초록 ▼

A power transmission system using directional ultrasound for power transmission includes a transmitting device and a receiving device. The transmitting device has a set of ultrasound transducers forming an ultrasound transducer array, wherein the array is a set of spaced individual transducers place

A power transmission system using directional ultrasound for power transmission includes a transmitting device and a receiving device. The transmitting device has a set of ultrasound transducers forming an ultrasound transducer array, wherein the array is a set of spaced individual transducers placed in the X-Y plane disposed to generate an ultrasound beam in the Z direction.

대표청구항 ▼

1. A power transmitting device of wireless power transmission system using ultrasound, comprising:a power processor receiving power from a power source; andan ultrasound power unit using power derived from the power source for generating at least one directional ultrasound beam, the ultrasound power

1. A power transmitting device of wireless power transmission system using ultrasound, comprising:a power processor receiving power from a power source; andan ultrasound power unit using power derived from the power source for generating at least one directional ultrasound beam, the ultrasound power unit including:a set of ultrasound transducers forming an ultrasound transducer array, wherein the array is a set of spaced individual transducers placed in the X-Y plane disposed to generate an ultrasound beam in the Z direction. 2. The device of claim 1 further comprising:a phase shifter for each transducer;a clock generator generating an input for the phase shifter;a controller for controlling the ultrasound beam and processing an input indicating a location of a receiving device; thereby powering the receiving device using directional ultrasound. 3. The device of claim 1, wherein the power source is an AC power source or a DC power source. 4. A wireless power transmission system using ultrasound, comprising:a power transmitting device of wireless power transmission system using ultrasound, comprising:a power processor receiving power from a power source;an ultrasound power unit using power derived from the power source for generating at least one directional ultrasound beam, the ultrasound power unit including:a set of ultrasound transducers forming an ultrasound transducer array, wherein the array is a set of spaced individual transducers placed in the X-Y plane disposed to generate an ultrasound beam in the Z direction; anda power receiving device disposed within the ultrasound power unit and having a driver and receiver control electronics for controlling a transmit/receive switch or a voltage regulator. 5. The system of claim 4, wherein the power receiving device is a cell phone, a PDA, a notebook computer, or a Wi-Fi device. 6. The system of claim 4, wherein the power transmitting device further comprising:a phase shifter for each transducer;a clock generator generating an input for the phase shifter;a controller for controlling the ultrasound beam and processing an input indicating a location of the receiving device; thereby powering the receiving device using directional ultrasound. 7. The system of claim 4, wherein the power source is an AC power source or a DC power source. 8. The system of claim 4, wherein the power receiving device is free from having an internal power source and is powered only by the power transmitting device. 9. A method comprising the steps of:determining a position for at least one receiving device, in a power transmitting device of a wireless power transmission system using ultrasound, wherein the power transmitting device comprises:a power processor receiving power from a power source; andan ultrasound power unit using power derived from the power source for generating at least one directional ultrasound beam, the ultrasound power unit including:a set of ultrasound transducers forming an ultrasound transducer array, wherein the array is a set of spaced individual transducers placed in the X-Y plane disposed to generate an ultrasound beam in the Z direction; andsending the ultrasound beam thereto. 10. The method of claim 9, wherein the determining step includes upon receiving an ultrasound acquisition pulse by a power receiving device, the power receiving device sends out a positioning signal indicating a position of the power receiving device, thereby the at least one directional ultrasound beam is directed toward the receiving device for power transmission.