Wavelength-Converting Frame Structure for Compact Light Emitters
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Solution Overview
Problem
Existing light-emitting devices with a light-transmissive member between the semiconductor laser element and the wavelength conversion member result in increased device size.
Innovation Solution
A light-emitting device design featuring a frame member with integrated wavelength conversion material, where the frame member is formed by combining two parts with different surface areas to reduce the overall size, and a manufacturing method involving a base member, frame member, and cover member to create a compact package structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light-transmissive member is placed between the semiconductor laser element and the wavelength conversion member, then the light extraction and wavelength conversion efficiency is improved, but the device size increases
Solution Approach 1:
The patent combines the light-transmissive member and the wavelength conversion member into a single integrated wavelength conversion member. The wavelength conversion layer is formed directly on the light-transmissive member, eliminating the need for a separate wavelength conversion member. This integration maintains the light extraction and wavelength conversion efficiency while reducing the overall device size by removing the gap and interface between separate components.
Solution Approach 2:
The wavelength conversion layer is nested within the package structure, specifically formed on the inner lateral surface of the light-transmissive member. This nesting approach allows the wavelength conversion function to be embedded within the existing structural components, maximizing space utilization and minimizing the device footprint while preserving the optical conversion efficiency.
2Volume of moving object
If the frame member is designed with two parts of different surface areas, then the device compactness is improved, but the manufacturing complexity increases
Solution Approach 1:
The frame member is segmented into two distinct parts: a light-transmissive member with a first surface area and a wavelength conversion member with a second surface area. This segmentation allows each part to be optimized for its specific function and size requirements, enabling compact device design while simplifying the manufacturing process by allowing independent fabrication and assembly of the two parts.
Solution Approach 2:
Different surface areas are assigned to different parts of the frame member based on their functional requirements. The light-transmissive member has a larger first surface area to maximize light extraction, while the wavelength conversion member has a smaller second surface area optimized for the conversion process. This local quality differentiation achieves compactness without requiring complex overall结构设计.
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
The solution effectively reduces the size of the light-emitting device while maintaining efficient light emission and wavelength conversion, enabling smaller and more compact device designs.
Implementation Method 1
a wavelength conversion member disposed lateral to the semiconductor laser element and extracts light from a lateral surface thereof
Data Source
AI summary
A light-emitting device includes a base member, a frame member and a light-emitting element. The frame member is fixed to the base member and has one or more inner lateral surfaces and one or more outer lateral surfaces. The frame member includes a first part containing a wavelength conversion material and defining one part of the one or more inner lateral surfaces and one part of the one or more outer lateral surfaces, and a second part connected with the first part and defining another part of the one or more inner lateral surfaces and another part of the one or more outer lateral surfaces. The light emitting element has a light-emitting surface, and is configured to emit, from the light-emitting surface, light to be incident on the one part of the one or more inner lateral surfaces defined by the first part of the frame member.