Dual-Wavelength Facial Authentication in Aerosol-Generating Devices

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Solution Overview

Problem

Existing aerosol-generating devices lack effective user authentication and age verification mechanisms, particularly in varying light conditions, which can lead to accidental or unauthorized use by underaged individuals.

Innovation Solution

An aerosol-generating device equipped with an emitter that emits electromagnetic radiation of at least two distinct frequencies, including infrared and visible light, and a detector that captures facial data for user authentication and age verification, using a controller to analyze face proportions and prevent device operation if underaged.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If user authentication is implemented using visible light only, then the device can communicate status to users through visible indicators, but user authentication fails in low light conditions

Engineering Contradiction:

Improvevisible light for user interfaceVSAvoiduser authentication reliability

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The patent combines infrared and visible light emitters into a single authentication system. The infrared emitter enables reliable facial recognition in low light conditions, while the visible light emitter provides user interface feedback through visible indicators. Both emitters work together to resolve the contradiction between visibility and authentication reliability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The authentication system is designed to function universally across different lighting conditions by incorporating dual-wavelength emitters. The system automatically adapts its operation mode based on ambient light levels, using infrared primarily in low light while maintaining visible light capability for user feedback, thus achieving multi-functional adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If only visible light is used for authentication, then the emitter can provide user interface feedback, but authentication accuracy decreases in varying light conditions

Engineering Contradiction:

Improveuser interface feedbackVSAvoidfacial recognition accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent applies different wavelengths of light for different purposes: infrared light is used specifically for facial recognition to ensure measurement precision independent of ambient lighting, while visible light is used specifically for user interface feedback to maintain ease of operation. This local differentiation of function by wavelength resolves the contradiction between interface usability and recognition accuracy.

Inventive Principle:

Principle #3Local quality

3Reliability

If user authentication mechanisms are added to aerosol-generating devices, then safety and age verification are improved, but device complexity increases

Engineering Contradiction:

Improvesafety and age verificationVSAvoidauthentication system structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces traditional mechanical or manual authentication methods (such as physical keys, codes, or supervisor approval) with an optical facial recognition system. This substitution uses non-contact infrared imaging and automated facial feature analysis to verify user identity and age, thereby improving safety while keeping the added complexity manageable through automation rather than manual procedures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enhances safety by preventing underaged users from using the device and ensuring accurate authentication in both bright and low-light conditions, improving device functionality and security.

Implementation Method 1

an emitter, wherein the emitter is configured to emit electromagnetic radiation of at least two distinct frequencies, wherein one of the frequencies is within the infrared spectrum

Methodology Applied

Scientific EffectElectromagnetic radiation emission: Light

Implementation Method 2

a detector, wherein the detector is configured to receive electromagnetic radiation at least in the spectrum of the two distinct frequencies emitted by the emitter

Methodology Applied

Scientific EffectElectromagnetic radiation detection: Photoelectric Effect

Data Source

PatentUS20250338896A1Aerosol-generating device with user authentication

Publication Date: 2025.11.06 PHILIP MORRIS PRODUCTS SA

AI summary

An aerosol-generating device, including: an emitter configured to emit electromagnetic radiation of at least two distinct frequencies, one of the at least two distinct frequencies being within the infrared spectrum and another one of the at least two distinct frequencies being within the visible light spectrum; a detector configured to receive electromagnetic radiation at least in the spectrum of the at least two distinct frequencies emitted by the emitter; and a controller configured to perform facial recognition of a user of the aerosol-generating device for user authentication based upon detector output. A method for performing user authentication in the aerosol-generating device is also provided.