Display Color Adjustment via CIE2015 Transformation Matrix
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High definition display devices face challenges in achieving precise color adjustment due to the limitations of the CIE1931 coordinate system, leading to metameric colors and inconvenient RGB gain and offset adjustments that affect brightness and color gamut.
Innovation Solution
A display device with a storage unit, display unit, and processing unit that includes a color adjustment interface with a reference color block and offset color blocks, allowing users to select a target offset color block to update color coordinates and calculate a color transformation matrix for real-time RGB adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CIE1931 coordinate system is used for color calibration, then color measurement can be performed, but metameric colors still exist and color precision is insufficient
Solution Approach 1:
The patent changes the color coordinate system parameters from CIE1931 to CIE2015, which provides better alignment with human color vision and eliminates metamerism issues. This parameter change enables more accurate color representation and transformation, directly resolving the contradiction between measurement capability and color accuracy.
2Ease of operation
If RGB gain and offset adjustment is performed, then color adjustment can be made, but brightness and color gamut are affected and operation is inconvenient
Solution Approach 1:
The patent segments the color adjustment process into independent chrominance and brightness components. By using CIE2015 color space transformation, chrominance adjustment can be performed independently without affecting brightness, and vice versa. This segmentation allows users to adjust color without inadvertently changing brightness or color gamut, resolving the contradiction between operational convenience and parameter stability.
Solution Approach 2:
The patent introduces a color transformation matrix as an intermediary mechanism between user input and actual color output. This matrix performs precise chrominance adjustments while automatically preserving brightness and color gamut characteristics, making the adjustment process both convenient and reliable without requiring users to understand complex color theory.
3Measurement precision
If external color analyzer is used for color adjustment, then accurate color measurement can be achieved, but device complexity and cost increase
Solution Approach 1:
The patent enables the display device to perform its own color calibration and adjustment using built-in processing capabilities. The device calculates color transformation matrices internally based on CIE2015 color space, eliminating the need for external color analyzers. This self-service approach maintains measurement accuracy while significantly reducing system complexity and cost.
Solution Approach 2:
The patent replaces the mechanical/physical external color analyzer with a computational/software-based solution. By using algorithmic color space transformation and matrix calculations, the system achieves accurate color measurement and adjustment without requiring physical measurement instruments, thereby reducing device complexity while maintaining precision.
Data Source
AI summary
A display device includes a storage unit, a display unit and a processing unit. The storage unit stores a color parameter under a color space. The display unit displays an adjusting interface including a reference color block and a plurality of offset color blocks. When a target offset color block of the offset color blocks is selected, the processing unit updates a color coordinate of the reference color block by a color coordinate of the target offset color block and updates a color coordinate of each of the offset color blocks by a color coordinate of the updated reference color block and an offset value. The processing unit obtains a color transformation matrix according to the color coordinate of the reference color block, the color coordinate of the target offset color block and the color parameter. The processing unit adjusts three output percentages of RGB by the color transformation matrix.