Patent ID: 8595964

Claim:
An article having a micro-structured surface, comprising: a substrate having a first surface and a second surface; a pattern of first micro-structures on the first surface; and a pattern of second micro-structures provided on the first surface which forms a background for the first pattern of first micro-structures, wherein at least one of the pattern of first micro-structures and the pattern of second micro-structures comprises prismatic structures, wherein the pattern of first micro-structures represents a two-dimensional indicia that is perceivable as a recognizable two-dimensional pattern in reference to the pattern of second micro-structures as the background, and wherein the pattern of first micro-structures contrast from the background, wherein the first micro-structures and the second micro-structures are aligned along generally a same longitudinal direction, wherein at least some of the first micro-structures are connected end-to-end to respective second micro-structures longitudinally, and wherein the end-to-end connected first micro-structures and second micro-structures define transitions that are perceivable to define a boundary of the two-dimensional indicia represented by the pattern of first micro-structures in reference to the pattern of micro-structures as the background.