Phosphor Substrate Thermal Management in Light Source Apparatus
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Solution Overview
Problem
Existing light source apparatuses with solid-state light sources and phosphor layers face inefficiencies in heat dissipation, leading to reduced fluorescence production and increased size due to the need for heat dissipating fins.
Innovation Solution
A compact light source apparatus design featuring a thermally connected substrate and support member, which allows efficient heat dissipation of the phosphor layer without a rear surface heat sink, incorporating a light guide system and a light reflection surface to manage heat and prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat dissipating fins are provided on the rear surface of the support substrate to cool the phosphor layer, then cooling efficiency is improved, but the size of the light source apparatus increases
Solution Approach 1:
The invention merges the support substrate and heat dissipation structure into a single integrated component. The support substrate itself is designed with a heat dissipation structure that includes a heat receiving portion contacting the phosphor layer and a heat dissipating portion extending outward, eliminating the need for separate heat dissipating fins and reducing overall apparatus size while maintaining effective cooling.
2Productivity
If the phosphor layer is cooled efficiently, then fluorescence production efficiency is improved, but the structural complexity increases due to additional cooling components
Solution Approach 1:
The support substrate combines multiple functions: mechanical support for the phosphor layer and active heat dissipation through its integrated heat dissipation structure. This merger reduces the number of separate cooling components needed, simplifying the overall system while maintaining efficient cooling for high fluorescence production.
Solution Approach 2:
The support substrate serves dual purposes: it provides structural support for the phosphor layer and simultaneously acts as a heat dissipation device through its heat receiving and heat dissipating portions. This multi-functionality reduces system complexity while ensuring efficient cooling for optimal fluorescence production.
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 solution enables efficient cooling of the phosphor layer, reducing the size of the light source apparatus and preventing contamination, thus maintaining light conversion efficiency and preventing damage to the phosphor layer.
Implementation Method 1
a wavelength conversion element provided on the optical path of the excitation light having passed through the light guide system and including a phosphor layer
Implementation Method 2
The substrate is thermally connected to the support member
Data Source
AI summary
A light source apparatus includes a light emitter that emits excitation light, a support member having an accommodation space on the optical path of the excitation light, a light guide system provided on the optical path in the accommodation space, and a wavelength conversion element provided on the optical path of the excitation light having passed through the light guide system and including a phosphor layer, a substrate that supports the phosphor layer, and a light reflection surface provided between the phosphor layer and the substrate. The substrate is so supported by the support member that the phosphor layer faces the light guide system. The substrate is thermally connected to the support member, and the support member includes a light exit section that transmits fluorescence emitted from the phosphor layer.