Projector Polygonal Mirror Cooling Fan Integration
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Solution Overview
Problem
Existing projectors face challenges in cooling their heat-generating components, leading to increased size and inefficiencies due to the need for separate cooling apparatus, which affects the projector's compactness and display quality.
Innovation Solution
A projector design that incorporates a light source apparatus with a rotating transmissive optical part and a fan system to displace the optical path of light and generate airflow for cooling, reducing the need for separate cooling apparatus and enhancing compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a separate cooling apparatus is provided to cool the liquid crystal light valve, then the cooling effect is improved, but the size of the apparatus configuration increases
Solution Approach 1:
The patent combines the cooling function with the existing optical scanning mechanism by integrating a fan into the polygonal mirror assembly. The fan is positioned to generate airflow that passes through the liquid crystal light valve, merging the cooling function with the optical path displacement function, thereby eliminating the need for a separate cooling apparatus and reducing overall device size.
Solution Approach 2:
The polygonal mirror assembly is given multiple functions: it continues to scan the optical path while also housing a fan that provides cooling functionality. This multi-functional design allows the same structural component to serve both optical scanning and thermal management purposes, avoiding the need for additional dedicated cooling components.
2Temperature
If the light path is displaced to cool the heat generator, then the cooling efficiency is improved, but the optical path control complexity increases
Solution Approach 1:
The patent utilizes periodic rotation of the polygonal mirror to achieve both optical scanning and cooling. As the mirror rotates to different positions in its periodic motion, the fan generates airflow that sequentially passes through different regions of the liquid crystal light valve, providing periodic cooling action that leverages the existing scanning motion rather than requiring independent complex control systems.
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 design effectively cools heat-generating components while maintaining high display quality by ensuring the light is incident on the modulator at optimal angles, reducing brightness and contrast issues, and improving overall projector efficiency.
Implementation Method 1
a first blade part that is coupled to the first transmissive optical part and generates an airflow that cools the first heat generator
Implementation Method 2
a first transmissive optical part that transmits and outputs the light incident from the light source apparatus
Data Source
AI summary
A projector according to the present disclosure includes a light source, a first heat generator, and an optical apparatus that temporally displaces the optical path of the light output from the light source, the optical apparatus including a first transmissive optical part, a first driver that rotates the first transmissive optical part, and a first blade part that is coupled to the first transmissive optical part and generates an airflow that cools the first heat generator, the first transmissive optical part rotating around a first axis of rotation along a second direction that intersects with a first direction in which the light output from the light source is incident on the first transmissive optical part to displace the optical path of the light, and the first driver rotating the first blade part along with the first transmissive optical part to generate the airflow.