Wavelength Conversion Element Flow Guiding Structures Heat Dissipation
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Solution Overview
Problem
Existing fluorescent color wheels in projection devices suffer from poor heat dissipation efficiency, leading to counterweight glue cracking and reduced durability due to high temperatures.
Innovation Solution
A wavelength conversion element with a fixed ring featuring flow guiding structures, including first and second flow guiding holes and a spoiler surface, enhances heat dissipation by allowing airflow to remove heat energy from the substrate and fixed ring during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the substrate is made of material with better thermal conductivity to dissipate heat from the phosphor layer, then heat dissipation capacity is improved, but the overall heat dissipation efficiency remains poor due to limited substrate capacity
Solution Approach 1:
The fixed ring is segmented into multiple flow guiding structures, each with first and second flow guiding holes arranged in different directions. This segmentation allows heat to be dissipated through multiple pathways simultaneously, significantly improving overall heat dissipation efficiency while preventing localized overheating that would compromise durability
Solution Approach 2:
The invention transitions from two-dimensional heat dissipation (through the substrate plane) to three-dimensional heat dissipation by adding vertical flow guiding holes through the fixed ring. The first flow guiding holes extend from the first surface to the second surface, creating airflow channels in the thickness direction, while spoiler surfaces extend in the radial direction, forming a three-dimensional heat dissipation network
2Productivity
If the fluorescent color wheel operates continuously under excitation light beam, then projection function is maintained, but heat accumulation causes counterweight glue to crack and fall off
Solution Approach 1:
The flow guiding structures enable continuous heat dissipation throughout operation. The multiple flow guiding holes and spoiler surfaces create sustained airflow channels that continuously remove heat generated during continuous projection operation, preventing heat accumulation that would cause counterweight glue failure
Solution Approach 2:
The invention utilizes pneumatic principles by introducing airflow through the flow guiding holes to actively cool the system. The first and second flow guiding holes create pressure differential-driven airflow that passes through the fixed ring, using fluid dynamics to remove heat and protect the counterweight glue from thermal degradation
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
Improves heat dissipation efficiency and durability of the projection device by effectively removing heat energy through airflow, preventing counterweight glue cracking and extending device lifespan.
Implementation Method 1
the airflow would flow through the flow guiding space between the substrate and the fixed ring by the second flow guiding hole and the first flow guiding hole to take away the heat energy of the fixed ring and the substrate accumulated around the flow guiding space
Data Source
AI summary
A wavelength conversion element includes a substrate, a wavelength conversion layer and a fixed ring. The fixed ring has a first surface, a second surface, and a plurality of flow guiding structures. The second surface has a first region and a second region. The plurality of flow guiding structures is located on the first surface, and each of the plurality of flow guiding structures is formed with a first flow guiding hole. The first flow guiding hole extends from the first surface to the second region of the second surface. The plurality of flow guiding structures respectively have a spoiler surface, the spoiler surface stands on the first surface and has a second flow guiding hole, in which the second flow guiding hole and the first flow guiding hole of each of the plurality of flow guiding structures face different directions. A projection device of the invention is further provided.