Patent ID: 8777474
Filing Date: 2014-07-15
Classification: G02B,G02F,Y10T

Abstract:
1. An optical film comprising a base and a plurality of optical patterns having peak and valley portions formed on a surface of the base, wherein pitches of the optical patterns, heights of the peak portions and depths of the valley portions are irregular, and the optical patterns have a non-linear non-symmetrical arrangement structure in which the peak and valley portions are irregularly bent as viewed from top and side; wherein the peak portions of the optical patterns have a defect correction structure thereon, the defect correction structure itself having peak and valley portions which are formed in a height region of less than 30% from an apex of the peak portion and are irregularly bent as viewed from top and side; and wherein adjacent peak portions and valley portions are connected by sloped portions which are devoid of such defect correction structures.