Inductively powered devices
First Claim
1. An inductively powered device comprising a memory tag and an additional functional device for powering by and communication with a reader device emitting radio frequency signals, adapted such that when the memory tag is powered by a reader device, the additional functional device is also powered by the reader device and carries out its function.
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Accused Products
Abstract
An inductively powered device comprises a memory tag (13) and an additional functional device (10) for powering by and communication with a reader device (11) emitting radio frequency signals. The inductively powered device is adapted such that when the memory tag (13) is powered by a reader device (11), the additional functional device (10) is also powered by the reader device (11) and carries out its function.
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Citations
21 Claims
- 1. An inductively powered device comprising a memory tag and an additional functional device for powering by and communication with a reader device emitting radio frequency signals, adapted such that when the memory tag is powered by a reader device, the additional functional device is also powered by the reader device and carries out its function.
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11. A display device powered by radio frequency communication, the display device comprising:
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an antenna and an induction circuit for obtaining power from radio frequency transmissions provided by a powering device;
display driver circuitry for providing a display data signal to a display; and
a display for displaying an image according to the display data signal. - View Dependent Claims (12, 13, 14, 15)
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- 16. A bistable or multistable display device comprising an antenna, an induction circuit for obtaining power and data from radio frequency signals, a display driver for producing display data signals from the data, and a bistable or multistable display for displaying an image and for modifying the image in response to the display data signals, wherein the image is displayed whether or not the bistable or multistable display device is powered but is modified only when the bistable or multistable display device is powered.
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18. A method of displaying data stored in a memory of an inductively powered memory tag, comprising:
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a reader device providing radio frequency signals to the inductively powered tag with to power the inductively powered tag and to read data from the memory;
the reader device powering an inductively powered display device and providing data for display derived from the data read from the memory to the inductively powered display device, whereby an image is displayed on the inductively powered display derived from the data in the memory. - View Dependent Claims (19, 20)
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21. A method of providing authenticated access to data stored in a memory of an inductively powered memory tag, comprising:
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a reader device powering an inductively powered biometric reader which takes a measurement while the biometric reader is powered by the reader device and provides the measurement to the reader device;
the reader device providing radio frequency signals to the inductively powered tag with to power the inductively powered tag, to provide data derived from the measurement to the inductively powered tag and to read certain of the data from the memory if the data derived from the measurement matches predefined criteria.
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Specification