Flexible Display Panel Corner Design for Stress Distribution
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Solution Overview
Problem
Flexible plastic substrates in display panels are prone to defects during manufacturing due to external impacts, leading to separation or detachment of substrates and sealant failure, which reduces product yield and limits portability and size of display devices.
Innovation Solution
A display panel design featuring flexible substrates with polygonal or curving edges at corners, where the edges of one substrate align with those of another, reducing the likelihood of separation and enhancing durability against external impacts by distributing stress effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If flexible plastic substrates are used to reduce weight and improve portability, then weight reduction and portability are improved, but the substrates become prone to defects such as cracking and peeling during manufacturing due to external impacts
Solution Approach 1:
The patent applies curvature by replacing sharp corner edges with rounded or curved edges on the flexible substrate. This design modification distributes mechanical stress more evenly during external impacts, preventing stress concentration at sharp corners that would otherwise cause cracking and peeling defects, thereby improving substrate reliability while maintaining flexibility and light weight
2Ease of manufacture
If sharp corner edges are present on flexible substrates, then manufacturing is simpler, but external impacts cause separation of substrates and detachment of sealant
Solution Approach 1:
By rounding or curving the corner edges of substrates, the patent eliminates stress concentration points that occur at sharp corners during impact. This curvature design enhances the mechanical strength and resistance to separation and detachment without significantly complicating the manufacturing process
Solution Approach 2:
The curved edge design acts as a preemptive measure against impact damage. By pre-modifying the corner geometry to have rounded edges, the substrate is prepared in advance to absorb and distribute impact forces, preventing separation and detachment before they can occur during manufacturing or use
3Device complexity
If traditional straight edges are used at substrate corners, then the structure is simpler, but defects occur more frequently during manufacturing due to stress concentration
Solution Approach 1:
The patent introduces curved or rounded edges at substrate corners as a simple geometric modification. This curvature change distributes stress during manufacturing processes, significantly reducing cracking and peeling defects without adding substantial structural complexity to the corner design
Data Source
AI summary
A display panel that includes a flexible substrate is provided. The flexible substrate includes a first corner, and a plurality of display elements disposed on the first substrate. The flexible substrate also includes a first primary edge and a second primary edge which extend in different directions to meet at the first corner, and the first corner includes a first edge having a polygonal shape with n (n is a natural number of 2 or more) vertexes.