Resin Layer Anchor Portions for Bendable Display Wiring
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Solution Overview
Problem
In display devices with bending regions, the layered resin layers tend to peel off from each other when the region is bent, leading to potential cracks and disconnection of relay wiring lines.
Innovation Solution
A display device design featuring a bending region with a first resin layer, relay wiring lines, a second resin layer, and a third resin layer, where the second and third layers have anchor portions with protruding and recessed surfaces that engage each other, preventing peeling and enhancing adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple resin layers are layered in the bending region to provide structural support and flexibility, then the display device can achieve bendability, but the resin layers may peel off from each other when bent
Solution Approach 1:
Protruding portions are formed in advance on the surface of one resin layer before bending occurs. These protruding portions engage with recessed portions on adjacent resin layers, creating mechanical interlocking that prevents peeling during subsequent bending operations.
Solution Approach 2:
The resin layers are provided with localized protruding and recessed portions at specific regions where bending stress concentrates. This local structural modification enhances adhesion precisely where needed without affecting the overall flexibility or requiring modification of the entire layer structure.
2Adaptability or versatility
If resin layers are layered in the bending region to maintain structural integrity, then flexibility is achieved, but cracks may occur in the resin layers during bending
Solution Approach 1:
Protruding portions are formed on resin layer surfaces before bending to create mechanical interlocking structures. This preliminary structural preparation prevents crack propagation by distributing bending stresses across the engaged protruding and recessed portions, maintaining reliability while preserving flexibility.
3Adaptability or versatility
If resin layers are layered in the bending region to provide mechanical support, then bendability is achieved, but relay wiring lines may disconnect during bending
Solution Approach 1:
Protruding portions are formed in advance on resin layer surfaces to create mechanical interlocking structures. This preliminary action ensures that relay wiring lines embedded in or on the resin layers remain securely positioned and connected during bending, preventing disconnection while maintaining bendability.
Data Source
AI summary
A display device includes a display region of an image, a terminal region provided with a plurality of terminals, a bending region being a region between the display region and the terminal region and being bendable, the bending region includes a first resin layer, a plurality of relay wiring lines provided on the first resin layer and provided between the display region and the terminal region, a second resin layer provided at an upper layer of the plurality of relay wiring lines and the first resin layer, and a third resin layer provided on the second resin layer, and a surface of each of the second resin layer and the third resin layer is provided with a plurality of anchor portions each of which includes a protruding portion provided at one surface and a recessed portion provided at the other surface, the recessed portion being engaged with the protruding portion.