Back to results
US 7,612,674 B2Granted
Radio frequency identification system
AssigneesSony Corporation, Sony Electronics Inc.
InventorPeter Shintani
Life of this patent
Estimating the term…
Abstract
A reader emits a low frequency signal to energize a RFID tag. The RFID tag responds with a high frequency signal. An antenna on the RFID tag functions as a resonant circuit upon receiving the low frequency signal to power up the RFID tag. In one embodiment, the high frequency signal is a millimeter frequency signal.
Claims29
A radio frequency identification (RFID) system comprising:
- a radio frequency (RF) reader for transmitting a first RF signal having a first frequency;
- and
- an RFID tag configured to receive the first RF signal and, in response thereto, to transmit a second RF signal having a second frequency, wherein the second frequency is between 30 GHz and 300 GHz and the first frequency is less than 30 GHz.
A method comprising:
- transmitting a first radio frequency (RF) signal having a first frequency from a reader;
- receiving the first RF signal by a radio frequency identification (RFID) tag;
- and
- transmitting, in response to said receiving, a second RF signal having a second frequency by the RFID tag, wherein the second frequency is between 30 GHz and 300 GHz and the first frequency is less than 30 GHz.
1 more element
A radio frequency identification (RFID) tag comprising:
- a processor circuit;
- and
- an antenna coupled to the processor circuit, the antenna being configured to function as a resonant circuit in response to a first radio frequency (RF) signal having a first frequency in order to power said processor circuit, wherein the RFI tag is configured to receive the first RF signal and, in response thereto, to transmit a second RF signal having a second frequency, wherein the second frequency is higher than the first frequency.
A system for implementing Digital Rights Management (DRM) comprising:
- a requesting multimedia device having an associated RFID tag and configured to wirelessly transmit a request to receive DRM-protected content;
- and
- a multimedia content source including a radio frequency identification (RFID) reader, the content source being configured to,
- receive the request from the requesting multimedia device,
- poll the RFID tag of the requesting multimedia device, and
- receive a response signal from the requesting device based on said poll, wherein the response signal has a frequency of between 57 GHz and 64 GHz, and
- transmit the DRM-protected content in response to said response signal.
4 more elements
A radio frequency identification (RFID) system comprising:
- a radio frequency (RF) reader for transmitting a first RF signal having a first frequency and a second RF signal having a second frequency that is higher than the first frequency;
- and
- an RFID tag configured to be energized by the first RF signal and, in response to receiving the second RF signal, the RFID tag being further configured to transmit a third RF signal at a third frequency which is lower than the second frequency.
Dependencies are inferred from the claim text.