Liquid Crystal Panel Grayscale Optimization for Color Shift Reduction
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Solution Overview
Problem
Existing liquid crystal displays (LCDs) with wide view angle technology face color shift issues when viewed from the side, and there is a challenge in setting optimal grayscale values for main and sub pixels to minimize this effect while maintaining image quality.
Innovation Solution
A method is developed to set grayscale values for liquid crystal panels by calculating actual and theoretical brightness values under different viewing angles, optimizing the input grayscale values for main and sub pixels to reduce color shift and improve display quality, using a method that involves dividing actual brightness values based on area ratios and applying gamma correction to achieve gamma(γ)=2.2 curves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If 2D1G technology is adopted to divide each pixel unit into main pixel and sub pixel with different areas, then color shift phenomenon is reduced when viewing from side and squinting, but the problem of setting optimal grayscale values for main pixel and sub pixel remains unresolved
Solution Approach 1:
The patent applies parameter changes by systematically adjusting grayscale values for main pixels and sub pixels based on their area ratios. Different grayscale parameters are assigned to main and sub pixels to optimize display performance at various viewing angles, directly resolving the technical contradiction by transforming the grayscale value setting into a controlled variable that compensates for the structural asymmetry of 2D1G technology
Solution Approach 2:
The patent implements feedback mechanisms by measuring actual display effects at different viewing angles and using this information to iteratively optimize grayscale value assignments. The system continuously adjusts grayscale parameters based on observed color shift and brightness uniformity, creating a closed-loop control that resolves the contradiction between reducing color shift and simplifying grayscale setting
2Object-affected harmful factors
If different grayscale values are input to main pixel and sub pixel to generate different display brightness and squint view brightness, then color shift is reduced, but display brightness uniformity deteriorates
Solution Approach 1:
The patent applies local quality by assigning different grayscale values to main pixels and sub pixels based on their respective area ratios and positional characteristics. Each pixel type receives customized grayscale parameters tailored to its specific role in the pixel unit, enabling localized brightness adjustment that compensates for area differences while maintaining overall display uniformity and reducing color shift
Solution Approach 2:
The patent systematically changes grayscale parameters for main and sub pixels to achieve optimal display performance. By dynamically adjusting these parameters based on area ratios and viewing angle requirements, the system resolves the contradiction between reducing color shift through differential grayscale input and maintaining brightness uniformity across the display
Data Source
AI summary
A method of setting a grayscale value of a liquid crystal panel, each pixel unit in the liquid crystal panel comprises a main pixel M and a sub pixel S, having an area ratio between the main and sub pixels. The method includes acquiring an actual brightness value of each grayscale of the liquid crystal panel under a front view and a squint angle; dividing the actual brightness values based on the area ratio, and establishing a relationship between the grayscale and the actual brightness; calculating a theoretical brightness value of each grayscale; setting a grayscale combination input to the main pixel M and the sub pixel S, so a sum of difference values between actual and theoretical brightness would be the smallest under the front and squint angles; repeating the previous step for all grayscales of the liquid crystal panel. A liquid crystal display is also disclosed.