Projector Dual Airflow Cooling for Lens and Light Module Heat Dissipation
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Solution Overview
Problem
Conventional projector designs face inefficiencies in heat dissipation for the light emitting module, leading to reduced imaging quality and increased noise due to the reliance on airflow that has passed through the projection lens module, which limits the effectiveness of heat exchange and fan performance.
Innovation Solution
The projector incorporates a dual airflow system where a first airflow dissipates heat from both the projection lens and light emitting modules through a first air inlet and outlet, and a second airflow specifically targets the light emitting module through a second air inlet, enhancing heat dissipation efficiency and maintaining imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light emitting module is arranged on the downstream side of the airflow path to maintain projection lens imaging quality, then the projection lens module imaging quality is preserved, but the heat dissipation efficiency of the light emitting module deteriorates because the airflow has already passed through the projection lens module and cannot effectively exchange heat with the light emitting module
Solution Approach 1:
The patent divides the airflow path into two separate channels: a first airflow path for cooling the projection lens module and a second airflow path for cooling the light emitting module. This segmentation allows each component to have dedicated cooling airflow, preventing the heat dissipation inefficiency that occurs when components share a single airflow path where air has already been heated by upstream components.
2Productivity
If fan speed is increased to increase airflow rate for heat dissipation, then the airflow rate increases, but noise increases and flow resistance increases due to boundary layer growth between fins
Solution Approach 1:
The patent introduces a second airflow path that approaches the light emitting module from a different spatial dimension (from the rear side rather than from the front through the projection lens). This dimensional change in airflow approach allows for effective heat dissipation without requiring excessively high fan speeds, thereby reducing noise and avoiding boundary layer issues.
3Device complexity
If a single airflow path is used for both projection lens and light emitting module cooling, then the structure is simple, but the heat exchange efficiency deteriorates because the airflow cannot effectively cool the light emitting module
Solution Approach 1:
The patent segments the cooling system into two independent airflow paths with separate inlets and outlets. The first airflow path cools the projection lens module while the second airflow path cools the light emitting module. This segmentation resolves the heat exchange inefficiency that occurs in single-path systems while maintaining reasonable structural complexity through modular design.
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 dual airflow system effectively addresses the heat dissipation challenges of the light emitting module, improving its efficiency and maintaining the imaging quality of the projection lens module, while reducing noise and flow resistance.
Implementation Method 1
A first airflow flows into the casing from the first air inlet to dissipate heat from the projection lens module and the light emitting module
Implementation Method 2
A second airflow flows into the casing from the second air inlet to dissipate heat from the light emitting module
Data Source
AI summary
A projector comprises a casing, a projection lens module and a light emitting module. The casing comprises a first air inlet and an air outlet. The projection lens module is disposed in the casing and adjacent to the first air inlet. The light emitting module is disposed in the casing and adjacent to the air outlet. The casing comprises a rear cover. The rear cover comprises a second air inlet, the second air inlet corresponds to the light emitting module. A first airflow flows into the casing from the first air inlet to dissipate heat from the projection lens module and the light emitting module, and then flows out of the air outlet. A second airflow flows into the casing from the second air inlet to dissipate heat from the light emitting module, and then flows out of the air outlet.