Flexible Laminate for Electronic Device Moisture Protection
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Solution Overview
Problem
Existing electronic device apparatuses with organic electroluminescence elements lack sufficient moisture resistance due to their close-sealing structure, which is not adequately protected against water and air.
Innovation Solution
A laminate comprising one or more soft layers with specific flexural modulus and water vapor permeability ranges encloses the electronic device, providing enhanced flexibility and moisture resistance, with the soft layers being made of thermoplastic resins like modified hydrogenated block copolymers and including ultraviolet absorbers for improved protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a close-sealing structure with sealing agent is used to protect electronic devices, then moisture resistance is improved, but flexibility deteriorates
Solution Approach 1:
The patent uses a flexible barrier film as the sealing structure that can be bent and deformed without breaking, providing both moisture resistance and flexibility. The film encapsulates the electronic device while maintaining the ability to conform to curved surfaces and withstand mechanical stress, resolving the contradiction between protection and flexibility.
Solution Approach 2:
The patent employs composite material structures combining barrier layers with flexible substrate materials. This creates a multi-layered sealing system that provides effective moisture protection while maintaining overall flexibility of the encapsulated device assembly.
2Reliability
If rigid sealing structures are used to protect electronic devices, then moisture resistance is improved, but handleability deteriorates
Solution Approach 1:
The flexible barrier film replaces rigid sealing structures, allowing the device to be easily handled, bent, and positioned while maintaining effective moisture protection. The film's flexibility enables intuitive manipulation during installation and use.
3Reliability
If thick sealing layers are used to improve moisture resistance, then protection is improved, but flexibility deteriorates
Solution Approach 1:
The patent achieves effective moisture protection with thin flexible films rather than thick rigid layers. The advanced barrier film material provides sufficient protection against moisture penetration while maintaining thin profile and flexibility, eliminating the need for thick sealing layers.
Solution Approach 2:
Multi-layer composite structures provide enhanced moisture barrier properties in thin configurations, combining different material functions to achieve superior protection without increasing overall thickness or reducing flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The laminate achieves excellent flexibility and moisture resistance, allowing for effective protection of electronic devices from environmental factors while maintaining handleability and transparency.
Implementation Method 1
a water vapor permeability at 40° C. and 90% RH of 15 [g/(m2·24 h)·100 μm] or less
Data Source
AI summary
Disclosed is a laminate which includes one or more soft layers and an electronic device enclosed by the one or more soft layers, wherein the one or more soft layers have a flexural modulus of 80 MPa or more and 1,000 MPa or less and a water vapor permeability at 40° C. and 90% RH of 15 [g/(m2·24 h)·100 μm] or less.