Patent ID: 8836209

Claim:
A display apparatus comprising: a backlight unit which generates first light and second light including first and second blue light, first and second green light and first and second red light, respectively; and a display panel which receives the first and second light to display an image, wherein the backlight unit comprises: a light emitting diode which generates an ultraviolet ray; a fluorescent substance layer disposed on the light emitting diode, wherein the fluorescent substance layer comprises: a blue fluorescent substance layer which receives the ultraviolet ray and emits blue light; a green fluorescent substance layer which receives the ultraviolet ray and emits green light; and a red fluorescent substance layer which receives the ultraviolet ray and emits red light; and first and second band-pass filters which receive the blue light, the green light and the red light and output the first and second blue light, the first and second green light and the first and second red light, respectively.