Projector Airflow Layout for Light Engine Heat Dissipation
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Solution Overview
Problem
Existing projection devices face issues with rapid decay of optical performance due to increased heat generation from the light engine, affecting projection brightness and device lifespan.
Innovation Solution
A projection device design featuring a housing with air inlet and outlet holes on its bottom wall, a fan-driven cooling airflow system, and radiators for heat dissipation, which includes a first radiator connected to the light source and a second radiator connected to the light modulator, enhancing heat dissipation efficiency and maintaining optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the light engine is increased to form a clear projection picture in a strong-light environment, then the projection brightness is improved, but the light engine generates a lot of heat causing rapid decay of optical performance
Solution Approach 1:
The housing internal space is segmented into multiple independent air flow channels: a first air flow channel for cooling the light engine (with air inlet hole, air outlet hole, and fan) and a second air flow channel for cooling the light source (with separate air inlet hole and radiator). This segmentation allows independent optimization of cooling for each heat-generating component, enabling the light engine to maintain high brightness while being effectively cooled through dedicated airflow paths.
2Temperature
If air inlet and outlet holes are arranged on the bottom wall for cooling, then heat dissipation efficiency is improved, but the appearance consistency and user experience are affected
Solution Approach 1:
The patent replaces traditional visible air inlet/outlet grilles on the housing exterior with an invisible airflow system. The fan-driven air flow channels are designed to operate without requiring external visible vents, substituting mechanical airflow control structures with an internalized cooling system that maintains smooth housing surfaces and consistent appearance from all viewing angles.
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 design improves heat dissipation efficiency, ensures projection brightness, prolongs device lifespan, and maintains user experience by concealing air vents, while reducing noise and turbulence.
Implementation Method 1
The fan is configured to drive cooling airflow entering the housing from the air inlet hole to respectively flow through the first gap and the second gap
Implementation Method 2
The first radiator is connected to the light source in a thermal conductive manner
Implementation Method 3
the cooling airflow...flow towards the first radiator, and to be discharged from the air outlet hole
Data Source
AI summary
A projection device includes a housing and a light engine, a circuit board, and a fan that are arranged in the housing. The bottom wall of the housing is provided with an air inlet hole facing the light engine and an air outlet hole. A first gap is formed between a bottom side of the light engine and the bottom wall of the housing, and in communication with the air inlet hole. The circuit board is arranged on a top side of the light engine. A second gap is formed between the circuit board and the light engine, and in communication with the air inlet hole. The fan is configured to drive cooling airflow entering the housing from the air inlet hole to respectively flow through the first gap and the second gap and then flow towards the first radiator, and to be discharged from the air outlet hole.