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Sony patents display layer design to boost pixel reliability

Sony describes a display structure where a specific connection point links two parts of the pixel's electrical circuit along the side of a protective layer. This design aims to improve the long-term stability of the light-emitting components in screens.

Why it mattersThis is a technical improvement to screen durability that could lead to more reliable displays in future devices, though it is not a new feature for consumers.

In the filing’s own words

Provided are a display device and an electronic apparatus capable of improving the reliability of a light emission state of a pixel. A display device includes: a plurality of sub-pixels; a plurality of light emitting elements including an anode electrode, an organic layer, and a first cathode electrode, the anode electrode, the organic layer, and the first cathode electrode being separated into each of the plurality of sub-pixels; an element protective layer covering the first cathode electrode; a second cathode electrode provided on the element protective layer; and a connection portion that electrically connects the second cathode electrode and the first cathode electrode, in which the connection portion is formed along a side wall of the element protective layer.

What exactly they claim (claim 1)

1. A display device comprising: a plurality of sub-pixels; a plurality of light emitting elements including an anode electrode, an organic layer, and a first cathode electrode, the anode electrode, the organic layer, and the first cathode electrode being separated into each of the plurality of sub-pixels; an element protective layer covering the first cathode electrode; a second cathode electrode provided on the element protective layer; and a connection portion that electrically connects the second cathode electrode and the first cathode electrode, wherein the connection portion is formed along a side wall of the element protective layer, the connection portion is provided so as to individually surround a periphery of each of light emitting regions of the plurality of light emitting elements, an inner portion of the connection portion has a refractive index different from a refractive index of the element protective layer, the connection portion includes a via, and the via is one of a plurality of vias arranged in a via column.

Facts

Company
Sony (Sony Semiconductor Solutions Corporation)
Official title
Display device and electronic apparatus
Patent number
US12750929B2
Application number
18553091
Filed
Mar 31, 2022
Granted
Sep 29, 2026
Inventors
9
Claims
18

Classified under

H05B 33/06 Electricity & electronicsH10K 59/131 Electricity & electronicsH10K 59/80521 Electricity & electronicsH10K 59/80523 Electricity & electronicsH10K 59/80524 Electricity & electronicsH10K 59/82 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.