Display device, display module, and electronic device

JPWO2022200916A5Active Publication Date: 2025-03-21SEMICON ENERGY LAB CO LTD
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Patent Information

Application Number
JP2023508138
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-03-25
Filing Date
2022-03-15
Publication Date
2025-03-21
Estimated Expiration
2042-03-15

AI Technical Summary

Technical Problem

Current display technologies face challenges in achieving high definition and high aperture ratio while maintaining reliability and low power consumption, particularly due to issues with dust and misalignment during the formation of EL layers using metal masks, which can lead to pattern defects and short circuits.

Method used

A method for forming EL layers without a shadow mask, using a sacrificial layer and protective layers to create separate EL layers with precise control over their positioning and spacing, allowing for high-definition and high-aperture-ratio displays without the need for special pixel arrangements.

Benefits of technology

This approach enables the production of highly reliable, high-definition display devices with low power consumption and high contrast, achieving aperture ratios close to 100% and resolutions exceeding 5000 ppi without the limitations of traditional metal mask methods.

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Abstract

The present invention provides a display device having high display quality and reliability. This display device comprises: a first light-emitting element; a second light-emitting element disposed so as to be adjacent to the first light-emitting element; a first protective layer; a second protective layer; and an insulating layer. The first light-emitting element has a first pixel electrode, a first EL layer, a light-emitting layer, and a common electrode. The second light-receiving element has a second pixel electrode, a second EL layer, and the common electrode. The first EL layer is provided on the first pixel electrode, and the second EL layer is provided on the second pixel electrode. The first protective layer has a region that contacts a side surface of the first EL layer, and the second protective layer has a region that contacts a side surface of the second EL layer. The insulating layer is provided between the first protective layer and the second protective layer. The common electrode is provided on the first EL layer, on the second EL layer, on the first protective layer, on the second protective layer, and on the insulating layer.
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