Optical sheet for graphic image displays

Abstract

In one embodiment, a graphic image display can comprise: a backlight source; a light transmitting first sheet having a viewing side and a backside, with a plurality of geometric microstructure units on the backside; and a second layer comprising a source of graphic image information. The plurality of geometric microstructure units can be selected from microlenses, polyhedral shapes, lenticular shapes, and combinations comprising at least one of the foregoing. The graphic image display can be suitable for viewing under ambient light from the viewing side alone, under backlighting alone, and in the presence of both ambient light from the viewing side and backlighting.

Dependencies are inferred from the claim text.