Display Sub-Pixel Image Processing for Color Shift Reduction
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Solution Overview
Problem
High-resolution displays face issues with brightness and power consumption due to decreased visibility of red, green, and blue sub-pixels, and suffer from color shift when viewed from different angles due to varying liquid crystal refraction rates.
Innovation Solution
An image processing method that transforms three-color image data into four-color data, using a kernel filter and characteristic tables to adjust sub-pixel brightness and compensate for color shift, ensuring consistent image quality across viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of displays is increased, then the image quality and fine detail are improved, but the visibility rates of the red, green, and blue sub pixels are decreased, resulting in reduced brightness and increased power consumption
Solution Approach 1:
The pixel is divided into four sub pixels with different colors (red, green, blue, and cyan) instead of the traditional three sub pixels. This segmentation allows each sub pixel to have a larger area, improving visibility and brightness while maintaining high resolution image quality
Solution Approach 2:
Different sub pixels within the same pixel are assigned different colors and areas based on their specific functions. The cyan sub pixel has a larger area to compensate for the reduced visibility of individual sub pixels, while the red, green, and blue sub pixels maintain their original sizes for color accuracy
2Measurement precision
If the resolution of displays is increased, then the image quality and fine detail are improved, but the power consumption is increased to maintain brightness
Solution Approach 1:
By dividing the pixel into four sub pixels including a cyan sub pixel with larger area, the display achieves better brightness and visibility without needing to increase overall power consumption, as the larger cyan sub pixel compensates for the high resolution requirement
3Illumination intensity
If white sub pixels are introduced to improve brightness, then the brightness contrast and power consumption are improved, but the color shift issue occurs when observed from different angles
Solution Approach 1:
Instead of using white sub pixels that cause color shift, the patent uses four colored sub pixels (red, green, blue, and cyan) with different areas. Each sub pixel maintains its color purity, preventing color shift when viewed from different angles while still achieving improved brightness through the larger cyan sub pixel area
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances brightness and reduces power consumption by optimizing sub-pixel visibility and mitigates color shift issues, providing improved image quality and uniformity regardless of the viewing angle.
Implementation Method 1
each of the users may observe the images with different qualities due to the different refraction rates of the liquid crystal when observed from different angles
Data Source
AI summary
An image processing method of a display includes transforming three color image data to four color image data, passing the four color image data through a kernel filter to generate original data corresponding to a first sub pixel and a second sub pixel, and transforming original data of each sub pixel to generate display data of the sub pixel. The original data of the first sub pixel is the same as the original data of the second sub pixel. The brightness of the display data of the first sub pixel is substaintially greater than the original data of the first sub pixel. The brightness of the display data of the second sub pixel is substaintially smaller than the original data of the second sub pixel.