Display Subpixel Luminance Compensation for Green Dot Reduction
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Solution Overview
Problem
Conventional display devices face challenges in effectively managing luminance values of subpixels, particularly in maintaining color accuracy and reducing the visibility of green subpixels at the ends of display lines, which can lead to conspicuous green dots and affect the overall display quality.
Innovation Solution
A display device configuration with a controller that modifies luminance data by increasing the luminance values of adjacent red and blue subpixels for green subpixels at the ends of display lines, ensuring these values are higher than 0, thereby reducing the visibility of green and enhancing color mixing and display precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If luminance values of green subpixels at the ends of display lines are reduced or turned off, then the visibility of green dots is reduced, but color uniformity and display precision deteriorate
Solution Approach 1:
The patent converts the harmful effect of visible green subpixels at line ends into a benefit by compensating their luminance through adjacent red and blue subpixels. Instead of simply turning off the green subpixels (which would cause color non-uniformity), the invention uses the green subpixels' position to trigger luminance compensation in neighboring subpixels, thereby eliminating the green dot visibility issue while maintaining overall color accuracy and display precision.
Solution Approach 2:
The patent changes the luminance parameter of adjacent red and blue subpixels in response to the position of green subpixels at line ends. When a green subpixel is detected at a line end, the luminance values of its adjacent red and blue subpixels are increased to compensate for the reduced or turned-off green subpixel luminance, thereby maintaining color uniformity while reducing green dot visibility.
2Stability of the object's composition
If luminance values of red and blue subpixels are increased to compensate for green subpixels, then color uniformity is improved, but luminance data complexity increases
Solution Approach 1:
The patent applies local quality by making luminance compensation only for specific subpixels located at line ends, rather than uniformly adjusting all subpixels. The controller selectively increases luminance values of red and blue subpixels adjacent to green subpixels at line ends, leaving other subpixels unchanged. This localized approach maintains color uniformity where needed while minimizing overall processing complexity.
Data Source
AI summary
A display device includes a display panel including a plurality of panel pixel lines, and a controller configured to control the display panel. The controller is configured to receive image data for a picture frame, generate luminance data for the display panel from the image data, and modify the luminance data for the display panel by raising luminance values of a red subpixel and a blue subpixel adjacent along a first display line to a green subpixel located at an end of the first display line at outside of the first display line, the first display line being composed of a plurality of panel pixels consecutive in the first direction and assigned luminance values higher than 0.