Liquid Crystal Display Pixel Electrode Point Symmetry
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Solution Overview
Problem
Liquid crystal displays experience significant deviations in left/right and upper/lower viewing angles due to the shape of pixel electrodes, which affects image quality and display performance.
Innovation Solution
The implementation of a matrix-form liquid crystal display with specific pixel electrode arrangements, where each pixel is part of either a first or second domain, defined by the orientation of its slits, and these domains are arranged in a point symmetry relationship to minimize viewing angle deviations. This includes specific configurations of pixel electrodes in first and second pixel portions, with certain electrodes defining different domains based on slit orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pixel electrode shapes are used, then the display structure is simple, but the left/right and upper/lower viewing angles deviate significantly
Solution Approach 1:
The display is divided into multiple pixel portions (first pixel portion with 5 pixels and second pixel portion with 6 pixels) arranged in a matrix. Each pixel portion is further segmented into different domains (first domain and second domain) based on pixel electrode configurations. This segmentation allows different viewing angle characteristics to be optimized in different regions, resolving the contradiction between simple structure and viewing angle consistency.
Solution Approach 2:
The patent introduces asymmetric pixel electrode arrangements where certain pixels have different orientations or configurations compared to others. Specifically, pixels are arranged to define different domains with asymmetric characteristics that compensate for each other, achieving overall viewing angle consistency while maintaining a relatively simple overall structure.
2Reliability
If pixel electrodes are arranged to define different domains, then viewing angle deviation is minimized, but the domain differentiation complexity increases
Solution Approach 1:
Different pixel portions are assigned different domain characteristics locally. The first pixel portion has pixels defining first and second domains, while the second pixel portion has pixels defining first, second, third, and fourth domains. This local differentiation allows each region to contribute to overall viewing angle consistency without requiring complex global redesign, thus managing the complexity through localized optimization.
Solution Approach 2:
Multiple pixel portions are combined into a single display structure, with each portion contributing different domain characteristics. The first and second pixel portions are merged such that their combined effect minimizes viewing angle deviation. This merging approach distributes the complexity across multiple simpler units rather than requiring one complex unified structure.
Data Source
AI summary
A liquid crystal display includes: a plurality of pixels arranged in a matrix form with m rows and n columns, where the pixels define a plurality of first and second pixel portions including parts of the pixels. Pixel electrodes of two of the pixels of the first pixel portion define a first domain, and pixel electrodes of the remaining three of the pixels define a second domain, and pixel electrodes of two of the pixels of the second pixel portion include the first domain, and pixel electrodes of the remaining three of the pixels include the second domain, and the first and second domains in the first pixel portion and the first and second domains in the second pixel portion are in a point symmetry relationship.