Multi-Primary Display Color Pipeline for Wider Gamut Compatibility
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Solution Overview
Problem
Existing color systems, particularly RGB-based displays, are limited in color gamut and face challenges in accurately reproducing a wider range of colors due to technical methods that increase viewer metameric errors and operational costs, while existing multi-primary systems are limited to internal display processing and lack a comprehensive workflow for additional color primary information.
Innovation Solution
A multi-primary color system incorporating at least four primaries, including a GPU, display engine, and display controller, applies non-linear transfer functions to luminance and colorimetric coordinates independently, enabling the display of image data on multiple devices with enhanced color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional RGB color systems are used, then device complexity is low, but color gamut is limited and metameric errors increase
Solution Approach 1:
The patent transitions from traditional 3-primary (RGB) color space to a 4-primary color space by adding a yellow primary color. This dimensional expansion allows the system to represent colors that lie outside the traditional RGB gamut, particularly in the yellow region, thereby increasing color gamut coverage without requiring a complete overhaul of the display architecture
Solution Approach 2:
The patent segments the color processing workflow into distinct stages: color space conversion from RGB to YRGB, independent luminance processing, and separate colorimetric coordinate transformation. This segmentation allows each processing stage to be optimized independently, managing system complexity while achieving expanded color gamut
2Manufacturing precision
If existing multi-primary systems are implemented, then color reproduction is enhanced, but workflow compatibility is limited to internal display processing
Solution Approach 1:
The patent implements a universal color management system that can process both traditional RGB content and expanded YRGB content through the same pipeline. The system maintains compatibility with existing RGB workflows while simultaneously supporting the extended 4-primary color space, allowing seamless integration across different content types and display devices
Solution Approach 2:
The patent introduces an intermediary color space conversion stage that acts as a bridge between traditional RGB content and the extended YRGB display space. This intermediary conversion layer enables existing RGB content to be properly transformed and displayed on multi-primary devices without requiring changes to the source content or complete workflow redesign
3Measurement precision
If independent processing of luminance and colorimetric coordinates is applied, then color accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent segments the color processing into independent luminance and colorimetric coordinate transformations. By separating these processing streams, each can be optimized independently with appropriate algorithms and transfer functions, improving colorimetric accuracy while managing processing complexity through modular design
Solution Approach 2:
The patent applies different parameter transformations to luminance and colorimetric coordinates based on their respective requirements. Luminance undergoes gamma correction and tone mapping appropriate for human perception, while colorimetric coordinates use chromaticity transformations that preserve color relationships. This parameter-specific processing enhances accuracy without uniformly increasing complexity across all processing paths
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.