Liquid Crystal Panel Domain Arrangement for Viewing Angle Correction
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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 correction techniques struggle to suppress effectively.
Innovation Solution
A liquid crystal panel design where one pixel is divided into multiple alignment regions with specific domain arrangements and fine slits in the pixel electrodes, ensuring identical domain arrays in consecutive rows and varying domain orders relative to gate lines to minimize the impact of electric fields, combined with a manufacturing method using photolithography to form these slits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If alignment division technique is used to improve viewing angle characteristic, then viewing angle characteristic is improved, but display unevenness with viewing angle dependency occurs
Solution Approach 1:
The pixel electrode is divided into multiple regions corresponding to different alignment domains, with each region containing fine slits. This segmentation allows different domains to have optimized slit patterns that compensate for viewing angle-dependent display unevenness while maintaining the alignment division structure.
Solution Approach 2:
Different regions of the pixel electrode are provided with fine slits having different orientations matched to the alignment directions of respective domains. This local differentiation ensures that each domain's liquid crystal molecules are properly controlled according to its specific alignment direction, reducing display unevenness across different viewing angles.
2Manufacturing precision
If fine slits are provided in pixel electrode to control liquid crystal alignment, then alignment precision is improved, but electric field influence from gate line causes display unevenness
Solution Approach 1:
Fine slits are selectively provided in different regions of the pixel electrode corresponding to different alignment domains, with each region's slits oriented to match its domain's alignment direction. This localized approach maintains precise alignment control while distributing the electric field influence uniformly across domains.
Solution Approach 2:
The domain arrangement ensures that domains experiencing different electric field influences from the gate line are distributed uniformly. By alternating domain patterns in adjacent rows, the patent creates an equipotential-like effect where the average electric field influence is equalized across all domains, preventing systematic display unevenness.
3Adaptability or versatility
If domains are arranged with specific orientation to improve viewing angle, then viewing angle characteristic is improved, but domain arrangement complexity increases
Solution Approach 1:
The pixel electrode is divided into multiple regions corresponding to different alignment domains, with each region containing fine slits. This segmentation allows different domains to have optimized slit patterns that compensate for viewing angle-dependent display unevenness while maintaining the alignment division structure.
Solution Approach 2:
The domain arrangement follows a periodic pattern where adjacent rows have different domain orders, creating a systematic alternation that simplifies the overall design while achieving uniform electric field influence distribution and improved viewing angle 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
The solution effectively suppresses display unevenness caused by viewing angle dependency, improving the liquid crystal panel's display quality and reducing the occurrence of dark lines, thereby enhancing the panel's performance and usability in high-definition applications.
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
Implementation Method 3
forming the fine slits by photolithography, the photolithography including irradiating a photosensitive resin formed on a conductive film with light through a mask in which a pattern corresponding to the fine slits is formed
Data Source
AI summary
A liquid crystal panel includes: a first substrate including multiple pixel electrodes, and multiple gate lines; a liquid crystal layer; and a second substrate including a common electrode. In at least 30 pixels consecutive in a row direction, arrays of domains are identical. The gate lines extend through a region between rows of the display unit regions. 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. The first domain and the fourth domain are located between the second domain and the third domain in a domain arrangement order in the display unit region located in an (n+1)th row. Each of the pixel electrodes is provided with multiple fine slits parallel to the alignment vectors of the respective domains.