Patent ID: 9207386
Filing Date: 2015-12-08
Classification: G02B

Abstract:
1. A backlight unit for a display device, comprising: a light guide plate; a reflective sheet under the light guide plate; a light source positioned on at least one side of the light guide plate and providing a light into the light guide plate; and an optical sheet disposed on the light guide plate and including a first lenticular sheet, the first lenticular sheet including a base film having a center portion and an edge portion surrounding the center portion for diffusing the light through the light guide plate, a first lenticular lens disposed on a front surface of the base film and having a half-cylinder shape and a first printing pattern exclusively on at least one edge of a rear surface of the edge portion of the base film, the center portion of the base film being substantially free of the first printing pattern, wherein the first printing pattern has a plurality of sub-patterns that are formed of an ink material, and wherein the plurality of sub-patterns further include first to third sub-patterns, the third sub-pattern is positioned between the first and second sub-patterns, and the third sub-pattern has a size smaller than the first sub-pattern and greater than the second sub-pattern.