Projector Light Guide Support Layout to Reduce Light Leakage
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Solution Overview
Problem
In existing light source devices for projectors using phosphors, the use of metal wires for electrical coupling between a circuit board and light emitting elements leads to light leakage through gaps between the holder and circuit board, reducing light efficiency.
Innovation Solution
A light source device design with a light guide member and support member configuration that includes first and second light emitting elements, metal wires for electrical coupling, and a support structure that minimizes light leakage by optimizing the arrangement of light emitting elements and guiding light efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If metal lines are used to electrically couple the circuit board and light emitting elements, then electrical connection is achieved, but light leakage occurs through gaps between the holder and circuit board reducing light use efficiency
Solution Approach 1:
The patent merges the holder and circuit board into a single integrated structure where the circuit board serves as both the electrical connection substrate and the light-guiding structure. The light-guiding portion is formed integrally with the circuit board, eliminating the need for a separate holder and reducing gaps that cause light leakage.
Solution Approach 2:
The patent introduces a light-guiding portion as an intermediary structure that bridges the light emitting elements and the light guide member. This portion is formed by the circuit board itself, acting as a mediator to guide light while maintaining electrical connections, thereby reducing light leakage through optimized light paths.
2Ease of manufacture
If the holder and circuit board are arranged in a separate state to accommodate metal lines, then electrical coupling is achieved, but light leakage increases through gaps
Solution Approach 1:
The circuit board is designed to integrate multiple functions: electrical connection substrate, light-guiding structure, and structural support. By merging these functions into a single component, the patent eliminates the need for separate holder arrangements while maintaining ease of electrical coupling through conventional PCB techniques.
Solution Approach 2:
The circuit board is designed as a multi-functional component that simultaneously provides electrical connections, structural support, and light guidance. This universal design allows the same component to fulfill multiple roles, reducing the number of separate parts and minimizing gaps that cause light leakage.
3Reliability
If light emitting elements are arranged on a circuit board with metal lines, then electrical connection is established, but light use efficiency decreases due to light leakage
Solution Approach 1:
The patent combines the electrical connection function and light guidance function into the same circuit board structure. The light-guiding portion is formed integrally with the circuit board, ensuring that electrical connections remain reliable while light paths are optimized to reduce leakage and improve 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
Enhances light use efficiency by reducing light leakage and improving the arrangement of light emitting elements, ensuring effective light guidance and utilization.
Implementation Method 1
a light guide member which has an elongated shape along the first axis and on which the light emitted from the first light emitting element and the second light emitting element is incident
Implementation Method 2
a phosphor rod that converts excitation light emitted from each of the light emitting elements of the excitation light source into fluorescence
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A light source device according to the present disclosure includes a light source unit including first and second light emitting elements, a substrate, and first and second metal wires, a light guide member on which light from the light source unit is incident, and a support member including a support groove. The light guide member has a first surface that emits light, a second surface opposite to the first surface, third and fourth surfaces facing opposite to each other, and fifth and sixth surfaces facing opposite to each other. In the light source unit, each light emitting element faces the third surface, the support groove includes a support surface facing the fourth surface and supporting the light guide member, and a first wall surface at a distance from the fifth surface, defining a first axis, a second axis perpendicular to the first axis, and a third axis perpendicular to the first and second axes, in a plan view along the third axis, each light emitting element has a rectangular outer shape, outer circumferential sides of the light emitting elements cross the first and second axes, first and second wiring terminals are located between the fifth surface and a first wall surface, and the first wall surface extends toward the light source unit beyond the third surface of the light guide member.