Card Reader Auxiliary Device for Fingerprint Authentication
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Solution Overview
Problem
Existing contactless card readers face challenges in secure authentication due to inconsistent or weak field strength, which can prevent fingerprint cards from obtaining sufficient power for authentication processes.
Innovation Solution
A card reader auxiliary device that detects the presence of a fingerprint card using a contactless field and activates a timer to maintain a stable field strength, ensuring the card receives enough energy for authentication and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the card reader uses contactless field for authentication, then the authentication process can be completed without physical contact, but the field strength may be weak or inconsistent, preventing the fingerprint card from obtaining sufficient power
Solution Approach 1:
The patent combines the card reader and fingerprint card into an integrated device, merging two separate authentication components into one unified system. This integration allows the fingerprint card to be permanently attached to the card reader, ensuring consistent proximity and optimal electromagnetic field coupling, thereby resolving the power insufficiency issue while maintaining contactless operation
Solution Approach 2:
The fingerprint card is pre-mounted on the card reader before the authentication process begins. This preliminary action ensures that the fingerprint sensor is already in position and the electromagnetic field connection is established before authentication is initiated, eliminating delays and ensuring sufficient power transfer from the start
2Loss of energy
If the card reader generates weak field strength, then energy consumption is reduced, but the fingerprint card cannot obtain enough electric energy to perform fingerprint comparison
Solution Approach 1:
The patent applies local quality by concentrating the electromagnetic field energy specifically at the fingerprint card location through optimized coil positioning and field focusing. The field strength is enhanced locally at the card interface while maintaining lower overall system power consumption, enabling reliable authentication without excessive energy use
Solution Approach 2:
The card reader dynamically adjusts the field strength based on the presence and state of the fingerprint card. When the card is detected, the system increases field strength to ensure sufficient power transfer; when no card is present, the field strength is reduced to minimize energy consumption, thus balancing reliability and energy efficiency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the field strength for fingerprint cards, enabling smooth authentication and communication, thereby improving the security and reliability of the authentication process.
Implementation Method 1
the card reader auxiliary device opens contactless field to provide enough field strength for the fingerprint card, so as to make the fingerprint card obtain enough electric energy
Data Source
AI summary
A card reader auxiliary device and a working method thereof, which relate to the field of card readers. The card reader auxiliary device detects whether a card exists based on contactless field of the card reader, when detecting that the card exists, the card reader auxiliary device opens its own contactless field and provides field strength enough for a fingerprint card to enable the fingerprint card to complete fingerprint comparison, the card reader auxiliary device obtains a current time of a timer, determines whether the current time is more than a first preset time, if yes, the card reader auxiliary device closes its own contactless field. According to the embodiments, the fingerprint comparison can be done by a card without updating the card reader, which can make the card communicate smoothly with the card reader.