Contactless IC Card Antenna Coil Orientation Application Selection
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Solution Overview
Problem
Conventional contactless IC cards with multiple applications require complex hardware configurations and user-operated buttons for application switching, leading to increased costs and user inconvenience, especially in high-speed transaction processes like ticketing.
Innovation Solution
A contactless IC card with multiple antenna coils that measure and compare electromotive forces to select and execute applications based on the card's orientation and position relative to the reader/writer, simplifying the hardware configuration and user operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple applications are installed in a single contactless IC card, then the user needs to carry only one card, but it requires complex hardware configuration and user operation for switching between applications
Solution Approach 1:
The antenna coil is divided into multiple independent coils (first antenna coil and second antenna coil), each corresponding to a different application. This segmentation allows the system to select different applications by activating different coils, eliminating the need for complex switching hardware while maintaining multiple application capabilities.
Solution Approach 2:
The patent replaces the mechanical button-based switching system with an electromagnetic field-based selection system. Instead of requiring physical button presses to switch applications, the system uses the reader/writer's electromagnetic field to automatically activate the appropriate antenna coil and corresponding application, eliminating mechanical complexity.
2Ease of operation
If buttons and liquid crystal units are added to the card surface for application selection, then application switching is enabled, but the card structure becomes complicated and breakable
Solution Approach 1:
The patent extracts the application selection function from the card surface itself and relocates it to the interaction between the card's internal antenna coils and the external reader/writer. This removes the need for buttons, liquid crystal displays, and other surface-mounted components that complicate the card structure.
Solution Approach 2:
The patent introduces the reader/writer as an intermediary device that mediates the application selection process. Instead of requiring direct user interaction with the card surface, the user simply presents the card to the reader/writer, which then uses its electromagnetic field to activate the appropriate application through the corresponding antenna coil.
3Adaptability or versatility
If conventional button-based switching is used, then application selection is possible, but it takes time and troubles the user, especially in high-speed transactions
Solution Approach 1:
The patent prepares multiple antenna coils in advance, each pre-configured for a specific application. When the card is presented to the reader/writer, the system immediately activates the appropriate coil based on the reader's electromagnetic field characteristics, eliminating the time required for user deliberation and manual switching.
Solution Approach 2:
The system performs automatic application selection without requiring user intervention. The reader/writer's electromagnetic field automatically triggers the corresponding antenna coil and application, making the switching process transparent and instantaneous for the user.
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
Enables prompt and simple switching between applications without additional surface hardware, improving user experience and reducing operational complexity in high-speed transactions.
Implementation Method 1
the antenna coil 101 which generates an electromotive force by receiving electromagnetic waves from the reader/writer 20
Data Source
AI summary
A contactless integrated circuit (IC) card (11) is comprised of the following: a first antenna coil (102) and a second antenna coil (103) for generating an electromotive force by receiving electromagnetic waves from a reader/writer; a first electromotive force measuring unit (311) and a second electromotive force measuring unit (312) for respectively measuring the electromotive force generated by each of the antenna coils; an electromotive force comparing unit (313) for comparing the characteristics of the electromotive forces which are respectively generated by the respective antenna coils and then measured; and an application selecting/executing unit (215) for selecting one application from a program storing unit (216) based on the comparison made by the electromotive force comparing unit (313) and executing the selected application.