Patent ID: 7478913

Claim:
A directly illuminated display unit, comprising: a display panel; one or more light sources disposed behind the display panel and capable of producing illumination light; a diffuser disposed between the one or more light sources and the display panel; and a light diverting layer disposed between the one or more light sources and the diffuser, the light diverting layer comprising light diverting members disposed on a first face of the light diverting layer facing the diffuser, at least one of the light diverting members having a surface with at least one sharp change in slope and having a first side and a second side, the first and second sides of the light diverting members each comprising at least one of a plurality of facets and a curved surface, the first side having a first best fit center of curvature and the second side having a second best fit center of curvature, the positions of the first and second best fit centers of curvature being different.