Flexible Substrate Sealing Network for Light Emitting Devices
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Solution Overview
Problem
Existing light emitting devices face challenges in preventing bending of flexible substrates, which can lead to stress on light emitting elements and sealing members, affecting the device's durability and performance.
Innovation Solution
A light emitting device design featuring a flexible substrate with in-line first sealing members and a second sealing member offset in the lateral direction, extending across the gap between the first sealing members, made of transparent resin to enhance adhesion and prevent substrate bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible substrate member is used to enable lightweight and flexible light emitting device, then adaptability and ease of handling are improved, but the substrate member is prone to bending and stress during handling and use
Solution Approach 1:
The second sealing member is arranged in the lateral direction to extend across the gap between the two first sealing members, creating a two-dimensional sealing network. This additional dimensional arrangement provides structural support to prevent substrate bending while maintaining flexibility for handling and storage.
Solution Approach 2:
The device combines multiple sealing members made of different materials (first sealing members and second sealing member) to create a composite sealing structure. This composite arrangement provides both the flexibility needed for handling and the structural integrity to prevent substrate bending and stress.
2Reliability
If sealing members are arranged to seal light emitting elements, then protection and adhesion are improved, but stress concentration can occur at gap areas between sealing members
Solution Approach 1:
The second sealing member bridges the gap area between the two first sealing members, merging the sealing function across the entire lateral direction. This continuous sealing structure eliminates stress concentration at gap areas by providing uniform support and adhesion across the substrate surface.
3Productivity
If roll-to-roll processing is employed for mass production, then productivity is improved, but precise positioning and alignment of sealing members becomes more difficult
Solution Approach 1:
The sealing structure is segmented into multiple independent sealing members (first sealing members and second sealing member) that can be separately positioned and aligned. This segmentation allows for modular assembly during roll-to-roll processing, making it easier to achieve precise alignment while maintaining high production efficiency.
Data Source
AI summary
A light emitting device which can prevent bending of the substrate member. The light emitting device includes a flexible substrate member, a plurality of light emitting elements, two first sealing members, and a second sealing member. The two first sealing members are disposed in-line on the substrate member and arranged in the longitudinal direction. The second sealing member is arranged extending in the longitudinal direction on the substrate member, and is offset in a lateral direction from the two first sealing members. The second sealing member is further arranged to extend across a first gap formed between the two first sealing members when viewed from a lateral direction, and overlap at least a portion of each of the two first sealing members. The second sealing member comprises a resin having transparency to light.