Abstract: An embodiment voltage converter includes a DC-DC converter and a controller. The DC-DC converter includes a transformer, a main switch connected to an input terminal and the transformer, and first and second synchronous rectification switches connected to an output terminal and the transformer, and the controller is configured to switch the main switch so that the DC-DC converter adjusts a voltage of the input terminal and outputs the voltage to the output terminal and to complementarily switch the first and second synchronous rectification switches without dead time.

Abstract: An embodiment vehicle includes a DC/DC converter having a first power terminal connected to a first electrode of a first battery, a second power terminal connected to a first electrode of a second battery, and a load terminal connected to a first end of an electric load, and including a switching circuit, a transformer, and a rectifier circuit, and a controller configured to set an operation mode of the DC/DC converter to a low-voltage DC/DC converter (LDC) mode or a state-of-charge (SOC) balancing mode, wherein the DC/DC converter is configured to step down a voltage of the first power terminal through the switching circuit, the transformer, and the rectifier circuit and output the voltage to the load terminal when the LDC mode is performed and to control power transfer between the first and second power terminals through the switching circuit when the SOC balancing mode is performed.

Abstract: A planar transformer and a converter including the same include a first core unit including a first receiving portion extending in a first direction; a second core unit spaced from the first core unit, disposed in parallel with the first core unit in a second direction thereof, and including a second receiving portion extending in the first direction; a first coil unit including a first through hole formed in a center portion thereof and a first coil pattern passing through the first receiving portion and the second receiving portion around the first through hole to form a turn; and a second coil unit including a second through hole formed in a center portion thereof and aligned with the first through hole in a third direction thereof, and a second coil pattern passing through the first receiving portion and the second receiving portion around the second through hole.

Abstract: A display apparatus including a main body, a display panel installed in the main body, a video call unit installed to the main body, a circuit board for control of the video call unit, and a cable to connect the video call unit and the circuit board to each other, is provided. Installing the video call unit to the main body enables a video call via the display apparatus.

Abstract: The present invention relates to a malfunction preventing device and a method thereof, which ignores an input signal produced by electricity capacity variation because of moisture to prevent a malfunction of a refrigerator. A malfunction preventing device for a refrigerator includes an inputting part in which a static electricity switch is provided to produce an input signal, and a controlling part that ignores a first input signal inputted in a wait mode, wherein there is no inputted signal from the inputting part for a predetermined delaying time period in the wait mode. A method for preventing a malfunction of a refrigerator includes performing a wait mode in that there is no input signal produced by static electricity for a predetermined delay time period, and ignoring a first input signal inputted in the wait mode.

Abstract: The present invention relates to a refrigerant valve control device and a control method thereof, which adjusts eccentricity of a refrigerant valve during an operation of a refrigerator to prevent overcooling. A refrigerant valve control device of a refrigerator includes a temperature sensing part that senses temperature inside the refrigerator; a refrigerant valve that selectively opens and closes a refrigerant path; and a controlling part that controls the refrigerant valve based on temperature differences between the sensed temperature inside the refrigerator and a predetermined control temperature. In another aspect of the present invention, a control method of a refrigerant valve for a refrigerator includes determining whether refrigerant is leaked at a refrigerant valve based on temperature differences between the temperature inside the refrigerator and a predetermined control temperature; and controlling the refrigerant valve based on the result of the determination.