机光阻层中。
在本发明所述的有机电致发光显示装置中，所述纳米粒子直径为200-400纳米。
在本发明所述的有机电致发光显示装置中，所述纳米粒子包括二氧化钛。
在本发明所述的有机电致发光显示装置中，所述有机电致发光显示装置还包括薄膜封装层，所述薄膜封装层设置在所述有机电致发光结构与所述显示屏之间。
在本发明所述的有机电致发光显示装置中，所述显示屏还包括电容层，所述电容层设置在所述薄膜封装层和所述有机光阻层之间。
在本发明所述的有机电致发光显示装置中，所述电容层由多个电容器组成，所述电容器包括第一金属层、第二金属层和位于所述第一金属层、所述第二金属层之间的绝缘层。
在本发明所述的有机电致发光显示装置中，所述有机电致发光显示装置还包括低温多晶硅薄膜晶体管，所述低温多晶硅薄膜晶体管设置在所述基板和所述有机电致发光结构之间。
在本发明所述的有机电致发光显示装置中，所述有机电致发光显示装置还包括聚酰亚胺层，所述聚酰亚胺层设置在所述基板和所述低温多晶硅薄膜晶体管之间。
在本发明所述的有机电致发光显示装置中，所述有机电致发光结构为顶发光的有机电致发光结构。
 有益效果
相较于现有的有机电致发光显示装置，本发明的有机电致发光显示装置通过在显示屏的有机光阻层中添加纳米粒子，提高了有机电致发光结构的出光率。
 附图说明
为让本发明的上述内容能更明显易懂，下文特举优选实施例，并配合所附图式，作详细说明如下：
图1为本发明实施例提供的有机电致发光显示装置的结构示意图；
图2为本发明实施例提供的另一有机电致发光显示装置的结构示意图；
图3为本发明实施例提供的又一有机电致发光显示装置的结构示意图；
图4为本发明实施例提供的再一有机电致发光显示装置的结构示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，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，结构相似的单元是以相同标号表示。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本发明的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
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。
请参照图1，图1为本发明实施例提供的有机电致发光装置的结构示意图。所述有机电致发光显示装置1000包括基板100、有机电致发光结构200以及显示屏300。
其中，所述有机电致发光结构200设置在所述基板100和所述显示屏300之间。其中所述基板100为玻璃基板。
所述有机电致发光结构200为夹层式结构，包括阳极、阴极和夹在阳极、阴极之间的发光层。具体采用氧化铟锡材料制成的透明电极作为阳极，然后在阳极上采用蒸镀法或者旋涂法制备单层或者多层有机薄膜即形成发光层，最后在发光层上制作功函数低的金属作为阴极，比如镁、钙等金属。
在一些实施例中，所述有机电致发光结构200为顶发光的有机电致发光结构，即所述发光层发出的光向所述显示屏300一侧发射。在一些实施例中，所述有机电致发光结构200为主动矩阵有机发光二极体（Active Matrix Organic Light Emitting Diode，AMOLED）。
所述显示屏300包括有机光阻层30，所述有机光阻层30掺杂纳米粒子，所述纳米粒子具有将所述有机电致发光结构向显示屏300一侧发射的光折射到外界的作用。
在一些实施例中，所述纳米粒子直径为200-400纳米，以甲苯作为溶剂溶入所述有机光阻层30中，在有机光阻层30中的质量分数为5%。所述纳米粒子包括二氧化钛等具有高折射率的纳米粒子。
具体的，以甲苯作为溶剂在有机光阻里掺杂纳米粒子，使纳米粒子的质量分数达到5%为止。然后进行充分的搅拌，使纳米粒子均匀的分散在有机光阻中，形成折射率较高的散射膜。最后再将其涂布在有机电致发光结构200上。
如图1所示，当有机电致发光结构200向显示屏300发射光时，光经过所述有机光阻层30时，其内的纳米粒子将光折射到外界，从而使更多的光被散射出来，提高了有机电致发光结构40-60%的出光率。
请参照图2，图2为本发明实施例提供的有机电致发光装置的又一结构示意图。由于有机电致发光结构200中的金属阴极一般是铝、镁、钙等活泼金属，非常容易与外界渗透进来的水汽发生反应，影响电荷的注入。同时，渗透进来的水和氧气还会与有机材料发生化学反应，导致器件性能下降。因此如图2所示，采用薄膜封装技术在所述有机电致发光显示装1000中设置薄膜封装层400，所述薄膜封装层400设置在所述有机电致发光结构200与所述显示屏300之间，用于保护所述有机电致发光结构200不受外部水分、氧气的侵蚀，起到封装的作用。
在一些实施例，还可以采用Metal Can封装技术、Glass封装技术、及Hybrid封装技术等技术对有机电致发光结构200进行封装。
当有机电致发光结构200向显示屏300发射光时，光依次经过所述薄膜封装层400、所述有机光阻层30，先被薄膜封装层400折射至有机光阻层30，再被有机光阻层30内的纳米粒子折射到外界，从而使更多的光被散射出来，提高了有机电致发光结构40-60%的出光率。
在一些实施例中，该显示屏300为触摸屏。请参照图3，所述显示屏300还包括电容层31，所述电容层31设置在所述薄膜封装层400和所述有机光阻层30之间，用于检测触摸电容。其中电容层31由多个电容器组成，电容器包括第一金属层311、第二金属层312和位于所述第一金属层311、第二金属层312之间的绝缘层313。所述第一金属层311和所述第二金属层312为钛/铝/钛材质，所述绝缘层313为氮化硅材质。
当有机电致发光结构200向显示屏300发射光时，光依次经过所述薄膜封装层400、所述电容层31、所述有机光阻层30，先被所述薄膜封装层400、所述电容层31折射至有机光阻层30，再被有机光阻层30内的纳米粒子折射到外界，从而使更多的光被散射出来，提高了有机电致发光结构40-60%的出光率。
在一些实施例中，所述有机电致发光显示装置1000中还包括薄膜晶体管。请参照图4，所述有机电致发光显示装置1000还包括低温多晶硅薄膜晶体管500，所述低温多晶硅薄膜晶体管500设置在所述基板100和所述有机电致发光结构200之间。
在一些实施例中，请参照图4，所述有机电致发光显示装1000还包括聚酰亚胺（Polyimide，PI）层600，所述PI层设置在所述基板100和所述低温多晶硅薄膜晶体管500之间。具体的先对基板100进行清洗，然后在基板100上涂覆PI液，最后加热成膜形成PI层。
在一些实施例中，所述PI层还可以用聚酰亚胺、聚丙烯酸树脂、聚乙烯酸材料的涂层代替。
本发明的有机电致发光显示装置通过在显示屏的有机光阻层中添加纳米粒子，提高了有机电致发光结构的出光率。
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 (20)

  1. 一种有机电致发光显示装置，其包括：基板、有机电致发光结构以及显示屏；
    所述有机电致发光结构设置在所述基板和所述显示屏之间，用于向所述显示屏发射光；
    所述显示屏包括有机光阻层，所述有机光阻层掺杂纳米粒子，所述纳米粒子具有将所述有机电致发光结构发射的光折射到外界的作用；
    其中，所述有机光阻层中所述纳米粒子的质量分数为5%，直径为200-400纳米。
  2. 根据权利要求1所述的有机电致发光显示装置，其中所述纳米粒子以甲苯作为溶剂溶入所述有机光阻层中。
  3. 根据权利要求1所述的有机电致发光显示装置，其中所述纳米粒子包括二氧化钛。
  4. 根据权利要求1所述的有机电致发光显示装置，其中所述有机电致发光显示装置还包括薄膜封装层，所述薄膜封装层设置在所述有机电致发光结构与所述显示屏之间。
  5. 根据权利要求4所述的有机电致发光显示装置，其中所述显示屏还包括电容层，所述电容层设置在所述薄膜封装层和所述有机光阻层之间。
  6. 根据权利要求5所述的有机电致发光显示装置，其中所述电容层由多个电容器组成，所述电容器包括第一金属层、第二金属层和位于所述第一金属层、所述第二金属层之间的绝缘层。
  7. 根据权利要求1所述的有机电致发光显示装置，其中所述有机电致发光显示装置还包括低温多晶硅薄膜晶体管，所述低温多晶硅薄膜晶体管设置在所述基板和所述有机电致发光结构之间。
  8. 根据权利要求7所述的有机电致发光显示装置，其中所述有机电致发光显示装置还包括聚酰亚胺层，所述聚酰亚胺层设置在所述基板和所述低温多晶硅薄膜晶体管之间。
  9. 根据权利要求1所述的有机电致发光显示装置，其中所述有机电致发光结构为顶发光的有机电致发光结构。
  10. 一种有机电致发光显示装置，其包括：基板、有机电致发光结构以及显示屏；
    所述有机电致发光结构设置在所述基板和所述显示屏之间，用于向所述显示屏发射光；
    所述显示屏包括有机光阻层，所述有机光阻层掺杂纳米粒子，所述纳米粒子具有将所述有机电致发光结构发射的光折射到外界的作用。
  11. 根据权利要求10所述的有机电致发光显示装置，其中所述有机光阻层中所述纳米粒子的质量分数为5%。
  12. 根据权利要求10所述的有机电致发光显示装置，其中所述纳米粒子以甲苯作为溶剂溶入所述有机光阻层中。
  13. 根据权利要求10所述的有机电致发光显示装置，其中所述纳米粒子直径为200-400纳米。
  14. 根据权利要求10所述的有机电致发光显示装置，其中所述纳米粒子包括二氧化钛。
  15. 根据权利要求10所述的有机电致发光显示装置，其中所述有机电致发光显示装置还包括薄膜封装层，所述薄膜封装层设置在所述有机电致发光结构与所述显示屏之间。
  16. 根据权利要求15所述的有机电致发光显示装置，其中所述显示屏还包括电容层，所述电容层设置在所述薄膜封装层和所述有机光阻层之间。
  17. 根据权利要求16所述的有机电致发光显示装置，其中所述电容层由多个电容器组成，所述电容器包括第一金属层、第二金属层和位于所述第一金属层、所述第二金属层之间的绝缘层。
  18. 根据权利要求10所述的有机电致发光显示装置，其中所述有机电致发光显示装置还包括低温多晶硅薄膜晶体管，所述低温多晶硅薄膜晶体管设置在所述基板和所述有机电致发光结构之间。
  19. 根据权利要求18所述的有机电致发光显示装置，其中所述有机电致发光显示装置还包括聚酰亚胺层，所述聚酰亚胺层设置在所述基板和所述低温多晶硅薄膜晶体管之间。
  20. 根据权利要求10所述的有机电致发光显示装置，其中所述有机电致发光结构为顶发光的有机电致发光结构。
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CN106024834A (zh) * 2016-05-31 2016-10-12 京东方科技集团股份有限公司 Oled显示面板、显示装置及oled显示面板的制作方法

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