Sensor Placement for Fluorescent Unit Anomaly Detection
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Solution Overview
Problem
Conventional light source devices, such as projectors, have complex structures due to the inclusion of reflective optical systems for extracting wavelength-converted light, making it difficult to accurately detect anomalies in fluorescent units.
Innovation Solution
A light source device with a simple configuration that includes a plurality of excitation light sources, an optical member to condense primary light, a fluorescent unit that emits secondary light, and a sensor to detect anomalies, where the sensor is positioned inside an imaginary circle formed by connecting two excitation light sources, allowing for effective detection of anomalies in the fluorescent unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reflective optical system is added to extract wavelength-converted light, then the detection capability of the fluorescent unit is improved, but the device structure becomes complex
Solution Approach 1:
The patent extracts only the essential detection function by removing the reflective optical system. The sensor is directly positioned to detect light from the fluorescent unit without requiring complex reflection paths, thereby simplifying the structure while maintaining detection capability through proper sensor placement within the imaginary circle geometry
Solution Approach 2:
Instead of using a reflective system to redirect light to the sensor, the patent inverts the approach by directly positioning the sensor in the light path where it can naturally receive emitted light from the fluorescent unit. This inversion eliminates the need for reflective components while preserving detection functionality
2Measurement precision
If the sensor is positioned to circumscribe excitation light sources within an imaginary circle, then the detection accuracy is improved, but the design constraints increase
Solution Approach 1:
The patent applies local quality by defining a specific geometric region (imaginary circle) where the sensor must be positioned relative to the excitation light sources. This localized constraint ensures optimal detection by capturing light from all excitation sources while maintaining overall design flexibility in other aspects of the device
Solution Approach 2:
The patent transitions from considering only linear or planar arrangements to utilizing circular geometry in a two-dimensional plane. By positioning the sensor within an imaginary circle that circumscribes the excitation light sources, the design captures light from multiple sources simultaneously, improving detection accuracy while providing a clear geometric framework for flexible implementation
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 accurate detection of anomalies in the fluorescent unit with a simplified structure, ensuring reliable operation and flexibility in design by concentrating light that travels back towards the sensor, thereby enhancing detection accuracy.
Implementation Method 1
an optical member that condenses the primary light
Implementation Method 2
a fluorescent unit that emits secondary light including the primary light and wavelength converted light, the wavelength converted light being at least some of the primary light on which wavelength conversion is performed
Data Source
AI summary
A light source device includes a plurality of light sources; a condensing optical member; a fluorescent unit that converts at least a portion of the light from the light sources and condensed by the optical member into light including converted light and light from the light sources; and a sensor that detects an anomaly in the fluorescent unit, such sensor disposed within a circular area circumscribed by the light sources.