Light Engine Array Series Circuitry for Micro LED Yield
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Solution Overview
Problem
Current display technologies, particularly in wearable electronic devices, face challenges in achieving efficient and reliable full-color imaging using micro LEDs due to issues with epitaxial defects and particle-related failures, which affect the yield and quality of the LED array.
Innovation Solution
The implementation of a light engine array with a series circuitry design and redundancy circuitry structure, where multiple LEDs are connected in series within each sub-pixel region, allowing functional LEDs to support each other in case of failure, and the use of a color conversion module to achieve full-color display without additional conversion layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple LEDs are connected in series within each sub-pixel region, then the reliability of the LED array is improved, but the device complexity increases
Solution Approach 1:
The LED array is divided into multiple sub-pixel regions, with each sub-pixel containing a series connection of multiple LEDs. This segmentation allows functional LEDs within a sub-pixel to support each other in case of failure, improving overall reliability while maintaining manageable complexity through modular organization.
Solution Approach 2:
Redundancy circuitry is built into the structure beforehand, where functional LEDs are positioned to support each other in case of failure. This prior cushioning ensures that if one LED fails, the series connection and redundancy design allow the sub-pixel to remain functional, improving reliability before failures occur.
2Manufacturing precision
If a color conversion module is used to achieve full-color display, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The color conversion module integrates multiple functions into a single structure, combining color conversion capabilities with the LED array configuration. This merging approach achieves full-color display without requiring separate additional conversion layers for each sub-pixel, improving manufacturing precision while reducing overall device complexity.
Solution Approach 2:
The color conversion module serves multiple functions simultaneously: it converts wavelengths to achieve full-color display, maintains structural integrity across the array, and works uniformly across all sub-pixels. This multi-functionality improves manufacturing precision by using a single versatile component rather than multiple specialized layers.
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
This approach enhances the yield and quality of the LED array by ensuring each sub-pixel can be lit up even with defective LEDs, and achieves full-color display without the need for additional color conversion layers, improving the reliability and efficiency of micro LED displays.
Implementation Method 1
semiconductor Light Emitting Array Unit Module
Data Source
AI summary
The invention discloses a light engine array having at least an anode and a cathode comprising: a first type semiconductor layer; an active layer; and a second type semiconductor layer; a cathode electrode has a conductive metal layer in electrical contact with a portion of the first type semiconductor layer, and the second type semiconductor layer to form a short circuit structure in a common cathode region; and an anode electrode has the conductive metal layer and coupled to a portion of the first type semiconductor layer; wherein, the anode electrode is electrically isolated with the active layer and the second type semiconductor layer in a sub-pixel region.