Ceramic Conversion Material LED Light Delivery Device
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Solution Overview
Problem
Existing endoscopy devices lack the ability to change color temperature of light delivery without deteriorating light flux or density, which limits diagnostic capabilities as different tissues appear differently under varying light conditions.
Innovation Solution
A light delivery device incorporating LEDs that emit light in specific wavelength ranges and a ceramic conversion material to adjust color temperature while maintaining or improving light flux, using a combination of LEDs and a conversion element with controlled refractive indices and surface structures to enhance light emission and collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If halogen lamps are used to decrease color temperature by diminishing light flux, then color temperature changes, but light flux deteriorates
Solution Approach 1:
The patent changes the spectral parameters of the light source by using multiple LEDs with different wavelength characteristics (violet, blue, cyan, green, yellow-green, yellow, orange, red LEDs) instead of a single halogen lamp. By independently controlling the intensity of each LED wavelength component, the system can adjust color temperature while maintaining constant total light flux output.
Solution Approach 2:
The patent employs a composite light source system combining multiple LED types with different emission spectra, along with phosphor conversion elements. This composite approach allows independent manipulation of spectral distribution and total luminous flux, resolving the contradiction between color temperature adjustment and light flux maintenance.
2Illumination intensity
If Xenon lamps or halogen lamps are used for high flux density, then light flux is sufficient, but color temperature cannot be changed without flux deterioration
Solution Approach 1:
The patent implements dynamic control of the multi-LED system where the intensity of each wavelength component can be independently adjusted in real-time. This dynamic capability allows the system to adapt color temperature to different diagnostic requirements while maintaining optimal light flux density through electronic control rather than mechanical dimming.
Solution Approach 2:
The patent creates a universal light delivery device that can perform multiple functions: high-flux diagnostic illumination, color temperature adjustment for different tissue visualization, and spectral tuning. The multi-LED array with independent control channels provides versatility while maintaining high flux density capability.
3Illumination intensity
If light flux is increased in halogen lamps, then brightness improves, but color temperature shifts towards red
Solution Approach 1:
The patent independently controls the intensity parameters of each LED wavelength component. When total brightness needs to be increased, the system can amplify all wavelength components proportionally or selectively enhance specific wavelengths, thereby increasing overall luminance while maintaining the desired color temperature balance through electronic regulation rather than thermal effects.
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
Enables a high light flux density and luminance with the ability to shift color temperature without reducing light flux, improving tissue differentiation in medical diagnostics and treatments.
Implementation Method 1
at least one conversion element placed towards the at least one first LED, which converts at least partly the light from the at least one first LED to light in the wavelength range of ≥300 nm to ≤1000 nm, where the at least one conversion element comprises a ceramic conversion material
Implementation Method 2
at least one light emitting device comprising at least one first LED which emits light in the wavelength range of ≥220 nm to ≤550 nm
Data Source
AI summary
A method of delivering light from a lighting device including having at least one main LED, at least one auxiliary LED, and at least one ceramic light conversion element placed longitudinal to the path of light emitted from the main LED and orthogonal to the auxiliary LED; the method including the steps of switching on the at least one main LED, and changing the color temperature of the light emitted from the lighting device by switching on the at least one auxiliary LED.