LCD Panel Alignment Film Positioning via Substrate Limiting Portions
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Solution Overview
Problem
Liquid crystal display panels face issues with low position accuracy of alignment films and poor adhesion between the sealant and alignment films, leading to poor product quality due to the sealant extending into non-display regions and low adhesive force.
Innovation Solution
The solution involves arranging limiting portions on the substrates to confine the alignment films within specific regions, creating a sparsely-arranged and densely-arranged wire region structure on the array substrate with varying layer heights, ensuring the sealant projections are outside the limiting portions, thereby maintaining accurate alignment film positions and preventing sealant adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the alignment film is formed without limiting portions, then the manufacturing process is simple, but the position accuracy of the alignment film deteriorates
Solution Approach 1:
The patent introduces limiting portions that divide the substrate into distinct regions: a display region where the alignment film is formed, and a non-display region where the sealant is applied. This segmentation ensures the alignment film remains confined to the display region, improving position accuracy without significantly complicating the overall manufacturing process.
Solution Approach 2:
The limiting portions are formed on the substrate before the alignment film is deposited. This preliminary action creates predefined boundaries that guide the alignment film formation process, ensuring accurate positioning from the outset rather than requiring complex post-processing adjustments.
2Reliability
If the sealant is applied without limiting portions, then the sealing process is simple, but the sealant adheres to the alignment film causing poor product quality
Solution Approach 1:
The limiting portions create a clear separation between the display region (with alignment film) and the non-display region (where sealant is applied). This segmentation prevents the sealant from contacting the alignment film, eliminating adhesion issues and improving product reliability.
Solution Approach 2:
The patent extracts the sealant application area from the display region by confining the alignment film within limiting portions. This extraction ensures the sealant is applied only in the non-display region, preventing unwanted adhesion to the alignment film while maintaining a relatively simple sealing process.
3Reliability
If the alignment film extends to the non-display region, then the alignment film formation is simple, but the sealant adhesion to alignment film causes poor product quality
Solution Approach 1:
The limiting portions segment the substrate into display and non-display regions, confining the alignment film to the display region. This prevents the alignment film from extending into the non-display region where the sealant is applied, thereby preventing adhesion issues and improving product quality.
Solution Approach 2:
The limiting portions are prepared in advance on the substrate before alignment film formation. This preliminary structuring establishes clear boundaries that control the alignment film position during deposition, preventing unwanted extension into the non-display region.
Data Source
AI summary
A liquid crystal display panel and a manufacturing method therefor, and a display device are provided. The display panel includes an opposing substrate, an array substrate, and a sealant. A limiting portion surrounding a display region is disposed in a non-display region of the opposing substrate. A non-display region of the array substrate includes a loosely-arranged wire region surrounding a display region and a densely-arranged wire region surrounding the loosely-arranged wire region. The layer height of the array substrate in the densely-arranged wire region is greater than that of the array substrate in the loosely-arranged wire region. The projection of the sealant on the opposing substrate is located outside the limiting region and the projection of the sealant on the array substrate is located in the densely-arranged wire region.