Transparent OLED light-emitting device and display panel

By setting an electrode cover layer in a transparent OLED device to control the interference of reflected light, the brightness and privacy issues of transparent OLED display devices are solved, and a transparent OLED display panel with high transmittance and high pixel density is realized.

CN122341024APending Publication Date: 2026-07-03HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Filing Date
2026-03-17
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing transparent OLED display devices cannot simultaneously achieve high transmittance, high pixel density, and good privacy. Furthermore, common transparent OLED light-emitting devices suffer from brightness and privacy issues due to light emanating from both sides.

Method used

The device employs a first transparent electrode, a light-emitting unit, a second transparent electrode, and an electrode cover layer (CPL) arranged from bottom to top. By adjusting the thickness and refractive index of the electrode cover layer, the interference gain of the reflected light can be controlled or weakened, thereby achieving the regulation of double-sided or single-sided light emission.

Benefits of technology

It improves the brightness of the observation surface and enhances display privacy at high pixel density, simplifies optical structure calculations, and reduces engineering errors.

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Abstract

This application belongs to the field of organic optoelectronics technology, specifically disclosing a transparent OLED light-emitting device and display panel. The light-emitting unit generates visible light by applying voltage to a first transparent electrode and a second transparent electrode. The electrode capping layer material, by adjusting its thickness and refractive index, causes interference reduction or increase in the reflected light from the second transparent electrode side, thereby adjusting the ratio of the luminous brightness of the second transparent electrode side to the luminous brightness of the first transparent electrode side, achieving double-sided light emission or enhanced single-sided light emission. The OLED light-emitting device provided by this application features high transparency, high brightness, and high display privacy.
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