Light Source Device for Projectors with Phosphor Positioning
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Solution Overview
Problem
Existing light source devices for projectors have low light use efficiency due to phosphors being arranged close to one wall surface of the groove part, leading to reduced incident efficiency of excitation light and suboptimal fluorescence intensity.
Innovation Solution
A light source device with a light guide member having specific opposing faces and protruding parts, supported by a groove part with separated wall surfaces, allowing for improved light entry and heat dissipation, and held by a holding member to maintain precise positioning and increase light use efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the phosphor is arranged close to one of the wall surfaces of the groove part, then the heat dissipation is improved, but the light use efficiency becomes low
Solution Approach 1:
The invention introduces a vertical dimension to the positioning problem by using a support protrusion that extends upward from the groove bottom surface. This vertical support element allows the phosphor to be positioned at a height that provides both adequate light incident angles and effective heat dissipation, resolving the contradiction between these two requirements that existed in the planar arrangement of prior art.
Solution Approach 2:
The support member acts as an intermediary element between the groove part and the phosphor. It provides a dedicated support protrusion that mediates the positioning relationship, allowing the phosphor to be held at an optimal height above the groove bottom surface rather than being directly contacted by the groove walls, thus simultaneously achieving good light efficiency and heat dissipation.
2Use of energy by moving object
If gaps are disposed between both side surfaces of the phosphor and the wall surfaces of the groove part, then the light use efficiency is increased, but the positional accuracy decreases
Solution Approach 1:
The support member serves as an intermediary positioning element that bridges the gap between the groove part and the phosphor. It provides mechanical support while maintaining controlled gaps on the side surfaces, thus achieving both good light incident angles and adequate positional accuracy without requiring direct contact between the phosphor and groove walls.
Solution Approach 2:
The support member is segmented into distinct functional portions: a support protrusion for vertical positioning, side surface gaps for light efficiency, and a holding member for securing the phosphor. This segmentation allows each portion to independently optimize its function without compromising the others, resolving the contradiction between light efficiency and positional accuracy.
3Illumination intensity
If the light emitting element emits excitation light, then the fluorescence intensity is increased, but the heat generated in the phosphor increases
Solution Approach 1:
The invention positions the phosphor in a three-dimensional configuration above the groove bottom surface using the support protrusion. This vertical positioning creates improved heat dissipation pathways while maintaining optimal light incident angles, allowing high fluorescence intensity generation without excessive heat accumulation that would occur in planar arrangements.
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
Enhances light use efficiency by ensuring excitation light enters the phosphor from multiple sides, achieving desired fluorescence intensity and maintaining wavelength conversion efficiency while preventing heat transfer issues.
Implementation Method 1
a light guide member which light emitted from the light emitting element enters
Implementation Method 2
there is proposed a light source device using fluorescence emitted from a phosphor when irradiating the phosphor with excitation light emitted from a light emitting element
Data Source
AI summary
A light source device according to the present disclosure is provided with a light emitting element, a light guide member, a support member for supporting the light guide member in a groove part, and a holding member for holding the light guide member outside the groove part. The first face of the light guide member emits light guided by the light guide member, the light emitting element is disposed so as to be opposed to the third face, and the groove part has a support surface, a first wall surface, and a second wall surface. The light guide member has a protruding part which protrudes outside the groove part in at least one of both end portions on the first axis, and the protruding part is held by the holding member.