OLED Display Edge Sub-pixel Arrangement for Color Homogeneity
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Solution Overview
Problem
In OLED display devices, the asymmetric pixel arrangement and high-density light-emitting diodes lead to a color-edge effect where human eyes fail to homogenize RGB lights effectively, resulting in visible color edges due to unbalanced chroma at the screen edges.
Innovation Solution
The method involves adjusting the positions, areas, or brightness of sub-pixels in pixel units at the edges of the display panel to achieve a balanced RGB chroma, using software to analyze and compensate pixel data, ensuring a uniform alternate arrangement or reduced size/brightness of sub-pixels to eliminate color edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-density light-emitting diodes are used to increase pixel density, then display resolution is improved, but color edge phenomenon occurs at screen edges due to asymmetric pixel arrangement
Solution Approach 1:
The patent applies different pixel arrangement strategies to different regions of the display panel. Edge pixel units use a symmetric arrangement where sub-pixels are positioned to balance RGB chroma, while central pixel units maintain the original high-density asymmetric arrangement. This local differentiation eliminates color edge phenomena at screen edges while preserving high display resolution in the central viewing area.
Solution Approach 2:
The patent modifies the positional parameters of sub-pixels in edge pixel units to achieve symmetric arrangement. Specifically, the coordinates and spacing of red, green, and blue sub-pixels are adjusted to balance their chroma contribution at edge positions, transforming the parameter set from high-density asymmetric to balanced symmetric configuration for edge regions only.
2Quantity of substance
If asymmetric pixel arrangement is used to achieve high-density display, then pixel density is improved, but RGB chroma balance deteriorates at edge positions
Solution Approach 1:
The patent implements region-specific pixel arrangements where edge pixel units adopt a symmetric configuration optimized for chroma balance, while central pixel units maintain the asymmetric high-density arrangement. This allows RGB chroma balance to be stabilized at edge positions without compromising overall pixel density.
Solution Approach 2:
The display panel is segmented into edge regions and central regions, each with optimized pixel arrangements. Edge regions use symmetric pixel units with adjusted sub-pixel positions to ensure chroma balance, while central regions use the original asymmetric design for maximum pixel density. This segmentation resolves the chroma balance issue locally without affecting global pixel density.
Data Source
AI summary
A method for reducing a color edge phenomenon of a display panel is provided. The method is applicable to a display panel including a plurality of pixel units. The method includes: performing pixel adjustment on the pixel units at edges of the display panel. Each pixel unit includes at least three sub-pixels: a first sub-pixel, a second sub-pixel, and a third sub-pixel. By adjusting positions, areas, or brightness of the sub-pixels, the color edge phenomenon of the display panel is effectively reduced or avoided.