Concave Bending Points for Flexible Display Panel Stress Control
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Solution Overview
Problem
Conventional flexible display panel bending technologies result in uneven bending amounts between left and right sides, leading to insufficient folding precision and excessive stress concentration, which can damage metal wires and reduce the service life of the panel.
Innovation Solution
The display panel design incorporates bending points on the side edges of the bending region, which are concaved inward, creating a recess and guiding the bending process to reduce stress concentration and improve precision, with the bending points being symmetrical and strategically positioned to balance internal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If straight edge cutting technology is used to create a narrow bezel design, then the bezel width is reduced, but large bending stress and stress concentration are generated during folding, which can break wires and reduce service life
Solution Approach 1:
The patent applies curvature by designing the bending region with a curved boundary instead of a straight edge. The bending region includes a curved side edge that connects the display region and the non-display region, allowing stress to be distributed along the curved path rather than concentrated at a straight edge. This curvature design reduces stress concentration and prevents wire breakage during folding while achieving the narrow bezel effect.
Solution Approach 2:
The patent applies local quality by creating a bending region with different structural properties from the rest of the display panel. The bending region has a specific curved geometry and is positioned at a predetermined location, allowing it to accommodate folding stress locally without affecting the overall structural integrity of the display panel. This localized design enables the narrow bezel while protecting wires in the bending region from breakage.
2Ease of manufacture
If conventional bending technology is used with straight edges, then the manufacturing process is simple, but folding precision is insufficient due to different bending amounts on left and right sides
Solution Approach 1:
The patent applies asymmetry by positioning the bending region at a specific asymmetric location rather than centrally. The bending region is disposed at a predetermined location that is asymmetric with respect to the display panel, allowing different bending characteristics on different sides. This asymmetric positioning enables precise control of folding behavior while maintaining manufacturing simplicity.
Data Source
AI summary
A display panel, a folding method thereof, and a display device are provided. The display panel includes a display region, a non-display region, and a bending region. Side edges of the bending region include bending points, the bending points are disposed in the bending region, and the side edges are concaved toward an interior of the bending region at the bending points. During folding, the bending points on the side edges of two sides form at least one guiding axis, which makes the display panel easier to bend, and folding precision and folding effect are good.