LCD Substrate Domain Boundary Control via Light Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display (LCD) panels face issues with narrow viewing angles, residual images, and decreased light transmittance due to irregular singular points and uncontrolled liquid crystal molecule arrangements at domain boundaries, which are exacerbated by the formation of slit or protruding patterns for multi-domain alignment.
Innovation Solution
A display substrate with a base substrate and pixel electrodes, including low and high pixel electrodes, where the liquid crystal molecule control part is formed on at least one of the electrodes to control liquid crystal molecules at the boundary, enhancing the alignment and preventing afterimages and stains by uniformly positioning singular points and optimizing light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a slit pattern or protruding pattern is formed to create multi-domains, then the viewing angle is improved, but additional manufacturing processes are required and residual images or stains are generated
Solution Approach 1:
The invention extracts and eliminates the need for additional slit or protruding pattern formation processes by utilizing the natural light alignment effect during the liquid crystal injection process. The liquid crystal molecules themselves are used to create the domain division pattern through their alignment properties, rather than adding separate structural elements.
Solution Approach 2:
The liquid crystal molecules perform the dual function of both filling the display cell and creating the domain alignment pattern through their self-alignment properties during injection. The light alignment method allows the liquid crystal to automatically form the desired multi-domain structure without external patterning assistance.
2Illumination intensity
If a slit pattern or protruding pattern is formed to create multi-domains, then the viewing angle is improved, but residual images and stains are generated in the pattern areas
Solution Approach 1:
The invention removes the physical slit or protruding patterns that cause residual images and stains, replacing them with a light alignment method that creates domain boundaries without permanent structural features. The domain division is achieved through temporary light exposure during liquid crystal injection, leaving no residual pattern structures.
3Device complexity
If multi-domains are formed through light alignment without slit or protruding patterns, then manufacturing complexity is reduced, but irregular singular points are generated and liquid crystal molecule arrangement at domain boundaries is uncontrolled
Solution Approach 1:
The invention performs preliminary light alignment of the liquid crystal molecules during the injection process itself, before the liquid crystal settles in its final position. By exposing the liquid crystal to polarized light during injection, the molecules are pre-aligned in the desired domain patterns, ensuring controlled arrangement at boundaries before encapsulation.
4Device complexity
If multi-domains are formed through light alignment, then additional manufacturing processes are reduced, but light transmittance at domain boundaries decreases due to uncontrolled liquid crystal arrangement
Solution Approach 1:
The liquid crystal molecules are pre-aligned during injection using polarized light, ensuring that at domain boundaries the molecules maintain a consistent tilt angle and orientation. This preliminary alignment prevents the random arrangement that would otherwise occur at boundaries, maintaining high light transmittance while still achieving domain division.
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 prevents afterimages and stains at domain boundaries while enhancing light transmittance, thereby improving the display quality and viewing angles of LCD panels.
Implementation Method 1
The liquid crystal molecules of the LCD apparatus have anisotropy so that the image display quality of the LCD apparatus is displayed based on a viewing angle.
Implementation Method 2
a technology in which the slit pattern or the protruding pattern is not formed in order to realize multiple domains through a light alignment has been developed
Data Source
AI summary
One or more embodiments of a display substrate include a base substrate and a pixel electrode. The base substrate has a pixel area defined thereon. The pixel electrode includes a low pixel electrode formed in the pixel area to receive a first voltage, a high pixel electrode spaced apart from the low pixel electrode along a first direction to receive a second voltage that is higher than the first voltage, and a liquid crystal molecule control part formed on at least one of the low and high pixel electrodes so as to control liquid crystal molecules disposed at an area corresponding to a boundary of the low and high pixel electrodes. The liquid crystal molecules disposed at a domain corresponding to a boundary between the low and high pixel electrodes may be controlled, so that the generation of stains or afterimages may be prevented at a boundary of domain areas.