Multi-Primary Display Color Processing to Reduce Metameric Errors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing color systems, particularly RGB-based displays, face limitations in color gamut and efficiency, leading to increased viewer metameric errors and higher operational costs due to narrow emissive spectra and reliance on brightness changes for saturation control, without effectively utilizing additional color primaries outside the display's internal processing.
Innovation Solution
A multi-primary color system incorporating at least four primaries, including RGB with additional colors like cyan, magenta, and yellow, utilizing a graphics processing unit (GPU) and display engine to apply non-linear transfer functions to luminance and colorimetric coordinates, enabling wider gamut displays that separate luminance from colorimetric coordinates for improved color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional RGB color system is used, then device complexity is low, but color gamut is narrow and metameric errors increase
Solution Approach 1:
The invention segments the color reproduction task by separating luminance processing from colorimetric coordinate processing. The luminance path handles brightness information while the colorimetric path handles color information, allowing independent optimization of each path and enabling wider color gamut without proportionally increasing overall system complexity
Solution Approach 2:
The patent introduces an intermediary color conversion stage that transforms traditional RGB values into a multi-primary color space with wider gamut. This intermediary conversion layer acts as a bridge between standard RGB inputs and the extended color space, enabling broader color reproduction without requiring complete system redesign
2Manufacturing precision
If brightness changes are used for saturation control, then ease of operation is maintained, but operational costs increase and color accuracy deteriorates
Solution Approach 1:
The invention changes the fundamental parameter for saturation control from luminance/brightness adjustments to chromaticity coordinate modifications in the multi-primary color space. By manipulating colorimetric coordinates independently of luminance, the system achieves accurate saturation control without the energy waste and color accuracy degradation associated with brightness-based methods
3Adaptability or versatility
If additional color primaries are incorporated, then color gamut increases, but device complexity and processing requirements increase
Solution Approach 1:
The processing system is segmented into distinct luminance and colorimetric coordinate paths, allowing separate optimization and processing of brightness and color information. This segmentation reduces the complexity burden of handling additional color primaries by treating luminance and color as independent processing streams
Solution Approach 2:
The patent implements a universal color conversion framework that can handle both traditional RGB and extended multi-primary color spaces through the same processing architecture. This multi-functional approach allows the system to accommodate additional color primaries without requiring separate processing pipelines for different color models
Data Source
AI summary
The present invention includes 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.