Liquid Crystal Display Light Blocking Pattern for Leakage Prevention
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Solution Overview
Problem
In liquid crystal display devices with a high light transmittance structure, misalignment during the assembly of substrates can cause light leakage due to the scratching of the alignment layer by column spacers, particularly in regions where the liquid crystal molecules are not accurately aligned, leading to boundary issues with the light blocking pattern.
Innovation Solution
A liquid crystal display device design that incorporates a light blocking pattern with extended portions around the column spacer, where the light blocking metal overlaps with regions adjacent to the boundary of the extended portion not parallel to the liquid crystal molecule alignment direction, preventing light leakage by ensuring accurate alignment and control of liquid crystal molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an attached structure of a light blocking pattern is applied to prevent light leakage, then light leakage prevention is improved, but liquid crystal molecule alignment accuracy deteriorates in the boundary region
Solution Approach 1:
The light blocking pattern is segmented into a main body portion and an extended portion that protrudes toward the column spacer. This segmentation allows the extended portion to cover the boundary region where alignment issues occur, preventing light leakage without interfering with the alignment in the main display area.
Solution Approach 2:
The extended portion of the light blocking pattern acts as an intermediary element between the main light blocking pattern and the column spacer. It specifically targets and covers the boundary region where liquid crystal molecules have alignment difficulties, thereby preventing light leakage in this problematic area without affecting the overall alignment quality.
2Object-affected harmful factors
If a light blocking pattern extends to the column spacer to prevent light leakage, then light leakage prevention is improved, but the boundary region structure becomes more complex
Solution Approach 1:
The light blocking pattern has different structures in different regions: the main body portion maintains a standard structure for normal light blocking, while the extended portion specifically protrudes toward the column spacer to address the boundary region issue. This local differentiation allows targeted light leakage prevention without unnecessarily complicating the entire device structure.
Data Source
AI summary
A liquid crystal display device is provided. The liquid crystal display device of the disclosure includes: a first substrate and a second substrate facing each other; a liquid crystal layer interposed between the first substrate and the second substrate; a column spacer disposed on the first substrate and maintaining a gap between the first substrate and the second substrate; a light blocking pattern disposed on the first substrate and including an extended portion formed around the column spacer; and light blocking metal overlapped with at least a part of a region adjacent to and outside of a boundary of the extended portion that is not parallel to an alignment direction of liquid crystal molecules.