Display apparatus, power supply apparatus and power supply method to minimize wasteful power consumption

摘要

A display apparatus, a power supply apparatus and a power supply method are provided. The display apparatus display apparatus includes: a signal receiving unit which receives an image signal; a signal processing unit which processes the image signal; a display unit which displays an image based on the image signal processed by the signal processing unit; and a power supply unit which receives AC power and supplies operation power to the display unit. The power supply unit includes a discharging circuit part which includes a discharging element which discharges the power supply unit to remove a residual voltage from the power supply unit when the AC power is suspended, the discharging circuit part preventing the discharging element from consuming power when the AC power is input. It is possible to minimize wasteful power consumption caused by a discharging element provided to guarantee user's safety against a residual voltage.

主权项

1. A display apparatus comprising:
a signal receiving unit which receives an image signal; a signal processing unit which processes the image signal received by the signal receiving unit; a display unit which displays an image based on the image signal processed by the signal processing unit; and a power supply unit which receives AC power and supplies operation power to the display unit, and comprises:
an AC filter part which filters the AC power and comprises a first voltage charging part which is charged with a residual voltage,a rectifier part which rectifies an output current of the AC filter part to supply the operation power from an output voltage of the rectifier part, anda discharging circuit part comprising:
a discharging element which discharges the residual voltage of the AC filter part when the AC power is suspended,a first diode which is provided on a first discharging path and is connected to one side of the first voltage charging part and to the discharging element,a second diode which is provided on a second discharging path and is connected to other side of the first voltage charging part and to the discharging element,a first switching part which regulates a flow of current passing through the discharging element; anda switch control part which controls the first switching part to prevent current from flowing through the discharging element when the AC power is input, wherein the residual voltage discharges through the first discharging path when the AC power is positive and discharges through the second discharging path when the AC power is negative.