Six-Primary Display Color Processing for Wide Gamut Accuracy
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Solution Overview
Problem
Existing RGB color systems have limitations in achieving a wide gamut and fail to effectively utilize a larger number of primary colors for enhanced color reproduction.
Innovation Solution
A system utilizing a set of primary color signals in the CIE Yu′v′ color space, with independent luminance (Y) and colorimetric coordinates (u′,v′), processed through non-linear functions and encoded/decoded for display on viewing devices, allowing for a wider gamut using six primary colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a traditional RGB three-primary color system is used, then the system complexity is low and ease of manufacture is high, but the color gamut is limited and color reproduction accuracy is insufficient
Solution Approach 1:
The patent segments the color reproduction task into multiple independent primary color channels (six primaries: R, G, B, C, M, Y) instead of using a single three-primary system. Each primary color is processed independently through separate signal paths, allowing parallel processing and maintaining manageable system complexity while expanding color gamut capabilities
Solution Approach 2:
The patent transitions from a three-dimensional RGB color space to a six-dimensional color space by adding three more primary colors (C, M, Y). This dimensional expansion allows the system to represent colors that are impossible in the traditional three-primary space, directly addressing the color gamut limitation while using mathematical transformations to manage the increased complexity
2Measurement precision
If six primary colors are used to expand color gamut, then color reproduction accuracy is improved, but the processing complexity and computational requirements increase
Solution Approach 1:
The patent performs preliminary color space transformations and signal processing conversions before the actual color mixing stage. By pre-calculating the required signal levels for each of the six primaries based on the input color data, the system reduces real-time processing complexity while maintaining high color reproduction accuracy through advance computational preparation
Solution Approach 2:
The patent introduces intermediate color space representations (such as XYZ or other linear color spaces) as mediators between the input RGB signal and the final six-primary output. These intermediate representations simplify the mathematical transformations required and provide a structured approach to managing the complexity of converting between different color spaces with different numbers of primaries
3Quantity of substance
If more primary colors are utilized, then the color gamut is expanded, but the difficulty of detecting and measuring color accuracy increases
Solution Approach 1:
The patent implements feedback mechanisms where the actual output colors are measured and compared against the target colors, with error signals used to adjust the primary color signal levels. This closed-loop approach maintains color accuracy despite the increased complexity of measuring and controlling six primary colors, as the system continuously self-corrects based on actual performance
Data Source
AI summary
Systems and methods for a multi-primary color system for display. A multi-primary color system increases the number of primary colors available in a color system and color system equipment. Increasing the number of primary colors reduces metameric errors from viewer to viewer. One embodiment of the multi-primary color system includes Red, Green, Blue, Cyan, Yellow, and Magenta primaries. The systems of the present invention maintain compatibility with existing color systems and equipment and provide systems for backwards compatibility with older color systems.