MVA Panel Viewing Angle Compensation via Gamma Lookup
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Solution Overview
Problem
Liquid crystal display panels, particularly VA panels, suffer from poor display effects at side viewing angles due to picture whitening, which existing multi-domain structures like MVA panels inadequately address, limiting user experience when viewing from multiple angles.
Innovation Solution
A viewing angle compensation method and apparatus that adjusts gray-scale values of subpixels on red, green, and blue channels by using a visual compensation lookup table, dividing pixel points into groups, and applying different gamma curves to minimize picture whitening and enhance visual angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a VA liquid crystal panel is used to achieve lightness and low power consumption, then energy efficiency is improved, but side viewing angle display quality deteriorates due to picture whitening
Solution Approach 1:
The panel is divided into multiple domains (4-domain or 8-domain structure) with different liquid crystal alignment directions. Each domain is segmented to control light leakage in specific viewing directions, thereby improving side viewing angle display quality while maintaining the VA panel's energy efficiency advantages
Solution Approach 2:
Different regions of the panel have different liquid crystal alignment characteristics tailored to specific viewing angles. The multi-domain structure creates local quality variations where each domain optimizes performance for particular viewing directions, reducing picture whitening at side angles
2Adaptability or versatility
If a multi-domain structure (MVA) is adopted to improve side viewing angle display, then viewing angle performance is improved, but picture whitening problem persists at large side viewing angles
Solution Approach 1:
The patent introduces a dynamic compensation method that adjusts gray-scale values in real-time based on the actual viewing angle. This dynamic adjustment compensates for the static limitations of multi-domain structures, reducing picture whitening at large side viewing angles by adaptively modifying liquid crystal alignment responses
Solution Approach 2:
The patent changes the gray-scale parameters of liquid crystal driving signals based on detected viewing angles. By dynamically adjusting these parameters, the system compensates for the fixed geometric limitations of multi-domain structures, maintaining display quality across wider viewing angles
3Manufacturing precision
If gray-scale values are adjusted to compensate viewing angle, then side viewing angle display quality is improved, but additional processing complexity is introduced
Solution Approach 1:
The patent implements a feedback mechanism where the viewing angle is detected and this information is used to adjust the gray-scale values. The feedback loop continuously monitors viewing conditions and modifies driving parameters accordingly, achieving dynamic compensation without requiring complex hardware modifications
Data Source
AI summary
The present disclosure discloses a viewing angle compensation method and apparatus for a display panel, and the display panel, and relates to the technical field of liquid crystal displaying. The purpose of increasing a visual angle of an MVA liquid crystal panel can be achieved, and for a whitening phenomenon of a screen watched at a side viewing angle, a better improving effect can be given. A main technical solution of the present disclosure includes: receiving to-be-processed image data, the image data including pixel points formed in a plurality of rows and a plurality of columns, and each pixel point having different subpixels on red, green and blue three-color channels; adjusting current gray-scale values of the subpixels by looking up a preset visual compensation lookup table to obtain adjusted gray-scale values, the preset visual compensation lookup table including two corresponding gamma curves, and the two corresponding gamma curves being used for describing corresponding adjustable ranges of the gray-scale values; and acquiring first target image data as output target image data according to the adjusted gray-scale values corresponding to the subpixels.