WO2020237875A1 - 一种显示面板及其制备方法 - Google Patents

一种显示面板及其制备方法 Download PDF

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WO2020237875A1
WO2020237875A1 PCT/CN2019/103158 CN2019103158W WO2020237875A1 WO 2020237875 A1 WO2020237875 A1 WO 2020237875A1 CN 2019103158 W CN2019103158 W CN 2019103158W WO 2020237875 A1 WO2020237875 A1 WO 2020237875A1
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layer
light
display panel
color resistance
preparing
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PCT/CN2019/103158
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English (en)
French (fr)
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何昆鹏
唐甲
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深圳市华星光电半导体显示技术有限公司
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Priority to US16/612,399 priority Critical patent/US11094752B2/en
Publication of WO2020237875A1 publication Critical patent/WO2020237875A1/zh

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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/80Constructional details
    • H10K50/86Arrangements 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
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • 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 invention relates to the field of display technology, in particular to a display panel and a preparation method thereof.
  • OLED Organic Light-Emitting Diode
  • OLED organic electric laser display device
  • organic light emitting semiconductor organic light emitting semiconductor
  • the basic structure of OLED is a thin, transparent, semi-conducting indium tin oxide (ITO) connected to the positive electrode of electricity, plus another metal-faced cathode, wrapped in a sandwich structure.
  • ITO indium tin oxide
  • the entire structure layer includes: hole transport layer (HTL), light emitting layer (EL) and electron transport layer (ETL).
  • HTL hole transport layer
  • EL light emitting layer
  • ETL electron transport layer
  • the positive electrode holes and the surface cathode charges When the power is supplied to the appropriate voltage, the positive electrode holes and the surface cathode charges will combine in the light-emitting layer, and under the action of the Coulomb force, they will recombine with a certain probability to form excitons (electron-hole pairs) in an excited state.
  • the excited state is unstable in the normal environment.
  • the excitons in the excited state recombine and transfer energy to the luminescent material, making it transition from the ground state energy level to the excited state.
  • the excited state energy generates photons through the radiation relaxation process and releases light It can produce light, and the three primary colors of red, green and blue are produced according to different formulas, which constitute the basic colors.
  • OLED the characteristic of OLED is that it emits light by itself, unlike the thin film transistor liquid crystal display device (English full name: Thin The film transistor-liquid crystal display (TFT-LCD for short) needs backlight, so the visibility and brightness are high.
  • OLED has the advantages of low voltage demand, high power saving efficiency, fast response, light weight, thin thickness, simple structure, low cost, wide viewing angle, almost infinitely high contrast, low power consumption, and extremely high response speed. It has become One of the most important display technologies today is gradually replacing TFT-LCD is expected to become the next-generation mainstream display technology after LCD.
  • OLED organic light-emitting diode
  • COA full English name: color filter on array
  • the light of the OLED device often loses more brightness after being filtered by the color filter, which will affect the display quality of the display to a certain extent, increase the power consumption of the OLED device, and accelerate the aging of the device. Therefore, a new type of display panel is needed to solve the above-mentioned problems.
  • An object of the present invention is to provide a display panel and a preparation method thereof, which can solve the problem that the color filter existing in the existing display panel will lose the brightness of light, which in turn causes the OLED device to consume large amounts of power and cause the device to age quickly. Wait for the question.
  • one embodiment of the present invention provides a display panel, which includes a base layer, a passivation layer, a color resist unit, a flat layer, an anode, a pixel definition layer, a light-emitting layer, and a cathode.
  • the passivation layer is disposed on the base layer; the color resist units are disposed on the passivation layer at intervals; the flat layer is disposed on the color resist units; the anode corresponds to the color resist
  • the unit is arranged on the flat layer; the pixel defining layer is arranged on the flat layer between the adjacent anodes; the light-emitting layer is arranged on the anode; the cathode is arranged on the light-emitting layer Wherein at least one of the color resistance unit partially covers the projection of the light-emitting layer on the color resistance unit.
  • constituent material of the passivation layer is SiO2.
  • composition material of the flat layer and the pixel definition layer is an organic photoresist material.
  • constituent material of the pixel definition layer is an organic photoresist material
  • the constituent material of the anode includes one or more of indium tin oxide and indium zinc oxide.
  • constituent materials of the cathode include one or more of aluminum, silver, and copper.
  • Another embodiment of the present invention also provides a method for preparing the display panel of the present invention, which includes the following steps:
  • Step S1 providing a base layer
  • Step S2 preparing a passivation layer on the base layer
  • Step S3 preparing color resist units on the passivation layer at intervals
  • Step S4 preparing a flat layer on the color resistance unit
  • Step S5 preparing an anode corresponding to the color resistance unit on the flat layer
  • Step S6 preparing a pixel definition layer on the flat layer between adjacent anodes
  • Step S7 preparing a light-emitting layer on the anode layer
  • Step S8 preparing a cathode on the light-emitting layer
  • At least one of the color resistance units partially covers the projection of the light-emitting layer on the color resistance unit.
  • the flat layer in step S4 is prepared by yellow light process technology.
  • the pixel definition layer in step S6 is prepared by yellow light process technology.
  • the preparation method of the light-emitting layer in step S7 includes one of vapor deposition and inkjet printing.
  • the present invention relates to a display panel and a preparation method thereof.
  • the present invention realizes the light emitted by the light-emitting layer by partially covering the projection of the light-emitting layer on the color-resist unit by at least one color resistance unit. Part of the chromaticity gamut is adjusted by the color resistance unit, and the brightness of some unadjusted light will not be lost.
  • the display panel can adjust the chromaticity gamut of the display screen and the display brightness caused by the use of the color resistance unit. The missing question.
  • FIG. 1 is a schematic diagram of the structure of the display panel of the present invention.
  • FIG. 2 is a schematic diagram 1 of the preparation structure of the display panel of the present invention.
  • FIG. 3 is a second schematic diagram of the preparation structure of the display panel of the present invention.
  • FIG. 4 is the third schematic diagram of the preparation structure of the display panel of the present invention.
  • the component can be directly placed on the other component; there may also be an intermediate component on which the component is placed , And the intermediate component is placed on another component.
  • a component is described as “installed to” or “connected to” another component, both can be understood as directly “installed” or “connected”, or a component is “installed to” or “connected to” through an intermediate component Another component.
  • a display panel 100 includes: a base layer 1, a passivation layer 2, a color resist unit 3, a flat layer 4, an anode 5, a pixel definition layer 6, a light emitting layer 7 and a cathode 8.
  • the passivation layer 2 is arranged on the base layer 1; the color resist units 3 are arranged on the passivation layer 2 at intervals; the flat layer 4 is arranged on the color resist units 3;
  • the anode 5 is provided on the flat layer 4 corresponding to the color resistance unit 3;
  • the pixel definition layer 6 is provided on the flat layer 4 between the adjacent anodes 5;
  • the light-emitting layer 7 is provided on the On the anode 5;
  • the cathode 8 is arranged on the light-emitting layer 7, and at least one of the color resist units 3 partially covers the projection of the light-emitting layer 7 on the color resist unit 3.
  • the display panel 100 has the problems of adjusting the chromaticity gamut of the display screen and the lack of display brightness caused by the use of color resist units.
  • the constituent material of the passivation layer 2 is SiO2.
  • the passivation layer 2 thus produced is more flexible and can increase the bending performance of the display panel 100.
  • the constituent materials of the flat layer 4 and the pixel definition layer 6 are organic photoresist materials.
  • the constituent material of the anode 5 includes one or more of indium tin oxide and indium zinc oxide.
  • the anode 5 made in this way has good light transmission performance and can increase the luminous efficiency of the display panel 100.
  • the constituent materials of the cathode 8 include one or more of aluminum, silver, and copper.
  • the cathode 8 thus manufactured has good reflection performance, and can effectively emit the light emitted from the light-emitting layer 7 to the anode 5, thereby improving the luminous efficiency of the display panel 100.
  • another embodiment of the present invention also provides a method for preparing the display panel 100 involved in the present invention, including the following steps: step S1, providing a base layer 1; step S2, The base layer 1 prepares a passivation layer 2.
  • the manufacturing method of the display panel 100 further includes: step S3, preparing color resist units on the passivation layer at intervals.
  • the manufacturing method of the display panel 100 further includes: step S4, preparing a flat layer 4 on the color resist unit 3; and step S5, corresponding to the color resist unit on the flat layer 4 3 Prepare the anode 5; wherein at least one of the color resist units 3 partially covers the projection of the light-emitting layer 7 on the color resist unit 3; step S6, prepare pixels on the flat layer between the adjacent anodes 5 Define the layer.
  • the method for preparing the display panel 100 further includes: step S7, preparing a light-emitting layer 7 on the anode layer 5; and step S8, preparing a cathode 8 on the light-emitting layer 7, thereby forming a 1 shown in the display panel 100.
  • the flat layer 4 in the step S4 and the pixel definition layer 6 in the step S6 can be prepared by yellow light process technology.
  • the preparation method of the light-emitting layer 7 in step S7 includes one of vapor deposition and inkjet printing.
  • part of the light emitted from the light-emitting layer 7 in the display panel 100 prepared by the above method passes through the color resist unit 3 to adjust the chromaticity gamut, and part does not pass through the color resist unit 3, and this part is not adjusted.
  • the brightness of the light will not be lost, and finally the display panel 100 has both the problem of adjusting the chromaticity gamut of the display screen and the lack of display brightness caused by the use of color resist units.

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

Abstract

一种显示面板(100)及其制备方法,其中所述显示面板(100)包括:基底层(1)、钝化层(2)、色阻单元(3)、平坦层(4)、阳极(5)、像素定义层(6)、发光层(7)以及阴极(8)。通过将至少一个所述色阻单元(3)部分覆盖所述发光层(7)在所述色阻单元(3)上的投影,以此实现所述发光层(7)发射出来的光线部分经过所述色阻单元(3)进行色度域的调整,部分未经过调整的光线的亮度不会被损失,最终使所述显示面板(100)同时具备调整显示屏色度域和使用色阻单元(3)导致的显示亮度缺失的问题。

Description

一种显示面板及其制备方法 技术领域
本发明涉及显示技术领域,具体涉及一种显示面板及其制备方法。
背景技术
OLED(英文全称:Organic Light-Emitting Diode, 简称OLED)器件又称为有机电激光显示装置、有机发光半导体。OLED的基本结构是由一薄而透明具有半导体特性的铟锡氧化物(ITO)与电力之正极相连,再加上另一个金属面阴极,包成如三明治的结构。整个结构层中包括了:空穴传输层(HTL)、发光层(EL)与电子传输层(ETL)。当电力供应至适当电压时,正极空穴与面阴极电荷就会在发光层中结合,在库伦力的作用下以一定几率复合形成处于激发态的激子(电子-空穴对),而此激发态在通常的环境中是不稳定的,激发态的激子复合并将能量传递给发光材料,使其从基态能级跃迁为激发态,激发态能量通过辐射驰豫过程产生光子,释放出光能,产生光亮,依其配方不同产生红、绿和蓝RGB三基色,构成基本色彩。
首先OLED的特性是自己发光,不像薄膜晶体管液晶显示装置(英文全称:Thin film transistor-liquid crystal display,简称TFT-LCD)需要背光,因此可视度和亮度均高。其次OLED具有电压需求低、省电效率高、反应快、重量轻、厚度薄,构造简单,成本低、广视角、几乎无穷高的对比度、较低耗电、极高反应速度等优点,已经成为当今最重要的显示技术之一,正在逐步替代 TFT-LCD,有望成为继LCD之后的下一代主流显示技术。
技术问题
随着OLED技术的发展,现在大体上分为两大类别:蒸镀OLED和打印OLED。在制作发射R/G/B三元色光的OLED器件时,由于材料和工艺的限制,通常会出现OLED发射光谱与客户所需的光谱有所差异,这时我们通常会增加COA(英文全称:color filter on array)结构的彩膜来过滤OLED发射的光,以达到调整显示屏色度域的目的。但是OLED器件的光在经过彩色滤光片滤色后往往会损失较多的亮度,这会一定程度上影响显示屏的显示品质、增大OLED器件功耗、加速器件老化。因此需要寻求一种新型的显示面板以解决上述问题。
技术解决方案
本发明的一个目的是提供一种显示面板及其制备方法,其能够解决现有的显示面板中存在的彩色滤光片会损失光线的亮度,进而引起的OLED器件功耗大、器件老化起速度快等问题。
为了解决上述问题,本发明的一个实施方式提供了一种显示面板,其中包括:基底层、钝化层、色阻单元、平坦层、阳极、像素定义层、发光层以及阴极。其中所述钝化层设置于所述基底层上; 所述色阻单元间隔设置于所述钝化层上;所述平坦层设置于所述色阻单元上;所述阳极对应所述色阻单元设置于所述平坦层上;所述像素定义层设置于所述相邻阳极之间所述平坦层上;所述发光层设置于所述阳极上;所述阴极设置于所述发光层上;其中至少一个所述色阻单元部分覆盖所述发光层在所述色阻单元上的投影。
进一步的,其中所述钝化层的组成材料为SiO2。
进一步的,其中所述平坦层和像素定义层的组成材料为有机光阻材料。
进一步的,其中所述像素定义层的组成材料为有机光阻材料
进一步的,其中所述阳极的组成材料包括氧化铟锡、氧化铟锌中的一种或多种。
进一步的,其中所述阴极的组成材料包括铝、银、铜中的一种或多种。
本发明的另一个实施方式还提供了一种制备本发明所涉及的显示面板的制备方法,其中包括以下步骤:
步骤S1,提供一基底层;
步骤S2,在所述基底层制备钝化层;
步骤S3,在所述钝化层上间隔制备色阻单元;
步骤S4,在所述色阻单元上制备平坦层;以及
步骤S5,在所述平坦层上对应所述色阻单元制备阳极;
步骤S6,在相邻所述阳极之间的平坦层上制备像素定义层;
步骤S7,在所述阳极层上制备发光层;以及
步骤S8,在所述发光层上制备阴极;
其中至少一个所述色阻单元部分覆盖所述发光层在所述色阻单元上的投影。
进一步的,其中所述步骤S4中的平坦层通过黄光制程技术制备。
进一步的,其中所述步骤S6中的像素定义层通过黄光制程技术制备。
进一步的,其中所述步骤S7中的发光层的制备方式包括蒸镀、喷墨打印中的一种。
有益效果
本发明涉及一种显示面板及其制备方法,本发明通过将至少一个所述色阻单元部分覆盖所述发光层在所述色阻单元上的投影,以此实现所述发光层发射出来的光线部分经过所述色阻单元进行色度域的调整,部分未经过调整的光线的亮度不会被损失,最终使所述显示面板同时具备调整显示屏色度域和使用色阻单元导致的显示亮度缺失的问题。
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是本发明显示面板的结构示意图。
图2是本发明显示面板的制备结构示意图一。
图3是本发明显示面板的制备结构示意图二。
图4是本发明显示面板的制备结构示意图三。
图中部件标识如下:
100、显示面板
1、基底层                     2、钝化层
3、色阻单元                   4、平坦层
5、阳极                       6、像素定义层
7、发光层                     8、阴极
本发明的实施方式
以下结合说明书附图详细说明本发明的优选实施例,以向本领域中的技术人员完整介绍本发明的技术内容,以举例证明本发明可以实施,使得本发明公开的技术内容更加清楚,使得本领域的技术人员更容易理解如何实施本发明。然而本发明可以通过许多不同形式的实施例来得以体现,本发明的保护范围并非仅限于文中提到的实施例,下文实施例的说明并非用来限制本发明的范围。
本发明所提到的方向用语,例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等,仅是附图中的方向,本文所使用的方向用语是用来解释和说明本发明,而不是用来限定本发明的保护范围。
在附图中,结构相同的部件以相同数字标号表示,各处结构或功能相似的组件以相似数字标号表示。此外,为了便于理解和描述,附图所示的每一组件的尺寸和厚度是任意示出的 ,本发明并没有限定每个组件的尺寸和厚度。
当某些组件,被描述为“在”另一组件“上”时,所述组件可以直接置于所述另一组件上;也可以存在一中间组件,所述组件置于所述中间组件上,且所述中间组件置于另一组件上。当一个组件被描述为“安装至”或“连接至”另一组件时,二者可以理解为直接“安装”或“连接”,或者一个组件通过一中间组件“安装至”或“连接至”另一个组件。
实施例1
如图1所示,一种显示面板100,其中包括:基底层1、钝化层2、色阻单元3、平坦层4、阳极5、像素定义层6、发光层7以及阴极8。其中所述钝化层2设置于所述基底层1上; 所述色阻单元3间隔设置于所述钝化层2上;所述平坦层4设置于所述色阻单元3上;所述阳极5对应所述色阻单元3设置于所述平坦层4上;所述像素定义层6设置于所述相邻阳极5之间所述平坦层4上;所述发光层7设置于所述阳极5上;所述阴极8设置于所述发光层7上,至少一个所述色阻单元3部分覆盖所述发光层7在所述色阻单元3上的投影。以此实现所述发光层7发射出来的光线部分经过所述色阻单元3进行色度域的调整,部分不经过所述色阻单元3,以此部分未经过调整的光线的亮度不会被损失,最终使所述显示面板100同时具备调整显示屏色度域和使用色阻单元导致的显示亮度缺失的问题。
具体的,其中所述钝化层2的组成材料为SiO2。由此制成的钝化层2柔性较好,可以增加显示面板100的弯折性能。
具体的,其中所述平坦层4和像素定义层6的组成材料为有机光阻材料。
进一步的,其中所述阳极5的组成材料包括氧化铟锡、氧化铟锌中的一种或多种。由此制成的阳极5光透过性能好,可以调高显示面板100的发光效率。
进一步的,其中所述阴极8的组成材料包括铝、银、铜中的一种或多种。由此制成的阴极8反射性能好,可以很好的将所述发光层7发射的光线发射至阳极5发射出来,提高了显示面板100的发光效率。
如图2所示,本发明的另一个实施方式还提供了一种制备本发明所涉及的显示面板100的制备方法,包括以下步骤:步骤S1,提供一基底层1;步骤S2,在所述基底层1制备钝化层2。
如图3所示,所述显示面板100的制备方法还包括:步骤S3,在所述钝化层上间隔制备色阻单元。
如图4所示,所述显示面板100的制备方法还包括:步骤S4,在所述色阻单元3上制备平坦层4;以及步骤S5,在所述平坦层4上对应所述色阻单元3制备阳极5;其中至少一个所述色阻单元3部分覆盖所述发光层7在所述色阻单元3上的投影;步骤S6,在相邻所述阳极5之间的平坦层上制备像素定义层。
进一步的,其中所述显示面板100的制备方法还包括:步骤S7,在所述阳极层5上制备发光层7;以及步骤S8,在所述发光层7上制备阴极8,以此形成如图1所示的显示面板100。
进一步的,其中所述步骤S4中的平坦层4以及步骤S6中的像素定义层6可以通过黄光制程技术制备。
进一步的,其中所述步骤S7中的发光层7的制备方式包括蒸镀、喷墨打印中的一种。
综上,通过上述方法制备的显示面板100中发光层7发射出来的光线部分经过所述色阻单元3进行色度域的调整,部分不经过所述色阻单元3,以此部分未经过调整的光线的亮度不会被损失,最终使所述显示面板100同时具备调整显示屏色度域和使用色阻单元导致的显示亮度缺失的问题。
以上对本发明所提供的显示面板及其制备方法进行了详细介绍。应理解,本文所述的示例性实施方式应仅被认为是描述性的,用于帮助理解本发明的方法及其核心思想,而并不用于限制本发明。在每个示例性实施方式中对特征或方面的描述通常应被视作适用于其他示例性实施例中的类似特征或方面。尽管参考示例性实施例描述了本发明,但可建议所属领域的技术人员进行各种变化和更改。本发明意图涵盖所附权利要求书的范围内的这些变化和更改,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种显示面板,其包括:
    基底层;
    钝化层,所述钝化层设置于所述基底层上;
    色阻单元,所述色阻单元间隔设置于所述钝化层上;
    平坦层,所述平坦层设置于所述色阻单元上;以及
    阳极,所述阳极对应所述色阻单元设置于所述平坦层上;
    像素定义层,所述像素定义层设置于所述相邻阳极之间所述平坦层上;
    发光层,所述发光层设置于所述阳极上;以及
    阴极,所述阴极设置于所述发光层上;
    其中至少一个所述色阻单元部分覆盖所述发光层在所述色阻单元上的投影。
  2. 根据权利要求1所述的显示面板,其中所述钝化层的组成材料为SiO2。
  3. 根据权利要求1所述的显示面板,其中所述平坦层的组成材料为有机光阻材料。
  4. 根据权利要求1所述的显示面板,其中所述像素定义层的组成材料为有机光阻材料。
  5. 根据权利要求1所述的显示面板,其中所述阳极的组成材料包括氧化铟锡、氧化铟锌中的一种或多种。
  6. 根据权利要求1所述的显示面板,其中所述阴极的组成材料包括铝、银、铜中的一种或多种。
  7. 一种制备权利要求1所述的显示面板的制备方法,其中包括以下步骤:
    步骤S1,提供一基底层;
    步骤S2,在所述基底层制备钝化层;
    步骤S3,在所述钝化层上间隔制备色阻单元;
    步骤S4,在所述色阻单元上制备平坦层;以及
    步骤S5,在所述平坦层上对应所述色阻单元制备阳极;
    步骤S6,在相邻所述阳极之间的平坦层上制备像素定义层;
    步骤S7,在所述阳极层上制备发光层;以及
    步骤S8,在所述发光层上制备阴极;
    其中至少一个所述色阻单元部分覆盖所述发光层在所述色阻单元上的投影。
  8. 根据权利要求7所述的显示面板的制备方法,其中所述步骤S4中的平坦层通过黄光制程技术制备。
  9. 根据权利要求7所述的显示面板的制备方法,其中所述步骤S6中的像素定义层通过黄光制程技术制备。
  10. 根据权利要求7所述的显示面板的制备方法,其中所述步骤S7中的发光层的制备方式包括蒸镀、喷墨打印中的一种。
PCT/CN2019/103158 2019-05-24 2019-08-29 一种显示面板及其制备方法 WO2020237875A1 (zh)

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