μLED Subpixel Repair Layout for Transfer Defect Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Micro light-emitting diodes (μLEDs) in display panels can malfunction or become misaligned during the mass transfer process, affecting display quality and necessitating effective repair methods.
Innovation Solution
A display device design with parallel-connected repair light-emitting elements in default and repair areas, combined with digital compensation techniques to manage brightness and prevent bright spots, addresses malfunctions and misalignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If micro light-emitting diodes are transferred in large numbers to specific locations, then display resolution is improved, but defects and misalignments increase
Solution Approach 1:
The patent applies preliminary action by pre-transferring repair light-emitting elements to repair areas before the actual display light-emitting elements are transferred to default light-emitting areas. This preparatory step ensures that replacement components are already in position, enabling quick repair of defects without disrupting the overall display assembly process.
Solution Approach 2:
The patent segments the display panel into multiple sub-pixel areas, each containing both a default light-emitting area and a repair area. This segmentation allows independent testing and repair of individual sub-pixels, isolating defects to specific regions and enabling targeted repairs without affecting the entire display panel.
2Reliability
If repair light-emitting elements are added to each sub-pixel area, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the default light-emitting area and repair area into a single integrated sub-pixel area, with both areas sharing common driving circuitry and control mechanisms. This merging approach allows the repair function to be added without proportionally increasing overall device complexity, as the repair light-emitting elements utilize existing structural and electrical infrastructure.
Solution Approach 2:
The patent implements multi-functionality by designing the sub-pixel area to serve dual purposes: the default light-emitting area for normal display operation and the repair area for defect compensation. The same driving circuits and control systems manage both functional areas, allowing a single structural unit to perform multiple functions without requiring separate dedicated systems for each.
3Ease of repair
If multiple light-emitting elements are disposed in each sub-pixel area, then repair capability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by creating distinct default and repair areas within each sub-pixel, where each area has a specific function. The default light-emitting area is optimized for normal display operation, while the repair area is specifically designed and prepared for defect compensation. This localized functional differentiation allows repair operations to be performed with relaxed precision requirements compared to the main display area.
Data Source
AI summary
A display device includes first, second, and third sub-pixels. The first, second, and third sub-pixels each have a default light-emitting area and a repair area. The first sub-pixel includes a first light-emitting element and a first repair light-emitting element respectively disposed in the default light-emitting area and the repair area. The second sub-pixel includes a second repair light-emitting element disposed in the repair area. The third sub-pixel includes a third light-emitting element disposed in the default light-emitting area. The first light-emitting element, the first repair light-emitting element, the second repair light-emitting element, and the third light-emitting element are light-emitting elements of the same color.