Fingerprint Sensor Concurrent Notifications for Screen Unlock
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Solution Overview
Problem
Current fingerprint recognition technologies for unlocking screens on intelligent terminals require a lengthy process involving screen activation and verification, leading to a prolonged unlock time.
Innovation Solution
A method where a fingerprint sensor sends concurrent notifications to a control chip and a display driver chip, allowing the display driver chip to prepare the screen for activation while the control chip verifies fingerprint information, thereby reducing the overall unlock time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the user turns on the screen by using a power button or home button before fingerprint verification, then the screen is properly activated for display, but the overall unlock time becomes relatively long
Solution Approach 1:
The display driver chip performs screen preparation work (power-on, resetting, register initialization) in advance upon receiving the second notification from the fingerprint sensor, before the actual fingerprint verification completes. This preliminary action reduces the overall unlock time by overlapping the screen activation process with the fingerprint verification process, rather than waiting for verification to complete first.
Solution Approach 2:
The system maintains continuous useful action by concurrently executing the fingerprint verification process (controlled by the control chip) and the screen preparation process (controlled by the display driver chip). Both processes run in parallel without interruption, maximizing system efficiency and minimizing the total time required for the unlock operation.
2Loss of time
If the fingerprint sensor sends notifications sequentially to the control chip and then to the display driver chip, then the verification process is simple, but the screen preparation delays the unlock time
Solution Approach 1:
The notification process is segmented into two concurrent notification paths: the fingerprint sensor sends a first notification to the control chip for verification and simultaneously sends a second notification to the display driver chip for screen preparation. This segmentation allows independent parallel processing of verification and display activation tasks, improving overall processing efficiency.
Solution Approach 2:
The system merges the verification process and the screen preparation process into a single concurrent execution framework. Both processes are initiated simultaneously upon detecting the fingerprint input, and they proceed in parallel, combining their respective functions to achieve the unlock goal more efficiently than sequential execution would allow.
Data Source
AI summary
A method for unlocking a screen by using a fingerprint includes: sending, by a fingerprint sensor, a first notification to a control chip and concurrently sending a second notification to a display driver chip of a screen when detecting that a finger presses or touches a fingerprint recognition area; completing, by the display driver chip according to the second notification, preparation work before the screen is turned on; verifying, by the control chip according to the first notification, fingerprint information collected by the fingerprint sensor and pre-stored fingerprint information; and if the verification succeeds, unlocking the screen and turning on the screen.