Display Panel Repair Circuit Layout for Defective Pixel Recovery
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Solution Overview
Problem
OLED display panels suffer from display defects due to defective pixel circuits, affecting brightness and display quality.
Innovation Solution
Incorporation of repair driving circuits and connection lines in the display panel design, allowing for electrical connection of defective pixels to repair lines, enabling the use of shared scanning and control signals to restore functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repair driving circuits and connection lines are added to the display panel, then pixel repair capability and reliability are improved, but device complexity increases
Solution Approach 1:
The repair driving circuits share the same scanning signal lines and control signals with the normal pixel driving circuits, allowing them to perform both repair functions and normal display functions using the same infrastructure
Solution Approach 2:
The repair connection lines act as intermediaries to connect defective light-emitting elements to the repair driving circuits, enabling signal transmission without requiring direct modification of the original pixel circuit
2Ease of repair
If multiple repair connection lines are provided for each pixel driving circuit row, then pixel repair capability is improved, but manufacturing complexity increases
Solution Approach 1:
The repair connection lines are segmented and distributed across different pixel driving circuit rows, with each row having at least one repair connection line that can be independently controlled and activated
Solution Approach 2:
The patent introduces a vertical dimension by having repair driving circuits positioned in different rows that can overlap with multiple pixel driving circuit rows in the horizontal direction, allowing a single repair circuit to serve multiple rows
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.