Bent Edge Slits in LCD Counter Electrodes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display apparatuses in transverse electric field modes suffer from disclination and decreased contrast ratio due to external pressure causing slit edge irregularities, leading to light leakage and display variations.
Innovation Solution
The implementation of a liquid crystal display apparatus with pixel and counter electrodes featuring short slits or electrodes with bent edges to prevent disclination and minimize light leakage, while long slits without bent edges reduce light leakage and maintain contrast ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bent edge portions are provided in all slits to prevent disclination, then disclination is effectively prevented, but light leakage increases and contrast ratio decreases
Solution Approach 1:
The patent applies bent edge portions only to specific slits (first slits) that are more prone to disclination, while leaving other slits (second slits) with straight edges. This localized application prevents disclination where needed while minimizing light leakage across the entire electrode, thereby resolving the contradiction between disclination prevention and contrast ratio maintenance.
2Reliability
If bent edge portions are provided in slits to prevent disclination, then display stability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent simplifies the electrode structure by providing bent edge portions only in specific first slits rather than all slits. This selective approach maintains display stability in critical areas while reducing the overall structural complexity and manufacturing difficulty compared to applying bent edges uniformly across all slits.
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 effectively prevents disclination and minimizes the decrease in contrast ratio by controlling light leakage, enhancing display stability and image quality.
Implementation Method 1
a liquid crystal is driven by a lateral fringe electric field generated between these two electrodes
Implementation Method 2
both of two electrodes for generating an electric field that is used to drive the liquid crystal
Data Source
AI summary
Provided is a liquid crystal display apparatus capable of preventing a disclination and minimizing a decrease in contrast ratio caused by leakage of light. A counter electrode formed on an array substrate has a plurality of slits within one pixel. The slit which is relatively short has bent edge portions in which edges of the slit are bent. The slits which are relatively long do not have bent edges.