Spectrophotometer-Based Localization Module for Eyewear
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Solution Overview
Problem
Existing solutions for determining whether eyewear is indoors or outdoors are not accurate in all situations and locations, particularly due to dependence on ultraviolet rays which may not be present in all environments and conditions.
Innovation Solution
A calculation module that uses data from a spectrophotometer to determine the power density of at least two spectral components of light, allowing for accurate differentiation between indoor and outdoor locations by analyzing the ratio of cold to warm colors in the light spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an Ambient Light Sensor and UltraViolet sensor are used to differentiate indoor and outdoor conditions, then the solution works when sufficient ultraviolet rays are present, but it fails when ultraviolet rays are not present (indoor, nighttime, cloudy weather)
Solution Approach 1:
The patent changes the detection parameter from ultraviolet-specific sensing to full-spectrum optical sensing. The spectrophotometer measures optical properties across multiple wavelengths (380-780nm visible spectrum plus UV), allowing differentiation of indoor/outdoor conditions based on spectral composition rather than relying solely on UV presence. This enables reliable detection regardless of seasonality, weather, or time of day.
Solution Approach 2:
The spectrophotometer serves multiple functions: it detects outdoor/indoor conditions, identifies artificial lighting patterns (office, home, street lights), and provides spectral analysis for various environmental conditions. This single device replaces the need for separate UV sensors and ambient light sensors, achieving universal applicability across all lighting conditions.
2Measurement precision
If a spectrophotometer is integrated into eyewear to detect localization and lighting patterns, then accurate detection is achieved, but the mechanical volume and power consumption increase
Solution Approach 1:
The patent extracts only the essential spectral detection function needed for localization and lighting pattern recognition, eliminating unnecessary components. The spectrophotometer is configured to measure specific wavelength ranges (380-780nm with UV extension) rather than full spectral analysis, reducing device complexity and size while maintaining measurement precision for the intended application.
Solution Approach 2:
The measurement parameters are optimized for the specific application: the spectrophotometer focuses on the visible spectrum (380-780nm) with UV extension, rather than measuring the entire electromagnetic spectrum. This parameter optimization reduces the mechanical volume and power requirements while maintaining sufficient precision for indoor/outdoor differentiation and artificial lighting detection.
3Measurement precision
If a spectrophotometer is integrated into eyewear to detect localization and lighting patterns, then accurate detection is achieved, but the power consumption increases
Solution Approach 1:
The spectrophotometer operates periodically rather than continuously, activated only when localization or lighting pattern information is needed. The device can be triggered by specific events (e.g., transition between indoor/outdoor, detection of artificial lighting) rather than continuous monitoring, significantly reducing power consumption while maintaining measurement precision when activated.
Solution Approach 2:
The measurement parameters are optimized to reduce power consumption: the spectrophotometer measures specific wavelength ranges (380-780nm with UV extension) rather than full spectral analysis, and operates at reduced resolution or frequency when full precision is not required. This parameter optimization maintains sufficient measurement precision for the application while reducing energy usage.
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 solution enables accurate detection of indoor versus outdoor conditions regardless of time of day, weather, or season, while also meeting constraints of low power consumption and small mechanical volume, and can detect specific artificial lighting patterns for further actions.
Implementation Method 1
A calculation module for determining a localization of an optical device. The calculation module is configured to receive, from a spectrophotometer of the optical device, data representing a power density of at least two spectral components of the light received by the spectrophotometer
Data Source
AI summary
A calculation module for determining a localization, system, eyewear and computer implemented method. The calculation module is configured to receive, from a spectrophotometer of an optical device, data representing a power density of at least two spectral components of a light received by the spectrophotometer and to determine the localization using the power density of the at least two spectral components.