Indication device

The use of photolithography and sacrificial layers to form island-shaped units with side walls addresses manufacturing challenges, enabling high-definition, high-resolution, and multifunctional displays with improved reliability and reduced costs.

JP7864108B2Active Publication Date: 2026-05-22SEMICON ENERGY LAB CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SEMICON ENERGY LAB CO LTD
Filing Date
2022-02-07
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Existing display devices face challenges in achieving high-definition, high-resolution, large-sized, and multifunctional displays due to issues with manufacturing methods like vacuum evaporation using metal masks, which result in low yield, high cost, and potential for crosstalk and thickness variations in light-emitting layers.

Method used

A method involving photolithography and sacrificial layers to form island-shaped light-emitting and light-receiving units, with side walls to prevent short circuits and uniform layer thickness, allowing for high-resolution and high-aperture ratio displays.

Benefits of technology

Enables the production of high-definition, high-resolution, large-sized, and multifunctional displays with improved reliability and reduced manufacturing costs, while minimizing damage to light-emitting and light-receiving units.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a high-definition or high-resolution display device. A display device having a plurality of light-emitting elements, a light-receiving element, a coloring layer, and a first side wall. The light-emitting element has a first pixel electrode, a first light-emitting layer on the first pixel electrode, an intermediate layer on the first light-emitting layer, and a common electrode on a second light-emitting layer on the first intermediate layer. The first pixel electrode, the first light-emitting layer, the intermediate layer, and the second light-emitting layer are provided separately for each light-emitting element. The coloring layer is provided so as to have a region overlapping the light-emitting element. The light-receiving element has a second pixel electrode, a light-receiving layer on the second pixel electrode, and a common electrode on the light-receiving layer. The first side wall is provided so as to cover at least a part of a side surface of the first pixel electrode, a side surface of the first light-emitting layer, a side surface of the first intermediate layer, and a side surface of the second light-emitting layer. A second side wall is provided so as to cover at least a part of a side surface of the second pixel electrode and a side surface of the light-receiving layer.
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