PROTECTION DEVICE AND METHOD FOR POWER TRANSMITTER
First Claim
1. An apparatus to transmit wireless power, the apparatus comprising:
- a transmit antenna configured to generate a wireless field at a power level sufficient to charge one or more electronic devices;
a driver configured to power the transmit antenna for generation of the wireless field, the power level of the wireless field based at least on a power level of the driver;
a sensing circuit configured to sense, at one or more nodes, wireless power received at the transmit antenna and further configured to generate a monitoring signal based at least on the sensed wireless power received at the transmit antenna; and
a control circuit configured to modify the power level of the driver based at least on the monitoring signal.
1 Assignment
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Accused Products
Abstract
Aspects of a protection circuit and method are disclosed. An apparatus to transmit wireless power comprises a transmit antenna, a driver, a sensing circuit, and a control circuit. The transmit antenna generates a wireless field to charge devices. The driver powers the transmit antenna for generation of the wireless field. A power level of the wireless field is based on a power level of the driver. The sensing circuit senses wireless power received at the transmit antenna and generates a monitoring signal based on the sensed wireless power received at the transmit antenna. The control circuit controls the power level or inhibits the driver from powering the transmit antenna when the monitoring signal indicates that the transmit antenna is receiving wireless power from a foreign antenna.
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Citations
20 Claims
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1. An apparatus to transmit wireless power, the apparatus comprising:
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a transmit antenna configured to generate a wireless field at a power level sufficient to charge one or more electronic devices; a driver configured to power the transmit antenna for generation of the wireless field, the power level of the wireless field based at least on a power level of the driver; a sensing circuit configured to sense, at one or more nodes, wireless power received at the transmit antenna and further configured to generate a monitoring signal based at least on the sensed wireless power received at the transmit antenna; and a control circuit configured to modify the power level of the driver based at least on the monitoring signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of protecting a wireless power transmitter, the method comprising:
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sensing at one or more nodes of the wireless power transmitter for wireless power received at a transmit antenna of the wireless power transmitter, the transmit antenna configured to generate a wireless field at a power level sufficient to charge one or more electronic devices, the wireless power transmitter including a driver configured to power the transmit antenna for generation of the wireless field, the power level of the wireless field based at least on a power level of the driver; generating a monitoring signal based at least on the sensed wireless power received at the transmit antenna; and modifying the power level of the driver based at least on the monitoring signal. - View Dependent Claims (13, 14, 15, 16)
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17. An apparatus for protecting a wireless power transmitter, the apparatus comprising:
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means for generating a wireless field at a power level sufficient to charge one or more electronic devices; means for powering the wireless field generating means to generate the wireless field, the power level of the wireless field based at least on a power level of the powering means; means for sensing wireless power received at the wireless field generating means, the sensing means further configured to generate a monitoring signal based at least on the sensed wireless power received at the wireless field generating means; and means for modifying the power level of the powering means based at least on the monitoring signal. - View Dependent Claims (18, 19, 20)
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Specification