Anode structure and its preparation method, display device

By designing a multi-layer structure on the anode reflective layer of the top-emitting OLED device, forming surface regions with different roughness and/or uneven surface structures, the problems of low light extraction efficiency and microcavity effect are solved, thereby widening the viewing angle and improving the light extraction efficiency.

CN115666152BActive Publication Date: 2026-07-17GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
Filing Date
2021-10-21
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing top-emitting OLED devices have low light extraction efficiency and suffer from microcavity effects, resulting in a small viewing angle and reduced light extraction efficiency.

Method used

The anode reflective layer employs a multi-layer structure, including first and second sub-reflective layers. By forming multiple surface regions with different roughness and/or uneven surface structures on the surface of the anode reflective layer away from the first conductive dielectric layer, a small height difference is formed using sub-reflective layers of different materials and thicknesses, thereby widening the light emission direction of the reflected light and reducing the microcavity effect.

Benefits of technology

It effectively improves the viewing angle of top-emitting display devices, increases light extraction efficiency, and solves the problem of low light extraction efficiency.

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Abstract

This invention relates to an anode structure, its fabrication method, and a display device. The anode structure includes: a first conductive dielectric layer; an anode reflective layer disposed on the first conductive dielectric layer, wherein the surface of the anode reflective layer away from the first conductive dielectric layer has multiple surface regions with varying roughness and / or an uneven surface structure; and a second conductive dielectric layer disposed on the surface of the anode reflective layer away from the first conductive dielectric layer. The anode structure of this invention can broaden the light emission direction of reflected light, reduce the microcavity effect of top-emitting display devices, improve the viewing angle, and increase light extraction efficiency. The fabrication method of the anode structure of this invention is simple and easy to implement. The display device of this invention has high light extraction efficiency and a wide viewing angle.
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