Display Panel Pixel Electrode Spacing for Color Shift Reduction
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Solution Overview
Problem
LCD panels with wide viewing angles suffer from color shift and inadequate color saturation, particularly at middle-low gray levels, leading to unnatural image views when viewed from the side compared to the front.
Innovation Solution
The design of display panels with pixel structures featuring sub-pixels having pixel electrodes with specific spacing and line-width ratios in main and minor regions, which are adjusted to mitigate color shift issues, enhancing display quality by optimizing the alignment and brightness distribution across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-domain vertical alignment LCD panel is used to achieve wide viewing angle, then viewing angle is improved, but color shift and color saturation deteriorate
Solution Approach 1:
The pixel electrode is divided into multiple regions (first region, second region, third region) with different line-widths and spacings. Each region has locally optimized geometric parameters to control liquid crystal molecule alignment in specific viewing directions, thereby achieving different alignment domains within a single pixel to resolve the color shift problem while maintaining wide viewing angle.
2Ease of manufacture
If conventional pixel electrode design is used, then manufacturing is simple, but color shift problem in side view image is severe
Solution Approach 1:
The pixel electrode is segmented into multiple functional regions (first, second, and third regions) with distinct line-width and spacing characteristics. This segmentation allows each region to address specific viewing angle requirements independently, mitigating color shift in side-view images while maintaining compatibility with conventional fabrication processes.
Solution Approach 2:
The invention changes the geometric parameters (line-width and spacing) of the pixel electrode across different regions. By varying these parameters, the liquid crystal molecule alignment characteristics are modified to reduce color shift effects in side-view images while preserving front-view quality and manufacturing feasibility.
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
The adjusted pixel electrode spacing and line-width ratios effectively reduce color shift problems in side-view images, resulting in improved display quality by maintaining color accuracy and saturation across different viewing angles.
Implementation Method 1
an alignment pattern is designed to divide the liquid crystal molecules of a same pixel region into a plurality of different alignment domains to achieve a wide viewing angle display effect
Data Source
AI summary
A display panel includes a pair of substrates, a pixel structure, and a display medium layer disposed between the pair of substrates. The pixel structure is disposed on one of the substrates, and includes first and second sub-pixels. The first sub-pixel includes a first pixel electrode, wherein the first pixel electrode has a first spacing in a first main region and has a second spacing in a first minor region, wherein the second spacing is smaller than the first spacing. The second sub-pixel includes a second pixel electrode, wherein the second pixel electrode has a third spacing in a second main region and has a fourth spacing in a second minor region, wherein the fourth spacing is larger than or equal to the third spacing, and wherein the first spacing is larger than the third spacing.