Phosphor Wheel Thermal Management via Conductive Adhesive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional phosphor wheel apparatuses face challenges in efficiently cooling heated phosphors, leading to decreased fluorescence conversion efficiency and reliability, especially when high-energy light is incident, as existing cooling methods do not adequately address thermal management.
Innovation Solution
A phosphor wheel apparatus featuring a substrate made of a heat conductive material with a phosphor layer and adhesive layer containing filler particles with high thermal conductivity, along with fins on the substrate's surface to enhance heat dissipation and light reflectance, allowing for efficient cooling of the phosphor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cooling methods are used for phosphor, then device complexity is reduced, but heat dissipation efficiency is insufficient leading to temperature rise
Solution Approach 1:
The patent combines the adhesive layer with thermal conduction filler particles to create a multi-functional layer that simultaneously bonds the phosphor to the substrate and conducts heat away from the phosphor. This merging of bonding and cooling functions into a single layer reduces device complexity while improving heat dissipation efficiency.
Solution Approach 2:
The adhesive layer is designed to serve multiple functions: mechanical bonding between phosphor and substrate, thermal conduction pathway for heat dissipation, and structural support. This multi-functionality eliminates the need for separate cooling components, achieving efficient cooling with simple configuration.
2Power
If high-energy light is incident on phosphor to increase output power, then brightness is improved, but temperature rise increases leading to decreased fluorescence conversion efficiency
Solution Approach 1:
The patent converts the harmful heat energy that would otherwise reduce fluorescence efficiency into a beneficial cooling mechanism. The thermally conductive filler particles in the adhesive layer capture and conduct away the heat generated by high-energy light incidence, allowing the system to maintain high output power without sacrificing fluorescence conversion efficiency.
3Loss of energy
If conventional adhesive without thermally conductive filler is used, then manufacturing is simpler, but heat conduction from phosphor is insufficient
Solution Approach 1:
The patent changes the thermal conductivity parameter of the adhesive by incorporating thermally conductive filler particles. This material parameter modification transforms the adhesive from a simple bonding agent into an effective thermal management component, enabling efficient heat conduction while maintaining ease of manufacture through standard adhesive application processes.
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 described configuration effectively cools the phosphor with a simple setup, improving efficiency and reliability by reducing temperature-related efficiency drops and eliminating the need for additional reflective layers, thus maintaining high performance even under high-power excitation.
Implementation Method 1
The adhesive layer includes an adhesive having first thermal conductivity and filler particles, and the filler particles have second thermal conductivity higher than the first thermal conductivity
Implementation Method 2
the filler particles have second thermal conductivity higher than the first thermal conductivity, and have a second light reflectance higher than the first light reflectance
Implementation Method 3
a phosphor that generates yellow light from blue light
Data Source
AI summary
A phosphor wheel apparatus includes: a substrate made of a heat conductive material having a first light reflectance, the substrate having first and second surfaces facing each other; a phosphor layer disposed on the first surface of the substrate; an adhesive layer bonding the substrate and the phosphor layer to each other; and a plurality of fins disposed on the second surface of the substrate, wherein the adhesive layer includes an adhesive having first thermal conductivity and filler particles, and the filler particles have second thermal conductivity higher than the first thermal conductivity, and have a second light reflectance higher than the first light reflectance.