Flexible Display Corner Bending Hole Design
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Solution Overview
Problem
Flexible displays face challenges in folding without damaging the wires and substrates due to interference and cracking, especially when the edges are folded in a direction opposite to the display direction, leading to potential detachment and reduced durability.
Innovation Solution
The introduction of a bending hole at the corner of the flexible display panel, which allows edges to fold in an overlapping manner, and a folding region is formed to prevent wire damage and substrate cracking, enabling the edges to be folded without interference, and a reinforcing film is used to enhance rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If edges are folded in a direction opposite to the display direction to reduce bezel size, then the active area visibility is increased, but wire detachment and substrate cracking occur due to interference and mechanical stress
Solution Approach 1:
The patent divides the corner region into separate functional zones: a bending hole region that allows controlled deformation, and a folding region that guides the folding path. This segmentation prevents uncontrolled stress propagation to the wires and substrate, enabling edges to be folded opposite to the display direction without causing wire detachment or substrate cracking.
Solution Approach 2:
The patent introduces a reinforcing film as an intermediary element between the flexible substrate and the external environment. This reinforcing film distributes mechanical stress during folding operations, preventing direct stress concentration on the wires and substrate, thereby maintaining their integrity while allowing the edges to be folded in the opposite direction to increase active area visibility.
2Reliability
If a bending hole is formed at the corner to enable folding, then wire damage and substrate cracking are prevented, but the manufacturing process complexity increases
Solution Approach 1:
The bending hole and folding region are formed during the manufacturing process before the display is assembled and deployed. This preliminary action ensures that the structural modifications are already in place to prevent wire damage and substrate cracking during subsequent folding operations, rather than requiring complex protective measures during use.
Solution Approach 2:
The patent utilizes the flexible nature of the substrate and reinforcing film to create a folding region that can be formed through standard flexible display manufacturing techniques. The bending hole is created as a through-hole in the flexible substrate, allowing the corner to be folded without causing stress concentration, while the reinforcing film maintains overall structural integrity. These are standard processes in flexible display manufacturing.
Data Source
AI summary
A flexible display and a method of manufacturing the same are disclosed. In one aspect, the flexible display includes a flexible display panel including an active area displaying configured to display an image and an inactive area extending towards the outside of the active area, and a plurality of wires disposed over the flexible display panel in the inactive area and transmitting configured to transmit an electric signal to the active area. A bending hole is disposed at a corner where two adjacent edges of the flexible display panel meet in the inactive area. The bending hole is interposed between the plurality of the wires and the active area. The corner is folded so as to define a folding region.