Curved Display Protection Pattern Limits Substrate Bending
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Solution Overview
Problem
Large-sized flat panel displays, such as LCDs and OLEDs, face damage from excessive bending due to compressive and tensile stresses, leading to cracks and substrate damage when bent beyond a certain curvature.
Innovation Solution
A protection pattern is integrated into the display device, comprising first patterns and second patterns that connect adjacent first patterns, with the first patterns adhering to the substrate and the second patterns providing resistance by bending or straightening to prevent excessive curvature, thereby preventing substrate damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display device is bent to achieve a curved shape, then the visual field difference is compensated and screen size is effectively increased, but cracks are generated in the substrate and panel damage occurs when bent beyond a predetermined curvature
Solution Approach 1:
The protection pattern is divided into multiple first patterns (circles, quadrangles, or rhombuses) distributed across the substrate, with second patterns connecting adjacent first patterns. This segmentation creates multiple independent bending resistance zones that collectively prevent excessive curvature while allowing the overall display device to achieve a curved shape.
Solution Approach 2:
The protection pattern acts as an intermediary structure between the substrate and the bending force. The first patterns adhere to the substrate while the second patterns remain flexible, creating a mediator that absorbs bending stress and prevents direct transmission of excessive forces to the substrate, thereby preventing cracks and panel damage.
2Shape
If the display device is bent to a greater curvature to achieve more extreme curved shapes, then the visual field compensation is improved, but compressive and tensile stresses increase causing substrate damage
Solution Approach 1:
The protection pattern exhibits dynamic behavior during bending: the second patterns bend and orient perpendicular to the bending direction when the display device is bent toward a first direction, and straighten to extend linearly between adjacent first patterns when bent toward the opposite direction. This dynamic adaptation allows the protection pattern to accommodate varying curvature levels while maintaining substrate integrity.
Solution Approach 2:
The protection pattern is pre-configured on the substrate to provide beforehand cushioning against excessive bending forces. The first patterns serve as anchor points that prevent substrate deformation, while the second patterns act as flexible cushions that absorb bending stress before it can reach the substrate, preventing crack formation even at greater curvatures.
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
The protection pattern effectively limits the curvature of the display panel, preventing damage by allowing the substrate to bend only up to a threshold, thereby extending the lifespan of the curved display device.
Implementation Method 1
the first patterns adhere to the display panel
Implementation Method 2
the second patterns may be arranged to bend so that parts thereof orient toward a second direction substantially perpendicular to the first direction, and when the display panel is bent toward a direction opposite to the first direction, the second patterns may be arranged to straighten so as to extend substantially linearly between adjacent first patterns
Data Source
AI summary
Embodiments of the present invention provide a curved display device including: a display panel; and a protection pattern coupled to the display panel, wherein the protection pattern includes a plurality of first patterns and second patterns connecting adjacent first patterns, and the second patterns have arcuate shapes when the display panel is flat. According to embodiments of the present invention, the panel is prevented from being bent beyond a threshold curvature by the protection pattern, thereby preventing damage to the panel.