Projection Lens Module With Enclosed Reflector and Air Cooling
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Solution Overview
Problem
Existing projection lenses in optical projection devices are susceptible to image quality degradation due to dust and uneven temperature distribution, which affects the performance of the device.
Innovation Solution
A projection lens module design that includes an enclosed space formed by a housing and reflector to prevent dust ingress, an air guiding space for temperature equalization using a fan, and a light shading structure to prevent light leakage, ensuring dustproof, heat dissipation, and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the projection lens is used to reflect high energy light beams, then the reflection efficiency is improved, but the temperature of the reflector rises and temperature distribution becomes uneven
Solution Approach 1:
A cooling component is introduced as an intermediary between the reflector and the housing. This cooling component includes a cooling channel that receives cooling liquid, acting as a heat transfer mediator to conduct heat away from the reflector uniformly, thereby resolving the temperature distribution problem while maintaining high reflection efficiency
Solution Approach 2:
The cooling channel is designed to receive and circulate cooling liquid through hydraulic flow. The cooling liquid flows through the cooling channel to continuously remove heat from the reflector, achieving uniform temperature distribution while preserving the reflector's high power reflection capability
2Ease of manufacture
If the housing structure is simplified, then the manufacturing cost is reduced, but dust may fall between the lens assembly and the reflector
Solution Approach 1:
The cooling component serves as an intermediary element that simultaneously provides structural support and dust protection. By positioning the cooling component between the lens assembly and the reflector, it creates a physical barrier that prevents dust from entering the optical path while maintaining a relatively simple overall housing structure
Solution Approach 2:
The cooling component is designed to perform multiple functions: it provides structural support, conducts heat away from the reflector, and acts as a dust barrier. This multi-functionality allows the housing structure to remain simple while effectively preventing dust contamination
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 effectively prevents dust interference and evenly distributes temperatures across the reflector, enhancing image quality by reducing temperature differences and minimizing light leakage.
Implementation Method 1
wind blown by a fan is introduced into the air guiding space to cool the reflector
Data Source
AI summary
A projection lens module including a lens assembly, a reflector, a housing, a light shading structure, a fan, and an air guiding element is provided. The reflector is disposed on an optical axis of the lens assembly. The reflector includes a reflective surface and a shady surface. The housing covers the reflector, and includes a first part and a second part. The first part and the reflective surface of the reflector jointly define an enclosed space, and the second part and at least a part of the shady surface of the reflector jointly define an air guiding space. The light shading structure overlaps the air outlet in a direction of the optical axis. The fan is disposed outside the housing. The air guiding element connects the fan and the housing, and guides the wind blown by the fan to the shady surface, and the wind leaves from the air outlet.