WIRELESS POWER SYSTEM WITH CAPACITIVE PROXIMITY SENSING
First Claim
1. A method of wireless power transmission comprising:
- exciting a first part of a wireless power transmission system, via a wireless power transmitter;
detecting, in the presence of a non-charging object, a first change in a first parameter indicative of a coupling between the non-charging object and the first part; and
varying a characteristic of the wireless power transmission based on said first change.
1 Assignment
0 Petitions
Accused Products
Abstract
This disclosure provides systems, methods and apparatus for tuning a transmit coil for operation in a plurality of frequency bands. In one aspect, a method of wireless power transmission is provided. The method includes exciting a first part of a wireless power transmission system, via a wireless power transmitter. The method further includes detecting, in the presence of a non-charging object, a first change in a first parameter. The first parameter is indicative of a coupling between the non-charging object and the first part. The method further includes varying a characteristic of the wireless power transmission based on said first change.
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Citations
87 Claims
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1. A method of wireless power transmission comprising:
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exciting a first part of a wireless power transmission system, via a wireless power transmitter; detecting, in the presence of a non-charging object, a first change in a first parameter indicative of a coupling between the non-charging object and the first part; and varying a characteristic of the wireless power transmission based on said first change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining a distance of an object from a transmit antenna comprising:
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exciting, via the transmit antenna, a first and second part of a wireless power transmission system, the second part being displaced from the first part; detecting, in the presence of a non-charging object, a first change in a first parameter indicative of a coupling between the non-charging object and the first part; detecting, in the presence of the non-charging object, a second change in a second parameter indicative of a coupling between the non-charging object and the second part; and comparing said first and second changes to determine a location of said object. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system configured to provide wireless power transmission comprising:
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a first metal plate; a transmit antenna configured to provide wireless power and to excite the first metal plate; and a circuit configured to detect a first change in capacitance between said transmit antenna and said first metal plate. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A system configured to determine a location of a foreign object in a vicinity of a wireless charging system comprising:
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a first metal plate; a second metal plate displaced from the first metal plate; a transmit antenna configured to provide wireless power and to excite the first and second metal plates; a circuit configured to detect a first change in capacitance between said transmit antenna and said first metal plate; a circuit configured to detect a second change in capacitance between said transmit antenna and said second metal plate; and a circuit configured to compare said first change to said second change to determine the location of said foreign object. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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40. An apparatus for wireless power transmission comprising:
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means for transmitting wireless power and for exciting a first part of a wireless power transmission system; means for detecting, in the presence of a non-charging object, a first change in a first parameter indicative of a coupling between the non-charging object and the first part; and means for varying a characteristic of the wireless power transmission based on said first change. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. An apparatus for determining a distance of an object from a transmit antenna comprising:
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means for transmitting wireless power and for exciting a first and second part of a wireless power transmission system, the second part being displaced from the first part; means for detecting, in the presence of a non-charging object, a first change in a first parameter indicative of a coupling between the non-charging object and the first part; means for detecting, in the presence of the non-charging object, a second change in a second parameter indicative of a coupling between the non-charging object and the second part; and means for comparing said first and second changes to determine a location of said object. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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64. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
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excite a first part of a wireless power transmission system, via a wireless power transmitter; detect, in the presence of a non-charging object, a first change in a first parameter indicative of a coupling between the non-charging object and the first part; and vary a characteristic of the wireless power transmission based on said first change. - View Dependent Claims (65, 66, 67, 68, 69, 70, 71, 72, 73)
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74. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
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excite, via a transmit antenna, a first and second part of a wireless power transmission system, the second part being displaced from the first part; detect, in the presence of a non-charging object, a first change in a first parameter indicative of a coupling between the non-charging object and the first part; detect, in the presence of the non-charging object, a second change in a second parameter indicative of a coupling between the non-charging object and the second part; and compare said first and second changes to determine a location of said object. - View Dependent Claims (75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87)
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Specification