LCD Light Shielding Pattern Dam Structure Narrow Bezel
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Solution Overview
Problem
The challenge in manufacturing liquid crystal display (LCD) devices is preventing the alignment layer from overflowing and causing short circuit failures, especially when implementing a narrow bezel design, which requires additional masking processes increasing costs and complexity.
Innovation Solution
The solution involves creating a structure with an open portion in the light shielding pattern on the LCD device, allowing the alignment layer to stagnate within this area, thereby preventing it from reaching the short point without the need for an additional mask process, and using a sealing member to bond the substrates while ensuring the alignment layer does not flow to the short point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dam structure is formed to prevent alignment layer spreading, then short circuit failure is prevented, but manufacturing process complexity and cost increase due to additional mask process
Solution Approach 1:
The patent combines the light shielding pattern and dam structure into a single integrated component. The light shielding pattern is extended to the edge of the display area to automatically serve as a dam structure, eliminating the need for a separate dam structure and additional mask process while maintaining the function of preventing alignment layer spreading.
Solution Approach 2:
The light shielding pattern performs dual functions: (1) shielding light in the non-display area, and (2) acting as a dam structure to prevent alignment layer spreading. This multi-functional design eliminates the need for dedicated dam structures and reduces manufacturing complexity.
2Area of stationary object
If non-display area is reduced to implement narrow bezel, then bezel width is minimized, but alignment layer may overflow and cause short circuit failure
Solution Approach 1:
The light shielding pattern is designed to extend to the very edge of the display area, creating a preliminary barrier that prevents alignment layer from overflowing into the non-display area before the overflow can occur. This proactive design ensures that even with minimal non-display area, the alignment layer is contained within the display area.
Solution Approach 2:
By merging the light shielding pattern extension with the dam structure function, the patent achieves effective alignment layer containment with minimal non-display area, enabling narrow bezel design without compromising reliability.
Data Source
AI summary
A liquid crystal display device includes a first substrate and a second substrate facing each other, a liquid crystal layer disposed between the first substrate and the second substrate, and a light shielding pattern disposed on the first substrate, where the light shielding pattern includes an open portion defined in a non-display area, and the open portion is defined in the light shielding pattern.