Shiftable Fluorescent Material for Laser Projector Light Source
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light source devices using laser and fluorescent materials face inefficiencies in fluorescence usage due to degradation, leading to reduced light output and lower optical path alignment, which affects the entry of fluorescence into downstream optical components.
Innovation Solution
A light source device with a shiftably supported wavelength conversion unit, including a fluorescent material and a collection system, allows for the repositioning of the fluorescent material to maintain efficient fluorescence generation and optical path alignment, utilizing elastic members and a cooling mechanism to manage heat and prevent degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the collection position of excitation light is shifted to prevent fluorescent material degradation, then the fluorescent material life is extended, but the optical path of fluorescence changes and entry efficiency into downstream optical components deteriorates
Solution Approach 1:
The fluorescent material is made shiftably supported relative to the housing part, allowing dynamic repositioning. The shift mechanism enables the fluorescent material to be moved to different positions along the optical path, providing adaptability to balance between preventing degradation and maintaining optical efficiency.
Solution Approach 2:
The fluorescent material is divided into multiple fluorescent material layers placed side by side in shift directions. This segmentation allows different regions of the fluorescent material to be used at different times, extending overall life while maintaining consistent optical performance through strategic repositioning.
2Power
If the fluorescent material is cooled to improve fluorescence conversion efficiency, then light output is improved, but thermal management complexity increases
Solution Approach 1:
A cooling member is introduced as an intermediary component between the fluorescent material and the housing part. This dedicated cooling component simplifies thermal management by providing a direct heat dissipation path without requiring complex active cooling systems, achieving efficient cooling through passive thermal conduction.
3Illumination intensity
If the fluorescent material is exposed to high-energy excitation light for extended periods, then light output is maintained, but fluorescence degradation accelerates
Solution Approach 1:
The shift mechanism enables periodic repositioning of the fluorescent material, allowing different regions to be exposed to excitation light in alternating periods. This periodic action distributes the cumulative exposure evenly across the fluorescent material, extending overall lifespan while maintaining consistent light output.
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 solution extends the life of the fluorescent material, maintains high light use efficiency, and ensures reliable high-brightness image display by shifting the fluorescent material to avoid prolonged exposure to high-energy excitation light, thereby reducing fluorescence reduction and improving optical component efficiency.
Implementation Method 1
a wavelength conversion unit having a fluorescent material excited by a light output from the light source and generating fluorescence
Implementation Method 2
a cooling member fixed to the fluorescent material supporting substrate and releasing heat generated in the fluorescent material
Implementation Method 3
A first elastic member may be provided between the holding member and the fluorescent material supporting substrate
Data Source
AI summary
A light source device of the present disclosure includes a light source, a wavelength conversion unit having a fluorescent material excited by a light output from the light source and generating fluorescence and a fluorescent material supporting substrate supporting the fluorescent material, and a housing part with the light source fixed thereto supporting the wavelength conversion unit, wherein the wavelength conversion unit is shiftably supported relative to the housing part.