Light Source Device With Ratio-Based Conversion Member Detection
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Solution Overview
Problem
Traditional light source devices struggle to precisely detect small breakages in light conversion members due to inefficiencies in light convergence, affecting the accuracy of sensor detection.
Innovation Solution
A light source device comprising excitation light sources, a light conversion member, sensors, and a controller that determines an operation safety parameter based on the ratio of primary light to wavelength-converted light signals to control the excitation light sources, allowing for precise detection of light conversion member anomalies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light is reflected by a beam splitter and directed to a sensor in traditional light source devices, then light convergence efficiency of the sensor is ensured, but precision of detection for small breakage cannot be achieved
Solution Approach 1:
The patent segments the light detection function into two independent sensors: a first sensor for detecting primary light and a second sensor for detecting wavelength-converted light. This segmentation allows each sensor to be optimized for its specific detection task, enabling precise detection of small breakages in the light conversion member without relying on a single sensor with compromised light convergence efficiency.
Solution Approach 2:
The patent introduces a beam splitter as an intermediary optical element that directs different wavelengths of light to different sensors. The beam splitter mediates between the light source and the sensors, separating the primary light path from the wavelength-converted light path, thereby enabling simultaneous optimization of both detection precision and light convergence efficiency.
2Device complexity
If a single sensor detects both primary light and wavelength-converted light, then device complexity is reduced, but measurement precision for breakage detection deteriorates
Solution Approach 1:
The patent divides the detection system into two separate sensors with specialized functions. The first sensor is dedicated to detecting primary light, while the second sensor is dedicated to detecting wavelength-converted light. This segmentation improves measurement precision by allowing each sensor to be optimized for its specific wavelength range, despite increasing device complexity.
Solution Approach 2:
The patent applies local quality by optimizing each sensor for specific detection requirements. The first sensor is optimized for primary light detection while the second sensor is optimized for wavelength-converted light detection. This localized optimization ensures that each sensor operates at peak performance for its designated function, thereby improving overall breakage detection precision.
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 device can accurately detect small breakages in the light conversion member, ensuring operational safety by controlling the excitation light sources based on predetermined thresholds or changes in the operation safety parameter, thereby preventing potential failures.
Implementation Method 1
a light conversion member that emits secondary light that contains the primary light and wavelength-converted light obtained by converting a wavelength of at least part of the primary light
Implementation Method 2
a sensor that detects the primary light and the wavelength-converted light
Data Source
AI summary
The light source device includes at least one excitation light source which emits primary light, a light conversion member which emits secondary light that contains the primary light and wavelength-converted light obtained by converting a wavelength of at least part of the primary light, a sensor which detects the primary light and the wavelength-converted light, and a controller which obtains a first signal which is a signal indicating the detected primary light and a second signal indicating the wavelength-converted light detected by the sensor. The controller determines an operation safety parameter based on a ratio of an output value of the first signal to an output value of the second signal, and controls the at least one excitation light source based on the operation safety parameter with respect to a predetermined threshold or an amount of change of the operation safety parameter from that during normal operation.