Color Gamut Conversion Device for OLED Displays
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Solution Overview
Problem
Organic light emitting displays with unique color gamuts fail to accurately reproduce images generated in the D65 sRGB standard due to differences in color gamut and white color coordinates, leading to incorrect color display and increased power consumption.
Innovation Solution
A color gamut conversion device and method that converts RGB values into R''G''B'' values using a lookup table (LUT) generated from a second reference conversion matrix, which applies a low power corrected value to the first reference conversion matrix, ensuring accurate color representation and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standard D65 sRGB color gamut is used for image storage and reproduction, then compatibility and standardization are improved, but color accuracy deteriorates when displayed on organic light emitting displays with unique color gamuts
Solution Approach 1:
The patent applies parameter changes by modifying the color gamut parameters through conversion matrices. It transforms image data from the standard D65 sRGB color gamut parameters to the specific color gamut parameters of the organic light emitting display, thereby maintaining compatibility while achieving color accuracy through parameter transformation
Solution Approach 2:
The patent uses conversion matrices and lookup tables as intermediaries between the standard color gamut and the display-specific color gamut. These intermediaries transform the color data to bridge the gap between standardized storage and display-specific reproduction, resolving the contradiction between compatibility and color accuracy
2Measurement precision
If the color gamut of the display is made wider to improve color reproduction capability, then color gamut coverage is improved, but power consumption increases
Solution Approach 1:
The patent applies parameter changes by introducing a low power corrected value that modifies the conversion matrix parameters. This corrected value adjusts the color transformation to reduce power consumption while maintaining acceptable color gamut coverage, balancing the contradiction between color reproduction capability and energy usage
Solution Approach 2:
The patent uses partial action by applying a correction factor (low power corrected value) that partially adjusts the color gamut transformation. Instead of fully optimizing for color gamut coverage, it applies a moderated correction that achieves acceptable color reproduction with reduced power consumption
3Measurement precision
If color correction is applied to improve color accuracy on displays with unique color gamuts, then color accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing conversion matrices and lookup tables that encapsulate the color gamut transformation. This preliminary preparation simplifies the actual conversion process during image display, reducing real-time computational complexity while maintaining color accuracy
Solution Approach 2:
The patent uses copying by creating lookup tables that store pre-computed color transformation data. Instead of performing complex real-time calculations, the system copies and applies pre-prepared conversion values, simplifying the device complexity while achieving accurate color reproduction
Data Source
AI summary
A color gamut conversion device includes: a target color coordinate converter configured to convert each RGB value of red (R), green (G), blue (B), cyan (C), magenta (M), yellow (Y), and white (W) of a target color coordinate into a tristimulus value XYZ; a reference conversion matrix generator configured to generate a first reference conversion matrix for converting each tristimulus value XYZ into an R′G′B′ value according to a color gamut of a reference display; a low power corrected value calculator configured to calculate a low power corrected value for correcting the R′G′B′ value; a lookup table (LUT) generator configured to generate an LUT including an R″G″B″ value corresponding to each RGB value by using a second reference conversion matrix that the low power corrected value is applied to the first reference conversion matrix; and a color gamut converter configured to convert image data of the RGB values into image data of the R″G″B″ values using the LUT.