Six-Primary Color Conversion Using XYZ Pseudo White Points
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Solution Overview
Problem
Existing RGB color systems struggle to display a wide range of colors beyond the ITU-R BT.2020 color gamut, limiting the representation of colors outside this range.
Innovation Solution
A six-primary color system is introduced, incorporating a cyan primary, which allows for the display of colors outside the ITU-R BT.2020 color gamut, with a viewing device capable of displaying at least 80% of the total area between 400 nm and 700 nm in the CIE Yxy color space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional RGB color system is used, then the system complexity is low, but the color gamut coverage is limited to ITU-R BT.2020
Solution Approach 1:
The color system is segmented into six independent primary color channels (R, G, B, C, M, Y) instead of the traditional three, allowing each primary to contribute independently to the overall color gamut coverage. This segmentation enables the system to display colors outside the BT.2020 gamut while maintaining manageable complexity through modular processing of each color channel.
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 cover a broader color gamut volume, displaying at least 80% of the total area between 400 nm and 700 nm in the CIE Yxy color space, while using conversion matrices to manage the increased complexity.
2Measurement precision
If colors outside BT.2020 gamut are displayed, then color accuracy is improved, but the conversion complexity increases
Solution Approach 1:
The patent performs preliminary color space conversion by transforming XYZ color values to six-primary color values using pre-defined conversion matrices before display. This preliminary action ensures that colors outside the BT.2020 gamut are accurately represented in the six-primary color space, with the conversion complexity managed through standardized matrix operations rather than real-time complex calculations.
Solution Approach 2:
The patent introduces XYZ color space as an intermediary coordinate system between the input color data and the six-primary display system. By converting through this intermediate XYZ space, the system achieves accurate color representation outside BT.2020 gamut while simplifying the overall conversion process, as XYZ serves as a universal intermediary that bridges different color spaces.
3Adaptability or versatility
If a six-primary color system is implemented, then color spectrum coverage is expanded to at least 80% of 400-700 nm, but the manufacturing complexity increases
Solution Approach 1:
The six-primary color system is designed with universal conversion matrices that can be applied across different display technologies and implementations. The same XYZ to six-primary conversion framework works for various substrate and colorant combinations, making the system universally applicable and easier to manufacture across different device types while maintaining expanded color spectrum coverage of at least 80% of the 400-700 nm range.
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.