LCD Junction Alignment Structure for Viewing-Angle Color Control
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Solution Overview
Problem
Existing multi-domain liquid crystal display (LCD) designs suffer from disordered electric field distribution in junction areas between adjacent domain areas, leading to reduced light transmittance and noticeable color casts when viewed from different angles.
Innovation Solution
A liquid crystal display panel with alignment structures in the junction areas that are symmetrically arranged about a symmetry axis, fixing the orientation of liquid crystal molecules to improve light transmittance and maintain consistent screen brightness across viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a multi-domain design is used for pixel electrodes to ensure consistent screen brightness across different viewing angles, then color casts are mitigated, but the electric field distribution in junction areas becomes disordered, reducing light transmittance
Solution Approach 1:
The patent applies local quality by introducing alignment structures specifically in the junction areas between domain areas, while maintaining the existing multi-domain design in other regions. These alignment structures locally modify the electric field distribution and liquid crystal molecule orientation in the junction areas, improving light transmittance without affecting the overall brightness consistency achieved by the multi-domain design.
Solution Approach 2:
The alignment structures act as intermediary elements between adjacent domain areas. These structures mediate the electric field distribution in the junction areas, creating a more ordered arrangement that improves liquid crystal molecule deflection and light transmittance, while still allowing the multi-domain design to function effectively.
2Reliability
If alignment structures are added to junction areas to fix liquid crystal molecule orientation, then light transmittance improves, but device complexity increases
Solution Approach 1:
The alignment film is segmented into distinct regions: standard alignment film in domain areas and alignment structures with specific geometric shapes (triangles, rectangles, or combinations) in junction areas. This segmentation allows the patent to address the specific problem of junction area light transmittance without redesigning the entire alignment film structure, thereby limiting the increase in device complexity to only the necessary 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 alignment structures in the junction areas ensure fixed orientation of liquid crystal molecules, enhancing light transmittance and mitigating color casts, thereby improving display quality.
Implementation Method 1
liquid crystal molecules distributed in the plurality of domain areas and the one or more junction areas
Implementation Method 2
the alignment film has one or more alignment structures in each junction area; each alignment structure in each junction area is arranged symmetrically about the symmetry axis of the two adjacent domain areas corresponding to the junction area
Implementation Method 3
existing multi-domain designs feature junction areas between adjacent domain areas, where an electric field distribution is relatively disordered
Data Source
AI summary
The present disclosure provides a liquid crystal display panel and a display device. The liquid crystal display panel at least includes a plurality of sub-pixels, liquid crystal molecules, and an alignment film. The plurality of sub-pixels have a plurality of domain areas and one or more junction areas each of which is between two corresponding adjacent domain areas. There is a symmetry axis between every two adjacent domain areas. Liquid crystal molecules are distributed in the plurality of domain areas and the junction area(s). The alignment film is provided in the plurality of domain areas and the junction area(s).