Bending-Protected Display Substrate With Aligned Inclined Surfaces
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Solution Overview
Problem
Display devices face challenges with cracks and peeling defects when substrates are bent, particularly in the bending area between the display area and the pad area.
Innovation Solution
A display device design that includes a first substrate with a bending area between two areas, and a bending-protection layer that covers the first and second areas but does not overlap the bending area, with inclined surfaces aligned to manage stress and reduce defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a substrate is bent to reduce the width of the non-display area, then the immersion and aesthetics are enhanced, but cracks and peeling defects occur in the bending area
Solution Approach 1:
The substrate is divided into a rigid first substrate and a flexible second substrate that can be bent independently. The bending area is specifically positioned between the display area and pad area, allowing the second substrate to flex while the first substrate maintains structural integrity, thereby preventing cracks and peeling defects in the bending region
Solution Approach 2:
The display device uses a composite substrate structure combining rigid and flexible materials. The first substrate (rigid) provides structural support while the second substrate (flexible) enables bending without damage. This composite approach allows the device to achieve both the desired shape modification and reliability in the bending area
2Strength
If a bending-protection layer is added to prevent cracks, then structural integrity is improved, but device complexity increases
Solution Approach 1:
The bending-protection layer is integrated with the existing substrate structure by forming it as part of the second substrate or as a closely associated layer. This merging approach provides structural integrity enhancement without adding significant device complexity, as the protection layer is incorporated into the existing flexible substrate system rather than being a separate additive component
Data Source
AI summary
A display device includes a first substrate including a first area, a second area, and a bending area that is between the first area and the second area, and including a second inclined surface facing the bending area, a light-emitting element at the first area, and a first bending-protection layer at the first area and the second area, not overlapping the bending area, and including a first inclined surface facing the bending area and aligned with the second inclined surface.