Sensing System Mercury Wavelength Filtering
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Solution Overview
Problem
Existing sensing systems, such as those in mobile phones, struggle to distinguish between light emitted by different sources like fluorescent lights, incandescent lights, and LEDs due to similar visible and infrared spectral responses.
Innovation Solution
A sensing system utilizing a light filtering apparatus that passes specific wavelengths corresponding to Mercury's emission spectrum characteristics, allowing the processor to differentiate between fluorescent light sources and LEDs by analyzing sensor responses to these wavelengths, and further distinguishing between various light sources using multiple emission spectrum characteristics and color weighting similar to the human eye.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a simple light filter and sensor are used to detect light, then the device complexity is low, but the measurement precision is insufficient to distinguish between different light sources
Solution Approach 1:
The sensing system divides the detection task into multiple wavelength channels, each targeting specific emission spectrum characteristics of different light sources. By segmenting the spectral detection into discrete wavelength bands (including Mercury characteristics at 546.1nm and 578.2nm), the system achieves precise light source identification without requiring complex full-spectral analysis
Solution Approach 2:
The patent introduces a light filter as an intermediary component between the light source and sensor. This filter is specifically designed to transmit certain wavelength ranges while blocking others, enabling the sensor to indirectly detect light source characteristics through filtered intensity measurements at key wavelengths
2Reliability
If multiple wavelengths corresponding to Mercury emission spectrum are detected, then the reliability of light source identification is improved, but the device complexity increases
Solution Approach 1:
The light filtering apparatus is designed with multi-functionality, where a single filtering structure simultaneously enables detection across multiple Mercury emission wavelengths (546.1nm, 578.2nm, and other characteristic lines). This universal design allows one component to perform multiple detection functions, improving reliability without proportionally increasing device complexity
Solution Approach 2:
The system exploits the specific spectral parameters (wavelengths) of Mercury emission as identification markers. By tuning the detection system to these fixed parameter values characteristic of Mercury-containing fluorescent lights, the patent achieves reliable discrimination between fluorescent and LED sources through parameter-based recognition rather than complex pattern analysis
3Measurement precision
If the sensing system uses emission spectrum characteristics to distinguish light sources, then the measurement precision is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
Instead of measuring the complete emission spectrum, the system performs partial measurement by detecting only the intensities at specific critical wavelengths (Mercury characteristics and complementary wavelengths). This partial action approach achieves sufficient measurement precision for light source identification while dramatically reducing the difficulty of spectral analysis compared to full-spectrum measurement
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 significantly improves the accuracy of color sensing and display by accurately identifying ambient light sources, enabling better color detection and auto white balancing in devices like mobile phones and interactive displays.
Implementation Method 1
a light filtering apparatus configured to pass a first wavelength of light corresponding to an emission spectrum characteristic of Mercury
Implementation Method 2
a sensor configured to receive light passed by the light filtering apparatus and produce a sensor response that is indicative of the light passed by the light filtering apparatus
Data Source
AI summary
A sensing system comprising a light filtering apparatus configured to pass a first wavelength of light corresponding to an emission spectrum characteristic of Mercury. The sensing system comprises a sensor configured to receive light passed by the light filtering apparatus and produce a sensor response that is indicative of the light passed by the light filtering apparatus. The sensing system comprises a processor configured to use the sensor response to distinguish between light emitted by a fluorescent light source and light emitted by a light emitting diode.