Multi-Primary Display Color Conversion for Unique Gamut Mapping
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Solution Overview
Problem
Existing display technologies with four or more primary colors face the challenge of determining a unique solution for synthesizing target colors due to multiple possible linear combinations of driving components.
Innovation Solution
An image conversion method that sets specific driving components to maximum or minimum values within defined ranges, particularly the first and M-th primary colors with the longest and shortest wavelengths, to simplify calculations and ensure a unique solution for color synthesis, reducing the impact of short-wavelength light on the human eye.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple primary colors (M≥4) are used to enhance color performance, then color saturation and richness are improved, but the number of possible linear combinations for synthesizing target colors increases, making it difficult to determine a unique solution
Solution Approach 1:
The patent applies parameter changes by transforming the color synthesis problem from a general M-primary-color system to a specific 3-primary-color subsystem. By identifying which three primary colors form a valid basis (linearly independent) and excluding the redundant primary color, the system changes the parameters of the synthesis equation to ensure a unique solution while maintaining accurate color reproduction.
2Adaptability or versatility
If conventional color synthesis methods are used with M≥4 primary colors, then color gamut is expanded, but calculation complexity increases and unique solution cannot be guaranteed
Solution Approach 1:
The patent extracts the essential 3-primary-color subsystem from the M-primary-color system by identifying and removing redundant primary colors. This extraction process simplifies the calculation by working with only the necessary three primary colors that can uniquely represent any target color within their combined color gamut, while the overall system still supports M primary colors for enhanced color performance.
3Measurement precision
If all primary colors are used for color synthesis, then color accuracy is maintained, but exposure to harmful short-wavelength light increases
Solution Approach 1:
The patent applies local quality by differentiating the roles of different primary colors in the synthesis process. Instead of treating all M primary colors equally, the method selectively uses only three primary colors for each target color synthesis, allowing other primary colors (particularly those with harmful short wavelengths) to be excluded or minimized, thus protecting against harmful light exposure while maintaining color accuracy through the selected trio.
Data Source
AI summary
Provided are an image conversion method and a display device. The image conversion method includes: acquiring a target color, and determining a target color point of the target color in a chromatic diagram, where the chromatic diagram includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4; defining M driving components corresponding to the M primary colors and a relationship equation between a color coordinate of the target color point and a color coordinate of each primary color point; determining value ranges of the driving components according to the relationship equation, setting a first driving component to a maximum value, and/or setting an M-th driving component to a minimum value, and determining values of remaining (M−1) driving components. The M primary colors include a first primary color to an M-th primary color.