Power supply device of video display apparatus and method thereof

A power supply device of a video display apparatus, comprising:

• a rectifier configured to rectify input power;
• a harmonics suppressor configured to shut off higher harmonics of the rectified power;
• a smoothing circuit configured to smooth the power output by the harmonics suppressor;
• a power supplier configured to supply the smoothed power to the video display apparatus as a first power in a first power supply mode or a second power in a second power supply mode;
• and
• a controller configured to control the harmonics suppressor to operate both in the first power supply mode to supply the first power or the second power supply mode to supply the second power.

A power supply device of a video display apparatus, comprising:

• a rectifier configured to rectify input power;
• a smoothing circuit configured to smooth the power output by the rectifier;
• a standby power supplier to supply the smoothed power to the video display apparatus as standby power;
• a main power supplier to supply the smoothed power to the video display apparatus as main power;
• and
• a controller configured to control both in a standby power supply mode to supply the standby power or a main power supply mode to supply the main power.

A power supply method of a video display apparatus, comprising:

• rectifying input power;
• removing higher harmonics included in the rectified power in each of a first power supply mode for supplying power to a video display apparatus and a second power supply mode for supplying power to the video display apparatus;
• smoothing the higher harmonics removed rectified power;
• controlling supply of the smoothed higher harmonics rectified power to the video display apparatus as first power or second power, wherein the controlling bypasses rectified power to a first power supplier by turning off a harmonics suppressor in a first power mode, and wherein the controlling supplies the smoothed and removed higher harmonics by turning on the harmonics suppressor in a second power supply mode.