Dynamic Light-Source Control for Safe Biometric Authentication
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Solution Overview
Problem
Conventional user authentication methods in electronic devices, such as photographing a user's eyeball, often neglect safety standards due to unregulated light sources, posing risks to user safety and requiring a safer and more efficient authentication process.
Innovation Solution
A method and device that determine and adjust light-emitting parameters, including distance, intensity, time interval, and exposure time, of a camera module's light source to ensure user safety and reduce device size, ensuring compliance with safety standards and economical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a configured light source is irradiated without considering surrounding environment or device state, then user authentication can be performed, but user safety is jeopardized
Solution Approach 1:
The light-emitting parameters (intensity, time interval, duration) are made dynamic and adjustable based on detected subject characteristics and environmental conditions, rather than using fixed configured values. The controller modifies these parameters in real-time to balance safety requirements with authentication effectiveness.
Solution Approach 2:
The patent changes multiple light-emitting parameters including intensity, time interval, and duration based on subject detection results and environmental conditions. This allows the system to adapt the light source characteristics to meet safety standards while maintaining authentication capability.
2Reliability
If light-emitting parameters are adjusted to meet safety standards, then user safety is ensured, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it detects subject characteristics, determines environmental conditions, calculates appropriate light-emitting parameters, and controls the light source. This multi-functionality reduces the need for separate dedicated components for each function.
Solution Approach 2:
The system uses feedback from subject detection and environmental sensing to automatically adjust light-emitting parameters. The controller continuously monitors conditions and modifies parameters accordingly, creating a closed-loop control system that simplifies the overall architecture.
3Measurement precision
If multiple parameters are considered for light emission control, then authentication accuracy improves, but processing time increases
Solution Approach 1:
The system performs preliminary detection of subject characteristics and environmental conditions before initiating the authentication light emission. This allows the controller to pre-calculate appropriate parameters, reducing processing time during the actual authentication process.
Solution Approach 2:
The light emission is performed in periodic intervals rather than continuously, with specific time intervals between emissions. This periodic approach allows the system to gather necessary information over time while maintaining authentication accuracy, reducing overall processing time.
Data Source
AI summary
Disclosed are a method and an electronic device for performing user authentication, the method including detecting a subject, determining a light-emitting parameter of a light source when the subject is to be photographed, and acquiring an image of the subject based on the determined light-emitting parameter.