Resin Segmentation in Foldable Display Bending Areas
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Solution Overview
Problem
Existing electronic devices face challenges in preventing resin penetration between adhesive layers when the bending area is bent, leading to potential waviness defects and reduced display quality.
Innovation Solution
The electronic device is designed with a specific structure that includes a display module with a bending area, non-bending areas, protective members, and adhesive layers. A resin is applied to specific areas between the protective members and the functional layer, and the bending area is bent along a virtual axis, ensuring that the resin does not penetrate between the adhesive layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If resin is applied to a large area between protective members, then filling effect is improved, but resin penetration between adhesive layers occurs
Solution Approach 1:
The patent divides the resin application area into two distinct regions: a first area between the protective members overlapping the bending area, and a second area at the edge of the functional layer adjacent to the bending area. These areas are spaced apart from each other, preventing continuous resin application that would cause penetration between adhesive layers while still providing sufficient filling effect.
Solution Approach 2:
The patent applies resin with different spatial distributions in different locations: a larger first area between protective members for primary filling, and a smaller second area at the functional layer edge for supplementary filling. This localized differentiation optimizes resin placement to prevent penetration while maintaining filling effectiveness.
2Adaptability or versatility
If bending area is bent along virtual axis, then device flexibility is improved, but resin penetration and waviness defects occur
Solution Approach 1:
The patent applies resin to specific areas (first area between protective members and second area at functional layer edge) before the bending process. This preliminary resin application ensures that when the bending area is bent along the virtual axis, the resin is already in position to fill gaps without penetrating adhesive layers, preventing waviness defects while maintaining display flatness.
Solution Approach 2:
The patent creates different resin application characteristics in different locations: the first area provides bulk filling between protective members, while the second area at the functional layer edge provides precise edge filling. This localized quality differentiation ensures proper resin distribution during bending without causing penetration or waviness.
Data Source
AI summary
Disclosed is an electronic device including a display module including a bending area bent along a virtual bending axis, a first non-bending area and a second non-bending area spaced apart from each other with the bending area therebetween, a front surface, and a rear surface opposite to the front surface, a first protective member below the rear surface and overlapping the first non-bending area, a second protective member above the rear surface, overlapping the second non-bending area, and facing the first protective member, a functional layer between the first protective member and the second protective member, and a protective layer on the rear surface, overlapping the bending area, and contacting side surfaces of the first protective member, the functional layer, and the second protective member.