Flexible Display Design to Prevent Delamination Defects
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Summary
Problems
Flexible display devices face issues with delamination defects and damage when bent, leading to increased dead space due to cracking of substrates and protective layers.
Innovation solutions
A display device design featuring a substrate with a bending area, a display active layer, a polarization layer, a protective layer, and an adhesive layer with an extension area that overlaps the protective layer, along with a laminated member, to enhance adherence and prevent delamination during bending.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a protective layer is applied to the bent area of the flexible substrate, then the substrate and wires are protected from cracking, but delamination defects occur in the protective layer when the substrate is bent
Why choose this principle:
An adhesive layer is introduced as an intermediary between the protective layer and the substrate. This adhesive layer extends from the display area into the bending area, providing strong adhesion that prevents delamination of the protective layer during bending operations while maintaining the protective function against cracking.
Principle concept:
If a protective layer is applied to the bent area of the flexible substrate, then the substrate and wires are protected from cracking, but delamination defects occur in the protective layer when the substrate is bent
Why choose this principle:
The adhesive layer is applied in advance to the substrate before the protective layer is formed. The adhesive layer extends into the bending area beforehand, ensuring that when the protective layer is subsequently applied and the device is bent, the pre-positioned adhesive prevents delamination from occurring.
Application Domain
Data Source
AI summary:
A display device design featuring a substrate with a bending area, a display active layer, a polarization layer, a protective layer, and an adhesive layer with an extension area that overlaps the protective layer, along with a laminated member, to enhance adherence and prevent delamination during bending.
Abstract
A display device includes a substrate that includes a bending area, a display active layer disposed on the substrate and that displays an image, a polarization layer disposed on the display active layer, a protective layer that contacts an end of the polarization layer and covers the bending area of the substrate; and an adhesive layer disposed on a boundary between the polarization layer and the protective layer, the adhesive layer extends from the end of the polarization layer toward the bending area by an extension area to overlap a portion of the protective layer.