Ls Cable & System Ltd.

Banf Co., Ltd.

Sung Han You

Young Sun Kim

Un Kyu Park

Min Seok Han

Lae Hyuk Park

Ji Hyung Lee

Ji Young Song

The present invention relates to a design of a wireless power transmission system and a method for controlling an optimal resonance frequency applied to the system, and provides a wireless power transmission system and a method for controlling an optimal resonance frequency applied to the system, wherein, by a method of designing a power transmission unit to match a frequency control range and by designing a quality factor (Q) of a resonance unit of a power reception unit to be low so that the difference in power reception performance is not large within the control frequency range, power can be received stably even if there is a change in resonance frequencies of a wireless power transmission system installed in a metal environment, and the system frequency can be easily and quickly controlled so as to search for and find the optimal resonance frequency.

Wireless power transmission system for optimal power transmission, and method for controlling optimal resonance frequency of same system

The present invention provides a system and method for measuring the load of a vehicle using an optimal resonant frequency search wireless power transmission system, wherein a wireless power transmission system, which has maximum power transmission efficiency due to effectively searching for an optimal resonant frequency by varying system frequency, is provided in order to supply wireless power to various sensors mounted on wheels and wheel housings, etc. of the vehicle, and the load can be accurately and effectively measured by using the wireless power transmission system without additional sensors or devices.

System and method for measuring load of vehicle using optimal resonant frequency search wireless power transmission system

A dual mode antenna including: an insulative sheet including a main surface and an opposite main surface; a loop-shaped wireless communication coil formed on the main surface of the insulative sheet; a wireless power transmission coil formed inside the loop-shaped wireless communication coil to be electrically disconnected from the loop-shaped wireless communication coil, and formed on the main surface of the insulative sheet, a pair of wireless communication coil connection terminals electrically connected to both ends of the loop-shaped wireless communication coil, respectively; a pair of wireless power transmission coil connection terminals electrically connected to both ends of the wireless power transmission coil, respectively; and a ferrite sheet formed to contact the opposite main surface of the insulative sheet.

Flexible printed circuit board for dual mode antennas, dual mode antenna and user device

A dual mode antenna including: an insulative sheet; a loop-shaped wireless communication coil formed on a front surface of the insulative sheet; and a wireless power transmission coil formed inside the loop-shaped wireless communication coil to be electrically disconnected from the loop-shaped wireless communication coil, and formed on the front surface and a rear surface of the insulative sheet, the wireless power transmission coil being electrically connected from each other via a via-hole passing through the insulative sheet to wirelessly transmit or receive power.

A dual mode antenna including: a wireless communication coil connection terminal; a wireless communication loop antenna electrically connected to the wireless communication connection terminal, and including a loop-shaped wireless communication coil; a wireless power transmission coil arranged inside the wireless communication loop antenna to be electrically disconnected from the wireless communication loop antenna, and configured to wirelessly transmit or receive power; a wireless power transmission coil connection terminal electrically connected to the wireless power transmission coil; and an extension pattern configured to electrically connect the wireless power transmission coil and the wireless power transmission coil connection terminal to each other, and arranged not to overlap with the wireless communication loop antenna.

Disclosed herein are a flexible printed circuit board for dual mode antennas, a dual mode antenna and a user device using the same. The flexible printed circuit board for dual mode antennas includes a first loop-shaped coil formed at one main surface of an insulative sheet and a second loop-shaped coil formed inside the loop of the first coil.

Disclosed are a wireless power receiving apparatus, a wireless power transmission system, and a wireless power receiving method. The wireless power receiving apparatus includes a power receiving coil for receiving a power signal wirelessly transmitted, a rectifier circuit for rectifying the power signal into direct current (DC) output power, a switching unit for controlling input of the power signal to the rectifier circuit at an rear end of the power receiving coil, and a control unit for measuring a voltage of the DC output voltage, comparing the voltage with a predetermined allowable voltage, and controlling an operation of the switching unit.

Growing community of inventors

Seoul, South Korea

Sung Han You