OLED Pixel Repair Circuit Layout for Defect Recovery
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Solution Overview
Problem
Display defects occur in OLED display panels due to defective pixel circuits, affecting display quality.
Innovation Solution
A display panel design with pixel driving circuits and repair driving circuits, along with repair connection lines, allows for the electrical connection of defective pixels to repair connection lines, enabling the repair of defective pixels by using the repair driving circuits to drive the light-emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repair connection lines are added to repair defective pixels, then display reliability is improved, but device complexity increases
Solution Approach 1:
The repair connection lines are designed to serve multiple pixel driving circuit rows, allowing a single repair connection line to repair defective pixels across different rows. This multi-functional design improves reliability while controlling complexity by reducing the total number of repair connection lines needed.
Solution Approach 2:
The patent introduces a vertical dimension to the repair connection line arrangement, where repair connection lines extend along the first direction (horizontal) and overlap with pixel driving circuit rows in the second direction (vertical). This spatial arrangement allows repair connection lines to serve multiple rows, improving reliability without proportionally increasing complexity.
2Ease of repair
If multiple repair connection lines are disposed along the first direction, then ease of repair is improved, but manufacturing precision requirements increase
Solution Approach 1:
The display panel is divided into multiple pixel driving circuit rows, and repair connection lines are segmented to correspond with these rows. Each repair connection line is associated with specific rows, allowing targeted repair operations. This segmentation improves ease of repair by providing row-specific repair paths while managing manufacturing precision requirements through structured arrangement.
3Adaptability or versatility
If repair driving circuits overlap with repair connection lines, then adaptability is improved, but device complexity increases
Solution Approach 1:
The repair driving circuits and repair connection lines are merged into an integrated structure where the repair driving circuits are disposed at positions that overlap with the repair connection lines in the vertical direction. This merging enables the repair driving circuits to directly control the repair connection lines for driving light-emitting elements, improving adaptability while the integrated design helps control overall complexity.
Data Source
AI summary
Display panel, pixel repair method, and display device are provided. The display panel includes a substrate and a display area. The display area includes a plurality of pixel driving circuit rows and a plurality of light-emitting elements. The pixel driving circuit row includes pixel driving circuits. The pixel driving circuit is electrically connected to at least one light-emitting element. The display panel also includes a plurality of repair driving circuits and a plurality of repair connection lines. The repair connection line extends along a first direction. Along a direction perpendicular to a plane of the substrate, the repair driving circuit at least partially overlaps with the repair connection line. The pixel driving circuit row is disposed with at least two repair connection lines. Along the direction perpendicular to the plane of the substrate, the pixel driving circuit row at least partially overlaps with the at least two repair connection lines.