Active Fingerprint Sensor Area Scaling for Security Levels
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Solution Overview
Problem
Existing biometric authentication technologies do not efficiently adapt the active fingerprint sensor area based on security requirements and user-specific digit sizes, leading to potential power wastage and reduced sensor longevity.
Innovation Solution
A control system dynamically adjusts the active fingerprint sensor area based on criteria such as security level, digit size during enrollment, and authentication success rate, activating a larger area for higher security and optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the active fingerprint sensor area is increased to accommodate larger digits or higher security requirements, then authentication reliability is improved, but power consumption increases and sensor longevity decreases
Solution Approach 1:
The patent applies dynamics by making the active fingerprint sensor area adjustable rather than fixed. The system dynamically changes the sensor area size based on real-time factors including digit size detection during enrollment, security level requirements, and authentication success rates. This allows the sensor to activate only the necessary area for each authentication attempt, optimizing the balance between reliability and power consumption.
Solution Approach 2:
The patent changes the parameter of active sensor area size based on multiple criteria. The control system modifies this parameter according to security levels (higher security activates larger area), digit size characteristics captured during enrollment, and historical authentication success rates. This parameter adaptation enables the system to maintain high authentication reliability while minimizing power consumption by avoiding unnecessary activation of the entire sensor array.
2Reliability
If the active fingerprint sensor area is continuously activated at maximum size, then authentication reliability is maintained, but sensor longevity is reduced due to increased wear
Solution Approach 1:
The system dynamically adjusts the active sensor area based on actual authentication needs rather than maintaining maximum activation. By detecting digit size during enrollment and adapting the sensor area accordingly, the system reduces unnecessary wear on the sensor components, thereby extending sensor longevity while maintaining adequate authentication reliability.
Solution Approach 2:
The patent applies partial action by activating only the necessary portion of the sensor array required for each authentication task. Instead of continuously activating the entire sensor area, the system activates only the minimal required area based on digit size and security level, reducing cumulative wear and extending sensor lifespan.
3Use of energy by moving object
If the active fingerprint sensor area is reduced to save power, then power consumption decreases, but authentication reliability may be compromised for larger digits or higher security levels
Solution Approach 1:
The system changes the active sensor area parameter dynamically based on multiple input criteria including security level requirements, detected digit size during enrollment, and historical authentication performance. This ensures that the sensor area is sufficiently large to capture complete fingerprint data for authentication reliability, while being minimized to reduce power consumption when full area activation is not necessary.
Solution Approach 2:
The system uses feedback from authentication success rates and digit size detection to adjust the active sensor area. By continuously monitoring authentication outcomes and adapting the sensor area accordingly, the system maintains adequate reliability for the given security level while optimizing power consumption through data-driven adjustments.
Data Source
AI summary
Methods, devices and systems for controlling an active fingerprint sensor area of a fingerprint sensor system are disclosed. In some examples, the one or more active fingerprint sensor area criteria may involve, or correspond to, a security level. The security level may correspond to a data security level, a software application security level, or a combination thereof. According to some examples, controlling the active fingerprint sensor area may involve activating a relatively larger fingerprint sensor area for a relatively higher security level. Alternatively, or additionally, the one or more active fingerprint sensor area criteria may correspond to a fingerprint sensor area used for obtaining fingerprint sensor data from one or more digits involved in an enrollment process, the size of one or more digits used during the enrollment process, the size of one or more digits used for one or more recent authentication attempts, or combinations thereof.