Patent ID: 8502767

Claim:
A display apparatus having a display unit and a backlight comprising a plurality of light emitting diodes (LEDs) that illuminates the display unit, the display apparatus comprising: a power supply; a current detector which detects a value of a current flowing in an LED of the plurality of LEDs; a current adjusting unit which compares a target current value which is supplied to the LED of the plurality of LEDs with a current value detected by the current detector and controls the value of the current flowing in the LED of the plurality of LEDs; and a controller which determines the target current value based on grayscale information of a video signal which is displayed on the display unit, provides a virtual target current value instead of the target current value to the current adjusting unit for a first time period, wherein the virtual target current value is higher than the target current value, and provides the target current value to the current adjusting unit for a second time period which is from an end of the first time period to a time that the value of the current flowing in the LED arrives at the target current value, wherein an increasing rate of the value of a current flowing in the LED for the first time period is larger than an increasing rate for the second time period.