Passive wireless keyboard powered by key activation
First Claim
1. A computer system, comprising:
- a monitor;
a processor;
a reader comprising a source of an interrogating field and a decoder; and
a wireless keyboard having a plurality of keys, one or more transponders, one or more mechanical to electrical energy converters responsive to key activation and providing power to said one or more transponders, and one or more antennas coupled to said one or more transponders and modulating said interrogating field with a coded signal in response to key activation.
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Accused Products
Abstract
A wireless controller, such as a keyboard, and reader combination comprises a controller having a plurality of keys, one or mechanical to electrical energy converters providing energy from key activation, an antenna, and one or more passive transponder circuits, coupled to the antenna and associated with the keys. The passive transponder circuits provide a coded response identifying a key in response to key activation employing power from the key activation to modulate the interrogating field. In particular backscatter modulation using the reflected interrogating field may be employed. An associated reader includes a source of the interrogating field applied to the antenna of the keyboard and a decoder for determining the coded response from the passive transponder circuits.
23 Citations
20 Claims
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1. A computer system, comprising:
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a monitor; a processor; a reader comprising a source of an interrogating field and a decoder; and a wireless keyboard having a plurality of keys, one or more transponders, one or more mechanical to electrical energy converters responsive to key activation and providing power to said one or more transponders, and one or more antennas coupled to said one or more transponders and modulating said interrogating field with a coded signal in response to key activation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless controller system, comprising:
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a reader comprising a source of an interrogating field and a decoder; and a wireless controller having one or more manually activated inputs, one or more transponders, one or more mechanical to electrical energy converters, and one or more antennas coupled to said one or more transponders and modulating said interrogating field with a coded signal in response to activation of an input employing energy from said one or more mechanical to electrical energy converters. - View Dependent Claims (11, 12, 13)
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14. A method for short range wireless transmission of data between a controller having one or more manually activated inputs and one or more antennas, wherein the one or more antennas are adapted to couple to an interrogating field, and a receiver, the method comprising:
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providing an electromagnetic interrogating field; modulating the interrogating field with a coded response employing energy from activation of the one or more inputs; and detecting the modulated reflected field at the receiver. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification