μ-LEDs, μ-LED array structures, displays and related methods

JP7600120B2Active Publication Date: 2024-12-16AMS OSRAM INT GMBH
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Patent Information

Application Number
JP2021544242
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2019-11-21
Filing Date
2020-01-29
Publication Date
2024-12-16
Estimated Expiration
2040-01-29

AI Technical Summary

Technical Problem

The manufacturing of μ-LEDs with small pixel sizes presents challenges due to their difficult fabrication and integration into displays, leading to issues such as the screen door effect and reduced radiative recombination efficiency, which affect brightness and resolution in augmented reality and automotive applications.

Method used

The development of μ-LED arrays with slotted antenna structures and optimized manufacturing processes, including quantum well intermixing and controlled doping, to enhance radiative recombination and reduce non-radiative losses, combined with monolithic and hybrid display configurations to achieve high pixel density and color accuracy.

Benefits of technology

This approach improves the brightness, resolution, and longevity of μ-LED displays by enhancing radiative recombination and reducing defects, making them suitable for high-resolution augmented reality and automotive applications.

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Abstract

The present invention relates to various aspects of μ-LEDs or μ-LED arrangements for augmented reality or optical applications, here in particular for the automotive sector. Among other things, μ-LEDs are characterized by very small dimensions of a few μm.
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