VA Display Panel 12-Domain Pixel Structure Side View Color Shift
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Solution Overview
Problem
Conventional VA-type liquid crystal display panels exhibit significant color shift and whitening issues when viewed from the side, leading to a subpar display effect compared to fringe field switching or in-plane switching types.
Innovation Solution
A display panel with a 12-domain pixel structure is achieved by employing three gamma curves and a 4-domain pixel structure, where each color pixel consists of three sub-pixels with different grayscale determinations using separate controllers and gamma curves, allowing for improved grayscale control and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical alignment technology is used to form multi-domain alignment in VA type liquid crystal display panels, then contrast ratio and response time are improved, but side view effect deteriorates with significant color shift and whitening
Solution Approach 1:
The pixel is divided into multiple sub-pixels (first sub-pixel, second sub-pixel, third sub-pixel) with different alignment directions. Each sub-pixel is controlled by separate controllers that apply different gamma curves to achieve uniform color output across different viewing angles, thereby resolving the color shift and whitening issues in side views while maintaining the high contrast ratio and response time benefits of VA type panels.
2Reliability
If conventional VA type liquid crystal display panels are used, then high contrast ratio is achieved, but color shift in side view becomes significant
Solution Approach 1:
Different sub-pixels within the same pixel are assigned different alignment directions and controlled by separate controllers with dedicated gamma curves. This local differentiation ensures that each sub-pixel contributes to uniform color output in its specific orientation, thereby eliminating color shift in side views while preserving the high contrast ratio characteristic of VA type panels.
3Reliability
If multi-domain alignment is implemented, then optical performance is improved, but display uniformity across viewing angles deteriorates
Solution Approach 1:
The patent employs dynamic gamma curve adjustment for each sub-pixel controller based on the specific alignment direction and viewing angle requirements. By dynamically adjusting the gamma curves for different sub-pixels, the system maintains display uniformity across various viewing angles while preserving the optical performance benefits of multi-domain alignment.
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
This configuration significantly reduces color shift and improves the display effect in side views by approximating the gamma curve in normal views, enhancing the overall display performance.
Implementation Method 1
control rotations of liquid crystal molecules of the liquid crystal layer by applying driving voltages on two glass substrates
Implementation Method 2
refract light from the backlight module to thereby produce a picture
Data Source
AI summary
A display panel, a display device and a driving method for a display panel are provided. The display panel includes multiple pixel units and a display control unit. Each of the pixel units includes a first color pixel, a second color pixel and a third color pixel. The first color pixel, the second color pixel and the third color pixel each include a first sub-pixel, a second sub-pixel and a third sub-pixel. The display control unit includes a first controller, a second controller and a third controller. By means of combining three kinds of gramma curves e.g., first through third gamma curves and taking a 4-domain pixel structure as a basis, a display effect based on a 12-domain pixel structure can be realized, so that the color shift problem in side view of the display panel can be significantly improved.