Liquid Crystal Display Panel Wall Protrusion Seal Control
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Solution Overview
Problem
In liquid crystal display panels with narrow frame widths, the spread of seal material can cause defective displays and complicate the separation of mother glass substrates, leading to manufacturing challenges such as chipped or broken glass during cutting.
Innovation Solution
The implementation of protrusions in the shape of walls on the resin layer between the array and counter substrates, which suppress the spread of the seal material and facilitate uniform attachment, preventing it from entering the display region and allowing for precise cutting of the substrates without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seal material is applied to a position near the substrate end to prevent it from flowing into the display region, then the display quality is improved, but it becomes difficult to separate the substrates from mother glass substrates
Solution Approach 1:
The invention divides the peripheral region into two functional zones: a first peripheral region for seal material application and a second peripheral region for substrate separation. This segmentation allows the seal material to be applied near the substrate end without interfering with the separation process, as the second peripheral region remains clear for clean separation from mother glass substrates.
Solution Approach 2:
Different regions of the substrate periphery are assigned different functions: the first peripheral region is optimized for seal material attachment while the second peripheral region is optimized for separation. This local differentiation allows each region to perform its specific function effectively without compromising the other.
2Reliability
If the seal material is applied to a position near the substrate end to prevent spreading into the display region, then the display defect is prevented, but the frame width cannot be reduced
Solution Approach 1:
By segmenting the peripheral region into first and second peripheral regions, the invention enables the seal material to be applied in the first region close to the substrate end without requiring excessive distance from the display region. The second peripheral region provides the necessary clearance for separation, allowing narrow frame width while preventing seal material spread into the display area.
3Strength
If the seal material spreads on the array substrate and counter substrate, then the attachment strength is improved, but the seal material may flow into the display region causing defective display
Solution Approach 1:
The invention applies local quality by restricting seal material spreading to the first peripheral region only, while maintaining the second peripheral region as a separation zone. This allows sufficient seal material application for strong attachment without risking flow into the display region, as the segmented structure provides a natural barrier.
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
This solution effectively prevents seal material spread into the display region, ensuring defect-free displays and enabling clean separation of substrates, thus overcoming the limitations of narrow frame widths in liquid crystal display panel manufacturing.
Implementation Method 1
a thermosetting resin is applied to the peripheral portion of the counter substrate, for example, and the counter substrate and the array substrate are attached while the seal material is thermally cured
Data Source
AI summary
In one embodiment, a liquid crystal display panel includes an array substrate and a counter substrate each having a display region and a peripheral region arranged adjacent to the display region. A resin layer is formed either one of the array substrate and the counter substrate. A protrusion in the shape of a wall is arranged on the resin layer with a gap between the protrusion and the substrate opposing the protrusion. A seal material is formed between the array substrate and the counter substrate, and arranged between a peripheral portion of the display region and the protrusion for attaching the array substrate and the counter substrate. A liquid crystal layer is formed in a surrounded region by the array substrate, the counter substrate and the seal material.