Display Luminance Correction via Dynamic Coefficient Adjustment
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Solution Overview
Problem
Existing display technologies face challenges in correcting color non-uniformity without reducing the maximum luminance of the display screen, particularly at high luminance levels, and struggle to simultaneously address luminance and color non-uniformity issues effectively.
Innovation Solution
A display apparatus and method utilizing a plurality of optical modulators to synthesize monochromatic images into a color image, with a luminance non-uniformity correction unit adjusting correction coefficients based on displayed luminance and a color non-uniformity correction unit adjusting luminance balance among monochromatic images per pixel or pixel block to correct color non-uniformity without reducing display luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the luminance of the entire display screen is made uniform by reducing the luminance of the high luminance part according to the low luminance part, then the luminance non-uniformity is corrected, but the maximum luminance of the display screen is reduced
Solution Approach 1:
The patent applies dynamics by making the correction coefficient adjustable based on the input signal level. The correction coefficient changes dynamically according to the luminance level being displayed, allowing the system to adapt the correction strength to match the current operating conditions rather than applying a fixed correction that would unnecessarily reduce maximum luminance.
Solution Approach 2:
The patent changes the parameter of the correction coefficient based on the input signal level. By adjusting this parameter according to the luminance level, the system can apply stronger correction when luminance uniformity is more critical and reduce or eliminate correction when it would harm the maximum luminance output.
2Illumination intensity
If the correction amount is set small at the high luminance, then the luminance non-uniformity correction is gentle, but the color non-uniformity remains conspicuous
Solution Approach 1:
The patent makes the correction coefficient dynamic and adjustable based on the input signal level. This allows the system to apply different correction amounts at different luminance levels, specifically enabling stronger color non-uniformity correction at high luminance levels where it would otherwise be too gentle.
Solution Approach 2:
The patent changes the correction coefficient parameter according to the input signal level to simultaneously address both luminance and color non-uniformity. By adjusting this parameter, the system can optimize the correction amount for each luminance condition, ensuring color uniformity is maintained even when operating at high luminance levels.
3Illumination intensity
If the luminance of the display screen is increased to improve visibility, then the visibility at bright location is improved, but the color non-uniformity and luminance non-uniformity become more problematic
Solution Approach 1:
The patent applies dynamics by making the correction coefficient adjustable based on the input signal level. This allows the system to maintain high display luminance for improved visibility while dynamically adjusting the correction amount to compensate for non-uniformity issues that become more problematic at higher luminance levels.
Solution Approach 2:
The patent changes the correction coefficient parameter according to the input signal level, enabling the system to simultaneously achieve high display luminance for better visibility and appropriate correction amounts to maintain image quality. The parameter adjustment ensures that non-uniformity correction is optimized for each operating condition.
Data Source
AI summary
A display apparatus includes a plurality of optical modulators that display monochromatic images, respectively, an optical system that synthesizes the monochromatic images into a color image, a luminance non-uniformity correction unit that adjusts a correction coefficient according to a luminance to be displayed, and that corrects a luminance non-uniformity in the monochromatic image using the adjusted correction coefficient, and a color non-uniformity correction unit that adjusts a luminance balance among the monochromatic images per pixel or pixel block, thereby correcting a color non-uniformity in the color image.