Smartcard Alignment Structure for Stable NFC Mobile Enrolment
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Solution Overview
Problem
Biometrically-authorisable smartcards face challenges in mobile enrolment due to inconsistent power supply from smartphones, leading to low success rates and user frustration, especially when positioning the smartcard correctly for near-field communication.
Innovation Solution
A structure is used to align the smartcard with respect to a smartphone during enrolment, utilizing the smartphone's NFC antenna for power supply, with guides and alignment marks to ensure stable energy transfer and ergonomic positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power is supplied via passive enrolment device with internal battery, then smartcard can be powered during enrolment, but device complexity and cost increase
Solution Approach 1:
The smartphone uses its own existing NFC antenna to power the smartcard during enrolment, eliminating the need for separate power supply devices. The smartphone serves dual purposes: both as the enrolment controller and as the power source, thereby reducing overall system complexity and cost.
Solution Approach 2:
The smartphone's NFC antenna is utilized for multiple functions: contactless communication with the smartcard and power transmission during enrolment. This multi-functionality eliminates the need for dedicated power supply hardware, reducing device complexity while maintaining power supply capability.
2Power
If power is supplied via wired connection, then stable power can be provided, but ease of operation and portability decrease
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless electromagnetic field-based power transmission system using NFC technology. This substitution maintains sufficient power stability for enrolment operations while dramatically improving ease of operation and portability, allowing users to enrol smartcards anywhere without physical connections.
3Device complexity
If smartphone NFC field is used for power supply, then device complexity is reduced, but power supply stability becomes inconsistent
Solution Approach 1:
The patent introduces a structure with a guide that positions the smartcard in a specific location relative to the smartphone's NFC antenna. This localized positioning ensures optimal electromagnetic coupling and consistent power transfer, compensating for the otherwise variable power supply characteristics of mobile NFC fields.
Solution Approach 2:
The alignment structure acts as an intermediary between the smartphone and smartcard, ensuring proper positioning and coupling. This intermediary component stabilizes the wireless power transfer by maintaining consistent spatial relationship, thereby improving power supply reliability without adding complex power management systems.
4Reliability
If alignment structure is added, then power supply stability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The alignment structure is implemented as a thin, flexible guide that can be easily manufactured and integrated. This simple structural design provides the necessary positioning functionality to ensure stable NFC coupling while maintaining ease of manufacture and avoiding complex assembly processes.
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
The structure enhances the success rate of mobile enrolment by providing sufficient and stable power, improving user experience and reducing the need for additional hardware, while being cost-effective and environmentally friendly.
Implementation Method 1
power is supplied to the smartcard via a passive enrolment device/sleeve with an internal battery that is arranged to provide power to the smartcard via an electrical connection... Alternatively, power is sometimes supplied to the smartcard via a wired connection to an external power source... However, there are technical constraints from the external power source in relation to the current drawn via this approach
Implementation Method 2
a structure for aligning a biometrically-authorisable smartcard with respect to a smartphone during biometric enrolment of the smartcard... a guide for aligning the structure in a predetermined position with respect to the smartphone
Data Source
AI summary
A structure for aligning a biometrically-authorisable smartcard with respect to a smartphone during biometric enrolment of the smartcard. The structure includes a smartcard area for receiving the smartcard and a guide for aligning the structure in a predetermined position with respect to the smartphone. The alignment structure is configured such that, when the smartcard is received in the smartcard area and the structure is aligned in the predetermined position with respect to the smartphone, the smartcard is located proximate a near field communication antenna of the smartphone such that the smartcard receives power from the antenna.