Power Source Board Segmentation for Projector Cooling
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Solution Overview
Problem
Conventional image projection apparatuses face challenges with heat management in power source boards, leading to reduced performance and durability, and require larger spaces due to the need for extensive air cooling systems that increase noise and power consumption.
Innovation Solution
The apparatus is designed with a compact configuration where the power source unit is divided into multiple boards, with the light source and power source unit arranged in directions parallel to the projection plane, allowing for efficient airflow and cooling without the need for large fans, thereby reducing noise and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the rotation number of the air blowing unit is raised to cool the downstream side of the PFC power source board, then the cooling performance is improved, but the wind noise and power consumption increase
Solution Approach 1:
The PFC power source board is divided into multiple sections with different cooling requirements. The air blowing unit is positioned to target specific high-heat areas rather than attempting to cool the entire board uniformly, allowing for lower overall fan speed while maintaining effective cooling where needed.
Solution Approach 2:
A heat dissipation structure (heat sink or thermal conduction path) is introduced as an intermediary between the electrical elements and the air flow. This intermediary captures heat from critical components and transfers it to the air flow more efficiently, reducing the need for high-velocity air flow.
2Temperature
If a large fan is used to cool the downstream side of the PFC power source board, then the cooling performance is improved, but the apparatus size increases
Solution Approach 1:
The air blowing unit and cooling structures are nested within the existing apparatus configuration. The fan is integrated into the housing structure, and cooling channels are routed through available spaces, allowing effective cooling without increasing the overall apparatus volume.
Solution Approach 2:
The cooling approach transitions from horizontal air flow (requiring large fan area) to vertical or multi-directional air flow patterns that utilize the third dimension. This allows compact fan placement while maintaining adequate cooling coverage through strategic air flow path design.
3Temperature
If the air flow path is made large to cool the PFC power source board, then the cooling performance is improved, but the apparatus enlarges
Solution Approach 1:
Thin heat dissipation fins or thermal conduction films are used to maximize surface area for heat transfer within a compact volume. These thin structures provide large heat exchange area without significantly increasing the apparatus volume, enabling effective cooling in a compact space.
4Temperature
If the PFC power source board is arranged in an open space, then the cooling performance is improved, but the apparatus layout becomes complex and space is wasted
Solution Approach 1:
The PFC power source board is integrated with other apparatus components rather than being placed in a separate open space. The board is mounted on existing structural elements, and cooling air flow paths are combined with other ventilation requirements, simplifying the overall layout while maintaining cooling effectiveness.
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 design effectively cools the power source boards, reduces noise and power consumption, and allows for a more compact and efficient image projection system that does not obstruct space.
Implementation Method 1
Japanese Patent Application Laid-open No. 2007-78924 discloses an image projection apparatus for blowing air to the PFC power source board to cool the PFC power source board by air
Data Source
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AI summary
An image projection apparatus includes a light source, light from which is used to form an image to be projected, a first flow path, a control unit configured to control a light emission from the light source, an electrical power stabilizing unit configured to stabilize an electrical power to be supplied to the light source, and an electrical power source unit configured to supply the electrical power to at least one of the control unit and the electrical power stabilizing unit. One or both of the electrical power source unit and the electrical power stabilizing unit is/are divided into a plurality of boards. The light source is arranged on a normal line of a surface of any of the plurality of boards. The plurality of boards configure surfaces of the first flow path except a surface nearest to the light source.