Liquid Crystal Panel Slit Design for Viewing Angle Uniformity
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Solution Overview
Problem
Liquid crystal panels with alignment division techniques suffer from display unevenness due to viewing angle dependency, which conventional methods struggle to suppress effectively.
Innovation Solution
The liquid crystal panel design includes a first substrate with multiple pixel electrodes and gate lines, and a second substrate with a common electrode, featuring domains with different alignment vectors and fine slits that reduce the influence of the electric field from the gate line, with the fine slits' distance from the pixel electrode ends optimized to minimize display unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If alignment division technique is used to improve viewing angle characteristics, then viewing angle characteristic is improved, but display unevenness with viewing angle dependency is generated
Solution Approach 1:
The patent applies local quality by creating different alignment conditions in different regions of the pixel electrode. Specifically, the pixel electrode is divided into multiple domains with different alignment directions (first domain with first alignment direction, second domain with second alignment direction, etc.), allowing each region to have optimized properties for viewing angle characteristics while managing display unevenness through localized control
Solution Approach 2:
The patent segments the pixel electrode into multiple distinct domains, each with different alignment vectors. This segmentation allows independent control of alignment in each domain, enabling the liquid crystal molecules to be oriented differently in various regions to improve viewing angle characteristics while reducing display unevenness through controlled domain boundaries
2Reliability
If fine slits are provided in pixel electrode to control electric field, then electric field influence is reduced, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary structure (the specific arrangement of fine slits in the pixel electrode) that mediates between the gate line electric field and the liquid crystal layer. The slits act as a filtering mechanism that allows controlled electric field penetration, reducing unwanted electric field influence on liquid crystal alignment while maintaining necessary field control for display operation
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 suppresses display unevenness by uniformly dispersing the electric field influence across domains, improving viewing angle characteristics and maintaining high transmittance, suitable for high-definition and large-sized liquid crystal displays.
Implementation Method 1
the first alignment film and the second alignment film having been subjected to an alignment treatment each include multiple domains with different alignment vectors
Implementation Method 2
voltage is applied to the liquid crystal composition to change alignment of liquid crystal molecules, thereby controlling an amount of light transmitted through the liquid crystal panel
Data Source
AI summary
A liquid crystal panel includes: a first substrate including multiple pixel electrodes; a liquid crystal layer; and a second substrate. The domains in the display unit region located in an nth row are arranged in an order of a first domain, a second domain, a third domain, and a fourth domain. Each of the pixel electrodes is provided with multiple fine slits parallel to the alignment vectors of the respective domains. Each of the pixel electrodes includes a region where the fine slits do not exist, at both ends of the pixel electrode parallel to the row direction and at one or both of ends of the pixel electrode parallel to the column direction. A portion having a largest width of the region where the fine slits do not exist is included in one or both of the ends of the pixel electrode parallel to the row direction.