Samsung Electro-mechanics Co., Ltd.

Wits Co., Ltd.

Soon Tack Oh

Jae Suk Sung

Ki Won Chang

Chul Gyun Park

Chang Soo Kang

Ji Hoon Kim

Si Hyung Kim

Sung Uk Lee

Hyun Keun Lim

Hee Sun Han

Seung Won Park

Sang Ho Cho

Sung Soo Lee

Byoung Woo Ryu

Young Seung Roh

Eun Young Shin

Jae Hyoung Cho

Chul Wan Park

A power transmitter includes: a first resonator configured to wirelessly supply power to a power receiver and having an impedance that changes in response to a foreign material being proximate to the power transmitter; a second resonator having an impedance that changes in response to the foreign material being proximate to the power receiver; and controller configured to select either one of the first resonator and the second resonator in response to a wireless charging control, and to determine whether the foreign material is proximate to the power transmitter, based on a change in the impedance of the selected one of the first resonator and the second resonator.

Wireless power transmitter

There are provided a non-contact power supply device and a non-contact power supply method, in which a short beacon is transmitted to recognize a power receiving device, a long beacon is transmitted to wake-up a communications circuit of the power receiving device, and charging power is transmitted in a contactless manner, wherein at least one of signal levels of the short beacon and signal levels of the long beacon is varied.

Non-contact power supply device and non-contact power supply method

A non-contact type power supplying apparatus may be capable of detecting another power receiving apparatus even during the charging. The non-contact type power supplying apparatus may include: a first output unit outputting a detection signal detecting a power receiving apparatus; and a second output unit outputting a wake-up signal waking-up a communications circuit of the detected power receiving apparatus when the power receiving apparatus is detected, thereby making it possible to supply power to the detected power receiving apparatus using a non-contact type method.

Non-contact type power supplying apparatus and non-contact type power supplying method

A wireless power transmitting method performed in a wireless power transmitting apparatus wirelessly transmitting power includes determining reception strength of a short-range wireless communication channel, adjusting an interval of a short beacon signal in response to a change in reception strength; and transmitting the short beacon signal at the interval.

Wireless power transmitting apparatus and method

A non-contact type power transceiving apparatus may include: a non-contact type power transmitting apparatus adjusting bias power setting a level of transmission power based on a request and transmitting one of a first power and a second power having a power level higher than that of the first power in a non-contact scheme; and a non-contact type power receiving apparatus requesting one of the first power and the second power from the non-contact type power transmitting apparatus and varying a set temperature level determining an abnormal state based on the requested power.

Non-contact type power transmitting apparatus, non-contact type power receiving apparatus, and non-contact type power transceiving apparatus

A coil device may be capable of varying the gap of a coil so that several devices may be wirelessly charged simultaneously or a single device may be wirelessly charged with concentrated power. The coil device may include: a case having a reception space and varying a charging area upon a user's selection; and a coil part, having, in the reception space of the case, a coil body formed of a wound conductor having a predetermined length. A gap of the wound conductor of the coil body varies as the charging area of the case varies.

Coil device, and wireless power transmitter and wireless power receiver having the same

Growing community of inventors

Suwon-si, South Korea

Soon Tack Oh