UV Light Emitting Device Resin Protection via Intermediary Shielding
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Solution Overview
Problem
Light emitting devices that emit ultraviolet light can degrade or decompose their components, leading to potential contamination and reduced reliability due to absorption of ultraviolet radiation by device members.
Innovation Solution
A light emitting device configuration that includes a first light emitting element emitting ultraviolet light and a second light emitting element with a longer wavelength, along with an electronic component having a resin portion, mounted in a specific order on a substrate to minimize degradation, using a cap to extract light and a cover member with high UV resistance to protect the resin portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If ultraviolet light emitting elements are installed on the substrate, then light irradiation capability is improved, but component degradation and decomposition occur due to UV absorption
Solution Approach 1:
A light shielding member is introduced as an intermediary between the ultraviolet light emitting element and the electronic component. This member selectively blocks ultraviolet light while allowing visible light to pass through, preventing UV-induced degradation of the electronic component's resin portion while maintaining the overall light irradiation function of the device
2Adaptability or versatility
If electronic components are mounted on the substrate, then device functionality is improved, but UV light absorption degrades the resin portion
Solution Approach 1:
The light shielding member serves as a protective intermediary that selectively filters ultraviolet light before it reaches the electronic component. The member's material properties allow it to block harmful UV wavelengths while transmitting beneficial visible light, thereby protecting the resin portion from degradation without compromising device functionality
Solution Approach 2:
The light shielding member is positioned specifically between the ultraviolet light emitting element and the electronic component, providing localized protection only where needed. This selective shielding approach ensures that the resin portion of the electronic component is protected from UV damage while other parts of the device continue to receive full-spectrum light irradiation
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
This configuration reduces the risk of component degradation and ensures high-quality, long-term reliability by effectively blocking ultraviolet light from reaching sensitive electronic components, thereby preventing contamination and maintaining device performance.
Implementation Method 1
at least one first light emitting element configured to emit ultraviolet light
Implementation Method 2
cover member with high UV resistance to protect the resin portion
Data Source
AI summary
A light emitting device includes: at least one first light emitting element configured to emit ultraviolet light; at least one second light emitting element configured to emit light with a wavelength longer than that of the ultraviolet light emitted from the at least one first light emitting element; an electronic component including a resin portion on a surface thereof; and a substrate on which the at least one first light emitting element, the at least one second light emitting element, and the electronic component are mounted and disposed in that order along a first direction of the substrate.