Patent ID: 8717519
Filing Date: 2014-05-06
Classification: G02B,G02F

Abstract:
1. An optical film for reducing color shift in a display, the optical film being disposed in front of a display panel of the display, and comprising: a background layer; and a plurality of engraved or embossed lens sections formed on the background layer such that the lens sections are spaced apart from each other, wherein, when light is emitted from the display, the lens sections diffuse a direction in which a portion of the light incident onto the lens sections is emitted, so that the portion of the light is mixed with another portion of the light passing between adjacent ones of the lens sections, wherein a respective cross-sectional profile of the lens sections includes first, second and third sides, the first and second sides facing each other, the third side connecting the first and second sides to each other, and an average curvature of the third side being smaller than that of the first side and than that of the second side; wherein a relationship, 0.5≦1−(a width of the lens section−a width of the third side)/(a pitch of the lens section)≦0.95 is satisfied.