Liquid Crystal Panel Central Slit Alignment
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Solution Overview
Problem
Liquid crystal panels with alignment division techniques suffer from residual alignment disorder when pressed, leading to display defects due to discontinuous alignment azimuths between domains, resulting in dark regions that do not transmit light.
Innovation Solution
Incorporating a central slit that connects fine slits between domains, ensuring the liquid crystal alignment direction matches between the alignment film and the electric field, thereby preventing residual alignment disorder after pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If alignment division technique is used to improve viewing angle characteristics, then viewing angle characteristics are improved, but alignment disorder occurs at domain boundaries when pressed
Solution Approach 1:
The pixel electrode is divided into multiple domains with different alignment directions to improve viewing angle characteristics. Each domain has a specific alignment azimuth, and the segmentation allows the liquid crystal panel to display images with better viewing angles from different directions.
Solution Approach 2:
A central slit is introduced as an intermediary structure at the boundary between domains. This central slit connects the fine slits of adjacent domains and serves as a mediator to ensure continuous alignment change. The central slit prevents abrupt alignment discontinuities at domain boundaries, thereby eliminating alignment disorder and dark lines when the panel is pressed.
2Illumination intensity
If central slit is formed to reduce dark line between domains, then dark line is reduced, but residual alignment disorder remains after pressing
Solution Approach 1:
The central slit acts as an intermediary structure that connects the fine slits of adjacent domains. This connection ensures that the alignment direction changes continuously from one domain to another, preventing abrupt discontinuities. When the panel is pressed, the continuous alignment change provided by the central slit prevents residual alignment disorder, allowing the liquid crystal molecules to return to their original state.
Solution Approach 2:
The central slit is pre-formed in the pixel electrode structure to establish a continuous alignment path before any pressing occurs. This preliminary structural arrangement ensures that when pressure is applied, the alignment can follow the continuous path defined by the central slit, preventing the formation of residual alignment disorder and facilitating recovery.
3Shape
If alignment azimuths are discontinuous at domain boundaries, then domain structure is formed, but dark regions appear that do not transmit light
Solution Approach 1:
The pixel electrode is segmented into multiple domains, each with a specific alignment azimuth. This segmentation creates distinct domains that improve viewing angle characteristics while maintaining the overall pixel structure.
Solution Approach 2:
The central slit serves as an intermediary structure at the domain boundaries. It connects the fine slits of adjacent domains and provides a continuous alignment path, ensuring that light can transmit smoothly across domain boundaries without forming dark regions.
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 eliminates residual alignment disorder and dark lines, enhancing display quality by ensuring continuous alignment change at domain boundaries, thus improving light transmittance and reducing display unevenness.
Implementation Method 1
a first substrate provided with pixel electrodes and a first alignment film; a liquid crystal layer containing liquid crystal molecules; and a second substrate provided with a common electrode and a second alignment film, the first alignment film and the second alignment film having been subjected to an alignment treatment such that pixels each include domains with different alignment vectors
Implementation Method 2
applies voltage to the liquid crystal composition to change the alignment of liquid crystal molecules, thereby controlling the amount of light passing through the liquid crystal panel
Data Source
AI summary
A liquid crystal panel including: a first substrate with a first alignment film; a liquid crystal layer; and a second substrate with a second alignment film. The first and second alignment films are alignment treated such that pixels each include first to fourth domains with different alignment vectors in a column direction, each alignment vector being defined as lying from a first substrate side long-axis end as a start point to a second substrate side long-axis end as an end point. Each pixel electrode has first fine slits parallel to the alignment vector of the second domain in the second domain, second fine slits parallel to the alignment vector of the third domain in the third domain, and a central slit along a boundary between the second domain and the third domain at the boundary. The first fine slits and the second fine slits are connected via the central slit.