Interactive RFID Tag Switching for Battery-Free Device Control
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Solution Overview
Problem
Existing wireless devices, including RFID devices, face issues such as high power usage, inflexibility in structure and configuration, opacity, large size, and high cost, limiting user customization and efficiency.
Innovation Solution
The integration of a RFID chip with an interactive switch and antenna in RFID tags that transmit signals upon user interaction, allowing for flexible control of electronic devices without the need for physical contact, using various types of switches and indicator elements for feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional wireless devices are used for data transfer and remote control, then wireless communication functionality is achieved, but power consumption is high requiring frequent battery replacement or recharging
Solution Approach 1:
The patent extracts the power source requirement by implementing a passive RFID tag system that harvests energy from the RFID reader's electromagnetic field. The tag contains no battery or power source, eliminating the need for charging or replacement while maintaining wireless communication functionality through electromagnetic energy harvesting.
Solution Approach 2:
The patent replaces the mechanical battery-based power system with an electromagnetic energy harvesting mechanism. The passive tag uses the RFID reader's electromagnetic field to power its circuitry and transmit data, substituting the mechanical battery replacement process with a seamless electromagnetic energy transfer system.
2Adaptability or versatility
If traditional wireless devices are used, then wireless communication is achieved, but the devices are inflexible in structure and configuration requiring users to adapt to fixed configurations
Solution Approach 1:
The patent implements dynamic configurability by allowing RFID tags to be programmed with different data sets and functions after manufacturing. The tag's configuration can be modified remotely through the RFID system, enabling the same hardware to adapt to different applications and user needs without physical reconfiguration.
Solution Approach 2:
The patent creates a universal RFID tag platform that can perform multiple functions depending on its programming. A single tag design can be configured for various purposes such as inventory tracking, access control, or data transmission, making the system versatile and adaptable to different applications without requiring specialized devices for each function.
3Use of energy by moving object
If RFID tags with interactive switches are implemented, then low-power control functionality is achieved, but device complexity increases due to additional components
Solution Approach 1:
The patent merges the switch functionality directly into the RFID tag's existing circuitry. The interactive switch is integrated with the RFID chip and antenna system, allowing the same electromagnetic field that powers the tag to also detect switch actuation. This consolidation adds minimal complexity while maintaining low power consumption.
Solution Approach 2:
The patent uses the electromagnetic field as an intermediary to achieve both power transmission and switch detection functions. The RFID reader's electromagnetic field serves dual purposes: powering the passive tag and detecting changes in the tag's electrical characteristics that indicate switch actuation, thereby eliminating the need for separate power and control mechanisms.
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 efficient, low-power, and customizable control of electronic devices through user interaction, reducing the need for frequent recharging and providing a cost-effective, flexible solution for device control and data transfer.
Implementation Method 1
The antenna is configured to transmit an input signal to the RFID reader when a user physically interacts with the interactive switch
Implementation Method 2
The RFID reader is configured to transmit a control signal to an electronic device upon receiving an input signal
Data Source
AI summary
An RFID tag is provided with an RFID chip and an antenna and interactive switch electrically coupled to the RFID chip. When a user physically interacts with the switch (such as by pressing the switch with a finger), the antenna transmits an input signal to an RFID reader of an RFID-based control system. The RFID reader, in turn, transmits a control signal to an electronic device for controlling the device. The RFID tag may be incorporated into any of a number of devices, such as a keyboard or article of clothing, and can function to operate a variety of electronic devices, including audio-visual devices and gaming systems.