Display apparatus and method for controlling the same

A display apparatus comprising:

• a liquid crystal panel;
• a backlight unit configured to provide light to the liquid crystal panel;
• a quantum dot (QD) sheet between the liquid crystal panel and the backlight unit, and comprising QD particles;
• and
• at least one processor configured to control the liquid crystal panel and the backlight unit,
• wherein the backlight unit comprises:
• a substrate;
• and
• a plurality of light-emitting devices, each of the plurality of light-emitting devices comprising a red light-emitting diode (LED), a green LED, and a blue LED, and
• wherein the at least one processor is further configured to, based on an ON signal of an LED having a color identical to a color of the QD particles of the QD sheet, control the backlight unit to turn on the blue LED and the LED that receives the ON signal, and the LED having the color identical to the color of the QD particles of the QD sheet is one of the red LED and the green LED.