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Pixel unit, manufacturing method thereof and display device

一种像素单元、像素定义的技术

Active Publication Date: 2014-08-20
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of low light extraction efficiency of the OLED backplane, the present invention proposes a pixel unit, a manufacturing method thereof, and a display device to improve the light extraction efficiency

Method used

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  • Pixel unit, manufacturing method thereof and display device
  • Pixel unit, manufacturing method thereof and display device
  • Pixel unit, manufacturing method thereof and display device

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] The present invention aims at the effect of the structure of the pixel definition layer in the prior art on the extraction efficiency of side light. The light reflected by the anode travels through a longer optical path in the pixel definition layer, absorbs more energy by the material, and the light is defined by the pixel. Total reflection occurs when the layer structure exits, which leads to the loss of outgoing light. A pixel unit and its manufacturing method and display device are provided, which can shorten the optical path of light in the pixel defining layer, reduce light absorption, and prevent total reflection. , improve the light extraction efficiency of the OLED device, and then improve the external quan...

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PUM

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Abstract

The invention discloses a pixel unit, a manufacturing method thereof and a display device. The pixel unit comprises an anode layer, a pixel definition layer, an organic light-emitting layer and a cathode layer. The anode layer comprises a plurality of pixel anodes distributed in an array mode. The pixel definition layer is located on the anode layer and comprises a plurality of pixel definition units arranged at an interval. The pixel definition units correspond to the pixel anodes in a one-to-one mode. Each pixel definition unit defines a light-emitting area on the corresponding pixel anode. The organic light-emitting layer is located in the light-emitting areas, and the cathode layer is located on the organic light-emitting layer. By improving the structure of the pixel unit, the light extraction efficiency is greatly improved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel unit and a manufacturing method thereof. Background technique [0002] The basic structure of organic electroluminescence (Organic Light-Emitting Diode, OLED) device is a thin and transparent indium tin oxide (ITO) with semiconducting properties, connected to the positive electrode of electricity, plus another metal cathode, including into a sandwich structure. The whole structural layer includes: hole transport layer (HTL), light emitting layer (EL) and electron transport layer (ETL). When the power is supplied to an appropriate voltage, the positive holes and the negative charges will combine in the light-emitting layer to produce light, and the three primary colors of red, green and blue RGB will be produced according to their formulas to form the basic colors. [0003] In general, the external quantum efficiency of an OLED depends on its internal quantum ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32
CPCH10K59/10H10K59/122H10K71/621H10K50/813H10K50/818H10K50/822H10K71/00H10K50/81
Inventor 石磊皇甫鲁江许晓伟
Owner BOE TECH GRP CO LTD
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