Flexible Organic LED Display Backplate for Bend-Area Wiring Integrity
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Solution Overview
Problem
Flexible organic light-emitting display apparatuses face issues with wiring cracking and reduced rigidity in bending areas, which can lead to damage and deformation when external forces are applied.
Innovation Solution
A flexible organic light-emitting display apparatus is designed with a substrate that includes a bending area supported by a backplate with a bending structure featuring slit patterns, which enhances the rigidity and reduces stress in the bending portion, preventing damage and maintaining curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the substrate is made flexible to enable bending, then adaptability and flexibility are improved, but wiring cracking and reduced rigidity occur in bending areas
Solution Approach 1:
The backplate is segmented into a first plate and a second plate that are selectively disposed at different locations. The first plate is positioned at the bending area to provide support and prevent wiring cracking, while the second plate is positioned at other areas. This segmentation allows the structure to maintain flexibility where needed while providing rigidity support where required.
Solution Approach 2:
Different regions of the display apparatus are assigned different structural qualities. The bending area receives enhanced rigidity through the first backplate, while other areas maintain their original flexible characteristics. This local differentiation resolves the contradiction by applying rigidity only where necessary to prevent wiring cracking, rather than making the entire structure rigid.
2Reliability
If the bending area is supported to prevent wiring cracking, then reliability is improved, but the apparatus becomes less flexible
Solution Approach 1:
The backplate structure is divided into multiple segments (first plate and second plate) that are selectively positioned. The first plate is located only at the bending area to provide necessary support, while the rest of the structure remains flexible. This selective segmentation maintains overall flexibility while providing localized reliability enhancement.
Solution Approach 2:
The structural quality is made non-uniform by placing the first backplate only at the bending area where wiring cracking risk exists. This local quality enhancement provides reliability where needed without compromising the flexibility of the overall apparatus, as other areas remain structurally simple and flexible.
3Strength
If a rigid backplate is used to strengthen the bending area, then strength is improved, but the bending area cannot maintain curvature
Solution Approach 1:
The backplate is segmented into a first plate at the bending area and a second plate at other areas. The first plate provides necessary strength support to prevent wiring cracking, while its limited extent and selective positioning allow the bending area to still achieve and maintain curvature. The segmentation enables balanced distribution of strength and flexibility.
Solution Approach 2:
The first backplate is selectively disposed only at the bending area with specific dimensions and positioning. This local quality enhancement provides strength exactly where needed to prevent wiring cracking, while the limited scope of the reinforcement allows the overall bending area to maintain its curvature and flexibility characteristics.
Data Source
AI summary
A flexible organic light-emitting display apparatus comprises a substrate comprising a first area including a plurality of pixels, a bending area that is bent and extends from one side of the first area, and a second area that extends from one side of the bending area and faces at least a portion of the first area, and a backplate on a rear of the substrate and in contact with the rear of the substrate and the backplate comprising a bending structure that reduces stress applied to the bending area of the substrate and repulsive force while the bending area of the substrate is bent.