<p>Optical stacks including a grating structure that generates diffraction in two in-plane dimensions. The optical stacks may include two gratings, which may be one-directional or two-directional. The optical stacks are suitable for reducing sparkle in displays.</p>
SITTER, BRETT J.;RADCLIFFE, MARC D.;HOFFEND, JR., THOMAS R;HENNEN, DANIEL W.;STEINER, MICHAEL L.;LIU, LAN H.;GOLLIER, JACQUES;WEST, JAMES ANDREW;KOSIK-WILLIAMS, ELLEN MARIE
