Fingerprint Authentication Cancellation via Contact Duration
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Solution Overview
Problem
Existing terminal devices lack a convenient method to cancel fingerprint authentication mid-process, requiring users to restart the authentication procedure even if the process is incomplete.
Innovation Solution
A terminal device with an input unit, control unit, and display unit that allows for fingerprint authentication cancellation by maintaining contact for a predetermined time or satisfying specific conditions such as releasing pressure or selecting a cancel button, enabling users to cancel authentication without restarting the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fingerprint authentication is performed using contact-based recognition, then authentication security is improved, but the ability to cancel authentication mid-process is worsened (requiring restart from beginning)
Solution Approach 1:
The patent applies dynamics by making the authentication state changeable based on user action duration. The system transitions from a static authentication state to a dynamic one where the authentication can be cancelled if the user maintains contact for a predetermined time or performs specific gestures, allowing flexible cancellation without restarting the entire process
Solution Approach 2:
The patent changes the parameter of contact duration from a simple binary (contacted/not contacted) to a time-based parameter (contacted for predetermined time). This parameter change enables the system to distinguish between intentional authentication and accidental contact, providing a mechanism to cancel authentication mid-process while maintaining security
2Measurement precision
If fingerprint contact is required for authentication, then authentication accuracy is improved, but the complexity of cancellation procedures is worsened
Solution Approach 1:
The patent segments the authentication process into distinct phases: initial contact phase, authentication verification phase, and cancellation phase. By segmenting the process, the system can apply different logic to each phase, allowing accurate fingerprint recognition while providing a separate, simple cancellation pathway through time-based or gesture-based conditions
Data Source
AI summary
A terminal apparatus and a control method are disclosed. The terminal apparatus comprises: an input part for receiving a fingerprint; a control part for performing an authentication procedure with respect to the input fingerprint; and a display part for outputting a notification message if fingerprint authentication with respect to the input fingerprint is completed, wherein the control part sets a fingerprint authentication cancellation mode if contact of the fingerprint lasts for a first predetermined time or more after the fingerprint authentication was completed and can cancel authentication of the fingerprint if a predetermined condition is met.