Fingerprint Sensor Power Management via Dynamic Activation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional electronic devices experience unnecessary power consumption due to continuous activation of finger scan sensors during fingerprint recognition, even when authentication is not being performed.

Innovation Solution

The device selectively activates a first processor and finger scan sensor only when biometric data is detected, using a first processor to determine availability and a second processor for authentication, thereby reducing power consumption by deactivating the display until successful authentication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the finger scan sensor is continuously activated to enable fingerprint recognition, then the authentication function is available, but power consumption increases

Engineering Contradiction:

Improveauthentication availabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts the activation state of the finger scan sensor and processor based on authentication requirements. The sensor is activated only when authentication is needed (detected through input events) and deactivated when not needed, transforming the static continuous activation model into a dynamic on-demand model that resolves the contradiction between availability and power consumption

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Instead of continuous activation, the finger scan sensor is activated periodically or event-driven (when input is detected). The system checks for input events at specific intervals and activates the sensor only when necessary, converting continuous operation into periodic operation to reduce overall power consumption while maintaining authentication functionality

Inventive Principle:

Principle #19Periodic action

2Ease of operation

If the display is activated continuously to show authentication interface, then user interaction is enabled, but battery consumption increases

Engineering Contradiction:

Improveuser interaction capabilityVSAvoidbattery consumption

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The system performs preliminary detection of input events before activating the display. When an input event is detected, the system prepares by activating the finger scan sensor first, then activates the display only when authentication data is confirmed, ensuring the display is on only when necessary for user interaction rather than continuously

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses the input detection mechanism to automatically trigger display activation only when needed. The display activates itself in response to detected input events without requiring continuous external control, enabling user interaction only when there is actual input to process, thus avoiding unnecessary energy loss

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS10521575B2Authentication method and electronic device using the same

Publication Date: 2019.12.31 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device and an operating method thereof are provided. The electronic device includes a first processor, a second processor, a display, and a first sensor. The first processor receives an input through the first sensor while the display is in a deactivated state, and transmits the input to the second processor, when biometric data is detected in the input, and the second processor authenticates the biometric data included in the input, and activates the display if the authentication succeeds.