Light Source Housing Cooling Airflow Path Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light source apparatuses face challenges in efficiently cooling the light emitting bodies, such as phosphor wheels, which generate heat when irradiated with excitation light, leading to potential overheating and reduced performance.
Innovation Solution
A light source apparatus design that includes a housing with an inlet and outlet for cooling airflow, positioned to avoid the light path, which effectively cools the light outputting section by directing airflow through a curved path to prevent light leakage and enhance cooling efficiency, while using a phosphor wheel and motor assembly with focused synthetic light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the phosphor wheel is irradiated with a larger amount of excitation light to increase output, then the output of the light source apparatus is increased, but the heat generated by the phosphor wheel increases
Solution Approach 1:
The patent extracts the cooling function from the optical path design by positioning the inlet and outlet openings away from the light path, allowing independent optimization of both light transmission and heat dissipation systems
Solution Approach 2:
The patent introduces cooling airflow as an intermediary medium to transfer heat away from the phosphor wheel, using the airflow path as a mediator between the heat source and the external environment
2Temperature
If the inlet and outlet openings are positioned to face the light path for cooling, then cooling efficiency is improved, but light leakage occurs
Solution Approach 1:
The patent employs asymmetric positioning of the inlet and outlet openings relative to the optical axis, placing them at positions that do not face the light path, thereby creating a spatial separation between the cooling airflow path and the light transmission path
Solution Approach 2:
The patent resolves the conflict by moving the cooling openings to a different spatial dimension or plane that does not intersect with the optical path, allowing both functions to coexist without interference
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 efficiently cools the light emitting body, preventing overheating and improving the reliability and performance of the light source apparatus by ensuring effective heat dissipation without compromising light output.
Implementation Method 1
The phosphor layer is irradiated with the excitation light, and yellow fluorescence is thus generated
Implementation Method 2
a space as a flow path of cooling airflow for cooling down the light outputting section, the cooling airflow being drawn into the inlet and exhausted from the outlet
Data Source
AI summary
A light source apparatus including a light source section including one or more solid light sources capable of emitting light of a predetermined wavelength band as incident light; a light outputting section including a light emitting body to be excited by incident light from the light source section and to emit visible light having a wavelength band longer than a wavelength of the incident light, the light outputting section being capable of emitting synthetic light containing light having the predetermined wavelength band and visible light from the light emitting body; and a housing holding the light source section and the light outputting section, the housing including an inlet and an outlet formed not to face a light path of the incident light from the light source section to the light outputting section.