Phosphor Wheel Substrate Segmentation for Thermal Management
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Solution Overview
Problem
Conventional phosphor wheel modules in projection display apparatuses face challenges in heat conductivity, leading to increased local temperature rises and reduced cooling efficiency, which affects the luminance and size of the system.
Innovation Solution
A phosphor wheel module design featuring a substrate with a phosphor region, ventilation region, and heat conduction region, where the ventilation region is closer to the rotation center and the heat conduction region is farther away, incorporating a plurality of openings and fins to enhance air convection and reduce heat conductivity losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air vents are added to improve cooling, then heat dissipation improves, but substrate heat conductivity decreases
Solution Approach 1:
The substrate is segmented into distinct functional regions: a ventilation region with multiple air vents for heat dissipation, a phosphor region for light emission, and a heat conduction region for thermal management. This segmentation allows each region to optimize its specific function without compromising the others.
Solution Approach 2:
Different regions of the substrate are given different properties: the ventilation region has high porosity for air flow, the heat conduction region has high thermal conductivity for heat transfer, and the phosphor region is optimized for phosphor coating. This local differentiation resolves the contradiction by allowing heat vents where needed while preserving heat conductivity where required.
2Temperature
If phosphor wheel size is increased to improve heat dissipation, then cooling efficiency improves, but system size increases
Solution Approach 1:
The invention changes the structural parameters of the substrate by introducing a ventilation region with controlled air vent distribution and a heat conduction region with optimized thermal pathways. This allows effective heat dissipation without increasing the overall phosphor wheel dimensions, as the cooling is achieved through internal structural optimization rather than size increase.
3Temperature
If ventilation region is added closer to rotation center, then heat quenching improves, but substrate structure complexity increases
Solution Approach 1:
The substrate is divided into functionally distinct segments: a ventilation region with air vents positioned closer to the rotation center for efficient heat quenching, a phosphor region for light generation, and a heat conduction region for thermal management. This segmentation achieves improved heat quenching while maintaining relatively simple manufacturing by using clearly defined regional zones.
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 improves heat quenching characteristics, reducing local temperature rises and maintaining high luminance without increasing the phosphor wheel's size, thus enhancing the performance of light source devices and projection display apparatuses.
Implementation Method 1
The ventilation region includes a plurality of openings that is located closer to the rotation center of the substrate than the phosphor region
Implementation Method 2
The heat conduction region is located farther away from the rotation center of the substrate than the phosphor region
Implementation Method 3
the phosphor region includes a phosphor that is disposed on at least a part of a circumference of a circle with a first radius from a rotation center of the substrate
Data Source
AI summary
A phosphor wheel module includes a substrate and a phosphor region disposed on a surface of the substrate. The phosphor region includes a phosphor that is disposed on at least a part of a circumference of a circle with a first radius from a rotation center of the substrate. The substrate includes a ventilation region and a heat conduction region. The ventilation region includes a plurality of openings that is located closer to the rotation center of the substrate than the phosphor region. The heat conduction region is located farther away from the rotation center of the substrate than the phosphor region.