Liquid Crystal Display Pixel Electrode Segmentation for Texture Reduction
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Solution Overview
Problem
Liquid crystal displays, particularly in the Patternless VA mode, face issues with reduced light transmittance due to microelectrode textures and decreased response speed due to random motions and residual images from disclination.
Innovation Solution
A liquid crystal display design featuring a pixel electrode with microelectrodes arranged in domains connected by a narrow connecting pattern, where each microelectrode is divided into sections by notches or varying widths to control liquid crystal alignment and reduce texture formation, and a common electrode without patterning to prevent misalignment and static electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If microelectrodes are arranged in Patternless VA mode to achieve wide viewing angle, then viewing angle is improved, but light transmittance is reduced due to textures generated where microelectrodes cross each other
Solution Approach 1:
The pixel electrode is divided into multiple domains, each containing a set of parallel microelectrodes. This segmentation prevents microelectrodes from crossing each other while maintaining the wide viewing angle characteristic of VA mode, thereby eliminating texture generation and improving light transmittance.
Solution Approach 2:
Different regions (domains) of the pixel electrode are designed with specific local characteristics - parallel microelectrode arrangements in each domain create localized electric fields that control liquid crystal orientation without causing cross-domain textures, optimizing both viewing angle and light transmittance.
2Duration of action of moving object
If microelectrodes are arranged in Patternless VA mode to achieve wide viewing angle, then viewing angle is improved, but response speed is decreased due to random motions and immediate residual images from disclination
Solution Approach 1:
By segmenting the pixel electrode into domains with parallel microelectrode sets, the invention eliminates the disclination defects that cause random liquid crystal motions in Patternless VA mode. This segmentation approach maintains wide viewing angle while significantly improving response speed by preventing the source of disclination-related slow response.
3Duration of action of moving object
If gaps are formed in electric field generating electrodes to achieve wide viewing angle in vertical alignment mode, then viewing angle is improved, but device complexity increases
Solution Approach 1:
Instead of forming gaps in the electrode pattern, the invention segments the pixel electrode into multiple domains with parallel microelectrode sets. This approach achieves wide viewing angle through controlled electric field distribution without requiring gaps, thereby simplifying the electrode structure while maintaining the desired viewing characteristics.
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 design enhances light transmittance by minimizing texture formation and improves response speed by controlling liquid crystal alignment, reducing random motions and residual images.
Implementation Method 1
a vertical alignment mode liquid crystal display, in which the major axis of the liquid crystals is arranged perpendicular to the upper and lower substrates in the absence of an electric field
Implementation Method 2
An electric field is generated in the liquid crystal layer by applying voltages to the electric field generating electrodes to determine the alignment of the liquid crystals in the liquid crystal layer and display images by controlling polarization of incident light
Implementation Method 3
display images by controlling polarization of incident light
Implementation Method 4
The connecting pattern is formed by connecting the end of microelectrodes of each domain to the side of microelectrodes of adjacent domains
Data Source
AI summary
A liquid crystal display includes a first insulating substrate, a pixel electrode disposed on the first insulating substrate, a second insulating substrate facing the first insulating substrate, a common electrode disposed on the second insulating substrate without patterning, and a liquid crystal layer interposed between the first and second insulating substrates. The pixel electrode is divided into a plurality of domains that include a plurality of microelectrodes arranged substantially parallel to each other and are connected through a connecting pattern. The connecting pattern is formed by connecting the end of microelectrodes of each domain to the side of microelectrodes of adjacent domains.