Lighting Module With Dual-Direction LED Input for Phosphor Conversion
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Solution Overview
Problem
Traditional lighting modules for optical fiber applications, such as endoscopy and medical headlamps, require high lumen output and brightness but are limited by the high input power, short lifetime, and adverse thermal effects of Xenon short-arc discharge lamps, necessitating more energy-efficient alternatives.
Innovation Solution
A lighting module comprising two light sources and a phosphor element, where the first light source and second light source emit exciting lights that are converted by the phosphor element to produce emission light, with the lights inputting in different directions to enhance luminous flux and brightness, using LEDs and LDs to reduce power consumption and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If Xenon short-arc discharge lamps are used to provide high lumen output and brightness, then illumination intensity is improved, but power consumption increases and lifetime decreases
Solution Approach 1:
The patent divides the light source system into multiple LED chips (first light source and second light source) that can be independently controlled and positioned at different locations relative to the phosphor element. This segmentation allows the system to achieve high luminous flux through combined output while consuming less power than a single Xenon lamp, as each LED operates at lower individual power levels.
Solution Approach 2:
The patent changes the fundamental operating parameters by replacing the high-power Xenon discharge lamp with LED light sources that have different operational characteristics. The LEDs operate at lower power levels with longer lifetimes, and their output is enhanced through the phosphor conversion process, achieving the desired illumination intensity with reduced power consumption.
2Illumination intensity
If Xenon short-arc discharge lamps are used to provide high lumen output and brightness, then illumination intensity is improved, but operating lifetime is reduced
Solution Approach 1:
The patent employs multiple LED light sources that can be independently positioned and controlled. This segmentation allows for better thermal management and reduced stress on individual components, contributing to extended operational lifetime while maintaining high luminous flux output through the combined effect of multiple sources.
Solution Approach 2:
The patent transitions from Xenon lamps with short operational lifetimes to LED light sources with significantly longer operational lifetimes. This parameter change in the fundamental light source technology enables the system to maintain high illumination intensity over extended periods without the rapid degradation characteristic of Xenon lamps.
3Illumination intensity
If Xenon short-arc discharge lamps are used to provide high lumen output and brightness, then illumination intensity is improved, but thermal impact on illuminated targets increases
Solution Approach 1:
The patent uses multiple small LED light sources positioned at different locations relative to the phosphor element, allowing for distributed thermal management. This segmentation prevents concentrated heat buildup at any single point, reducing the thermal impact on illuminated targets while maintaining high luminous flux output.
Solution Approach 2:
The patent replaces the high-temperature Xenon discharge lamp with LED light sources that operate at lower temperatures. The phosphor conversion process occurs at these lower temperatures, significantly reducing the thermal impact on illuminated targets compared to the high-temperature operation of Xenon lamps.
4Illumination intensity
If two light sources are used to input light in different directions to enhance luminous flux, then illumination intensity is improved, but device complexity increases
Solution Approach 1:
The patent divides the lighting system into multiple independent LED light sources that can be positioned at different locations and orientations relative to the phosphor element. This segmentation allows each light source to contribute to the overall luminous flux from different directions, enhancing total output while maintaining relatively simple individual source designs.
Solution Approach 2:
The patent utilizes different spatial dimensions and directions for light input to the phosphor element by positioning multiple light sources at different locations. This dimensional approach allows light to be incident on the phosphor from multiple angles, enhancing luminous flux through additive effect while keeping each individual light source simple in 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
The solution provides higher luminous flux and brighter illumination while extending the lifetime of the lighting module and reducing heat, improving lighting efficiency and performance compared to traditional Xenon lamps.
Implementation Method 1
The phosphor element converts the first exciting light and the second exciting light to an emission light
Data Source
AI summary
A lighting module comprises a first light source, a second light source and a phosphor element is provided. The first light source emits a first exciting light. The second light source emits a second exciting light. The phosphor element converts the first exciting light and the second exciting light to an emission light. The first exciting light and the second exciting light are input to the phosphor element in different directions of incidence.