Wavelength Conversion Wheel Symmetry for Projection Light Source
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Solution Overview
Problem
Current projection apparatuses using solid state light sources face issues with low light conversion efficiency due to high density and poor heat dissipation of wavelength conversion materials, leading to poor brightness and bulky apparatuses.
Innovation Solution
A light source module comprising a first and second solid-state light source and a wavelength conversion wheel with a substrate having symmetrically disposed wavelength conversion and penetration regions, allowing for improved light conversion efficiency and reduced occupation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the power of the laser diode is increased to increase brightness, then the brightness of the projection apparatus is improved, but the heat dissipation of the projection apparatus becomes poor
Solution Approach 1:
The wavelength conversion wheel is divided into multiple regions including first and second conversion regions and first and second penetration regions. This segmentation allows different portions of the wheel to perform different functions (conversion vs. heat dissipation), enabling the system to handle higher power without excessive heat accumulation in any single region.
Solution Approach 2:
Different regions of the wavelength conversion wheel are assigned different properties: conversion regions contain fluorescent powder for wavelength conversion, while penetration regions have lower density to facilitate heat dissipation. This local differentiation allows the wheel to simultaneously perform conversion and thermal management functions.
2Illumination intensity
If multiple groups of wavelength conversion materials are simultaneously used to increase brightness, then the brightness of the projection apparatus is improved, but the volume of the projection apparatus becomes too bulky
Solution Approach 1:
Multiple wavelength conversion materials are merged into a single wavelength conversion wheel structure. The wheel integrates first and second conversion regions with different fluorescent powders, allowing multiple conversion functions to be performed within one compact component rather than requiring separate materials or modules.
Solution Approach 2:
The wavelength conversion wheel serves multiple functions simultaneously: it performs wavelength conversion in its conversion regions, allows light transmission in its penetration regions, and provides heat dissipation pathways. This multi-functionality eliminates the need for additional separate components.
3Productivity
If the density of wavelength conversion material is increased to improve conversion efficiency, then the conversion efficiency of the fluorescent powder is improved, but the heat dissipation becomes poor
Solution Approach 1:
The wavelength conversion wheel features local quality variation with high-density conversion regions for efficient wavelength conversion and low-density penetration regions for effective heat dissipation. This spatial differentiation of material properties allows the system to simultaneously achieve high conversion efficiency and adequate thermal management.
Solution Approach 2:
The penetration regions of the wavelength conversion wheel are designed with lower density, creating a porous-like structure that facilitates heat dissipation. This porous characteristic allows thermal energy to escape more effectively from regions where light conversion occurs.
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 solution enhances light conversion efficiency and reduces the physical space required for the light source module in projection apparatuses, addressing the limitations of existing technologies.
Implementation Method 1
The wavelength conversion region is configured to convert the light beams to generate a conversion beam
Implementation Method 2
The penetration region is configured to allow the first light beam and the second light beam to pass through
Data Source
AI summary
A light source module includes a solid-state light source and a wavelength conversion wheel. The solid-state light source provides a light beam. The wavelength conversion wheel has a wavelength conversion region and a penetration region. The wavelength conversion region converts the light beam to generate a conversion beam. A substrate of the wavelength conversion wheel includes a first surface and a second surface opposite to the first surface. The wavelength conversion region includes a first conversion region and a second conversion region. The first and the second conversion regions are respectively located on the first and the second surfaces. The penetration region is connected to the first and the second surfaces. The wavelength conversion region and the penetration region are symmetrically disposed by using a symmetry point of the substrate as a reference point. A projection apparatus including the light source module is disclosed.