Lg Innotek Co., Ltd.

Korea Advanced Institute of Science and Technology

Samsung Electronics Co., Ltd.

Samsung Electro-mechanics Co., Ltd.

Samsung Display Co., Ltd.

Shin Young Cho

Gun Woo Moon

Sang Wook Kwon

Nam Yun Kim

Ki Young Kim

Chi Hyung Ahn

Chong Eun Kim

Bong Chul Kim

Don Sik Kim

Jung Tae Kim

Sang Cheol Moon

Jae Kuk Kim

Jong Hyun Lee

Won Sik Oh

Dae Youn Cho

Dong Young Huh

Sungeun Kim

Dong Keun Yoon

Kyu Min Cho

Taeyong Kim

Dongyoung Huh

Hyunkwan Lee

A method and an apparatus for controlling wireless power transmission are provided. An apparatus for controlling wireless power transmission includes a controller configured to determine an output voltage of a power factor correction unit based on charging information of a battery, the power factor correction unit configured to correct an input voltage into the determined output voltage, and output a variable voltage, and a resonance unit configured to transmit power converted from the variable voltage to a wireless power reception apparatus.

Method and apparatus for controlling wireless power transmission

A lighting device according to an embodiment of the present invention comprises: a heat dissipating frame having a receiving recess formed therein and a plurality of insertion holes formed in the upper surface thereof; a light source module mounted on an upper surface of the heat dissipating frame, and including a first substrate in which a plurality of coupling holes is formed at positions facing the plurality of insertion holes; and a control module received in the receiving recess of the heat dissipating frame, and including a second substrate having a plurality of connecting terminals formed on a side surface thereof and projecting in a lengthwise direction, wherein the control module is disposed vertically upright within the receiving recess such that the plurality of connecting terminals faces upward, and the plurality of connecting terminals is inserted in the plurality of insertion holes and the plurality of coupling holes is connected to the light source module.

Lighting device

A dimming circuit includes an active dimmer configured to apply input power Vin to an amplification module or an error compensation module, the amplification module configured to amplify an output current of the active dimmer, and the error compensation module configured to correct an error or distortion of the amplification module. The amplification module and the error compensation module are connected in a feedback form.

Dimming circuit

Disclosed are a wired-wireless combined power transmission apparatus and a method using the same. The wired-wireless combined power transmission apparatus includes a rectifying unit converting an AC input signal into a DC signal, a transformer unit transforming a size of the input signal, which has been converted into the DC signal, into a predetermined size, a wireless power transmission unit receiving the signal transformed by the transformer unit to wirelessly transmit power, and a wired power supply unit receiving the signal transformed by the transformer unit to supply power through a cable. The advantages and disadvantages of the wired power transmission apparatus and the wireless power transmission apparatus are supplemented to each other, so that the power conversion efficiency and the versatility are improved.

Wired-wireless combined power transmission apparatus and the method using the same

There is provided a power converter integrated with an auxiliary converter. The power converter includes: a flyback converter converting an input power of a power supply input terminal into a standby power through a primary side circuit connected to the power supply input terminal and a secondary side circuit magnetically coupled to the primary side circuit to supply the standby power; and a main converter converting the input power of the power supply input terminal into a main power to supply the main power, and converting the input power of the power supply input terminal into the standby power through the secondary side circuit of the flyback converter to supply the standby power, whereby the efficiency of the power converter may be improved.

Power converter integrated with flyback converter

A direct current to direct current converter includes: an input terminal; an output terminal having voltage higher than the input terminal; a coupled inductor boost cell including a coupled inductor connected to the input terminal, a switch connected to the coupled inductor, and an output diode connected to the output terminal; and a clamp and energy transfer cell including a clamp diode connected to the coupled inductor, a clamp capacitor connected to the clamp diode, and an energy transfer diode connected to the output diode.

DC-DC converter and light emitting diode driving device including the same

There is provided a power supply unit supplying a standby power by sharing a switch of a main converter. The power supply unit includes: a main converter, and a standby converter. The main converter controls a current flowing in a primary side winding of a main transformer and supplies a main power through a secondary side winding of the main transformer. The standby converter controls a current flowing in a primary side winding of a standby transformer and supplies a standby power through a secondary side winding of the standby transformer, and a portion of a plurality of switches of the main converter is included in switches of the standby converter.

Power supply unit supplying standby power by sharing switch of main converter

An embodiment provides an inverter transformer comprising: a first bobbin around which a first coil is wound, the first bobbin comprising a first through hole; a second bobbin around which a second coil is wound, the second bobbin comprising a second through hole; a spacer between the first and the second bobbins; and a core inserted into the first and the second through holes.

Inverter transformer

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Daejeon, South Korea

Shin Young Cho