Fingerprint Recognition Unit Sleep Mode Power Management
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Solution Overview
Problem
Fingerprint recognition units in mobile devices consume significant power, reducing battery life and making them less efficient in operation.
Innovation Solution
An electronic device with a touch recognition unit, display unit, and fingerprint recognition unit, where the processor remains in a sleep mode until a valid user's fingerprint input is detected, minimizing power consumption by activating only necessary components when required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fingerprint recognition unit operates continuously to ensure security, then security is enhanced, but power consumption increases significantly
Solution Approach 1:
The fingerprint recognition unit dynamically adjusts its operational state between active and sleep modes based on system state and security requirements. The unit activates only when the processor is in active state or receives specific triggers, rather than operating continuously, thus balancing security with power conservation
Solution Approach 2:
The fingerprint recognition unit performs periodic self-tests at predetermined intervals while in sleep mode to ensure functionality without continuous operation. This periodic activation maintains security readiness while significantly reducing overall power consumption compared to continuous operation
2Speed
If the processor remains in active state to quickly respond to fingerprint input, then response speed is improved, but power consumption increases
Solution Approach 1:
The fingerprint recognition unit performs preliminary self-tests and maintains readiness to activate the processor quickly when needed. By pre-configuring activation conditions and performing periodic checks, the system prepares in advance for potential authentication events without maintaining continuous high-power operation
Solution Approach 2:
The processor dynamically transitions between active and sleep states based on system conditions. It remains in active state only when fingerprint recognition is actually occurring or when security events require immediate response, otherwise it enters sleep mode to conserve power while the fingerprint unit can still trigger activation when needed
Data Source
AI summary
An electronic device, including a touch recognition unit; a display unit receiving a signal from the touch recognition unit; a fingerprint recognition unit receiving a signal from the display unit. A processor is configured to transmit and receive a signal to/from the touch recognition unit, the display unit, and the fingerprint recognition unit. The processor may remain in an inactive state while the touch recognition unit, display unit, and fingerprint recognition unit are activated. The processor is activated when a preset user's fingerprint input is provided. A method operates the electronic device.