Phosphor Wheel Fin Structure for Better Heat Dissipation
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Solution Overview
Problem
There is a desire to further enhance the heat dissipation performance of phosphor wheels used in laser projectors and other light source devices.
Innovation Solution
A phosphor wheel design featuring a substrate with a phosphor layer and a heat dissipating member that includes a projecting portion and a plurality of fins, where the fins are cut and raised from the peripheral region of the heat dissipating member, and a bent end portion with an obtuse angle, creating a space for airflow and a heat conduction path to improve heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fins are added to the heat dissipating member to improve heat dissipation performance, then heat dissipation performance is improved, but device complexity increases
Solution Approach 1:
The heat dissipating member is segmented into multiple functional regions: a central projecting portion for heat conduction and a peripheral region with multiple fins for heat dissipation. This segmentation allows each part to perform its specific function efficiently, resolving the contradiction by organizing complexity into functional modules.
Solution Approach 2:
The patent merges the heat conduction function (projecting portion) and heat dissipation function (fins) into a single integrated heat dissipating member. This combination reduces the number of separate components while achieving both heat conduction and dissipation, thereby improving heat dissipation performance without proportionally increasing device complexity.
2Temperature
If the heat dissipating member is positioned close to the substrate to improve heat conduction, then heat conduction efficiency is improved, but airflow space is reduced
Solution Approach 1:
The heat dissipating member extends in the vertical dimension with a projecting portion that contacts the substrate for heat conduction, while simultaneously maintaining horizontal spacing through fins that create airflow passages. This dimensional approach allows heat conduction and airflow to occur simultaneously without compromising either function.
Solution Approach 2:
The fins act as intermediary structures that bridge the heat dissipating member and the airflow path. They conduct heat from the substrate contact area while simultaneously creating channels for air circulation, thus mediating between the conflicting requirements of close substrate contact and adequate airflow space.
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 design achieves further improved heat dissipation performance by enhancing airflow and heat conduction, reducing the temperature of the phosphor layer, and potentially reducing manufacturing costs.
Implementation Method 1
the projecting portion contacts the substrate via the contact surface to secure a certain distance between the substrate and the heat dissipating member and conduct heat in the substrate to the peripheral region of the heat dissipating member
Implementation Method 2
dissipation of heat produced in the phosphor can be promoted as the air serving as a cooling medium passes through the clearance space
Data Source
AI summary
A phosphor wheel includes: a substrate including a first principal surface and a second principal surface; a phosphor layer; and a heat dissipating member. The heat dissipating member includes: a projecting portion projecting toward one of the principal surfaces and including a contact surface that contacts the one of the principal surfaces; fins provided by cutting and raising regions in a peripheral region of the heat dissipating member excluding a central portion of the heat dissipating member; and a bent end portion having an obtuse bending angle and provided as a result of an outer edge portion of the heat dissipating member being bent. The projecting portion secures a certain distance between the substrate and the heat dissipating member and conducts heat in the substrate to the peripheral region of the heat dissipating member.