Optical Engine Fan Assembly for Prism Heat Dissipation
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Solution Overview
Problem
In projectors, optical assemblies such as prisms suffer from poor heat dissipation due to natural convection and uneven air distribution, which affects projection quality, especially when coated with black materials that absorb light and exacerbate temperature imbalances.
Innovation Solution
An optical engine module with a casing, light valve, prism assembly, and fan assembly is designed, where the prism assembly is divided into regions with different temperatures and a fan assembly circulates airflow to enhance heat dissipation, using a flow guide to direct airflow from cooler to hotter regions within the accommodating space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the prism assembly is coated with black material to absorb light, then the light absorption capability is improved, but the heat dissipation performance deteriorates and temperature distribution becomes uneven
Solution Approach 1:
The accommodating space is divided into multiple regions (first region with light incident surface, second region with higher temperature) and the fan assembly segments the airflow path to target specific high-temperature zones, enabling localized heat management for the black-coated prism assembly
Solution Approach 2:
The fan assembly acts as an intermediary element that mediates between the heat-generating black-coated prism assembly and the surrounding environment by actively circulating air to transfer heat away from the prism assembly's surface
2Reliability
If the prism assembly dissipates heat only by natural convection in a closed accommodating space, then the airtight sealing is maintained, but the heat dissipation effect becomes poor
Solution Approach 1:
The fan assembly introduces forced convection using airflow to replace the insufficient natural convection, while the airtight casing maintains the sealed environment. The system uses pneumatic principles to circulate air within the closed space for effective heat removal
3Temperature
If the cold and hot air around the prism assembly is unevenly distributed, then the black body coating absorbs more heat, but the projection quality deteriorates
Solution Approach 1:
The cooling system applies local quality by directing airflow specifically to the second region (high-temperature region) of the prism assembly where the black coating generates excessive heat, rather than uniform cooling, thereby locally improving temperature distribution to maintain projection quality
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 improves heat dissipation efficiency and maintains better projection quality by ensuring even temperature distribution and preventing overheating of the black-coated surfaces, thus enhancing the reliability and performance of the projector.
Implementation Method 1
The fan assembly is disposed in the accommodating space, and airflow provided by the fan assembly circulates in the accommodating space
Implementation Method 2
the prism may be disposed in an accommodating space and dissipates heat only by natural convection
Implementation Method 3
the black body also has the problem of poor heat dissipation due to the absorption of light
Data Source
AI summary
The invention provides an optical engine module and a projector including the optical engine module. The optical engine module includes a casing, a light valve, a prism assembly and a fan assembly. The casing has an assembly port. The light valve is disposed at the assembly port and defines an accommodating space with the casing. The prism assembly is disposed in the accommodating space, and the light valve is configured to convert an illumination beam from the prism assembly into an image beam. The prism assembly includes a first region and a second region. The first region includes a light incident surface of the prism assembly, and a temperature of the second region is higher than a temperature of the first region. The fan assembly is disposed in the accommodating space. Airflow provided by the fan assembly circulates in the accommodating space.