Patent ID: 6816063
Filing Date: 2004-11-09
Classification: G06K

Abstract:
A system for remotely causing operation of a particular unit of electronic circuitry among a plurality of electronic circuitry, comprising:a plurality of units of the electronic circuitry, each of the units of electronic circuitry having first and second states, each of the units of electronic circuitry being powered by a limited capacity power supply, a first of the states using zero power from the power supply, a second of the states being an operational power-on state using power from the power supply; a base station for sending a wake-up signal only at a specific time at which it is desired to change the state of the particular unit of the electronic circuitry from the first state to the second state; a separate radio frequency identification tag electrically connected to each of the units of the electronic circuitry, only a specific one of the tags being responsive to the wake-up signal to cause the state of the respective connected particular unit of the electronic circuitry to change between the first state and the second state; and the base station sending successive ones of the wake-up signals only at separate specific times at which it is desired to change the state of the particular unit of the electronic circuitry from the first state to the second state, the duration of the second operational state of the particular unit of electronic circuitry being short relative to the time between successive wake-up signals for the particular unit of electronic circuitry, and wherein the particular unit of electronic circuitry returns to the first state at the end of the duration of the second state.