Integrated RFID Tag Circuit for Anti-Theft and Data Transmission
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Solution Overview
Problem
Existing RFID systems face limitations in anti-theft applications and data transmission efficiency, particularly with passive RFID tags having shorter effective sensing ranges and higher costs, and active tags with shorter lifetimes and higher costs.
Innovation Solution
Integration of an RFID tag circuit with an electronic device, including a processor or sensor, that uses an I/O interface, memory, and path-controlling circuits to receive and output signals, enabling secure anti-theft functions and efficient data transmission by storing and transmitting enable marks or measured data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If passive RFID tags are used, then cost and size are reduced, but effective sensing range is shortened
Solution Approach 1:
The patent combines the RFID tag with an electronic device (such as a sensor or processor) into an integrated unit. This merging allows the RFID tag to leverage the existing power supply and processing capabilities of the electronic device, effectively extending its operational range without requiring a separate battery while maintaining the cost and size advantages of passive RFID technology.
2Length of stationary object
If active RFID tags are used, then effective sensing range is extended, but lifetime is shortened and cost increases
Solution Approach 1:
The integrated RFID system utilizes the existing power supply of the electronic device to power the RFID tag, eliminating the need for a separate battery. This self-service approach allows the RFID tag to operate as long as the electronic device is powered, effectively extending the operational lifetime without the constraints of battery life while avoiding the additional cost and size of active RFID tags.
3Reliability
If RFID tag integrates with electronic device, then anti-theft security is enhanced, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by enabling the RFID tag to serve multiple purposes: it can be used for anti-theft protection, data transmission, and identification. By integrating the RFID tag with the electronic device's existing components (processor, memory, power supply), the system achieves enhanced security and versatility without proportionally increasing complexity, as the same components serve multiple functions.
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 anti-theft security by ensuring only authorized use of electronic devices and improves data transmission efficiency through wireless communication, reducing the motives for theft and increasing operational range and cost-effectiveness.
Implementation Method 1
A passive RFID tag, without a built-in battery, receives RF signals from an RFID reader, transforms the RF signals into power for operating the passive RFID tag using an internal circuit
Implementation Method 2
The modulator 15 can modulate the data signal SDATA based on back scatter modulation so that data can be transmitted more effectively. In back scatter modulation, the modulator 15 adjusts its input impedance using the continuous carrier waves sent by the RFID reader 11, and the phases of the carrier waves reflected by the antenna of the RFID tag circuit 10 can thus be adjusted.
Data Source
AI summary
An RFID tag is integrated with a processor of an electronic product for anti-theft purpose. The RFID tag receives an enable mark when the electronic product is checked out at a point of sale. Only when the processor receives the enable mark from the RFID tag can the start-up sequence of the electronic product be executed. An RFID tag is integrated with a sensor of an electronic product for data transmission purpose. Data measured by the sensor can be stored in the memory of the RFID tag and outputted via the antenna of the RFID tag.