Wavelength Conversion Device Heat Dissipation Plate Gap Design
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Solution Overview
Problem
Current laser projectors face inadequate heat dissipation efficiency due to increasing energy density of the laser light source, which affects the performance of the phosphor wheel.
Innovation Solution
A wavelength conversion device is designed with a main body, wavelength conversion layers, a heat dissipation plate, heat conducting components, and a driving unit, where the heat conducting component connects the main body to the heat dissipation plate, enhancing heat dissipation area and preventing overheating of the driving unit by maintaining a gap between the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipation disk with openings is disposed between the phosphor wheel and the heat dissipation structure, then heat dissipation is improved through air flow, but the heat dissipation efficiency becomes insufficient when laser energy density increases
Solution Approach 1:
A heat conducting component (heat dissipation protrusion) is introduced as an intermediary between the phosphor wheel and the heat dissipation plate, directly conducting heat away from the phosphor wheel. This mediator transfers thermal energy more effectively than air convection alone, resolving the insufficiency of the opening-based heat dissipation design under high energy density conditions.
Solution Approach 2:
The patent replaces the convection-based heat dissipation mechanism (air flow through openings) with a conduction-based mechanism (heat conducting component). This substitution provides more reliable and efficient heat transfer that is not dependent on air flow dynamics, thereby meeting the heat dissipation requirements under increased laser energy density.
2Device complexity
If the heat conducting component is connected closely to the driving unit for compact design, then device compactness is improved, but the driving unit overheats and becomes ineffective
Solution Approach 1:
The heat conducting component is strategically positioned to extract heat from the phosphor wheel while maintaining a gap with the driving unit. This extraction approach removes the harmful thermal influence from the driving unit's vicinity, allowing compact design without compromising the driving unit's thermal stability and effectiveness.
Solution Approach 2:
The heat that would otherwise harm the driving unit is redirected through the heat conducting component to the heat dissipation plate. By converting the potentially harmful thermal energy into a controlled heat dissipation pathway, the design achieves compactness while protecting the driving unit from overheating.
3Volume of stationary object
If the heat dissipation plate is placed close to the main body to reduce volume, then the projector size is reduced, but heat dissipation area is insufficient
Solution Approach 1:
The heat conducting component extends in the radial direction from the phosphor wheel to the heat dissipation plate, utilizing the thickness dimension of the phosphor wheel to create an efficient heat conduction pathway. This dimensional approach allows effective heat dissipation without increasing the overall projector volume.
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 significantly improves heat dissipation efficiency, allowing for effective management of heat without enlarging the projector's size, thus reducing its volume and maintaining the driving unit's effectiveness.
Implementation Method 1
The heat conducting component is connected between the heat dissipation plate and the main body
Implementation Method 2
a phosphor powder adhesive layer is coated on the reflective layer to constitute a phosphor wheel, and the laser beam emitted by the laser light source device excites the phosphor powder adhesive layer on the metal substrate of the phosphor wheel so as to generate light beam in different colors
Data Source
AI summary
A wavelength conversion device includes a main body, at least one wavelength conversion layer, at least one heat dissipation plate, a heat conducting component and a driving unit. The wavelength conversion layer is disposed on the main body. The heat dissipation plate is disposed on a side of the main body with an interval. The heat conducting component is connected between the heat dissipation plate and the main body. The driving unit is connected to the main body and the heat dissipation plate and adapted to drive the main body and the heat dissipation plate to rotate. The driving unit and the heat conducting component have a gap therebetween. In addition, a projector including the wavelength conversion device is also provided. The wavelength conversion device according to the disclosure has good heat dissipation efficiency.