Flexible Display Panel Bending Area Stress Reduction
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Solution Overview
Problem
Flexible display panels prone to cracking due to increased forces acting on the flexible bending portion when bent, affecting normal display.
Innovation Solution
A display panel design with a flexible bending portion that includes a bending area close to the display area, hidden in one side of the display substrate after bending, and is located within a range defined by a non-bendable section, reducing forces acting on the bending area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible bending portion is used to implement narrow frame and four-side bending, then the adaptability and flexibility of the display panel are improved, but the reliability deteriorates due to increased forces causing cracking
Solution Approach 1:
The display panel is divided into three distinct sections along the bending direction: a first bendable section, a non-bendable section, and a second bendable section. The flexible bending portion is specifically positioned within the non-bendable section, which is located between the two bendable sections. This segmentation allows different parts of the panel to have different mechanical properties, with the non-bendable section providing structural support to prevent cracking while the bendable sections allow flexibility for narrow frame implementation.
2Device complexity
If the flexible bending portion is positioned to enable narrow frame, then the device complexity is reduced, but the strength deteriorates due to increased bending forces on the flexible portion
Solution Approach 1:
The patent applies local quality by creating a non-bendable section with specific mechanical properties (higher stiffness and strength) at the location where the flexible bending portion is positioned. This non-bendable section has different properties from the bendable sections, providing localized structural reinforcement. The non-bendable section's material composition and structural characteristics are specifically designed to resist bending forces and prevent cracking in the flexible bending portion while maintaining overall panel flexibility through the bendable sections.
Data Source
AI summary
A display panel and a display device. The display panel comprises a display substrate; the display substrate comprises a display area and a flexible bending portion protruding from the display area; the flexible bending portion comprises a bending area close to the display area; the flexible bending portion is hidden on the side of the display substrate facing away from the display side after being bent by the bending area; the display panel is a bendable panel in a first direction; the display panel has a bendable section and a non-bendable section in the first direction; in the first direction, the bending area is located within a range defined by the non-bendable section, and the first direction is a direction perpendicular to the direction in which the flexible bending portion protrudes with respect to the display area.