The present invention provides a light pipe for a direct-type backlight
having an upper surface and a lower surface, which has: a light
reflecting member provided on the upper surface; and plural light
scattering members formed concentrically on at least one surface selected
from the upper surface and the lower surface, wherein each of the plural
light scattering members is a circular groove or a circular projection,
wherein each area between respective light scattering members is
substantially the same.