CMY Boost Function for High Brightness Display Color Saturation
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Solution Overview
Problem
High brightness displays, particularly those with RGBW or multiprimary subpixel layouts, face the issue of desaturation and darkening of bright mixed colors like yellow, cyan, and magenta when rendered against a white or light background due to simultaneous contrast effects.
Innovation Solution
The system employs a CMY boost function within the image processing pipeline to analyze input color data and adjust the luminance of low-valued colors, ensuring smooth transitions by computing substitute color values based on the presence of major and minor colors, effectively mapping the input gamut to an output gamut that enhances color brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high brightness displays with RGBW or multiprimary subpixel layouts are used, then display brightness is improved, but color saturation deteriorates when rendering bright mixed colors against white or light backgrounds
Solution Approach 1:
The patent dynamically adjusts color parameters (luminance and saturation) based on the background luminance. When a bright mixed color (yellow, cyan, or magenta) is detected against a light background, the system modifies the color data to compensate for the simultaneous contrast effect, thereby maintaining color saturation while preserving the high brightness capability of the display.
Solution Approach 2:
The system analyzes the input color data to detect the presence of bright mixed colors and determines the background luminance level. Based on this feedback, it automatically applies appropriate color adjustments to prevent desaturation, creating a closed-loop control system that maintains color accuracy across different display conditions.
2Measurement precision
If standard gamut mapping is used, then color accuracy is maintained, but bright mixed colors appear dark or desaturated on high brightness displays
Solution Approach 1:
The patent modifies the standard gamut mapping process by introducing dynamic adjustments to luminance and saturation parameters. When bright mixed colors are detected, the system increases their luminance and saturation levels beyond standard mapping, ensuring they remain vibrant and visible against light backgrounds while maintaining overall color accuracy.
Solution Approach 2:
The system applies selective adjustments only to specific color regions (yellow, cyan, and magenta) that are affected by simultaneous contrast, while leaving other colors unchanged. This localized approach ensures that color accuracy is maintained for unaffected colors while correcting the specific desaturation issue in bright mixed colors.
Data Source
AI summary
In one embodiment of the display system, the display system comprises an image pipeline that accepts input color image data of one color gamut to be rendered on a display having high brightness subpixel layouts. In one embodiment, the system comprises a boost function that maps the input color data onto another color gamut that boosts the luminance of colors that might appear dark if rendered against a white or very light background.