Projector Light Source With Angled Support-Wall Reflection
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Solution Overview
Problem
Existing light source devices for projectors suffer from low excitation light use efficiency due to partial entry of excitation light into the heat conduction member rather than the phosphor, leading to insufficient fluorescence intensity.
Innovation Solution
A light source device design with a wavelength conversion member supported by a support member, where the support member's wall surfaces are tilted to reflect excitation light back into the phosphor, and the light emitting surface is opposed to a specific face of the wavelength conversion member, enhancing light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heat conduction member is disposed to cover the periphery of the phosphor, then heat dissipation is improved, but excitation light use efficiency deteriorates
Solution Approach 1:
The heat conduction member is segmented into a base portion and a wall portion that is disposed at a distance from the phosphor. This segmentation allows the wall portion to reflect excitation light back toward the phosphor while the base portion maintains thermal contact for heat dissipation, thus resolving the contradiction between heat dissipation and light efficiency.
Solution Approach 2:
The reflective coating on the heat conduction member acts as an intermediary that redirects excitation light that would otherwise be lost. The reflective surface intercepts stray light and redirects it toward the phosphor, converting what would be a harmful loss into a useful contribution to fluorescence generation.
2Stability of the object's composition
If the wall surface is positioned close to the wavelength conversion member for support, then structural stability is improved, but excitation light reflection efficiency deteriorates
Solution Approach 1:
The heat conduction member exhibits different spatial configurations: the base portion is close to the phosphor for thermal management, while the wall portion is positioned at an optimized distance to provide both structural support and effective light reflection. This local differentiation resolves the contradiction between structural stability and light reflection efficiency.
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
Improves excitation light use efficiency by redirecting light into the phosphor, ensuring adequate fluorescence intensity for projector applications.
Implementation Method 1
the second portion reflects at least a part of the first light
Implementation Method 2
a wavelength conversion member which includes a phosphor, and which is configured to convert the first light emitted from the light emitting element into second light having a second wavelength band different from the first wavelength band
Data Source
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AI summary
A light source device according to the present disclosure includes a light emitting element for emitting first light, a wavelength conversion member for converting the first light into second light, and a support member. The wavelength conversion member has a first face and a second face crossing a longitudinal direction of the wavelength conversion member, a third face and a fourth face crossing the first face and the second face, and a fifth face and a sixth face crossing the first face and the second face and crossing the third face and the fourth face, and the second light is emitted from the first face. A light emitting surface of the light emitting element is opposed to the third face. The support member has a support surface opposed to the fourth face, and a first wall surface which is opposed to the fifth face, and which is separated from the fifth face. The first wall surface has a first portion located at the wavelength conversion member side, and a second portion located at the support surface side, wherein the first portion extends in a direction perpendicular to the support surface, the second portion is tilted so as to get away from the fifth face as proceeding toward the first portion from the support surface, and the second portion reflects at least a part of the first light.