Projector Light Source with Reflective Phosphor Support Walls
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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 heat conduction members rather than phosphors, leading to insufficient fluorescence intensity.
Innovation Solution
A light source device with a wavelength conversion member having specific opposing faces and a support member with tilted wall surfaces to reflect excitation light back into the phosphor, enhancing light utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a 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 first wall surface and a second wall surface with different functions: the first wall surface has a light-reflecting function to redirect excitation light to the phosphor, while the second wall surface has a heat conduction function to dissipate heat from the phosphor. This segmentation allows simultaneous achievement of heat dissipation and light efficiency improvement.
Solution Approach 2:
The heat conduction member is designed to perform multiple functions simultaneously: it serves as both a heat conduction path and a light-reflecting surface. By making the first wall surface tilted at a specific angle, it reflects excitation light back to the phosphor while the same structure continues to conduct heat away, achieving multi-functionality.
2Temperature
If the heat conduction member covers the periphery of the phosphor, then thermal management is improved, but fluorescence intensity deteriorates
Solution Approach 1:
The heat conduction member is divided into functional zones: the first wall surface oriented toward the light source provides light reflection to enhance fluorescence excitation, while the second wall surface provides heat conduction. This segmentation ensures that thermal management does not compromise fluorescence intensity.
Solution Approach 2:
The tilted first wall surface converts the potentially harmful effect of heat conduction member blocking light into a beneficial effect by reflecting excitation light back to the phosphor. The structure that was originally causing light loss is transformed into a light-guiding element that enhances fluorescence intensity.
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 fluorescence intensity by ensuring efficient use of excitation light, thereby enhancing projector performance.
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
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.