Abstract: A wireless power transmitter may comprise: a signal generation unit which generates a differential signal; an amplifier which amplifies the differential signal with a predetermined gain; a resonance unit which generates an electromagnetic wave using the amplified differential signal and radiates the same; and a signal adjustment unit which senses at least one of the current and the voltage of the amplified differential signal at the input terminal of the resonance unit, and adjusts at least one of the phase and the amplitude of the differential signal output from the signal generation unit, on the basis of the result of the sensing.

Abstract: A wireless power transmitter may comprise: a signal generation unit which generates a differential signal; an amplifier which amplifies the differential signal with a predetermined gain; a resonance unit which generates an electromagnetic wave using the amplified differential signal and radiates the same; and a signal adjustment unit which senses at least one of the current and the voltage of the amplified differential signal at the input terminal of the resonance unit, and adjusts at least one of the phase and the amplitude of the differential signal output from the signal generation unit, on the basis of the result of the sensing.

Abstract: A wireless power transmitter and a method for detecting a change in load during wireless charging in the wireless power transmitter is provided. The wireless power transmitter includes a power transmission unit configured to transmit power to a wireless power receiver, a current detection unit configured to measure a voltage value corresponding to a current that is output to the power transmission unit while the power is transmitted from the power transmission unit, and a controller configured to adjust the power transmitted by the power transmission unit based on the measured voltage value.

Abstract: A broadcast receiving apparatus and method for providing a contents recommendation service are provided. The method for providing a contents recommendation service of a broadcast receiving apparatus includes: displaying image contents; searching a plurality of associated contents associated with the image contents, according to a user instruction; aligning the plurality of associated contents based on at least one of image quality information and broadcast time information of the plurality of associated contents; and displaying a contents list for the plurality of associated contents which are aligned. Therefore, the broadcast receiving apparatus may provide various digital broadcast services to a user.

Abstract: A wireless power transmitter and a method for detecting a change in load during wireless charging in the wireless power transmitter is provided. The wireless power transmitter includes a power transmission unit configured to transmit power to a wireless power receiver, a current detection unit configured to measure a voltage value corresponding to a current that is output to the power transmission unit while the power is transmitted from the power transmission unit, and a controller configured to adjust the power transmitted by the power transmission unit based on the measured voltage value.