Projector Light Source Layout for Cooling a Wavelength Converter
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Solution Overview
Problem
The existing light source devices face issues with elevated temperature of the wavelength converter due to a long radiation path from the wavelength converter to the radiator member, leading to reduced luminous efficiency.
Innovation Solution
A light source device design that includes a first laser emitter, a light transmissive member, a base with support parts for the laser emitter and transmissive member, and a wavelength converter arranged on the transmissive member's surface, with an air layer and uneven structure to enhance heat dissipation and improve luminance of fluorescence conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the wavelength converter is positioned away from the radiator member to allow light transmission, then the light path is established, but the temperature of the wavelength converter rises due to long radiation path
Solution Approach 1:
The light transmissive member serves as an intermediary between the wavelength converter and the external environment, allowing light to pass through while the base acts as a thermal intermediary to conduct heat away from the wavelength converter. This separation of optical and thermal functions resolves the contradiction between maintaining light output and controlling temperature.
Solution Approach 2:
The system is segmented into distinct functional components: the wavelength converter for light conversion, the light transmissive member for optical transmission, and the base with radiator member for thermal management. This segmentation allows each component to optimize its specific function without compromising the others, particularly separating the light path from the heat dissipation path.
2Temperature
If the wavelength converter is positioned on the obverse surface with support at the incident area, then heat transfer is enhanced, but the structural complexity increases
Solution Approach 1:
The base serves multiple functions: it supports the wavelength converter structurally, conducts heat away thermally, and positions the light transmissive member. By making the base a multi-functional component, the patent avoids adding separate support structures, thereby enhancing cooling performance without significantly increasing device complexity.
Solution Approach 2:
The support function and heat dissipation function are merged into a single integrated base structure. The base simultaneously provides mechanical support for the wavelength converter and serves as a thermal conduction path to the radiator member, eliminating the need for separate support components and simplifying the overall structure.
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 efficiently dissipates heat from the wavelength converter, enhancing fluorescence conversion efficiency and luminance of the illumination light, thereby improving the performance of the light source device.
Implementation Method 1
a wavelength converter arranged on a first surface of the light transmissive member and configured to convert the first light into second light in a second wavelength band different from the first wavelength band
Implementation Method 2
an uneven structure on the incident surface to scatter excitation light
Implementation Method 3
The heat of the wavelength converter is released to the radiator member via a light transmissive member
Data Source
AI summary
A light source device includes a first laser emitter configured to emit first light, a light transmissive member having a first surface and a second surface, the first light emitted from the first laser emitter being incident on the second surface, a base having a first support part configured to support the first laser emitter and a second support part configured to support the light transmissive member, and a wavelength converter arranged on the first surface and configured to convert the first light into second light. The wavelength converter has an incident surface including an incident area where the first light enters and an emission surface disposed at an opposite side to the incident surface and configured to emit the second light. The second support part supports the second surface of the light transmissive member in an area corresponding to the incident area.