RGBW Panel White Subpixel Aberration Compensation
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Solution Overview
Problem
RGBW panels exhibit color aberrations between actual white subpixels and standard white color coordinate points under sRGB, leading to image normalization issues.
Innovation Solution
A method of RGBW compensation is provided, which analyzes color coordinates of subpixels on the RGBW panel, divides the triangle formed by red, green, and blue subpixels into three regions based on the white subpixel's color coordinate, and applies a normalized proportion to calibrate the white subpixel's luminance, thereby compensating for aberrations and normalizing images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If white subpixel is added to RGB foundation to form RGBW 4K, then light transmittance and luminance of panel increase, but color aberrations occur between actual white subpixels and standard white color coordinate points
Solution Approach 1:
The patent applies parameter changes by modifying the color coordinates of white subpixels through mathematical transformation. The actual color coordinates (xs, ys) are converted to standard sRGB coordinates (xd, yd) using a transformation matrix that adjusts the parameters based on the measured color aberrations, thereby resolving the color accuracy issue while maintaining the luminance benefits of the white subpixel
Solution Approach 2:
The patent implements local quality by applying different compensation strategies to different color regions. The color space is divided into multiple triangular regions, and each region receives customized color coordinate transformation parameters. This allows the system to maintain high color accuracy in each local region while preserving the overall luminance enhancement provided by the white subpixel
2Productivity
If traditional RGB signal switching algorithms are applied to RGBW panels, then signal conversion is achieved, but color coordinate aberrations of white subpixels are not corrected
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing compensation parameters for different color regions before actual image display. The color coordinate transformation parameters are determined in advance based on measured white subpixel aberrations, allowing rapid signal conversion without real-time calculation delays while ensuring color accuracy is maintained throughout the conversion process
Data Source
AI summary
Disclosed is a method of RGBW compensation based on color aberrations of white subpixel and an apparatus thereof: when aberrations exist between a color coordinate point Ws of white subpixel and a standard white color coordinate point Wd under sRGB, analyzing color coordinates of every subpixel on the RGBW panel, and then dividing a triangle with vertices points Rs, Gs and Bs into three triangle regions based on Ws as the center point; based on ranges of the three triangle regions, a triangle region where Wd is located is confirmed; a first data is calibrated by performing compensating the white subpixel corresponding by the center point Ws via a predetermined normalized proportion through two subpixels corresponding to the other two points within the triangle region surrounding and locating Wd. Through the aforementioned manner, the present invention is capable of calibrating aberrations of white subpixels in order to normalize images of RGBW panels.