Multiview backlight, display, and method having optical mask elements

Abstract

A multiview backlight and multiview display employ an optical mask element having a first portion and a laterally displaced second portion to mitigate Moiré associated with the optical mask element. The multiview backlight includes an array of multibeam unit cells distributed across a light guide. Each multibeam unit cell has a multibeam element configured to scatter out a portion of guided light as a plurality of directional light beams having different directions corresponding to different views of the multiview display. Each multibeam unit cell further includes an optical mask element having the first portion aligned and co-extensive with the multibeam element and the second portion laterally displaced within the multibeam unit cell from the first portion. One or both of the lateral displacement and an overall size of the optical mask element is configured to mitigate Moiré associated with the optical mask element.

Dependencies are inferred from the claim text.