Patent application number | Description | Published |
20130043734 | WIRELESS POWER RECEIVER WITH MULTIPLE RECEIVER COILS - Systems, methods and apparatus are disclosed for wireless power transfer using multiple receive coils. In one aspect a wireless power receiver is provided that is configured to receive wireless power from a wireless power transmit coil. The wireless power receiver includes a first receive coil having a first mutual coupling with the transmit coil. The wireless power receiver further includes a second receive coil having a second mutual coupling with the transmit coil. The wireless power receiver further includes a load coupled to at least one of the first receive coil and the second receive coil for receiving the wireless power. | 02-21-2013 |
20140266018 | SYSTEMS AND METHODS FOR EXTENDING THE POWER CAPABILITY OF A WIRELESS CHARGER - This disclosure provides systems, methods and apparatus for wireless power transfer. In one aspect, an apparatus transfers energy wirelessly to at least one receive antenna of at least one receiver. The apparatus comprises a first antenna configured to generate a first wireless field when the at least one receiver is in an energy transfer region of the first transmit antenna. The apparatus further comprises a second antenna configured to generate a second wireless field when the at least one receiver is in an energy transfer region of the second transmit antenna. The apparatus further comprises a controller configured to activate at least one of the first antenna or the second antenna based on whether the at least one receiver is in an energy transfer region of one or both of the first and second wireless fields. | 09-18-2014 |
20150019882 | SWITCHING POWER SUPPLY WITH NOISE CONTROL - On embodiment of a device with a noise adaptive power supply includes a noise adaptation unit configured to receive a noise adaptation signal. The noise adaptation unit can provide processing, such as digital filter processing to reduce the effect of power supply noise. In one embodiment, a feedback signal is used to adjust the output voltage of the power supply. The noise adaptation signal can be similar to the feedback signal. The noise adaptation unit can provide the processing in response to the noise adaptation signal. | 01-15-2015 |
20150028801 | SYSTEMS AND METHODS FOR EXTENDING THE POWER CAPABILITY OF A WIRELESS CHARGER - Systems and methods for converting voltages between different voltage levels in a receiver are disclosed. In an aspect, a wireless power receiver apparatus for charging a chargeable device is provided. The wireless power receiver apparatus for charging a chargeable device can include a receive antenna configured to wirelessly receive power at a level sufficient for charging the chargeable device. The wireless power receiver apparatus can also include converter circuitry. The converter circuitry can be coupled to the receive antenna. The converter circuitry can be configured to receive an input voltage derived from the wirelessly received power. The converter circuitry can also be configured to produce an output voltage that is scaled to a value relative to the input voltage based on a relationship between the input voltage and a first voltage level threshold. | 01-29-2015 |
20150028803 | SYSTEMS AND METHODS FOR ENABLING A UNIVERSAL BACK-COVER WIRELESS CHARGING SOLUTION - Systems and methods for converting voltages between different voltage levels in a receiver are disclosed. In an aspect, a wireless power receiver apparatus for charging a chargeable device is provided. The apparatus includes a plurality of receive antennas disposed on a cover of the chargeable device, wherein at least one of the plurality of receive antennas is configured to wirelessly receive power according to a wireless charging protocol different from at least one other of the plurality of receive antennas. The apparatus includes a switching circuit disposed on the cover and configured to receive the wireless power from at least one of the plurality of receive antennas and selectively provide a respective voltage from a corresponding one of the plurality of receive antennas across an output configured to be connected to an input of the chargeable device. | 01-29-2015 |
20150115727 | SYSTEMS, APPARATUS, AND METHOD FOR A DUAL MODE WIRELESS POWER RECEIVER - Systems, methods and apparatus are disclosed for a dual mode wireless power receiver. In accordance with on aspect, an apparatus for receiving wireless power is provided. The apparatus includes a first coil configured to wirelessly receive power from a first transmitter configured to generate a first alternating magnetic field having a first frequency. The apparatus further includes a second coil configured to wirelessly receive power from a second transmitter configured to generate a second alternating magnetic field having a second frequency higher than the first frequency. The second coil is positioned to enclose the first coil. A first coupling factor between the first coil and a coil of the first transmitter is higher than a second coupling factor between the second coil and a coil of the second transmitter when the first and second coils are positioned within respective charging regions of the first and second transmitters. | 04-30-2015 |
20150115885 | VARIABLE WIRELESS POWER TRANSMISSION - Exemplary embodiments are directed to variable power wireless power transmission. A method may include conveying wireless power to a device at a first power level during a time period. The method may further include conveying wireless power to one or more other devices at a second, different power level during another time period. | 04-30-2015 |
20150333797 | SYSTEMS AND METHODS FOR MEASURING POWER AND IMPEDANCE IN WIRELESS POWER CHARGING SYSTEMS - A wireless power transmitter may generate a magnetic field via a transmit antenna to induce voltage in a receive antenna of a wireless power receiver to power the unit and/or charge the receiver's battery. An apparatus for measuring wireless power transfer at an operating frequency between the transmitter and the receiver is provided. The apparatus comprises a first clock configured to generate a first clock signal at a first clock frequency that is higher than the operating frequency of the wireless power transfer. The apparatus further comprises a controller configured to operate based on a second clock signal, the first clock frequency higher than a second clock frequency of the second clock signal. The controller is further configured to measure an amount of wireless power transfer based on the first clock signal. | 11-19-2015 |