Multi-Primary Display Color Control for Wider Gamut Accuracy
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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 wide range of colors due to technical methods that increase viewer metameric errors and operational costs, lacking the ability to independently control color saturation and luminance.
Innovation Solution
A multi-primary color system incorporating at least four primaries, including RGB and additional colors like cyan, magenta, and yellow, with a graphics processing unit (GPU) and display engine that apply non-linear transfer functions to luminance, enabling independent control of colorimetric coordinates for enhanced color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional RGB color system is used, then device complexity is low, but color gamut is limited and color accuracy deteriorates
Solution Approach 1:
The patent segments the color control function by introducing independent luminance control channels separate from colorimetric coordinates. The display system divides color control into two independent parts: colorimetric coordinates (x, y) for hue and saturation, and luminance (Y) for brightness, allowing precise control of each aspect without interfering with the other.
Solution Approach 2:
The patent adds a new dimension to color control by introducing independent luminance control alongside colorimetric coordinates. Instead of controlling only three color primaries (RGB), the system now controls six parameters (three colorimetric coordinates and three luminance values), effectively adding control dimensions to achieve wider color gamut and higher accuracy.
2Manufacturing precision
If color saturation and luminance are controlled together, then system operation is simple, but color accuracy deteriorates due to metameric errors
Solution Approach 1:
The patent segments color control into two independent operations: colorimetric coordinate control (x, y) for hue and saturation, and luminance control (Y) for brightness. This segmentation allows the system to control color properties independently without causing metameric errors that occur when controlling saturation and luminance together in traditional systems.
Solution Approach 2:
The patent introduces an intermediary processing stage between the input signal and display output, where colorimetric coordinates and luminance are separately processed and then combined. This intermediary step ensures that color accuracy is maintained while luminance is independently adjusted, reducing metameric errors.
3Manufacturing precision
If traditional RGB displays are used, then power consumption is low, but color gamut is limited
Solution Approach 1:
The patent makes the display system multi-functional by enabling it to operate in both traditional RGB mode and enhanced multi-primary mode. The same display hardware can reproduce standard colors using RGB while also reproducing extended color gamut colors by activating additional primary channels, providing universal compatibility across different color space requirements.
Solution Approach 2:
The patent changes the operational parameters of the display system by introducing additional primary color channels and independent luminance control. By adjusting the number of active primary channels and their respective luminance levels, the system can adapt to different color gamut requirements while optimizing power consumption based on the specific color reproduction needs.
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.