Backlight unit and display device employing the same

摘要

A backlight unit for increasing the amount of vertical output light, and a displaying apparatus employing the same. The backlight unit includes: a light source; a first collimating unit which collimates light incident from the light source to a first direction and which outputs the collimated light; and a second collimating unit which collimates the light output from the first collimating unit to a second direction that is different from the first direction and which outputs the collimated light, wherein the light from the light source is sequentially collimated to the first and second directions and out the collimated light is output.