Direct-type backlight

摘要

The present invention provides a direct-type backlight having: a resin sealing member (3) including at least one resin layer, which has a light reflecting section (4) formed on the outermost surface of the resin sealing member (3); an optical semiconductor element (2) sealed by the resin sealing member (3); and plural circular light scattering grooves (5) formed concentrically on at least one surface of the resin layer, wherein an area of a circle in the center and an area among the respective concentric circles are substantially the same.