Phosphor Wheel Radial Balance Openings Heat Dissipation
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Solution Overview
Problem
Conventional phosphor wheel devices face challenges in achieving rotational balance while maintaining effective heat dissipation, as features like notches can disrupt the heat dissipating properties and lead to increased noise and temperature variations during operation.
Innovation Solution
A phosphor wheel device with a disc-shaped substrate featuring a plurality of radially extending balance openings that optimize rotational balance and heat dissipation, ensuring that the heat dissipation area is preserved by maintaining a significant portion of the substrate's surface area for heat dissipation, even with the presence of these openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a notch is provided in the substrate to achieve rotational balance, then rotational balance is improved, but heat dissipating properties deteriorate
Solution Approach 1:
The single notch is segmented into multiple balance openings (first, second, third openings) distributed around the substrate. This segmentation allows the total opening area to be reduced while maintaining rotational balance, as the balance effect is distributed across multiple smaller openings rather than concentrated in one large notch.
Solution Approach 2:
The balance openings are positioned at specific locations around the substrate perimeter, creating local balance adjustments rather than a large central notch. This local approach minimizes the impact on overall heat dissipation area while achieving the required rotational balance through strategic placement of smaller openings.
2Temperature
If the intensity of excitation light is reduced to maintain heat dissipating properties, then heat dissipating properties are improved, but luminous output decreases
Solution Approach 1:
By segmenting the balance feature into multiple smaller openings, the patent maintains more total substrate area for heat dissipation compared to a single large notch. This allows excitation light intensity to be maintained at higher levels, preserving luminous output while still achieving rotational balance through the distributed opening configuration.
3Stability of the object's composition
If balance openings are provided to achieve rotational balance, then rotational balance is improved, but noise generation increases
Solution Approach 1:
The balance feature is divided into multiple smaller openings rather than one large notch. This segmentation reduces the individual opening size and distributes the air displacement across multiple locations, thereby reducing turbulence-induced noise while maintaining the overall balance function.
Solution Approach 2:
The balance openings are positioned at specific locations around the substrate, allowing precise control over air flow patterns. By strategically placing these openings, the design minimizes turbulent air flow and noise generation while achieving the required rotational balance.
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 effectively maintains heat dissipation and reduces noise generation by ensuring that the substrate's surface area for heat dissipation is minimally affected, achieving better thermal management and noise reduction compared to traditional designs.
Implementation Method 1
maintaining the heat dissipating properties... heat dissipation area is preserved... better thermal management
Data Source
AI summary
A phosphor wheel device includes a phosphor and a substrate which has a disc shape and on which the phosphor is provided, and the phosphor is provided in at least a portion of a circumference of a circle on the substrate. The circle is centered on the center of a rotational shaft of the substrate. The substrate includes a first opening and a plurality of second openings, and the plurality of second openings extend radially with respect to the center of the rotational shaft.