OLED Edge Brightness Compensation via Main Body Parameter Mapping
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Solution Overview
Problem
OLED display panels face issues of brightness non-uniformity and afterimages due to non-uniformity in thin film transistor parameters, which existing compensation technologies struggle to completely solve, especially on curved displays where edge brightness is often higher than non-edge portions after optical compensation.
Innovation Solution
An optical compensation method for OLED display panels that involves selecting a pixel block in the edge region and acquiring its compensation parameter from the closest pixel block in the main body region, using a camera to capture image data, and applying a compensation algorithm to adjust pixel compensation parameters for uniform brightness across the panel, including curved surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If optical compensation is applied to the entire display panel including edge regions, then brightness uniformity should be improved, but edge brightness becomes higher than non-edge portions due to non-uniform thin film transistor parameters
Solution Approach 1:
The display panel is divided into a main body region and an edge region, and pixel blocks are further divided into first pixel blocks (in the main body region) and second pixel blocks (in the edge region). This segmentation allows different compensation strategies to be applied to different regions, addressing the specific brightness non-uniformity issues in edge regions while maintaining overall brightness uniformity across the entire display panel.
Solution Approach 2:
Different pixel blocks are assigned different compensation parameters based on their specific location and characteristics. First pixel blocks in the main body region receive compensation parameters determined through standard optical compensation, while second pixel blocks in the edge region receive compensation parameters specifically optimized for edge characteristics. This local quality approach ensures that each region receives appropriate compensation tailored to its specific non-uniformity issues.
2Illumination intensity
If compensation parameters are determined for all pixel blocks individually, then brightness uniformity is improved, but compensation complexity and time consumption increase
Solution Approach 1:
Adjacent pixel blocks that share similar characteristics are merged into the same compensation parameter set. By determining compensation parameters for representative pixel blocks and applying them to multiple adjacent pixel blocks, the total number of independent compensation calculations is reduced, thereby decreasing compensation time while maintaining brightness uniformity across the display panel.
Solution Approach 2:
A single compensation parameter set is designed to serve multiple pixel blocks with similar characteristics. The compensation parameters determined for first pixel blocks can be applied to multiple first pixel blocks, and similarly for second pixel blocks. This universality reduces the overall compensation complexity and time consumption while still achieving uniform brightness across different regions.
Data Source
AI summary
An optical compensation method for a display panel and an optical compensation device are provided. The optical compensation method for the display panel includes selecting a pixel block to be compensated in an edge region; and acquiring a pixel compensation parameter of at least one pixel block in a main body region as a pixel compensation parameter of the pixel block to be compensated.