Wavelength-Converting Module Heat Dissipation via External Fins
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Solution Overview
Problem
Laser projectors face heat dissipation challenges due to inefficient heat transfer from the phosphor color wheel, leading to increased temperatures that can reduce the lifespan of components and cause sudden shutdowns, and conventional solutions like heat-dissipating fins or fans compromise miniaturization efforts.
Innovation Solution
A wavelength-converting module with a bracket and heat-dissipating fin set that exposes heat-dissipating fins outside the casing, allowing direct heat conduction and dissipation, reducing the need for additional cooling elements and enabling miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat-dissipating fins are added to the casing, then heat dissipation is improved, but the device volume increases and heat transfer efficiency remains poor
Solution Approach 1:
The heat-dissipating fins are extracted from the interior of the casing and positioned on the exterior surface. This allows the fins to be directly exposed to the external environment for efficient heat dissipation without occupying internal space, thereby improving heat dissipation efficiency while avoiding increased device volume.
Solution Approach 2:
The casing serves as an intermediary structure that conducts heat from the internal components (phosphor wheel, motor, light sensor) to the external heat-dissipating fins. The casing's thermal conductivity enables effective heat transfer from the heat source to the heat dissipation surface, resolving the heat transfer efficiency issue.
2Temperature
If a fan is installed for heat dissipation, then heat dissipation is improved, but the device volume increases
Solution Approach 1:
The active cooling fan is removed from the system and replaced with passive heat-dissipating fins on the casing exterior. This extraction of the fan eliminates the need for additional internal space dedicated to active cooling components, achieving heat dissipation without increasing device volume.
Solution Approach 2:
The heat-dissipating fins provide passive cooling that operates without external power or moving parts. The structure itself serves the heat dissipation function through natural convection and radiation, eliminating the need for a fan and the associated volume requirements.
3Volume of stationary object
If the casing volume is reduced for miniaturization, then device size is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The heat dissipation function is moved from the internal three-dimensional space to the external surface of the casing. By utilizing the exterior surface area for heat dissipation rather than internal volume, the design achieves effective cooling while maintaining a compact internal structure for miniaturization.
Solution Approach 2:
The casing serves multiple functions simultaneously: it provides structural enclosure for the internal components and acts as a heat conduction path to the external heat-dissipating fins. This multi-functionality allows the same structure to support both miniaturization and effective heat dissipation.
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
Effectively reduces the temperature of critical components, preventing thermal damage and maintaining normal operation while minimizing the device's volume, thus achieving efficient heat dissipation and miniaturization in light source devices and projection apparatuses.
Implementation Method 1
the heat generated by the motor and the wavelength-converting wheel while working can be can be directly conducted to the heat-dissipating fins via the carrying portion
Implementation Method 2
further dissipated by the air outside of the casing
Implementation Method 3
further dissipated by the air outside of the casing
Implementation Method 4
part of the energy of the blue light is converted into heat
Implementation Method 5
the phosphor powder on the color wheel is excited by the blue light to generate lights having different wavelength bands
Data Source
AI summary
A projection apparatus includes a light valve, a projection lens, and a light source device. The light source device provides an illumination beam and includes a casing, a light source, and a wavelength-converting module. The casing has an opening portion. The light source device is disposed in the casing and provides an excitation beam. The wavelength-converting module is disposed at the opening portion and includes a bracket, a motor, and a wavelength-converting wheel. Heat-dissipating fin set of the bracket is exposed out of the casing via the opening portion. The motor is disposed on a carrying portion of the bracket. The wavelength-converting wheel is driven to rotate by the motor. The wavelength-converting wheel converts the excitation beam into a conversion beam. The illumination beam includes the conversion beam. The light valve is disposed on a transmissive path of the illumination beam to convert the illumination beam into an image beam.