WO2018028098A1 - 一种高亮度oled显示器 - Google Patents

一种高亮度oled显示器 Download PDF

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Publication number
WO2018028098A1
WO2018028098A1 PCT/CN2016/108318 CN2016108318W WO2018028098A1 WO 2018028098 A1 WO2018028098 A1 WO 2018028098A1 CN 2016108318 W CN2016108318 W CN 2016108318W WO 2018028098 A1 WO2018028098 A1 WO 2018028098A1
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layer
sub
cathode
anode
luminescent material
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PCT/CN2016/108318
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English (en)
French (fr)
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夏大学
李仲儒
欧木兰
陈春荣
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深圳市国显科技有限公司
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Publication of WO2018028098A1 publication Critical patent/WO2018028098A1/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
    • H10K59/10—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
    • H10K59/805—Electrodes
    • H10K59/8051—Anodes
    • H10K59/80517—Multilayers, e.g. transparent multilayers
    • 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
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80523—Multilayers, e.g. opaque multilayers

Definitions

  • the present invention relates to the field of OLED display technology, and particularly relates to improvement of a pixel body structure of an OLED display.
  • OLED display technology has developed rapidly in recent years and is widely used in mobile phones, computers, industrial instruments, home appliances, and the like.
  • OLED display technology has many advantages such as fast response, active illumination, wide viewing angle, high contrast, stable shock resistance, etc., and is regarded as the best alternative technology for next-generation high-performance displays.
  • OLEDs also face some difficulties, especially the relatively low luminous efficiency, resulting in low display brightness.
  • each sub-pixel is formed of a luminescent material and an electrode, and the luminescent material is tiling in a single layer, and the space utilization rate is not high, so that the illuminance is limited.
  • the purpose of the present invention is to solve the technical deficiencies of the existing OLED display with low brightness, and to provide a high-brightness OLED display.
  • a high-brightness OLED display comprising a display pixel having a substrate and a matrix arranged on the substrate, each display pixel comprising at least one anode a cathode body composed of a cathode and a layer of luminescent material sandwiched between the anode and the cathode; wherein: the anode and the cathode are both transparent electrodes, and the anode and the cathode comprise two or more sub-electrode layers adjacent to each other A cathode sub-electrode layer is disposed in the interlayer between the two anode sub-electrode layers, and a layer of luminescent material is disposed in the interlayer between the adjacent anode sub-electrode layer and the cathode sub-electrode layer.
  • each luminescent material layer has a serpentine structure in a cross section around the interlayer between the anode sub-electrode layer and the cathode sub-electrode layer.
  • the substrate is a transparent substrate.
  • An insulating layer is disposed between the substrate and the pixel main body, and a TFT driving circuit for driving the pixel main body is disposed at a position corresponding to each pixel main body in the insulating layer.
  • the luminescent material layer and the cathode sub-electrode layer further comprise one of an electron injection layer, an electron transport layer, and a hole blocking layer, or a combination of two or more layers; the luminescent material layer and the anode sub-electrode The layer further includes one of a hole injection layer, a hole transport layer, and an electron blocking layer, or a combination of two or more layers
  • the luminescent material layer is a small molecule luminescent material or a high molecular polymer luminescent material or a mixture of the two.
  • the utility model has the beneficial effects that: the pixel body of the utility model adopts the traditional single-layer electrode to be changed into a multi-layer sub-electrode, which can increase the area of the luminescent material within a limited occupied area, and significantly improve the illuminance per unit area. Brightness; Improve space utilization, reduce luminous current, reduce power consumption, and extend the life of luminescent materials under the same brightness requirements.
  • FIG. 1 is a schematic structural view of a conventional OLED display
  • FIG. 2 is a schematic view showing a structure of a PMOLED display using a two-layer anode sub-electrode layer and a cathode sub-electrode layer;
  • 3 is a schematic view showing a structure of a PMOLED display using two layers of anode sub-electrode layers and two layers of cathode sub-electrode layers;
  • FIG. 4 is a schematic structural view of an AMOLED display device according to the present invention.
  • the high-brightness OLED display of the present invention includes a substrate 1 and a matrix arranged in Display pixels on the substrate, each display pixel comprising at least one pixel body composed of an anode 21, a cathode 22 and a layer of luminescent material 23 sandwiched between the anode 21 and the cathode 22; for a color OLED display, each display pixel is generally Contains three pixel bodies for displaying red, green, and blue colors, respectively.
  • the anode 21 and the cathode 22 are both transparent electrodes, the anode 21 comprises two layers of anode sub-electrode layers, the cathode 22 comprises a cathode sub-electrode layer, and the cathode sub-electrode layer is disposed between the two anode sub-electrode layers.
  • a layer of luminescent material is disposed in the interlayer between the cathode sub-electrode layer and the two-layer anode sub-electrode layer.
  • the anode subelectrode layer, the luminescent material layer and the cathode subelectrode layer can be formed on the substrate 1 by a conventional vapor deposition method or by a liquid phase method such as spin coating or printing.
  • the anode 21 includes two layers of anode sub-electrode layers
  • the cathode 22 also includes two layers of cathode sub-electrode layers, and each anode sub-electrode layer and each cathode sub-electrode layer are alternately distributed, and adjacent anodes are adjacent.
  • a layer of luminescent material 23 is provided in the interlayer between the electrode layer and the cathode sub-electrode layer.
  • each luminescent material layer has a serpentine structure in a cross section around the interlayer between the anode sub-electrode layer and the cathode sub-electrode layer. That is, the adjacent anode sub-electrode layer and the cathode sub-electrode layer are separated by a luminescent material.
  • the luminescent material layer is a small molecule luminescent material or a high molecular polymer luminescent material or a mixture of the two.
  • the luminescent material layer and the cathode sub-electrode layer further include one of an electron injection layer, an electron transport layer, and a hole blocking layer, or a combination of two or more layers; the luminescent material layer and the anode sub-electrode layer. Also included is one of a hole injection layer, a hole transport layer, and an electron block layer, or a combination of two or more layers.
  • both the anode and the cathode are transparent electrodes, and the substrate 1 is a transparent substrate, the technical effect of the fully transparent display can be achieved.
  • the anode or the cathode comprises two or more sub-electrode layers, or both the anode and the cathode comprise two or more sub-electrode layers, and two different sub-electrode layers are alternately stacked.
  • the two different sub-electrode layers are separated by a layer of luminescent material. In a limited mouth space, a larger area of luminescent material can be tiled, thereby increasing the brightness of the pixel body by several times.
  • an insulating layer 3 is disposed between the substrate 1 and the pixel body, and a TFT driving circuit 4 for driving the pixel body is disposed at a position corresponding to each pixel body in the insulating layer 3;
  • the utility model is applicable not only to the above-mentioned PMOLED display but also to the AMOLED display, and the TF T driving circuit is added to each sub-pixel.

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  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种高亮度OLED显示器，包括有基板（1）和矩阵排布在基板（1）上的显示像素，每个显示像素至少包含一个由阳极（21）、阴极（22）及夹于阳极（21）和阴极（22）之间的发光材料层（23）构成的像素主体；其特征在于：阳极（21）和阴极（22）均为透明电极，阳极（21）和/或阴极（22）包含两层以上的子电极层，相邻两阳极子电极层之间的夹层中设有阴极子电极层，相邻的阳极子电极层与阴极子电极层之间的夹层中设有发光材料层。能够提高空间利用率，提高单位面积的发光亮度。

Description

一种高亮度 OLED显示器 技术领域
[0001] 本实用新型涉及到 OLED显示器技术领域， 具体涉及到 OLED显示器的像素主 体结构改进方面。
背景技术
[0002] 平板显示技术近年来发展迅速， 广泛应用于手机、 电脑、 工业仪器以及家电等 等。 其中 OLED显示技术具有快速响应， 主动发光， 视角宽， 高对比度， 稳定抗 震性好等诸多优势， 被视为下一代高性能显示器的最佳替代技术。 虽然发展迅 猛， 但 OLED也面临些困难点， 尤其是发光效率相对较低， 导致显示亮度偏低。
[0003] 参照图 1中所示， 传统 OLED显示器中每个子像素由发光材料以及电极形成的三 明治结构， 发光材料单层平铺， 空间利用率不高， 因而发光亮度受到限制。 技术问题
[0004] 综上所述， 本实用新型的目的在于解决现有的 OLED显示器显示亮度偏低的技 术不足， 而提出一种高亮度 OLED显示器。
问题的解决方案
技术解决方案
[0005] 为解决本实用新型所提出的技术问题， 采用的技术方案为： 一种高亮度 OLED 显示器， 包括有基板和矩阵排布在基板上的显示像素， 每个显示像素至少包含 一个由阳极、 阴极及夹于阳极与阴极之间的发光材料层构成的像素主体； 其特 征在于： 所述的阳极和阴极均为透明电极， 阳极和 \或阴极包含两层以上的子电 极层， 相邻两阳极子电极层之间的夹层中设有阴极子电极层， 相邻的阳极子电 极层与阴极子电极层之间的夹层中设有发光材料层。
[0006] 作为发明进一步改进的技术方案的为：
[0007] 所述的相邻两发光材料层边缘相连接， 各发光材料层截面为绕各阳极子电极层 和阴极子电极层之间夹层往返的蛇形结构。
[0008] 所述的基板为透明基板。 [0009] 所述的基板与像素主体之间设有绝缘层， 在绝缘层中与各像素主体对应位置设 有用于驱动像素主体的 TFT驱动电路。
[0010] 所述的发光材料层与阴极子电极层之间还包含电子注入层、 电子传输层、 空穴 阻挡层中的其中一层， 或两层以上的组合； 发光材料层与阳极子电极层之间还 包含空穴注入层、 空穴传输层及电子阻挡层中的其中一层， 或两层以上的组合
[0011] 所述的发光材料层采用小分子发光材料或者高分子聚合物发光材料或者是两者 的混合物。
发明的有益效果
有益效果
[0012] 本实用新型的有益效果为： 本实用新型的像素主体采用将传统单层电极改为多 层子电极， 可以在有限的占有面积内增大发光材料的面积， 显著提高单位面积 的发光亮度； 提高空间利用率， 在相同亮度需求下， 可以降低发光电流， 减少 功耗， 延长发光材料的寿命。
对附图的简要说明
附图说明
[0013] 图 1为本传统 OLED显示器的结构示意图；
[0014] 图 2为本实用新型为 PMOLED显示器， 且采用两层阳极子电极层和一层阴极子 电极层吋的结构示意图；
[0015] 图 3为本实用新型为 PMOLED显示器， 且采用两层阳极子电极层和两层阴极子 电极层吋的结构示意图；
[0016] 图 4为本实用新型为 AMOLED显示器吋的结构示意图。
实施该发明的最佳实施例
本发明的最佳实施方式
[0017] 以下结合附图和本实用新型优选的具体的实施例对本实用新型的结构作进一步 地说明。
[0018] 参照图 2中所示， 本实用新型高亮度 OLED显示器， 包括有基板 1和矩阵排布在 基板上的显示像素， 每个显示像素至少包含一个由阳极 21、 阴极 22及夹于阳极 2 1与阴极 22之间的发光材料层 23构成的像素主体； 对于彩色 OLED显示器， 每个 显示像素一般包含有用于分别显示红、 绿、 蓝三色的三个像素主体。
[0019] 所述的阳极 21和阴极 22均为透明电极， 阳极 21包含两层阳极子电极层， 阴极 22 包含一层阴极子电极层， 阴极子电极层设于两层阳极子电极层之间， 阴极子电 极层与两层阳极子电极层之间的夹层中设有发光材料层。 阳极子电极层、 发光 材料层及阴极子电极层可以采用现有的蒸镀方法或者采用旋涂或印刷等液相方 法成膜于基板 1上。
[0020] 参照图 3中所示， 阳极 21包含两层阳极子电极层， 阴极 22也包含两层阴极子电 极层， 各阳极子电极层与各阴极子电极层交替分布， 相邻的阳极子电极层与阴 极子电极层之间的夹层中设有发光材料层 23。
[0021] 所述的相邻两发光材料层 23边缘相连接， 各发光材料层截面为绕各阳极子电极 层和阴极子电极层之间夹层往返的蛇形结构。 也即是相邻的阳极子电极层与阴 极子电极层之间通过发光材料进行隔离。 发光材料层采用小分子发光材料或者 高分子聚合物发光材料或者两者的混合物。 根据需要所述的发光材料层与阴极 子电极层之间还包含电子注入层、 电子传输层、 空穴阻挡层中的其中一层， 或 两层以上的组合； 发光材料层与阳极子电极层之间还包含空穴注入层、 空穴传 输层及电子阻挡层中的其中一层， 或两层以上的组合。
[0022] 由于阳极和阴极均为透明电极， 基板 1采用透明基板， 则可实现全透明显示器 的技术效果。
[0023] 按照图 2和图 3的原理推导， 可以实现阳极或阴极包含两层以上的子电极层， 或 者阳极和阴极均包含两层以上的子电极层， 两种不同子电极层交替堆叠， 两种 不同子电极层之间通过发光材料层进行隔离。 在有限的幵口空间， 可以平铺更 大面积的发光材料， 从而可以将像素主体的发光亮度提升数倍。
[0024] 参照图 4中所示， 基板 1与像素主体之间设有绝缘层 3， 在绝缘层 3中与各像素主 体对应位置设有用于驱动像素主体的 TFT驱动电路 4; 也即是本实用新型不仅适 用于上述 PMOLED显示器， 也适用于 AMOLED显示器， 在每个子像素上增加 TF T驱动电路。

Claims

权利要求书
一种高亮度 OLED显示器， 包括有基板和矩阵排布在基板上的显示像 素， 每个显示像素至少包含一个由阳极、 阴极及夹于阳极与阴极之间 的发光材料层构成的像素主体； 其特征在于： 所述的阳极和阴极均为 透明电极， 阳极和 \或阴极包含两层以上的子电极层， 相邻两阳极子 电极层之间的夹层中设有阴极子电极层， 相邻的阳极子电极层与阴极 子电极层之间的夹层中设有发光材料层。
根据权利要求 1所述的一种高亮度主动发光显示器， 其特征在于： 所 述的相邻两发光材料层边缘相连接， 各发光材料层截面为绕各阳极子 电极层和阴极子电极层之间夹层往返的蛇形结构。
根据权利要求 1所述的一种高亮度主动发光显示器， 其特征在于： 所 述的基板为透明基板。
根据权利要求 1所述的一种高亮度主动发光显示器， 其特征在于： 所 述的基板与像素主体之间设有绝缘层， 在绝缘层中与各像素主体对应 位置设有用于驱动像素主体的 TFT驱动电路。
根据权利要求 1所述的一种高亮度主动发光显示器， 其特征在于： 所 述的发光材料层与阴极子电极层之间还包含电子注入层、 电子传输层 、 空穴阻挡层中的其中一层， 或两层以上的组合； 发光材料层与阳极 子电极层之间还包含空穴注入层、 空穴传输层及电子阻挡层中的其中 一层， 或两层以上的组合。
根据权利要求 1所述的一种高亮度主动发光显示器， 其特征在于： 所 述的发光材料层采用小分子发光材料或者高分子聚合物发光材料或者 是两者的混合物。
PCT/CN2016/108318 2016-08-10 2016-12-02 一种高亮度oled显示器 WO2018028098A1 (zh)

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