Patent ID: 7841749
Filing Date: 2010-11-30
Classification: G02B,G02F

Abstract:
1. An optical member comprising a surface including a first group including a plurality of consecutively disposed lens-shaped portions, the lens-shaped portions diffusing light incident to the optical member directly from a light source, the diffused light of the lens-shaped portions traveling through the lens-shaped portions and away from the optical member, each lens-shaped portion comprising a column shape including a semi-circular curved upper surface; and a second group including at least one prism-shaped portion diffusing the light incident to the optical member directly from the light source, the diffused light of the prism-shaped portion traveling through the prism-shaped portion and away from the optical member, wherein the first group and the second group are alternately disposed on the surface, and wherein a number ratio of the prism-shaped portion and the lens-shaped portions is 1:2, and the prism-shaped portion and the lens-shaped portions have a substantially same height.