Interlocking Protrusions for Curved Display Panel Stress Relief
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Solution Overview
Problem
Conventional curved display panels experience shear stress during bending, leading to cracking and reduced service life due to the stretching and squeezing of substrates, which affects the bonding strength of the sealant and ultimately the panel's functionality.
Innovation Solution
The implementation of first and second protrusions on the substrates in the bending region, arranged in specific patterns such as rectangular or triangular arrays, which interlock and are sealed with a sealant to reduce bending stress and enhance adhesion between the substrates, thereby preventing tearing and improving the panel's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is bent to form a curved display, then the angle of view is widened and product differentiation is realized, but shear stress is generated in the sealant bonding the substrates, causing cracking and reduced service life
Solution Approach 1:
The sealant structure is segmented into multiple portions that are distributed along the bending region. Each sealant portion independently seals the gap between substrates, distributing the shear stress across multiple segments rather than concentrating it in a single continuous sealant layer, thereby preventing crack propagation and improving reliability during bending.
Solution Approach 2:
The sealant is selectively applied only in the bending region where curvature is formed, with different sealant portions positioned at specific locations along the bend. This local application ensures adequate sealing where stress concentrates while avoiding unnecessary sealant in flat regions, optimizing both reliability and stress distribution during curved display operation.
2Shape
If the substrates are bent tightly to achieve high screen-to-body ratio, then the display compactness is improved, but the stretching and squeezing forces on the sealant increase, causing tearing and panel failure
Solution Approach 1:
The sealant is divided into multiple discrete portions along the bending region, allowing each segment to independently accommodate local stretching and squeezing forces. This segmentation prevents stress concentration that would lead to tearing, enabling tighter bending radii and higher screen-to-body ratios while maintaining sealant integrity under increased mechanical stress.
Data Source
AI summary
A display panel and a manufacturing method for display panel are disclosed. The display panel including: a first substrate, a second substrate, first protrusions, and second protrusions. A gap is disposed between the adjacent first protrusions and the adjacent second protrusions, and the first protrusions and the second protrusions are inserted into the gap corresponding to each other to form a fastening interlock structure. The fastening interlock structure effectively releases a bending stress formed by the bending of the panel and protects the display panel.