Mobile Terminal RFID Display Area Detection
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Solution Overview
Problem
Mobile terminal devices with RFID capabilities face challenges in displaying information to users due to the coverage of the display area by RFID tags, which obstruct the view of essential information displayed on the device.
Innovation Solution
The implementation of a mobile terminal device with multiple antennae arranged around the display area, allowing the control unit to detect and display information in parts of the display area not covered by the RFID tag by analyzing electromagnetic wave intensities from these antennae.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display area is made large enough to show all necessary information, then the display capability is improved, but the RFID tag can cover more of the display area, making information invisible to the user
Solution Approach 1:
The patent divides the display area into multiple segments or zones, with different types of information displayed in different areas. Critical information that needs to be visible is placed in regions less likely to be covered by the RFID tag, while other information can be displayed in areas that may be obscured.
Solution Approach 2:
The patent introduces a spatial dimension to the problem by using multiple display areas at different positions. Instead of trying to display all information in one continuous area that gets covered, the system distributes information across multiple spatial locations, allowing users to see at least some information regardless of tag placement.
2Device complexity
If a single loop antenna is used to maintain simple device structure, then device complexity is reduced, but the display area must be enlarged which increases the chance of RFID tag coverage
Solution Approach 1:
The patent segments the antenna system into multiple smaller antenna elements distributed across the device. Instead of one large loop antenna that would require a large display area, multiple smaller antennas can be positioned to provide adequate coverage with a more compact display area.
Solution Approach 2:
The patent combines multiple antenna elements into a coordinated system that works together to provide RFID functionality. By merging multiple smaller antenna segments into a unified antenna array, the device achieves adequate electromagnetic coverage without requiring a large display area.
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 users to view critical information such as read instructions and status messages while holding an RFID tag over the device, enhancing the usability and functionality of the mobile terminal device by accurately determining and displaying information in uncovered areas.
Implementation Method 1
RFID using the frequency band of 13.56 MHz will be described. In RFID using the frequency band of 13.56 MHz, each mobile terminal device has a loop antenna, and the electromagnetic induction system is employed.
Implementation Method 2
The RFID tag uses the RFID technique, and can perform close-proximity wireless communication to exchange information. RFID is an authentication technique that utilizes electromagnetic waves.
Data Source
AI summary
There is provided a mobile terminal device designed to perform wireless communication with an RFID tag being held over the device by using electromagnetic waves. The device includes a plurality of antennae arranged in or in vicinity to a display area of the mobile terminal device, and a control unit configured to detect a part of the display area, which is not covered with the RFID tag, from electromagnetic wave intensities acquired by the plurality of antennae and to display information for a user in the detected part of the display area.