Wavelength Converting Device Multi-Surface Heat Dissipation
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Solution Overview
Problem
The existing wavelength converting devices with solid light sources suffer from insufficient heat dissipation, leading to decreased wavelength conversion efficiency and optical output due to heat-induced degradation of the fluorescent material.
Innovation Solution
A wavelength converting device is designed with a heat dissipating member, a wavelength converting member containing fluorescent material and a holding body, and a connecting member made of metal, where the connecting member is thermally connected to both the side and lower surfaces of the wavelength converting member, enhancing heat dissipation paths and using a reflecting layer and interposing layer to improve light extraction and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If heat is dissipated only from the lower surface of the device, then the structure is simple, but sufficient heat dissipation effect cannot be obtained
Solution Approach 1:
The patent transitions from single-surface (lower surface only) heat dissipation to multi-surface (side surfaces and lower surface) heat dissipation by extending the connecting member laterally along the side surfaces of the wavelength converting member, thereby adding dimensional pathways for heat removal
2Ease of manufacture
If the connecting member is thermally connected only to the lower surface, then the manufacturing is simple, but heat dissipation efficiency is insufficient
Solution Approach 1:
The connecting member is divided into multiple thermal connection regions: a first region connected to the lower surface and second regions connected to the side surfaces. This segmentation allows independent optimization of each connection zone while maintaining overall manufacturing feasibility through modular construction
3Device complexity
If the connecting member connects only the lower surface, then the device structure is simple, but wavelength conversion efficiency decreases due to heat degradation
Solution Approach 1:
The patent converts the harmful heat that would otherwise degrade the fluorescent material into a manageable thermal flow by providing dedicated heat extraction pathways through the connecting member's extended side surface connections, thereby protecting the wavelength converting member while maintaining structural integrity
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 effectively reduces heat-induced degradation and maintains high light extraction efficiency, extending the lifetime of the light source and wavelength converting member while ensuring reliable heat dissipation.
Implementation Method 1
The connecting member is thermally connected to the side surfaces and the lower surface of the wavelength converting member
Implementation Method 2
The wavelength converting member contains a fluorescent material
Data Source
AI summary
A wavelength converting device includes a heat dissipating member, a wavelength converting member, and a connecting member. The wavelength converting member is disposed on the heat dissipating member and contains a fluorescent material and a holding body including aluminum oxide, magnesium oxide, zirconium oxide, lutetium oxide, titanium oxide, chromium oxide, tungsten oxide, divanadium pentoxide, molybdenum trioxide, sodium oxide, yttrium oxide, silicon dioxide, boron oxide, or diphosphorus pentoxide. The connecting member contains a metal material and connecting the heat dissipating member and the wavelength converting member. The wavelength converting member includes an upper surface, side surfaces, and a lower surface. The connecting member is thermally connected to the side surfaces and the lower surface of the wavelength converting member.