Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Optomind Inc.

Chun-taek Rim

Eun-soo Lee

Jin-Soo Choi

Young-ho Choi

Kyu-sung Lee

Byeong-guk Choi

Sang-min Lim

Bong-cheol Kim

Young-chan Park

Ho-jic Kim

Bo-hwan Choi

The present invention relates to an electronic apparatus and display apparatus, and method for driving the apparatuses, and the display apparatus according to an embodiment of the present invention may comprise: a resonance circuit unit for generating voltage by means of inductive electromotive force generated due to an external apparatus; a rectification unit for rectifying the output voltage of the resonance circuit unit; and a converter for outputting the rectified voltage of the rectification unit as the target voltage by varying duty on the basis of duty data and target voltage determined in accordance with the distance from the external apparatus.

Electronic apparatus and display apparatus, and method for operating apparatuses

Provided are a wireless power transmission device and a wireless power transmission system. The wireless power transmission device, according to one embodiment of the present invention, may comprise: a dipole coil comprising a core, and a conducting wire wound at the center part of the core; a power unit for supplying a current to the conducting wire; and a canceling coil for canceling a magnetic field radiated from a lateral surface of the dipole coil.

Wireless power transmission device and wireless power transmission system

The present disclosure provides an AC-direct-type LED-lighting device including compensation circuit for AC input compensation, including a compensation inductor and first compensation capacitor parallelly connected to one terminal of AC input and a second compensation capacitor connected in series; rectifying unit for rectifying output from second compensation capacitor terminals to obtain direct current; and LED array driven by the rectifying unit output, wherein capacities of the first and second compensation capacitors and the compensation inductor and LED array output voltage are determined to cause 0.9 or larger cosine value of a phase, with respect to the AC input voltage, of resulting current obtained by dividing AC input voltage by sum of (i) parallel value of an equivalent impedance Rof the rectifying unit and LED array and an impedance of the second compensation capacitor and (ii) parallel value of impedances of the compensation inductor and first compensation capacitor.

Parallel-type LED lighting device

Growing community of inventors

Gwangju, South Korea

Chun-taek Rim