RGBW Display Panel Driving Method Using YCbCr Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Four-primary color display apparatuses face limitations in visual recognition and color purity due to linear white pixel value calculation and hardware-induced intensity decreases during RGB to RGBW conversion, which do not adequately consider human visual characteristics.
Innovation Solution
A method and apparatus for driving a display panel with RGB and W sub-pixels by converting RGB data into YCbCr data, applying a contrast enhancement algorithm to determine the W value, and calculating RGB values using weighted Cb and Cr values, enhancing color purity and contrast without hue distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If linear method is used to acquire white pixel value, then conversion process is simple, but visual recognition characteristic is not sufficiently considered and color purity decreases
Solution Approach 1:
The patent changes the calculation parameters for white pixel values from linear to non-linear functions. Specifically, it uses minimum and maximum RGB values combined with non-linear weighting factors to calculate W pixel values, thereby improving color purity and visual recognition while maintaining computational feasibility.
Solution Approach 2:
The patent introduces dynamic adjustment of white pixel values based on local image characteristics. By calculating W values differently for different pixel locations and using adaptive weighting, the system dynamically optimizes color purity and contrast enhancement rather than applying a static linear transformation.
2Adaptability or versatility
If RGB image is converted to RGBW image, then color gamut is extended, but intensities of RGB pixels decrease and color purities decrease
Solution Approach 1:
The patent employs non-linear parameter transformations during RGB to RGBW conversion. By using minimum and maximum RGB values with non-linear weighting to calculate W values, the system compensates for the intensity loss in RGB pixels, maintaining their brightness while extending the color gamut through the addition of white subpixels.
Solution Approach 2:
The patent introduces YCbCr color space as an intermediary for the conversion process. By transforming RGB to YCbCr and then calculating W values from the luminance (Y) and chrominance (CbCr) components, the system achieves better color gamut extension while preserving RGB pixel intensities through the intermediate representation.
3Ease of manufacture
If existing conversion method is used, then implementation is straightforward, but contrast and visual recognition are insufficient
Solution Approach 1:
The patent applies non-linear parameter changes including minimum and maximum value calculations, adaptive weighting factors, and non-linear functions to enhance contrast. These parameter transformations improve visual recognition accuracy by emphasizing important image features while maintaining reasonable computational complexity for practical implementation.
Data Source
AI summary
A method of driving a display panel including a plurality of pixels including a red (R), green (G), blue (B), and white (W) sub-pixels is provided. The method includes receiving image data, converting RGB data included in the image data into RGBW data, and driving the display panel based on the converted RGBW data. The converting includes converting the RGB data into YCbCr data and determining a W value of the RGBW data based on a Y value of the converted YCbCr data.