Light-Emitting Device Remote Phosphor Light Guide
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Solution Overview
Problem
Existing light-emitting devices with optical fibers face inefficiencies in light conversion and heat management, leading to reduced reliability and potential harmful emission of short-wave radiation due to the proximity of the radiation source and converter material.
Innovation Solution
A light-emitting device design where the converter material is separated from the radiation source by a light guide, allowing for remote phosphor configuration, which reduces reabsorption of converted light and separates the generation of visible light from heat sources, thereby increasing efficiency and reliability, and includes a detection system to prevent harmful radiation emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the converter material is arranged in the immediate vicinity of the radiation source, then the device structure is simple, but the light conversion efficiency is reduced due to reabsorption of converted light by the radiation source
Solution Approach 1:
The device is divided into separate functional modules: the radiation source is separated from the converter material by a light guide. This segmentation allows the radiation source to be positioned remotely, preventing reabsorption of converted light while maintaining structural organization through modular design.
Solution Approach 2:
A light guide is introduced as an intermediary component between the radiation source and the converter material. This mediator transports the radiation from the source to the converter material, enabling spatial separation while maintaining functional connection, thus preventing reabsorption losses.
2Volume of moving object
If the converter material is placed near the radiation source, then the device is compact, but the operating temperature of the converter material increases reducing its reliability
Solution Approach 1:
The device structure is segmented to separate the heat-generating radiation source from the converter material. The light guide acts as a thermal isolator, allowing compact overall design while maintaining thermal separation to protect the converter material from excessive temperatures.
Solution Approach 2:
The light guide serves as a thermal intermediary that conducts light while providing thermal isolation. It allows the converter material to be positioned away from the heat source, reducing operating temperature and improving reliability without significantly increasing device volume.
3Loss of energy
If the converter material is separated from the radiation source by a light guide, then light conversion efficiency increases, but the device complexity increases
Solution Approach 1:
The light guide performs multiple functions simultaneously: it transports radiation from the source to the converter material, provides thermal isolation to protect the converter material, and enables spatial separation to prevent reabsorption. This multi-functionality reduces the need for additional separate components, mitigating the increase in device complexity.
Solution Approach 2:
The functions of radiation transport, thermal management, and spatial separation are merged into a single light guide component. This consolidation achieves high light conversion efficiency while minimizing the increase in overall device complexity through functional integration.
4Volume of moving object
If the converter material is placed near the radiation source, then the device is compact, but harmful short-wave radiation may be emitted due to damage
Solution Approach 1:
The light guide acts as a protective intermediary between the radiation source and the environment. It contains and directs the short-wave radiation to the converter material, preventing harmful radiation leakage even if the converter material degrades or the device is compact.
Solution Approach 2:
The harmful short-wave radiation is extracted and confined within the light guide pathway, directed specifically to the converter material. This prevents the radiation from being emitted into the surrounding environment, enhancing safety while maintaining compact device design.
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
This design enhances light conversion efficiency, lowers the operating temperature of the converter material, increases its reliability, and ensures safe emission by detecting damage to the light guide and controlling the energy supply to prevent harmful radiation.
Implementation Method 1
a light guide into which the radiation emitted by the radiation source is coupled
Implementation Method 2
a converter material which converts the radiation transported through the light guide into light of a second, longer wavelength
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
An embodiment of the invention relates to a light-emitting device which comprises a radiation source (5) emitting radiation of a first wavelength, a fiber-optic waveguide (10) into which the radiation emitted by the radiation source is injected, and a converter material (15) which converts the radiation transported by the fiber-optic waveguide (10) to light (20) of a second, longer wavelength. A light-emitting device of said type may have an improved light conversion efficiency.