Tiered Biometric Wake Strategy for Power Reduction
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Solution Overview
Problem
Current digital devices with finger scanners face high power consumption issues, necessitating a solution for minimal power operation while maintaining effective user authentication.
Innovation Solution
A biometric authentication apparatus employing a tiered wake-on-event strategy, where a sensor initially detects a biometric object's presence using low-power bulk detection, followed by more detailed analysis to confirm the presence of a finger before powering up the host device, thereby reducing false wake-ups and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the sensor computing device is kept powered on continuously to ensure immediate authentication, then authentication response time is improved, but power consumption increases
Solution Approach 1:
The bulk biometric object detector performs preliminary detection of finger presence before activating the full sensor computing device. This preliminary action allows the system to screen out non-biometric objects early, preventing unnecessary full-device activations and reducing overall power consumption while maintaining quick response when genuine fingers are detected
Solution Approach 2:
The system dynamically adjusts its operational state based on detection needs. The sensor computing device transitions between powered-off, powered-down, and fully-powered states depending on whether a biometric object is detected. This dynamic state management optimizes the balance between response time and power consumption
2Speed
If the host device is powered up immediately upon any sensor detection, then authentication speed is improved, but false wake-ups increase power consumption
Solution Approach 1:
The bulk detector performs preliminary screening to identify potential biometric objects before triggering the host device to power up. This preliminary detection layer filters out non-biometric detections, ensuring that the energy-intensive host device activation only occurs when genuinely relevant objects are detected
Solution Approach 2:
The sensor computing device acts as an intermediary between the bulk detector and the host device. It processes detection data and determines whether activation is warranted, serving as a intelligent mediator that prevents false wake-ups from reaching the host device
3Measurement precision
If detailed biometric analysis is performed continuously, then authentication accuracy is improved, but power consumption increases
Solution Approach 1:
The system performs preliminary bulk detection to identify potential biometric objects before initiating detailed biometric analysis. This two-stage approach ensures that computationally intensive and power-consuming detailed analysis is only performed when necessary, maintaining high accuracy while minimizing overall power consumption
Solution Approach 2:
The system applies partial action by performing only the necessary level of analysis at each stage. Bulk detection provides coarse filtering, and detailed analysis is applied selectively to promising candidates. This partial application of analysis power maintains accuracy while avoiding wasteful full-power operation
Data Source
AI summary
A biometric authentication apparatus and method is disclosed which may comprise a biometric authentication unit which may comprise: a biometric object sensor comprising sensor elements and a sensor computing device; a wake-on-event logic controller maintaining the sensor computing device in one of a powered-off or powered down mode, and including a bulk biometric object detector configured to detect a biometric object on or in the vicinity of the sensor elements and to power-on or power-up the sensor computing device responsive to the detection of the biometric object on or in the vicinity of the sensor elements; the sensor computing device configured to analyze one or more lines of biometric object image comprising a partial biometric object image and determine if the partial biometric image belongs to a biometric object desired to be imaged to obtain a complete biometric object image, and to provide a power-on or power-up signal to a host electronic device computing device when the partial biometric image is determined to belong to a biometric object desired to be imaged.