WIRELESS LOAD MODULATION
First Claim
1. An apparatus for a wireless power transmitter, the apparatus comprising:
- a coil; and
control circuitry to;
apply a first signal to the coil and measure a change in a current in the coil to discover presence of an object;
provide a second signal to the coil, subsequent to discovering presence of the object;
detect whether the object is a Power Receiver based on whether a load modulated signal is received from the object subsequent to providing the second signal; and
perform power transfer to the object subsequent to detection that the object is a Power Receiver.
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Accused Products
Abstract
Techniques of wireless power transmission are described herein. An example wireless power transmitting apparatus may include a coil and control circuitry. The control circuitry is configured to apply a first signal to the coil and measure a change in a current in the coil to discover presence of an object. The control circuitry is also configured to provide a second signal to the coil, subsequent to discovering presence of the object. The control circuitry is also configured to detect whether the object is a Power Receiver based on whether a load modulated signal is received from the object subsequent to providing the second signal. The control circuitry is also configured to perform power transfer to the object subsequent to detection that the object is a Power Receiver.
5 Citations
16 Claims
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1. An apparatus for a wireless power transmitter, the apparatus comprising:
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a coil; and control circuitry to; apply a first signal to the coil and measure a change in a current in the coil to discover presence of an object; provide a second signal to the coil, subsequent to discovering presence of the object; detect whether the object is a Power Receiver based on whether a load modulated signal is received from the object subsequent to providing the second signal; and perform power transfer to the object subsequent to detection that the object is a Power Receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for a wireless power receiver, the apparatus comprising:
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a coil; and control circuitry coupled to the coil, the control circuitry to be configured to; detect a signal at the coil to determine that the coil has coupled to a wireless power transmitter; encode a load modulated message for transmission by the coil, responsive to detecting the signal at the coil; and control the power reception circuitry to receive power from the wireless power transmitter. - View Dependent Claims (9, 10, 11)
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12. A method for wireless power transmission, the method comprising:
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applying a first signal to a coil and measuring a change in a current in the coil to discover presence of an object; providing a second signal to the coil, subsequent to discovering presence of the object; detecting whether the object is a Power Receiver based on whether a load modulated signal is received from the object subsequent to providing the second signal; and performing power transfer to the object subsequent to detection that the object is a Power Receiver. - View Dependent Claims (13, 14, 15, 16)
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Specification