Multi-Primary Color System for Metameric Error Reduction
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Solution Overview
Problem
Current color systems, particularly those based on RGB, are limited in their ability to expand color gamut effectively, leading to increased viewer metameric errors and higher operational costs due to the need for increased power from lower illumination sources, and they lack the capability to directly manipulate color saturation beyond brightness adjustments.
Innovation Solution
A multi-primary color system that includes at least four primaries, such as red, green, blue, cyan, magenta, and yellow, with additional color primaries like white, which allows for a wider color gamut by using orthogonal color primaries and advanced encoding and decoding methods to transport and display six primary color information, including the use of XYZ or Yxy colorimetric coordinates and non-linear functions to enhance color representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RGB color system is used, then device complexity is low, but color gamut is limited and viewer metameric errors increase
Solution Approach 1:
The patent segments the color representation into multiple independent primary channels (R, G, B, C, M, Y, W) instead of using a single RGB triplet. Each primary color is independently controllable, allowing precise manipulation of color gamut without requiring complete system redesign. This segmentation enables progressive expansion from 3 to 6+ primaries while maintaining manageable complexity through modular architecture.
Solution Approach 2:
The patent adds dimensional expansion to the color space by introducing additional primary color channels beyond the traditional three-dimensional RGB space. This creates a six-dimensional or higher color space (RGBCMYW), enabling representation of colors that lie outside the conventional RGB gamut while maintaining backward compatibility through projection techniques.
2Adaptability or versatility
If additional color primaries are added to expand color gamut, then color representation improves, but power consumption increases due to lower illumination sources
Solution Approach 1:
The patent implements partial action by allowing selective activation of only the necessary primary color channels based on the specific color being displayed. Not all six or more primaries need to operate at full intensity simultaneously; the system dynamically adjusts which primaries are active and at what intensity levels, reducing overall power consumption while maintaining color saturation when needed.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the intensity and contribution of each primary color channel based on the desired output color. This enables efficient power management by optimizing the combination of primaries for each pixel, using higher illumination only when and where color saturation is required, rather than uniformly across the entire display.
3Ease of operation
If current RGB systems are used, then ease of operation is high, but capability to manipulate color saturation independently from brightness is lost
Solution Approach 1:
The patent creates a universal color system that can operate in multiple modes: traditional RGB compatibility mode for backward compatibility, and expanded RGBCMYW mode for enhanced color manipulation. The encoding and decoding architecture is designed to handle both modes, allowing the system to universally support various color manipulation requirements without requiring separate hardware systems.
Solution Approach 2:
The patent introduces intermediary conversion layers and lookup tables that translate between traditional RGB input signals and the expanded multi-primary output space. These intermediaries enable complex color saturation and brightness manipulation while presenting a simplified interface to users and legacy systems, effectively mediating between ease of operation and advanced functionality.
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.