Projector Light Source Layout for Closer Phosphor Rod Coupling
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Solution Overview
Problem
Existing light source devices for projectors face challenges in efficiently utilizing excitation light due to the need to position the light-emitting element away from the phosphor rod, leading to reduced utilization efficiency of excitation light.
Innovation Solution
A light source device design that includes a light-emitting element connected via a metal wire to a substrate, supported by a support member with a groove accommodating a light guide member, and an insulating section on the support member, allowing for closer proximity of the light-emitting element to the phosphor rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light-emitting element is positioned away from the phosphor rod by at least the thickness of the sealing resin, then electrical connection and insulation are ensured, but the utilization efficiency of excitation light is lowered
Solution Approach 1:
The patent introduces an insulating member as an intermediary component between the light-emitting element and the phosphor rod. This insulating member provides electrical insulation while allowing the light-emitting element to be positioned closer to the phosphor rod, thereby reducing light loss without compromising electrical connection reliability. The insulating member acts as a mediator that resolves the contradiction between electrical insulation requirements and optical efficiency requirements.
2Loss of energy
If the light-emitting element is disposed close to the phosphor rod, then excitation light utilization efficiency is improved, but electrical insulation becomes difficult to maintain
Solution Approach 1:
The insulating member serves as a mediator that enables close positioning of the light-emitting element to the phosphor rod while maintaining electrical insulation. This intermediary component allows the system to achieve both high light utilization efficiency and reliable electrical insulation simultaneously.
Solution Approach 2:
The insulating member is strategically positioned at specific locations where electrical insulation is critical, allowing close proximity between the light-emitting element and phosphor rod in other areas. This localized application of insulation maintains electrical reliability where needed while permitting optical efficiency improvements elsewhere.
3Reliability
If a sealing resin is used to insulate wires and light-emitting elements, then electrical insulation is achieved, but the distance between light-emitting element and phosphor rod increases
Solution Approach 1:
The insulating member is introduced as a dedicated intermediary that provides electrical insulation without requiring the light-emitting element to be positioned far from the phosphor rod. This mediator allows for minimal spacing while maintaining insulation, thereby reducing the distance parameter while preserving electrical reliability.
Solution Approach 2:
The patent extracts the insulation function from the sealing resin that previously required significant thickness, and implements it through a dedicated insulating member that provides the necessary insulation with minimal space occupation. This extraction allows the light-emitting element to be positioned closer to the phosphor rod.
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 the utilization efficiency of excitation light by minimizing light loss and improving the proximity of the light-emitting element to the phosphor rod, thereby optimizing light conversion and emission.
Implementation Method 1
a light guide member into which the light emitted from the light-emitting element enters and from which the light is emitted
Implementation Method 2
utilizes phosphorescence emitted by the phosphor rod by causing excitation light emitted by the light-emitting element to be incident on the phosphor rod
Data Source
AI summary
A light source device according to the present disclosure includes a light source section including a light-emitting element that emits light from a light-emitting surface, a substrate that supports the light-emitting element, and, at a light-emitting surface side of the light-emitting element, a metal wire that electrically connects the light-emitting element and the substrate, a light guide member into which the light emitted from the light-emitting element enters and from which the light is emitted; and a support member that supports the light guide member and that has conductivity, wherein the support member includes a support groove for accommodating the light guide member, the support groove includes a support surface that supports the light guide member and a side wall surface of a side wall section that intersects with the support surface and that faces a side surface of the light guide member, the light source section faces a top surface of the side wall section, and an insulating section is provided on at least one of the top surface and the side wall surface.