Segmented Pixel Electrode Layout for Defect-Tolerant Displays
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Solution Overview
Problem
Display devices face challenges in minimizing pixel defects and maintaining luminance, as existing technologies struggle to effectively compensate for defective areas within pixels, leading to reduced display quality.
Innovation Solution
The display device incorporates a pixel design where the first electrode is divided into area electrodes corresponding to the number and position of light emitting elements, allowing for the division of one pixel into areas, enabling normal operation of remaining areas even if one area is defective, with an insulating layer and auxiliary adhesive layer used to enhance bonding and prevent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first electrode is divided into area electrodes corresponding to the number and position of light emitting elements, then the defective range within a pixel area is minimized and luminance is compensated, but the device complexity increases
Solution Approach 1:
The first electrode is divided into multiple area electrodes (first area electrode, second area electrode, third area electrode) that are spatially separated and correspond to different regions where light emitting elements are disposed. This segmentation allows independent control and operation of different pixel regions, so that when a defect occurs in one area, other areas can continue to function normally, thereby minimizing the defective range and compensating for luminance loss.
2Reliability
If area electrodes are disposed corresponding to pixel areas with different numbers of light emitting elements, then luminance compensation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
Each area electrode is designed with specific local characteristics - the first area electrode corresponds to a first pixel area with a certain number of light emitting elements, the second area electrode corresponds to a second pixel area with a different number of light emitting elements, and the third area electrode corresponds to a third pixel area. This local quality differentiation allows each area electrode to be optimized for its specific region, improving luminance compensation capability while maintaining manageable manufacturing precision requirements through localized optimization rather than uniform design.
Data Source
AI summary
A display device includes a pixel, the pixel includes at least one light emitting element including a first end and a second end; a first electrode overlapping the at least one light emitting element and electrically connected to the first end of the at least one light emitting element; and a second electrode overlapping the at least one light emitting element and the first electrode and electrically connected to the second end of the at least one light emitting element, and the first electrode includes area electrodes divided according to a number and a position of area electrodes overlapping the at least one light emitting element.