Fingerprint Detection Component Power Management via Touch Trigger
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Solution Overview
Problem
Fingerprint detection components in terminals consume high power as they are typically always turned on, leading to increased energy usage and reduced battery life in portable devices.
Innovation Solution
A terminal design where the fingerprint detection component is only activated upon receiving a touch signal from the screen, with a processor controlling the component to obtain fingerprint data and execute control instructions only when a match is detected, thereby reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the fingerprint detection component is always turned on to enable immediate fingerprint identification, then the response speed is improved, but the power consumption increases
Solution Approach 1:
The fingerprint detection component operates periodically rather than continuously. It is activated only when a touch event occurs on the screen, and remains inactive during normal operation. This periodic activation pattern reduces power consumption while maintaining responsive fingerprint identification when needed.
Solution Approach 2:
The system dynamically adjusts the operational state of the fingerprint detection component based on user interaction. The component transitions from an inactive state to an active state upon detecting a touch event, and returns to inactive state after processing. This dynamic state management optimizes the balance between response speed and power consumption.
2Reliability
If the fingerprint detection component is always turned on to ensure security functionality is always available, then the reliability is improved, but the loss of energy increases
Solution Approach 1:
The fingerprint detection component is activated periodically only when triggered by a touch event rather than operating continuously. This ensures security functionality is available when needed while avoiding unnecessary energy loss during periods when fingerprint identification is not required.
Solution Approach 2:
The system uses the touch screen interface to automatically trigger the fingerprint detection component only when a user interaction occurs. The touch event itself serves as the activation signal, eliminating the need for continuous monitoring while maintaining security functionality availability.
Data Source
AI summary
A terminal having a fingerprint identification function is provided. The terminal includes: a body having an outside surface; a screen disposed on the outside surface; a fingerprint detection component disposed on the outside surface; and a processor disposed inside the body and electrically connected to the screen and the fingerprint identification component; the processor is configured to turn on the fingerprint detection component to obtain fingerprint data detected by the fingerprint detection component when a touch signal on the screen is received and to execute the preset control instruction if the fingerprint data matches pre-stored reference fingerprint data.