Lg Innotek Co., Ltd.

Lg Innotex Co., Ltd.

Jay Park

Soon Young Hyun

Yong Il Kwon

Young Kil Song

Jong Heon Lee

A wireless charging method in a wireless power transmitter, the method including sensing an object in a charging region, measuring a quality factor value, receiving information including a reference quality factor value, detecting a foreign object using the measured quality factor value and the reference quality factor value, and transmitting a response signal that includes ACK information or NAK information depending on whether or not the foreign object is detected. Further, the wireless power transmitter transmits information including a first guaranteed power value when the response signal includes the ACK information, and transmits information including a second guaranteed power value when the response signal includes the NAK information, and the first guaranteed power value is greater than the second guaranteed power value.

Wireless charging method and apparatus therefor

An embodiment of the present invention relates to a wireless charging method in a wireless power transmitter, the method comprising: a step of sensing an object in a charging region; a step of measuring a quality factor value; a step of receiving information including a reference quality factor value; a step of detecting a foreign object by using the measured quality factor value and the reference quality factor value; and a step of transmitting a response signal including ACK or NAK information according to whether or not the foreign object has been detected, wherein the wireless power transmitter transmits information including a first guaranteed power value when the response signal includes ACK information, and transmits information including a second guaranteed power value when the response signal includes NAK information, wherein the first guaranteed power value is greater than the second guaranteed power value.

The present invention relates to wireless power transmission technology, and more particularly, to a wireless power transfer method and a device therefor. The wireless power transfer method may include operating with a first driving voltage, determining whether a ping phase is entered, determining whether the wireless power transmitter is in a first state when the ping phase is entered; and operating with a second driving voltage when the first state is determined.

Wireless power transfer method and device therefor

A method of transferring wireless power using magnetic induction, can include selecting a coil among a plurality of coils partially overlapping each other; sensing a current flowing through the selected coil; receiving an amount of power requested by a wireless power receiver; and controlling an output voltage of a DC-DC converter based on the current flowing through the selected coil and the amount of power requested by the wireless power receiver, in which the controlling the output voltage of the DC-DC converter includes: dividing the output voltage of the DC-DC converter to generate a divided output voltage; and adjusting a level of the output voltage of the DC-DC converter with a feedback signal based on the divided output voltage, in which the dividing the output voltage includes damping the output voltage by a first resistor, a second resistor and a third resistor, and the first resistor is connected between an output terminal of the DC-DC converter and a feedback port of the DC-DC converter, the second resistor is connected between the feedback port of the DC-DC converter and ground, and the third resistor is connected between a controller and the feedback port of the DC-DC converter.

Wireless power transfer system having wireless power transfer system-charger

A wireless power transmitting apparatus can include a first transmitting coil; a second transmitting coil; a third transmitting coil on the first transmitting coil and the second transmitting coil; and a substrate to accommodate the first transmitting coil, the second transmitting coil, and the third transmitting coil, in which the substrate includes a wall to surround a part of an outer circumference of the first transmitting coil and a part of an outer circumference of the second transmitting coil; a first protrusion to surround a first part of an outer circumference of the third transmitting coil; and a second protrusion to surround a second part of the outer circumference of the third transmitting coil, in which the first protrusion comprises a first stepped portion to support the third transmitting coil, and the second protrusion comprises a second stepped portion to support the third transmitting coil.

Wireless power transmitting apparatus

A method for detecting a foreign object of a wireless power transmitting apparatus according to an embodiment of the present invention includes: outputting ping signals periodically for sensing a wireless power receiving apparatus; sensing input current for the ping signals; comparing the sensed input current with a predetermined current value; and when the sensed input current for a plurality of the ping signals exceeds the predetermined current value, determining that there is a foreign object on a surface of the wireless power transmitting apparatus.

Wireless power transmitting apparatus and foreign object detection method of the same

A wireless power transmitting apparatus including a first transmitting coil; a second transmitting coil; a third transmitting coil on the first transmitting coil and the second transmitting coil; and a substrate to accommodate the first transmitting coil, the second transmitting coil, and the third transmitting coil, further the substrate includes a wall to surround a part of an outer circumference of the first transmitting coil and a part of an outer circumference of the second transmitting coil; a first protrusion to surround a first part of an outer circumference of the third transmitting coil; and a second protrusion to surround a second part of the outer circumference of the third transmitting coil.

One embodiment of the present invention can provide: a wireless power transfer system which can reduce the error of the output voltage of a DC-DC transformer, and at the same time, change the magnitude of the output voltage according to the power transfer method and efficiency; and a wireless power transfer system which can variably control an output control port in a control part, and thus actively control the output of the DC-DC transformer regardless of the characteristics of the DC-DC transformer.

Provided is a wireless power transmitting apparatus of a wireless charging system. The wireless power transmitting apparatus of the wireless charging system according to an embodiment of the present invention includes a transmitting coil and a soft magnetic substrate having one side configured to accommodate the transmitting coil, and a groove corresponding to a shape of the transmitting coil is formed in the one side configured to accommodate the transmitting coil.

The wireless power transmitter includes a substrate; a first blocking unit disposed over the substrate and formed of a metallic material; a second blocking unit over the first blocking unit; and a wireless transmission unit mounted on at least one of the first blocking unit and the second blocking unit, wherein the wireless transmission unit includes: a first wireless transmission unit including a first transmission coil; a second wireless transmission unit including a second transmission coil; and a control unit to control such that AC power is output to a transmission coil of one of the wireless transmission units according to a power transmission scheme.

Growing community of inventors

Seoul, South Korea

Jay Park