Touch-Sensing Switch for RFID Tag Power Control

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Solution Overview

Problem

Current RFID technology is prone to data theft and malicious tracking due to its 'always-on' nature, and existing deactivation methods are cumbersome, costly, and prone to failure.

Innovation Solution

An RFID-enabled medium with a touch sensing switch coupled to an electrode and a power source, which only provides operating power to the RFID tag during human contact, ensuring the tag is only active when in use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If RFID technology is made 'always-on' for continuous operation, then accessibility and convenience are improved, but security against data theft and malicious tracking deteriorates

Engineering Contradiction:

ImproveaccessibilityVSAvoiddata theft risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The RFID tag transitions from a static 'always-on' state to a dynamic state that activates only when needed. The touch-activated switch changes the operational state of the RFID tag based on user interaction, making it go offline by default and online only when the user intentionally activates it through touch contact.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent replaces traditional mechanical switches with a touch-activated switch that uses capacitive sensing or similar touch-sensitive technology. This substitution eliminates the need for physical mechanical components while providing reliable on/off control, reducing wear and improving reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If a mechanical switch is used to deactivate RFID tags, then security is improved, but device complexity and cost increase

Engineering Contradiction:

Improvedata theft protectionVSAvoidswitch mechanism complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent replaces mechanical switches with a touch-activated switch that uses capacitive sensing or similar touch-sensitive technology. This substitution eliminates the need for physical mechanical components while providing reliable on/off control, reducing wear and improving reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts the switching function from complex mechanical components and integrates it into a simplified touch-sensitive mechanism. By removing the mechanical switch and its associated complexity, the design achieves security functionality with minimal components.

Inventive Principle:

Principle #2Taking out (Extraction)

3Object-affected harmful factors

If a mechanical switch is used for RFID deactivation, then security control is improved, but reliability deteriorates due to physical wear

Engineering Contradiction:

ImproveRFID deactivation controlVSAvoidswitch durability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Reliability

If touch sensing switch is used to control RFID power, then reliability and security are improved, but ease of operation deteriorates due to required human contact

Engineering Contradiction:

Improveswitch reliabilityVSAvoidactivation convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The touch-activated switch automatically detects user interaction through touch contact and activates the RFID tag without requiring any additional manual intervention. The system serves itself by using the user's natural touch action to trigger the appropriate response, eliminating the need for separate activation mechanisms.

Inventive Principle:

Principle #25Self-service

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

This solution reduces the risk of data theft and accidental activation, providing secure RFID operations without compromising data transfer rates, with a higher mean-time-before-failure compared to mechanical switches and no mechanical compression required.

Implementation Method 1

a touch sensing switch coupled to an electrode and a power source, the touch sensing switch adapting the RFID tag to the power source

Methodology Applied

Scientific EffectCapacitive sensing: Capacitance

Implementation Method 2

an RFID tag coupled to an antenna

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Data Source

PatentUS7994920B2RFID security in an RFID-enabled medium

Publication Date: 2011.08.09 LENOVO GLOBAL TECHNOLOGIES SWITZERLAND INTERNATIONAL GMBH

AI summary

Methods and apparatus for Radio Frequency Identification (RFID) security in an RFID-enabled medium, the RFID-enabled medium including an RFID tag coupled to an antenna, and a touch sensing switch, the touch sensing switch coupled to an electrode and a power source, the touch sensing switch adapting the RFID tag to the power source, the RFID security including: sensing, by the touch sensing switch, human contact with the electrode; and providing, by the touch sensing switch only during human contact with the electrode, operating power from the power source to the RFID tag.