Flexible Display Recess Structure for Micro-Crack Containment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices are prone to micro-cracks at their edges, which can spread and destroy the display structure layer, especially when flexible, leading to reduced durability and reliability.
Innovation Solution
Incorporating a driving structure layer with a plurality of recesses on the bending area of the substrate, which acts as a crack stopper to mitigate the spread of micro-cracks and enhance the durability of the display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the substrate is made flexible to enable bending, then adaptability is improved, but micro-cracks spread more easily and reliability deteriorates
Solution Approach 1:
The substrate is divided into a bending area and a non-bending area, with the bending area specifically designed to accommodate flexing while the non-bending area maintains structural integrity. This segmentation allows the display device to be flexible where needed while preventing crack propagation in critical areas.
Solution Approach 2:
Different areas of the substrate are given different mechanical properties - the bending area is designed with properties that allow flexing, while the non-bending area maintains rigidity. This local differentiation enables the substrate to be flexible overall while having specific regions that resist crack formation and propagation.
2Productivity
If conventional manufacturing processes are used, then productivity is maintained, but micro-cracks form at edges and reliability deteriorates
Solution Approach 1:
The substrate structure is designed in advance with designated bending and non-bending areas before the cutting and manufacturing processes begin. This preliminary design ensures that micro-cracks formed during conventional manufacturing at edges will not propagate into the display structure layer, as the bending area is positioned to absorb and contain such defects.
Data Source
AI summary
The disclosure relates to a display device, including a substrate, a driving structure layer, a display structure layer and a touch layer. The substrate includes a bending area and a main area adjacent to the bending area. The driving structure layer is disposed on the substrate. The driving structure layer includes an insulating structure, and the insulating structure includes a plurality of recesses. The display structure layer is disposed on the driving structure layer. The touch layer is disposed on the driving structure layer. A portion of the touch layer is disposed on the bending area of the substrate. At least a part of the plurality of recesses is disposed on the bending area of the substrate.