Micro-LED Recess Structure for Higher Luminance Displays
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Solution Overview
Problem
Large micro-LED displays face challenges in quickly and accurately transferring millions of micro-LEDs to a display panel, and they suffer from low luminance due to the small size of micro-LEDs, leading to poor light efficiency and image quality.
Innovation Solution
A semiconductor light-emitting element with a new structure is proposed, featuring a first semiconductor region with a circular shape and a second semiconductor region with a rectangular shape, both having recesses along their outer peripheral surfaces to enhance light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If micro-LEDs with diameter of 100 μm or less are used to achieve high resolution and modular flexibility, then resolution and adaptability are improved, but luminance and light efficiency deteriorate
Solution Approach 1:
The patent introduces a vertical dimension by forming recesses (grooves) on the side surfaces of the micro-LED structure. This three-dimensional modification allows light to be extracted and reflected from additional surfaces, effectively increasing light efficiency without changing the micro-LED's planar footprint, thus maintaining high resolution while improving luminance.
Solution Approach 2:
The patent applies local structural modification by forming recesses at specific locations (side surfaces of the micro-LED) rather than uniformly modifying the entire structure. This localized approach targets the light extraction path specifically, improving light efficiency where needed while preserving the overall compact size and resolution characteristics of the micro-LED display.
2Manufacturing precision
If micro-LEDs with diameter of 100 μm or less are used to achieve high resolution, then resolution is improved, but luminance deteriorates
Solution Approach 1:
The patent introduces a vertical dimension by forming recesses (grooves) on the side surfaces of the micro-LED structure. This three-dimensional modification allows light to be extracted and reflected from additional surfaces, effectively increasing light efficiency without changing the micro-LED's planar footprint, thus maintaining high resolution while improving luminance.
3Productivity
If self-assembly method is used to transfer micro-LEDs to achieve large-screen display, then productivity is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent employs asymmetric shape conversion where circular micro-LEDs are transformed into rectangular structures with LLO patterns. This asymmetric geometric feature enables precise positioning and alignment during the self-assembly process, allowing high-speed transfer while maintaining accurate placement on the display panel.
4Adaptability or versatility
If different semiconductor materials are used to emit different color light, then adaptability is improved, but light efficiency deteriorates
Solution Approach 1:
The patent applies local structural modification by forming recesses at specific locations (side surfaces of the micro-LED) rather than uniformly modifying the entire structure. This localized approach targets the light extraction path specifically, improving light efficiency where needed while preserving the overall compact size and resolution characteristics of the micro-LED display.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed structure improves light efficiency by allowing light to be reflected or diffused in more diverse directions, thereby increasing luminance and enhancing image quality, while also facilitating easier assembly and electrical connection in display devices.
Implementation Method 1
improves light efficiency by allowing light to be reflected or diffused in more diverse directions
Implementation Method 2
improves light efficiency by allowing light to be reflected or diffused in more diverse directions
Data Source
AI summary
A semiconductor light-emitting element includes a first semiconductor region having a first shape, a second semiconductor region having a second shape different from the first shape on the first semiconductor region, and at least one or more second recess along an outer peripheral surface of the second semiconductor region. The second recess is a texture having a bottom surface, an inner surface, and a top surface.