Eyewear and receptacles for housing such eyewear include components of a wireless power transfer system. The eyewear includes a receiver system for receiving power from a transmission system associated with the receptacle(s). The receiver system includes at least one receiver antenna, for receiving wireless power from the transmission system, and a repeater antenna for repeating the wireless power signal to the receiver antenna. The receiver antenna is positioned proximate to a first arm of the eyewear and the repeater is positioned proximate to a second arm of the eyewear. Positioning of the receiver and repeater antennas allows for positional freedom of the eyewear and/or the arms of the eyewear, when mechanically received by the receptacle.

A modular wireless power transfer system includes a first wireless transmission system and one or more secondary wireless transmission systems. The first wireless transmission system is configured to receive input power from an input power source, generate AC wireless signals, and couple with one or more other antennas. Each of the one or more secondary wireless transmission systems includes a secondary transmission antenna, the secondary transmission antenna configured to couple with one or more of another secondary transmission antenna, the first transmission antenna, one or more receiver antennas, or combinations thereof. The one or more secondary wireless transmission systems are configured to receive the AC wireless signals from one or more of the first wireless transmission system, another secondary wireless transmission system, or combinations thereof and repeat the AC wireless signals to one or more of the secondary transmission antennas, the one or more receiver antennas, or combinations thereof.

Aspects are described for a device comprising a wireless transceiver configured to receive a radio frequency (RF) emission from a source device, an energy-harvesting unit configured to charge the first device wirelessly, using a first part of the RF emission, and a processor communicatively coupled to the transceiver. The processor is configured to modulate the first part of the RF emission based on information detected by the device and determine that an energy level of the device is above a threshold. The processor is further configured to transmit, in response to determining that the energy level is above the threshold, using the wireless transceiver, the modulated first part of the RF emission to the source device. The processor is further configured to transmit, in response to determining that the energy level is above the threshold, using the wireless transceiver, a second part of the RF emission wirelessly to another device to charge the other device.

A foreign matter detecting device includes a plurality of detection coils disposed so as to be capable of being electromagnetically coupled to each other between a transmission coil of a power transmission device and a reception coil of a power reception device between which power is transmitted in a non-contact manner, a plurality of capacitors each forming a resonance circuit together with each of the plurality of detection coils, a power supply circuit supplying AC power having a predetermined frequency to an input coil that is one of the plurality of detection coils, and a detection circuit detecting a voltage of AC power transmitted via the plurality of detection coils from an output coil that one of the plurality of detection coils and is different from the input coil, and detecting foreign matter entrapped between the transmission coil and the reception coil according to the voltage detected.

A non-contact power supply system is provided employing an electric power transmitting device which can improve the transmission efficiency of electric power, suppressing the circuit scale. The electric power transmitting device is configured with a resonance circuit including a resonance capacity and a resonance coil acting as a transmitting antenna, and a first coil arranged magnetically coupled with the resonance coil. The electric power transmitting device transmits electric power in a non-contact manner using resonant coupling of the resonance circuit. When transmitting the electric power, the electric power transmitting device controls the first coil to connect or disconnect both ends thereof so as to bring a resonance frequency of the resonance circuit close to a frequency of an electric power transmission signal outputted as the electric power to be transmitted.

Systems and methods for modifying the magnitude and/or phase of an electromagnetic field in one or multiple dimensions. Applications for use in charging or powering multiple devices with a wireless power charger system are also described. Applications include beam shaping, beam forming, phase array radar, beam steering, etc. and inductive charging and power, and particularly usage in mobile, electronic, electric, lighting, or other devices, batteries, power tools, kitchen, industrial applications, vehicles, and other usages. Embodiments of the invention can also be applied generally to power supplies and other power sources and chargers, including systems and methods for improved ease of use and compatibility and transfer of wireless power to mobile, electronic, electric, lighting, or other devices, batteries, power tools, kitchen, military, industrial applications and/or vehicles.

A reconfigurable wireless power transfer system includes a first wireless transmission system, one or more secondary wireless transmission systems, and at least one wireless receiver system. The first wireless transmission system is configured to receive input power from an input power source, generate wireless power signals, and couple with one or more other antennas. Each secondary wireless transmission systems is configured to couple with one or more of another secondary transmission antenna, the first transmission antenna, and/or one or more receiver antennas. The secondary wireless transmission systems receive the AC wireless signals from the first wireless transmission system and repeat the AC wireless signals to one or more secondary transmission antennas, receiver antennas, or combinations thereof. The one or more receiver antennas are configured to receive the AC wireless signals to provide electrical power to a load operatively associated with a computer peripheral.

A power receiver includes: a secondary-side resonant coil that includes a resonant coil circuit and receives power from a primary-side resonant coil; a capacitor inserted into the resonant coil circuit; a series circuit including a first switch and a second switch; a first rectifying element having a first rectification direction; a second rectifying element having a second rectification direction; a detection circuit that detects a voltage or a current; a binarization processing circuit that outputs a rectangular wave obtained by binarizing the voltage or the current; a rectangular wave detection circuit that detects a rising or falling timing and a cycle of the rectangular wave; a reference clock generation circuit that generates a reference clock based on the rising or falling timing and the cycle; and a control circuit that generates a control clock used to switch on and off by adjusting a phase or a duty ratio.

A contactless power transmission apparatus includes a receiver that includes a resonant circuit including a receiver coil that receives electric power from a transmitter coil included in a transmitter and a resonant capacitor connected in parallel to the receiver coil. The receiver outputs, through an output coil having fewer turns than the receiver coil and a coil connected to the output coil, electric power received by the resonant circuit and rectifies the output power with a rectifier circuit. The transmitter includes a control circuit that controls a voltage and a switching frequency of alternating current power to be supplied to the transmitter coil from a power supply circuit to allow the contactless power transmission apparatus to continuously perform a constant voltage output operation.

A wireless power supply device includes an electrically-conductive case that accommodates a power transmitting circuit board and a power receiving LC circuit in a resonant cavity formed therein and surrounded by an electrically-conductive plate with both ends of a power transmitting LC circuit being connected to the electrically-conductive plate. In the resonant cavity, a power transmitting coil and a power receiving coil resonate magnetically so as to supply power of an AC voltage signal to a load. The both ends of the power transmitting LC circuit are electrically connected to the electrically-conductive case using a pair of electrically-conductive attachment units configured to attach the power transmitting circuit board to an inner wall surface of the electrically-conductive case.