Projection Lens Thermal Layout for Brightness and Low Fan Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of heat dissipation in projection apparatuses with high brightness light sources and light valves is exacerbated by increased wattage and lens count, leading to reduced heat dissipation space and noise generation.
Innovation Solution
A projection apparatus design featuring a casing with specific air inlets and outlets, fans, and heat dissipation modules with heat pipes and fin sets arranged to improve airflow efficiency and reduce noise, including fans positioned downstream of heat dissipation elements to enhance cooling and sound shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the wattage of the light source is increased to achieve high brightness, then the brightness is improved, but the heat generated by the light source increases
Solution Approach 1:
The patent introduces heat dissipation fins as an intermediary component between the light source and the surrounding environment. These fins act as a thermal mediator that facilitates heat transfer from the high-wattage light source to the air, enabling the system to maintain high brightness while effectively managing the generated heat through enhanced convection and radiation surfaces.
2Measurement precision
If the number of lenses inside the projection lens is increased to achieve high resolution, then the resolution is improved, but the length of the projection lens increases
Solution Approach 1:
The patent employs a nested arrangement where multiple lenses are positioned within a compact optical path structure. The lenses are arranged in a nested configuration that allows them to occupy overlapping or adjacent spatial regions, enabling high resolution through multiple lens elements while minimizing the overall length of the projection lens assembly.
3Measurement precision
If the number of lenses is increased, then the resolution is improved, but the heat dissipation space inside the system is compressed
Solution Approach 1:
The patent transitions the heat dissipation structure from a two-dimensional planar arrangement to a three-dimensional extended structure with heat dissipation fins protruding in multiple directions. This dimensional change creates additional heat dissipation surfaces without increasing the footprint area, thereby providing adequate heat dissipation space even with an increased number of lenses in the compact projection lens assembly.
4Temperature
If fans are used to enhance heat dissipation, then the heat dissipation efficiency is improved, but the noise generated by the fan increases
Solution Approach 1:
The patent partially replaces the mechanical fan-based heat dissipation system with passive heat dissipation structures including heat dissipation fins and convection channels. This substitution reduces reliance on high-speed fan operation, thereby maintaining effective heat dissipation through thermal conduction and natural convection while significantly reducing the noise generated by mechanical fan rotation.
5Length of moving object
If the distance between the rear cover and the projection wall is reduced, then the projection distance is shortened, but the heat dissipation space is compressed
Solution Approach 1:
The patent employs thin-film heat dissipation structures and flexible thermal management components that can be integrated into the compact space between the rear cover and projection wall. These thin-film structures provide effective heat dissipation surfaces without occupying significant volume, enabling short projection distance while maintaining adequate heat dissipation capacity through high surface-area-to-volume ratio designs.
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 achieves improved heat dissipation efficiency and reduces fan noise by at least 4 dB, optimizing space utilization and user experience.
Implementation Method 1
The first heat pipe is connected to the first base of the first light source module and the first heat dissipation fin set
Implementation Method 2
The first heat dissipation fin set is disposed adjacent to the first air inlet, and in an axial direction of the first fan
Implementation Method 3
The first heat dissipation fin set is disposed adjacent to the first air inlet, and in an axial direction of the first fan
Implementation Method 4
The first fan, the first light source module, the second light source module, the first heat dissipation module, and the second heat dissipation module are located in the first region
Data Source
AI summary
A projection apparatus includes a casing, a projection lens, a first fan, a first light source module, a second light source module, a first heat dissipation module, and a second heat dissipation module. A disposing direction of the projection lens divides an accommodating space of the casing into a first region and a second region. The first fan, the first light source module, the second light source module, the first heat dissipation module, and the second heat dissipation module are located in the first region. The first heat dissipation module includes a first heat dissipation fin set and a first heat pipe. The first heat pipe is connected to the first base of the first light source module and the first heat dissipation fin set. The first heat dissipation fin set is disposed adjacent to a first air inlet, and in an axial direction of the first fan.