Projector Light Source Unit Heat Dissipation via External Motor
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Solution Overview
Problem
Current light source units in projectors face challenges in heat dissipation, particularly with the luminescent material wheel and motor, leading to potential overheating and mechanical issues due to limited cooling capabilities, especially when the light source unit has high brightness.
Innovation Solution
A light source unit design incorporating a support member, heat transfer member, and heat dissipating member within a case and cover configuration, which extends heat dissipation from the inside to the outside via a space sandwiched by the case and cover, enhanced by a cooling fan control system and temperature detection for efficient heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source unit is designed with high brightness, then the illumination intensity is improved, but the heat generation increases causing the motor temperature to rise and potential breakage
Solution Approach 1:
The patent extracts the motor from the sealed light source case and positions it externally, where it can be directly cooled by air flow. This separation allows the light source case to maintain its dustproof sealed structure while the motor operates in a cooled environment, resolving the contradiction between high brightness operation and motor temperature control
Solution Approach 2:
The patent introduces a heat dissipation member as an intermediary between the motor and the external environment. This heat dissipation member conducts heat away from the motor and dissipates it to the surrounding air, enabling the motor to operate at high temperatures without overheating while maintaining compact dimensions
2Reliability
If the motor is mounted inside the sealed light source case for dustproofness, then the dust resistance is improved, but the cooling performance deteriorates due to limited air flow
Solution Approach 1:
The patent segments the system into two distinct parts: a sealed light source case that maintains dustproofness and an external motor mounting area that provides cooling. The light source case remains hermetically sealed while the motor is positioned outside where air flow can effectively cool it, resolving the contradiction between dustproofness and cooling performance
Solution Approach 2:
The patent changes the spatial arrangement by moving the motor from the internal three-dimensional space of the sealed case to an external position where it can access cooling air flow. This dimensional repositioning allows the motor to operate in a different thermal environment while the light source case maintains its sealed structure
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
This configuration significantly improves heat dissipation performance, reducing the risk of overheating and extending the lifespan of the motor and surrounding components, while maintaining dustproofness and efficient cooling even in compact designs.
Implementation Method 1
a heat transfer member connected to the support member, and a heat dissipating member connected to the heat transfer member
Implementation Method 2
The heat dissipating member is arranged to extend from the inside of the space to an outside of the space via a space sandwiched by the case and the cover
Implementation Method 3
heat dissipating member connected to the heat transfer member all of which are provided inside a space formed by a case and a cover
Data Source
AI summary
A light source unit according to an embodiment comprises: a support member that supports a heat generator, a heat transfer member connected to the support member, and a heat dissipating member connected to the heat transfer member all of which are provided inside a space formed by a case and a cover. The heat dissipating member is arranged to extend from the inside of the space to an outside of the space via a space sandwiched by the case and the cover.