Abstract: Techniques for charger-device pairing for recharge warnings are described. In one or more implementations, a battery of a device is determined to require charging based on a state of charge of the battery. In response to this determination, a message is communicated via a local network from the device to a charger that was previously paired with the device. The message includes a request for the charger to generate a first alert indicating that the charger is available to charge the battery of the device. In addition, the device provides a second alert indicating that the battery of the device requires charging.

Abstract: A method and system for providing wireless power transfer through a metal object by forming a loop conductor from the metal object through a feature or component embedded within the metal object and by replacing portions of the metal object with insulating components. The method and system utilize a recessed channel to install and isolate conductors that are connected to transmitter or receiver circuits and enable wireless power transfer and other communications. The recessed channel creates a loop around at least a portion of the metal object such that the conductor installed therein may form a loop conductor, which may be connected to a source or sink. In some implementations, a logo embedded within the metal object may create a loop formed by the metal object with a current path around the logo, wherein the metal object itself may be configured to operate as the conductor.

Abstract: Embodiments include devices and methods for navigating an unmanned autonomous vehicle (UAV) based on a measured magnetic field vector and strength of a magnetic field emanated from a charging station. A processor of the UAV may navigate to the charging station using the magnetic field vector and strength. The processor may determine whether the UAV is substantially aligned with the charging station, and the processor may maneuver the UAV to approach the charging station using the magnetic field vector and strength in response to determining that the UAV is substantially aligned with the charging station. Maneuvering the UAV to approach the charging station using the magnetic field vector and strength may involve descending to a center of the charging station. The UAV may follow a specified route to and/or away from the charging station using the magnetic field vector and strength.

Abstract: An apparatus and method for transmission of wireless power to a plurality of chargeable devices. The apparatus and method include and provide for a wireless power transmitter including a power transmitting element configured to use a current at a first level to wirelessly transmit power sufficient to provide power to one or more chargeable devices positioned within a charging region. The apparatus and method further include and provide for a controller to detect a subsequent chargeable device positioned within the charging region and to adjust the current from the first level to a default level prior to communication with the subsequent chargeable device.

Abstract: Wireless power transfer for integrated cycle drive systems is described. A cycle power system includes a rim that is connected to, and positioned concentrically with, a sealed housing that can rotate about an axis. The cycle power system also includes an integrated drive system disposed within the housing. The integrated drive system includes a battery and a motor for driving a cycle by causing rotational movement of the rim about the axis. Additionally, the cycle power system includes an inductive structure that is disposed within the housing, and that wirelessly charges the battery through induction between the inductive structure and remote a charging station.

Abstract: Exemplary embodiments of the present disclosure are related to a wireless power resonator and method that includes a wireless power transmit element. The wireless power transmit element may include a substantially planar transmit antenna configured to generate a magnetic field and formed from a conductive trace including a plurality of distributed inductive elements along the conductive trace. The transmit element may further include a filter formed from selected ones of the plurality of distributed inductive elements of the planar transmit antenna and configured to generate at least one frequency response.

Abstract: A wireless power transmitter system includes: a power delivery structure comprising power transmitting elements (power transmitting elements), each of which is configured to induce a field, and configured to adapt to an exterior shape of an entity that contains a receiver; a power circuit configured to provide power to the power transmitting elements selectively; and a controller configured to: determine an electrical characteristic, other than power transfer to the receiver, associated with actuating at least one of the power transmitting elements; determine at least one power transmitting element subset, based on the electrical characteristic, containing less than all, and at least one, of the power transmitting elements; select, based on power transferred to the receiver, one or more charging power transmitting elements to use to charge the receiver wirelessly; and cause the power circuit to provide power to the one or more charging power transmitting elements.

Abstract: The present disclosure describes aspects of injected conductive tattoos for powering implants. In some aspects, a system comprises a conductive tattoo used to efficiently transfer power wirelessly received from a transmitter outside a body to an electronic device in the body. The conductive tattoo is formed from a conductive material injected into an outermost permanent layer of the body. The conductive tattoo is configured to wirelessly receive and relay the power from the transmitter to the electronic device. In particular, the conductive tattoo may transfer the power to the electronic device over a coupling between the conductive tattoo and the electronic device.

Abstract: Certain aspects of the present disclosure are generally directed to apparatus and techniques for protecting electronic devices that may be prone to damage by wireless charging fields. For example, the apparatus may include a wireless charging circuit configured to selectively generate a wireless charging field and an impedance detection circuit coupled to the wireless charging circuit and configured to detect an impedance change corresponding to the wireless charging field. In this case, a proximity detection circuit may selectively detect proximity of one or more electronic devices that are prone to damage by the wireless charging circuit. In some aspects, detecting the proximity of the one or more electronic devices is activated based on detecting the impedance change, and wherein generating the wireless charging field comprises reducing a transmit power of the wireless charging field based on detecting the impedance change.

Abstract: Exemplary embodiments are directed to controlling impedance. A wireless power transmitter for controlling impedance comprises a transmit circuit configured to wirelessly transmit power to a plurality of receivers, each having a load resistance, within a charging region of the transmit circuit. The transmitter also comprises a controller configured to request each receiver of the plurality of receivers to adjust its load resistance to a value that achieves a target total impedance as presented to the controller.

Abstract: This application describes methods and apparatus for controlling touchscreen interferences. In one aspect, a wireless power device for receiving charging power via a wireless charging field of a wireless charging device is provided. The wireless power device comprises a sensor circuit configured to detect at least one signal from a touchscreen, the detected at least one signal indicating an interaction with the touchscreen. The wireless power device further comprises a processor circuit configured to determine whether the detected at least one signal is a result of a false contact with the touchscreen resulting from the wireless charging field. The wireless power device further comprises a transmitter circuit configured to transmit, based on determining that the detected at least one signal is a result of the false contact with the touchscreen, a first message to the wireless charging device to lower a strength of the wireless charging field.

Abstract: A method of providing power to an implant includes: transcutaneously receiving first power wirelessly from a source transmitter by a receiver of a power relay device, the receiver of the power relay device being disposed inside a biological body and closer to a skin of the biological body than the implant is to the skin of the biological body; converting the first power into second power that has a substantially different frequency than the first power, or is of different type of power than the first power, or both; and internally coupling the second power from a transmitter of the power relay device to the implant disposed within the biological body.

Abstract: A wireless power transfer adapter is provided. The wireless power transfer adapter comprises a receive coil configured to receive wireless power from a wireless power transmitter at a first frequency associated with a first wireless power protocol of a plurality of wireless power protocols. The wireless power transfer adapter comprises a rectifier circuit configured to convert the wireless power received by the receive coil from the first frequency to a second frequency associated with a second wireless power protocol of the plurality of wireless power protocols that is different from the first protocol. The wireless power transfer adapter comprises a transmit coil configured to transmit at least some of the wireless power to a wireless power receiver at the second frequency and according to the second wireless power protocol.

Abstract: A system and method for charging a chargeable device is provided. The system can include a wireless charger including a wireless power transmitter d configured to generate a wireless charging field in at least one charging region. The wireless charger further includes a transceiver configured to communicate with the chargeable device. The wireless charger further includes a controller configured to facilitate avoidance of cross connection of the chargeable device with the wireless charger and at least one other wireless charger by initiating a disconnection of a communication link between the wireless charger and the chargeable device based at least in part on a comparison of a detected power level of the wireless charger to a predetermined level indicative of saturation.

Abstract: A multi-level rectifier is presented that is suitable for use at high frequencies, including into MHz range such as in the 6.78 MHz band used for wireless power transfer. Depending on the amplitude of the input waveform, the rectifier can be operated in different modes. For lower input levels, the rectifier acts as a voltage doubler. For higher input levels, the impedance of the rectifier can be varied based on the input level. The rectifier is a synchronous rectifier with a front section and a back section, where the impedance is varied by changing the phase of the control signal of the back section relative to that of the front section.

Abstract: A reconfigurable wireless power transmit antenna includes an antenna coil configured in a first configuration having a first number of turns configured to operate at a first frequency, the antenna coil configurable in a second configuration having a second number of turns configured to operate at a second frequency, and a switching mechanism configured to switch between the first configuration and the second configuration.

Abstract: A wireless power receiver includes a first receive coil configured to generate electrical current in response to a first external magnetic field generated by a transmit coil, and a second receive coil configured to generate electrical current in response to a second magnetic field generated by eddy currents induced in a metal portion of the wireless power receiver in response to the first external magnetic field.

Abstract: Aspects comprise apparatus and methods for wirelessly powered lighting products. One aspect comprises an apparatus that generates light from a wirelessly coupled power source. The apparatus comprises a first conductive loop configured to enclose an area, the first conductive loop configured to resonate and generate an induced current when excited by a magnetic field generated by a transmitter. The apparatus further comprises a first set of one or more capacitive elements coupled to the first conductive loop, the coupled first conductive loop and first one or more capacitive elements configured to form a first resonant circuit. The apparatus also comprises a first set of one or more lighting devices integrated with the first conductive loop, the first set of one or more lighting devices each configured to generate a light based on the induced current that flows through the first set of one or more lighting devices.

Abstract: A biomedical system includes: a medical implant capsule including an outer body, an electric device retained by the outer body, and a power input coupled to the electric device, the medical implant capsule having a length, along an axis, and a width transverse to the axis; and an antenna coupled to the power input and configured to: receive power wirelessly and to deliver the power to the power input; wrap around the medical implant capsule, in a transit state, transverse to the length of the medical implant capsule for a distance greater than the width of the medical implant capsule; and expand to a deployed state, at least part of the antenna being further from the axis in the deployed state than in the transit state.

Abstract: Exemplary embodiments are directed to wireless power. A wireless charging device may comprise a charging region configured for placement of one or more chargeable devices. The charging device may further include at least one transmit antenna configured for transmitting wireless power within the charging region. Furthermore, the charging device is configured to exchange data between at least one chargeable device of the one or more chargeable devices.