Liquid Crystal Display Sealing with Auxiliary Spacers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal display panels, especially those with narrow frames, the sealing member's corner portions are prone to curvature and void formation due to atmospheric pressure changes, leading to uneven substrate gaps and reduced adhesion, which affects display quality and manufacturing accuracy.
Innovation Solution
The implementation of main and auxiliary spacers between the substrates, with auxiliary spacers filling the voids between the corner portions and outer edge spacers, and a sealing member applied in a quadrilateral frame shape to maintain the cell gap and prevent atmospheric pressure-induced deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the frame region is narrowed to secure a large display region while keeping a small external form, then the display area increases, but the bonding area between substrates decreases and adhesion becomes weaker
Solution Approach 1:
The sealing member is divided into multiple portions: a main body portion forming a quadrilateral frame and corner portions extending from each vertex. This segmentation allows the corner portions to provide additional bonding area specifically at critical locations without increasing the overall frame width, thus maintaining display area while enhancing adhesion strength.
Solution Approach 2:
The corner portions are specifically positioned at the vertices where stress concentration occurs. By concentrating additional bonding material at these critical local regions rather than uniformly increasing the frame width, the invention enhances adhesion strength where it is most needed while preserving the narrow frame design for maximum display area.
2Adaptability or versatility
If the corner portions of the sealing member are bent at right angles to fit narrow frames, then the frame structure is adapted, but voids form between the corner portions and outer edge spacers leading to gap unevenness
Solution Approach 1:
The corner portions are pre-formed with predetermined bending radii that are optimized to prevent void formation. By designing the corner geometry in advance with appropriate curvature, the invention eliminates the need for post-adjustment and prevents atmospheric pressure from causing displacement or gap unevenness during the bonding process.
Solution Approach 2:
Instead of sharp right angles, the corner portions are designed with predetermined bending radii that create smooth curved transitions. This curvature allows the corner portions to better accommodate the narrow frame structure while maintaining continuous contact with the outer edge spacers, preventing void formation and ensuring uniform substrate gaps.
3Productivity
If the sealing member is applied in a narrow width to adapt to smaller panels, then productivity increases, but the bonding area decreases and adhesion becomes weaker
Solution Approach 1:
The sealing member is segmented into a narrow main body portion for efficient space utilization and extended corner portions for enhanced bonding. This segmentation allows the majority of the sealing member to maintain narrow width for high productivity, while the corner portions provide additional bonding area specifically where needed for adhesion strength.
Solution Approach 2:
Additional bonding area is concentrated at the corner portions rather than uniformly increasing the sealing member width. This local enhancement of bonding capability at critical vertices maintains narrow overall dimensions for high productivity while providing sufficient adhesion strength through strategically placed corner extensions.
Data Source
AI summary
According to one embodiment, a liquid crystal panel includes substrates opposed to each other and paired. The liquid crystal panel includes a liquid crystal layer interposed between the substrates. The liquid crystal panel includes a sealed portion that includes bending corner portions at positions spaced from the outer edges of the substrates, and surrounds the periphery of the liquid crystal layer and bonds the substrates together. The liquid crystal panel includes main spacers that are interposed between the substrates at the position of the liquid crystal layer and hold the gap between the substrates. The liquid crystal panel includes auxiliary spacers that are interposed between the substrates to fill the portions between the outer side portions of the corner portions of the sealed portion and the outer edge sides of the substrates and hold the gap between the substrates.