OPTICAL CONTROL OF RFID CHIPS
First Claim
1. A radio frequency identification (RFID) system comprising:
- an RFID chip; and
a photo-active material disposed in proximity to the RFID chip, wherein the photo-active material provides energy in the form of optical frequency radiation to the RFID chip that affects the sensitivity of the RFID chip to a reader signal.
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Accused Products
Abstract
A radio frequency identification (RFID) system includes an RFID chip and a photo-active material disposed in proximity to the RFID chip. The photo-active material provides energy—in the form of optical frequency radiation—to the RFID chip that affects (e.g., enhances or inhibits) the performance of the RFID chip and its sensitivity to a reader signal. An infrared (IR) light illuminating a polished backside of an RFID chip enhances or inhibits a read rate of the RFID chip according to an intensity of the IR light. A method for controlling operation of RFID devices includes illuminating a number of RFID devices by a radio frequency (RF) reader field, the reader field being below an operational threshold of the RFID devices, and optically illuminating a selected one of the RFID devices so that the selected RFID device becomes operational and communicates to the RFID reader.
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Citations
27 Claims
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1. A radio frequency identification (RFID) system comprising:
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an RFID chip; and a photo-active material disposed in proximity to the RFID chip, wherein the photo-active material provides energy in the form of optical frequency radiation to the RFID chip that affects the sensitivity of the RFID chip to a reader signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio frequency identification (RFID) system comprising:
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an RFID chip wherein a backside of the RFID chip is polished; and an infrared (IR) light configured to illuminate the polished backside to enhance or inhibit a read rate of the RFID chip according to an intensity of the IR light. - View Dependent Claims (12, 13, 14, 15)
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16. A method for controlling operation of RFID devices, comprising:
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illuminating a plurality of RFID devices by a radio frequency (RF) reader field, the reader field being below an operational threshold of the RFID devices ; and optically illuminating a selected one of the plurality of RFID devices so that the selected RFID device becomes operational and communicates to the reader. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for radio frequency identification (RFID), comprising:
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generating optical energy at a wavelength affecting operation of an RFID device via a photo-active material in proximity to an RFID chip of the RFID device; and reading the RFID chip under conditions produced by the photo-active material by transmitting an RF signal to the RFID device. - View Dependent Claims (26, 27)
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Specification