Micro LED Display Panel E-Fuse Isolation for Defective Pixels
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Solution Overview
Problem
Existing display panels with micro LED elements face issues of defective pixels due to redundancy structures that increase the number of driving circuits, complicate wiring, and lower transmittance, while also being vulnerable to moisture and oxygen permeation.
Innovation Solution
A redundant micro LED display panel design with duplicated light-emitting diodes and e-fuses that allow electrical isolation of defective pixels, reducing the number of wirings and transistors, and maintaining high aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundancy structure with two or more micro LED elements is arranged per pixel to eliminate defective pixels, then the reliability of the display panel is improved, but the number of driving circuits increases and the device complexity increases
Solution Approach 1:
Multiple sub-pixels share a common driving circuit. Specifically, a first driving circuit drives both a first sub-pixel and a second sub-pixel, reducing the total number of driving circuits while maintaining the ability to independently control each sub-pixel through selective activation of light emitting diodes within each sub-pixel
2Reliability
If a redundancy structure with two or more micro LED elements is arranged per pixel to eliminate defective pixels, then the reliability of the display panel is improved, but the transmittance of the panel is lowered
Solution Approach 1:
Each sub-pixel is divided into multiple light emitting diodes (e.g., first and second light emitting diodes) that can be independently controlled. This segmentation allows the panel to maintain high transmittance by using fewer overall components while still providing redundancy through multiple diodes per sub-pixel that can be selectively activated
3Reliability
If a redundancy structure with two or more micro LED elements is arranged per pixel to eliminate defective pixels, then the reliability of the display panel is improved, but the number of wirings increases and manufacturing costs increase
Solution Approach 1:
Multiple sub-pixels share common wiring structures including data lines, emission control signal lines, and driving circuits. This merging of wiring resources reduces the total number of wirings required while maintaining the redundancy structure, thereby lowering manufacturing complexity and cost
Data Source
AI summary
The present disclosure relates to a display panel and a method for electrical-isolation of a light-emitting diode in the display panel. In one embodiment, a display panel includes an element region contained in each sub-pixel, wherein two or more light-emitting diodes are arranged in the element region; and two or more e-fuses respectively connected to the two or more light-emitting diodes, wherein at least one of the two or more e-fuses has blown; and two or more e-fuse transistors respectively connected to the two or more e-fuses.