Foldable Display Light Shielding Structure for Flatness and Reliability
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Solution Overview
Problem
Conventional foldable display apparatuses face challenges with reliability due to thickness issues in cover members and adhesive layers, leading to stress-induced cracks, peeling, and reduced flatness, which affect the display's appearance and functionality.
Innovation Solution
A foldable display apparatus design featuring a multilayer light shielding structure with overlapping thin light shielding members and a thin adhesive member to compensate for step differences, ensuring a high light shielding rate while maintaining thinness and reducing peeling and light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the thickness of the foldable cover member is minimized to improve folding characteristics, then the folding property is improved, but cracks may occur in the foldable cover member and the foldable display panel due to increased tensile or compressive stress
Solution Approach 1:
The patent applies parameter changes by carefully controlling the thickness of the cover member within a specific range (10μm to 50μm) and adjusting the adhesive member thickness (30μm to 100μm) to optimize the balance between folding flexibility and stress resistance, preventing crack formation while maintaining adaptability
2Adaptability or versatility
If the thickness of the adhesive member is minimized to improve folding characteristics, then the folding property is improved, but the adhesive member can be peeled from the foldable cover member or the foldable display panel due to bending stress
Solution Approach 1:
The patent optimizes the adhesive member thickness within a specific range (30μm to 100μm) to maintain adequate bonding strength while allowing folding. This parameter adjustment ensures the adhesive layer is thick enough to resist peeling under bending stress but thin enough to maintain folding adaptability
3Adaptability or versatility
If the thickness of the foldable display apparatus is minimized, then the folding characteristic is improved, but the flatness of the display apparatus is reduced
Solution Approach 1:
The patent carefully controls the thickness parameters of the cover member (10μm to 50μm) and adhesive member (30μm to 100μm) to achieve an optimal balance. This parameter optimization allows the display apparatus to maintain good flatness while preserving folding characteristics
Data Source
AI summary
A display apparatus includes a flexible display panel including a display area configured to display an image and a periphery area adjacent to the display area, a first light shielding member, configured to shield a light at least a portion of the periphery area at a first light shielding rate, disposed on the flexible display panel, an adhesive member configured to cover the first light shielding member and the flexible display panel, a second light shielding member, overlapped at least a portion of the first light shielding member, configured to shield a light at a second light shielding rate, disposed on the adhesive member, and a cover member configured to cover the adhesive member and the second light shielding member.