Patent ID: 9541780
Date: 2017-01-10
CPC Classifications: G02B,G02F

Claim:
1. A curved surface backlight unit comprising: a light source; a curved surface light guide plate disposed parallel to the light source; first patterns on one surface of the light guide plate; a reflection plate disposed under the light guide plate; optical sheets disposed on the light guide plate; and second patterns formed on one surface of at least one of the optical sheets, wherein the light guide plate is defined into a central area and side areas, the first patterns are more densely formed in the central area rather than the side areas, and the second patterns are arranged in such a manner that brightness in side areas of the optical sheet corresponding to the side areas of the light guide plate becomes about 70%˜90% compared to that in a central area of the optical sheet corresponding to the central area of the light guide plate.