BACKLIGHT UNIT AND DISPLAY SYSTEM EMPLOYING THE SAME

摘要

PURPOSE: A backlight unit and a display device using the same are provided to accurately control an optical pattern. CONSTITUTION: A liquid crystal panel(1) electrically controls a liquid crystal grating. The liquid crystal panel forms a desired optical pattern by light incident from a light source. The liquid crystal panel comprises a first substrate(60), a second substrate(10), a liquid crystal layer(30), and a transparent film(40). The transparent film has a refractive index. The refractive index corresponds to at least one of a normal refractive index and an abnormal refractive index of a liquid crystal of the liquid crystal layer.