Medical Light Source Chromaticity Control via Optical Mixing
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Solution Overview
Problem
Existing medical light source systems using semiconductor light-emitting devices face challenges in maintaining constant chromaticity during light amount fluctuations, requiring complex feedback systems or cooling methods that are inefficient and costly.
Innovation Solution
A medical light source system comprising multiple semiconductor light-emitting devices with different wavelengths, where a control unit adjusts the mixing rate of their emissions to maintain constant chromaticity based on set light amount values, eliminating the need for feedback systems and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If cooling methods are used to maintain constant chromaticity during light amount fluctuations, then chromaticity stability is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the cooling device from the system by using multiple semiconductor light-emitting devices with different wavelengths. By controlling the mixing ratio of these devices, the system achieves chromaticity stability without requiring external cooling mechanisms, thus removing the source of complexity and cost associated with cooling systems.
Solution Approach 2:
The patent changes the operational parameters by using multiple light-emitting devices with different wavelengths (e.g., blue, cyan, green, yellow-green, red) and dynamically adjusting their mixing ratios. This parameter-based control approach replaces thermal management methods, achieving chromaticity stability through optical mixing rather than thermal control.
2Stability of the object's composition
If feedback systems are implemented to maintain constant chromaticity, then chromaticity stability is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple semiconductor light-emitting devices with specific wavelengths and pre-determining their mixing ratios to achieve desired chromaticity values. This proactive approach eliminates the need for feedback systems, as the chromaticity is controlled in advance through the mixing ratio settings rather than through continuous monitoring and adjustment.
3Stability of the object's composition
If cooling devices are added to maintain constant temperature, then chromaticity stability is improved, but mounting area and parts cost increase
Solution Approach 1:
The patent merges the chromaticity control function into the light generation process itself by using multiple light-emitting devices with different wavelengths. Instead of adding a separate cooling device, the system combines multiple light sources and controls their mixing ratios to achieve chromaticity stability, thereby eliminating the need for additional mounting area.
4Stability of the object's composition
If cooling power is increased to maintain constant temperature, then chromaticity stability is improved, but energy consumption increases
Solution Approach 1:
The patent replaces the mechanical/thermal system (cooling devices) with an optical system (multiple light-emitting devices with different wavelengths). By substituting thermal management with optical mixing and ratio control, the system achieves chromaticity stability without the energy consumption associated with cooling mechanisms.
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 approach effectively stabilizes chromaticity during light amount fluctuations without the need for feedback systems, ensuring consistent illumination quality in medical applications.
Implementation Method 1
a light source unit including two or more semiconductor light-emitting devices having wavelengths of emitted light different from each other
Implementation Method 2
generate light of predetermined chromaticity by mixing the light emitted from each of the semiconductor light-emitting devices
Data Source
AI summary
Provided is a medical light source device that includes a light source part including two or more semiconductor light-emitting devices having wavelengths of emitted light different from each other. The light source part generates light of predetermined chromaticity by mixing the light emitted from each of the semiconductor light-emitting devices and emits outward the generated light of the chromaticity as illumination light. The medical light source device further includes a control unit that controls a mixing rate of the light emitted from each of the semiconductor light-emitting devices based on a light amount setting value of the illumination light emitted from the light source part, and keeps the chromaticity constant regardless of a light amount of the illumination light.