Wavelength Conversion Device Turbulent Elements Heat Dissipation
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Solution Overview
Problem
The wavelength conversion layer in projectors experiences reduced luminous efficiency at elevated temperatures, necessitating improved heat dissipation performance to maintain efficiency.
Innovation Solution
A wavelength conversion device with a substrate and a wavelength conversion component that includes a wavelength conversion layer and turbulent elements protruding from it, enhancing heat dissipation and wavelength conversion efficiency by creating turbulence during rotation, where the height of each turbulent element is less than half the distance between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the wavelength conversion layer operates at high temperature, then the projector can maintain compact size and simple structure, but the luminous efficiency drops sharply when temperature exceeds 150°C
Solution Approach 1:
The wavelength conversion layer is segmented into multiple layers with different phosphor materials having different color conversion characteristics and thermal properties. This segmentation allows each layer to operate at optimized temperatures, preventing the overall system from dropping efficiency when temperature exceeds 150°C.
Solution Approach 2:
Different regions of the wavelength conversion layer are assigned different phosphor compositions and particle sizes to create local quality variations. This allows specific areas to handle high-temperature regions while other areas maintain efficient conversion at lower temperatures, overall improving thermal management.
2Ease of manufacture
If conventional flat wavelength conversion layer is used, then the structure is simple and easy to manufacture, but heat dissipation performance is insufficient
Solution Approach 1:
The conventional flat two-dimensional wavelength conversion layer is transformed into a three-dimensional multi-layer structure with varying depths and phosphor distributions. This dimensional change increases the effective surface area for heat dissipation while maintaining manufacturing feasibility through layered deposition processes.
Solution Approach 2:
The wavelength conversion layer incorporates porous structures or void spaces between phosphor particles and between layers. These porous regions act as thermal pathways, improving heat dissipation from the phosphor materials to the substrate while maintaining the overall structural integrity and manufacturability.
3Quantity of substance
If wavelength conversion layer thickness is increased, then more phosphor material can be used for better conversion, but heat dissipation becomes more difficult
Solution Approach 1:
Instead of using a single thick layer, the total phosphor material quantity is distributed across multiple thinner layers. This segmentation reduces the thermal path length in each layer, improving heat dissipation efficiency while maintaining the total quantity of phosphor material needed for optimal wavelength conversion.
Solution Approach 2:
The design transitions from a single thick layer to a multi-layer three-dimensional structure. This allows the same total phosphor quantity to be distributed over increased vertical space, reducing the effective thickness of individual layers and improving thermal conductivity pathways to the substrate.
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 achieves better heat dissipation and wavelength conversion efficiency, with experimental data showing a 2-3% higher brightness in a laser projector compared to conventional designs without turbulent elements.
Implementation Method 1
the wavelength conversion device is disposed on an optical path of the illumination beam and adapted to convert the illumination beam into converted beams with different wavelengths
Implementation Method 2
at least two wavelength conversion turbulent elements are disposed on the wavelength conversion layer and protrude from the wavelength conversion layer
Data Source
AI summary
A wavelength conversion device, adapted for converting the wavelength of an incident illumination beam, includes a substrate and a wavelength conversion component. The wavelength conversion component is disposed on the substrate and includes a wavelength conversion layer and at least two wavelength conversion spoilers. The at least two wavelength conversion spoilers are disposed on the wavelength conversion layer, protrude from the wavelength conversion layer, and expose part of the wavelength conversion layer, and the height of each of the at least two wavelength conversion spoilers is less than half of the distance between the at least two wavelength conversion spoilers. The wavelength conversion device in the disclosure has good heat dissipation efficiency. A projector including the wavelength conversion device is further provided in the disclosure. Manufacturing methods of the wavelength conversion device are further provided in the disclosure.