Patent ID: 7006293
Filing Date: 2006-02-28
Classification: G02B

Abstract:
1. A high brightness diffuser, comprising: a convex light diffusing piece with ridge-shaped structure arranged on a surface thereof, being consisted of a plurality of large convex ridges and a plurality of small convex ridges, wherein each of the convex ridges has a ridgeline, and the large ridge and small ridge are interlace-arranged, and the plural ridges along with the associated ridgelines are extending toward a same direction; a concave light diffusing piece with ridge-shaped structure arranged on a surface thereof, being consisted of a plurality of concave ridges associated with a ridgeline existing in between two adjacent ridges, wherein the plural ridges along with the associated ridgelines are extending toward a same direction; and wherein, the two light diffusing pieces are stacked up by plastering the surface with ridge-shaped structure of the convex light diffusing piece on the surface without ridge-shaped structure of the concave light diffusing piece, and enabling an included angle to be formed between the two ridge-extending directions of the two light diffusing pieces.