Display device

JPWO2023073477A5Pending Publication Date: 2025-10-22
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Patent Information

Application Number
JP2023555865
Authority / Receiving Office
JP · JP
Patent Type
Applications
Priority Date
2021-10-27
Filing Date
2022-10-14
Publication Date
2025-10-22

AI Technical Summary

Technical Problem

Current display devices face challenges in achieving high-definition, high-resolution, and reliable performance due to leakage current issues between subpixels, particularly as they become more precise and have higher aperture ratios, leading to deterioration in display quality and low manufacturing yield.

Method used

The implementation of an island-shaped electroluminescent (EL) layer for each light-emitting device, with sidewall insulating layers to prevent contact between pixel electrodes and common electrodes, allowing for independent operation of subpixels and reducing crosstalk, while eliminating the need for fine metal masks, thus enabling closer subpixel spacing and higher aperture ratios.

Benefits of technology

This configuration enhances color reproducibility, contrast, and reliability of the display device, achieving high-definition and high-resolution displays with improved manufacturing yield by minimizing leakage current and short-circuit risks, and allowing for aperture ratios close to 100%.

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Abstract

The present invention provides a high-definition display device. The present invention has a first light emission device and a second light emission device on an insulating surface. A first side wall insulation layer is in contact with the side surface of a first pixel electrode provided to the first light emission device, and a second side wall insulation layer is in contact with the side surface of a second pixel electrode provided to the second light emission device. The first light emission device overlaps with a first coloring layer, and the second light emission device overlaps with a second coloring layer that transmits light of a different color to that transmitted by the first coloring layer. The first light emission device and the second light emission device have a common electrode. A first layer provided to the first light emission device, a second layer provided to the second light emission device, and a material layer that is positioned on the upper surface of an insulation layer and positioned between the first side wall insulation layer and the second side wall insulation layer have the same light emission material and are set away from each other.
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