Display Luminance Correction via Curved Plane Distribution
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Solution Overview
Problem
Existing image correction methods for display panels, such as liquid crystal displays, often degrade contrast and introduce stripe noise and color unevenness due to limitations in adjusting luminance levels, where the highest gradation level luminance can only be lowered and the lowest gradation level luminance can only be raised, leading to suboptimal display quality.
Innovation Solution
The method involves correcting luminance to form a curved plane with the highest luminance at the center of the panel decreasing towards the edges at the highest gradation level and the lowest luminance at the center increasing towards the edges at the lowest gradation level, using interpolation techniques and correction data to maintain uniformity and improve contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the highest gradation level luminance is lowered to correct in-plane variation, then luminance uniformity is improved, but contrast is degraded
Solution Approach 1:
The patent applies different luminance correction strategies to different regions of the display panel. The center region uses one correction approach while the edge region uses another, allowing each region to be optimized independently for both uniformity and contrast preservation
Solution Approach 2:
The patent introduces curved plane corrections for both the highest and lowest gradation levels. The highest gradation level is corrected to form a curved plane with maximum luminance at the center, while the lowest gradation level forms a curved plane with minimum luminance at the center, preventing contrast degradation while maintaining uniformity
2Manufacturing precision
If the lowest gradation level luminance is raised to correct in-plane variation, then luminance uniformity is improved, but contrast is degraded
Solution Approach 1:
Different correction approaches are applied to center and edge regions. The edge region of the lowest gradation level receives specific correction to raise luminance without compromising overall contrast
Solution Approach 2:
The lowest gradation level is corrected to form a curved plane with minimum luminance at the center and higher luminance at the edges, which corrects in-plane variation while preserving contrast through the curved distribution
3Manufacturing precision
If conventional correction methods are used to achieve luminance uniformity, then in-plane variation is reduced, but stripe noise and color unevenness occur
Solution Approach 1:
The patent introduces curved plane corrections that create smooth luminance transitions across the display panel. By forming curved planes with maximum or minimum luminance at the center and gradual transitions to the edges, the method eliminates abrupt luminance changes that cause stripe noise and color unevenness
Solution Approach 2:
The patent dynamically adjusts correction values based on the position on the display panel, using different correction strategies for center and edge regions. This dynamic correction approach prevents the formation of static patterns like stripes and color unevenness
Data Source
AI summary
A luminance distribution at the highest gradation level is corrected to a curved plane luminance distribution in such a manner that the maximum gradation input to a display panel shows a curved luminance plane having the highest luminance at the center of the display panel and a lower luminance in the peripheral area of the display panel. The luminance distribution at the minimum gradation is corrected in such a manner that the minimum gradation shows a curved luminance plane having the lowest luminance at the center of the display panel and a higher luminance in the peripheral area of the display panel.