WIRELESS POWER COMMUNICATION
First Claim
1. A remote device for receiving wireless power from a wireless power supply, said remote device comprising:
- an adaptive power receiver capable of receiving power from the wireless power supply through inductive coupling, said adaptive power receiver configurable to a first mode and configurable to a second mode;
a load for receiving electrical power generated in said adaptive power receiver, wherein in said first mode, said adaptive power receiver is capable of storing energy received from the wireless power supply, wherein said second mode, said adaptive power receiver releases said stored energy to said load; and
a controller operably coupled to the adaptive power receiver, said controller capable of controlling power received from the wireless power supply by selectively configuring the adaptive power receiver between said first mode and said second mode;
wherein said controller controls power received by said adaptive power receiver to communicate with the wireless power supply by controlling a duty cycle of said first mode with respect to said second mode over a bit time, wherein increasing said duty cycle increases a duration of time over which said adaptive power receiver is in said first mode, and wherein decreasing said duty cycle decreases said duration of time over which said adaptive power receiver is in said first mode;
said controller capable of communicating to the wireless power supply by selectively adjusting said duty cycle between two values to shift impedance of the remote device, wherein adjusting said duty cycle between two values includes adjusting said duty cycle between one or more intermediate duty cycle values.
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Accused Products
Abstract
A remote device in accordance with the present invention includes an adaptive power receiver that receives wireless power from the wireless power supply by induction. The adaptive power receiver may be switched among two or more modes of operation, including, for example, a high-Q mode and a low-Q mode. By controlling the duty cycle of the switching between modes, the amount of energy received by the adaptive receiver may be controlled to communicate to the wireless power supply. This control is a form of adaptive resonance communication or Q control communication. Distortion can be reduced or eliminated by ramping between duty cycles with adjustment to intermediate duty cycle values.
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Citations
23 Claims
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1. A remote device for receiving wireless power from a wireless power supply, said remote device comprising:
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an adaptive power receiver capable of receiving power from the wireless power supply through inductive coupling, said adaptive power receiver configurable to a first mode and configurable to a second mode; a load for receiving electrical power generated in said adaptive power receiver, wherein in said first mode, said adaptive power receiver is capable of storing energy received from the wireless power supply, wherein said second mode, said adaptive power receiver releases said stored energy to said load; and a controller operably coupled to the adaptive power receiver, said controller capable of controlling power received from the wireless power supply by selectively configuring the adaptive power receiver between said first mode and said second mode; wherein said controller controls power received by said adaptive power receiver to communicate with the wireless power supply by controlling a duty cycle of said first mode with respect to said second mode over a bit time, wherein increasing said duty cycle increases a duration of time over which said adaptive power receiver is in said first mode, and wherein decreasing said duty cycle decreases said duration of time over which said adaptive power receiver is in said first mode; said controller capable of communicating to the wireless power supply by selectively adjusting said duty cycle between two values to shift impedance of the remote device, wherein adjusting said duty cycle between two values includes adjusting said duty cycle between one or more intermediate duty cycle values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for controlling power received from a wireless power supply in a remote device, said method comprising:
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receiving power in an adaptive power receiver via inductive coupling with the wireless power supply; selectively configuring the adaptive power receiver in a first mode in which the adaptive power receiver is capable of storing energy received from the wireless power supply; and selectively configuring the adaptive power receiver in a second mode in which the adaptive power receiver releases stored energy to a load. cycling between the first mode and the second mode at a first duty cycle to control the amount of power received by the adaptive power receiver; cycling between the first mode and the second mode at a second duty cycle to control the amount of power received by the adaptive power receiver; transitioning between cycling between the first mode and the second mode at the first duty cycle and cycling between the first mode and the second mode at a second duty cycle to communicate with the wireless power supply, wherein said transitioning includes cycling between the first mode and the second mode at one or more intermediate duty cycles, said intermediate duty cycles being between said first duty cycle and said second duty cycle. - View Dependent Claims (15, 16, 17, 18)
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19. A wireless power system for transmitting wireless power from a wireless power supply to a remote device and communicating from the remote device to the wireless power supply, said wireless power system comprising:
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a remote device including an adaptive power receiver capable of receiving power from the wireless power supply through inductive coupling, said adaptive power receiver configurable to a first mode and configurable to a second mode; a load for receiving electrical power generated in said adaptive power receiver, wherein in said first mode, said adaptive power receiver is capable of storing energy received from the wireless power supply, wherein said second mode, said adaptive power receiver releases said stored energy to said load; and a controller operably coupled to the adaptive power receiver, said controller capable of controlling power received from the wireless power supply by selectively configuring the adaptive power receiver between said first mode and said second mode; wherein said controller controls power received by said adaptive power receiver to communicate with the wireless power supply by controlling a duty cycle of said first mode with respect to said second mode over a bit time, wherein increasing said duty cycle increases a duration of time over which said adaptive power receiver is in said first mode, and wherein decreasing said duty cycle decreases said duration of time over which said adaptive power receiver is in said first mode; said controller capable of communicating to the wireless power supply by selectively adjusting said duty cycle between two values to shift impedance of the remote device, wherein adjusting said duty cycle between two values includes adjusting said duty cycle between one or more intermediate duty cycle values; and a wireless power transmitter including, an adaptive power transmitter capable of transmitting wireless power to the remote device, said adaptive power transmitter configurable to a first mode and configurable to a second mode; wherein in said first mode, said adaptive power transmitter has a first resonant frequency, wherein in said second mode, said adaptive power transmitter has a second, different, resonant frequency; and a controller operably coupled to the adaptive power receiver, said controller capable of controlling power transmitted by the wireless power supply by selectively configuring the adaptive power transmitter between said first mode and said second mode. - View Dependent Claims (20, 21, 22, 23)
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Specification