Display apparatus, power supply apparatus and power supply method thereof

摘要

A display apparatus, a power supply apparatus and a power supply method thereof are provided. The display apparatus includes: a signal processor which processes an image signal; a display unit which displays thereon an image corresponding to the processed image signal; and a power supply unit which receives an input of AC power and supplies operating power to the display unit. The power supply unit includes a discharging circuit unit which discharges a remaining voltage of the power supply unit if the input of the AC power is suspended, and does not discharge the voltage if the AC power is input. Accordingly, a remaining voltage from a power supply unit is effectively removed if an input of AC power is suspended, and power consumption does not occur if the AC power is input.

主权项

1. A display apparatus comprising:
a signal processor which processes an image signal; a display unit which displays an image corresponding to the processed image signal; and a power supply unit which receives an input of alternating current (AC) power and supplies operating power to the display unit; wherein the power supply unit comprises an AC filter, a rectifier and a discharging circuit unit which discharges a remaining voltage of the AC filter if the input of the AC power is suspended, and does not discharge the voltage if the input of the AC power is detected, wherein the AC filter is provided between the AC power and the rectifier, wherein the discharging circuit unit comprises a discharging device which discharges the remaining voltage of the AC filter, and a first switch which controls a current caused by the remaining voltage of the AC filter to flow in the discharging device when the input of the AC power is suspended, and wherein the first switch controls a current not to flow in the discharging device when the input of the AC power is detected.