Display panel and display device

By setting up stacked low-efficiency light-emitting units in the display panel and adjusting the conductivity of the charge generation layer, the color crosstalk problem in stacked OLED devices is solved, improving display effect and uniformity.

CN122318581APending Publication Date: 2026-06-30WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202411975065.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The high lateral conductivity of the common layer in stacked OLED devices leads to severe pixel color crosstalk, affecting the display effect.

Method used

A first sub-pixel and a second sub-pixel are set in the display panel. The second sub-pixel includes stacked second and third light-emitting units with the same light-emitting color but lower efficiency than the first sub-pixel. By adjusting the lateral conductivity of the charge generation layer and the thickness and refractive index of the cover layer, the charge injection path is controlled to reduce crosstalk.

Benefits of technology

It effectively reduces color crosstalk in stacked OLED devices, improves the image quality and uniformity of the display panel, and avoids the problem of excessive power consumption.

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Abstract

This application provides a display panel and a display device. The display panel includes a first sub-pixel and a second sub-pixel. The first sub-pixel includes a first light-emitting unit. The second sub-pixel includes a second light-emitting unit and a third light-emitting unit stacked together. The light emission color of the second light-emitting unit is the same as that of the third light-emitting unit, and the light emission color of the second light-emitting unit is different from that of the first light-emitting unit. The luminous efficiency of the second light-emitting unit and / or the third light-emitting unit is lower than that of the first light-emitting unit. By adjusting the number of light-emitting units, the crosstalk problem caused by the high lateral conductivity of the common layer in the stacked light-emitting devices in the related art is reduced, thereby improving the image quality of the display panel.
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