Curved Display Panel Layout for Multi-Axis Crack Prevention
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Solution Overview
Problem
The challenge in manufacturing curved display devices is the occurrence of cracks due to stress concentration at the intersection of bending axes in display panels, which limits the flexibility and durability of these devices.
Innovation Solution
The display panel design incorporates a non-display area with protrusions along its edge, where drivers and control signal lines are strategically placed to distribute stress and reduce the risk of cracking when bent along intersecting axes, including a thin film encapsulation layer for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is bent along multiple bending axes to create curved display devices, then the adaptability and versatility of the display device is improved, but stress concentration occurs at the intersection of bending axes causing cracks and reducing reliability
Solution Approach 1:
The display panel is divided into multiple regions: a display area, a first non-display area, and a second non-display area. The drivers are segmented and disposed in the first non-display area, while the second non-display area extends to the edge of the display panel. This segmentation allows the panel to be bent along multiple bending axes without stress concentration at intersection points, as the drivers are positioned away from the bending zones. The encapsulation layer covers the display area and portions of the non-display areas, providing protection while allowing the structure to accommodate multi-axis bending.
2Area of stationary object
If drivers are disposed in the non-display area close to the display area, then the dead space is reduced, but stress concentration occurs during bending causing cracks
Solution Approach 1:
The driver arrangement utilizes a two-dimensional layout in the non-display area. The drivers are disposed in the first non-display area, which is adjacent to the display area, while the second non-display area extends to the edge of the display panel. This spatial arrangement in multiple dimensions allows drivers to be positioned close to the display area (reducing dead space) while being located in regions that experience less stress during multi-axis bending, thus maintaining reliability.
3Area of stationary object
If the non-display area is minimized to reduce dead space, then the area efficiency is improved, but the panel becomes more susceptible to cracking when bent along intersecting axes
Solution Approach 1:
Different regions of the display panel are assigned different functions and properties. The display area is optimized for image display, the first non-display area is optimized for housing drivers with reduced dead space, and the second non-display area extends to the edge to provide structural integrity and stress distribution during bending. The encapsulation layer provides local protection to the display area and portions of the non-display areas. This local quality differentiation allows minimization of dead space while maintaining strength and resistance to cracking in critical bending regions.
Data Source
AI summary
A display panel includes a display area in which a plurality of pixels is disposed, a non-display area disposed outside the display area, a plurality of protrusions protruding from the non-display area and disposed along an edge of the non-display area, and a first driver disposed in the non-display area and including a plurality of first stages respectively corresponding to the plurality of protrusions.