10.4: High Image‐Content Zenithal Bistable Devices

Abstract

Grating aligned zenithal bistable LCDs offer a low cost route to ultra‐low power displays with excellent appearance. The flexibility of the grating design and embossing fabrication method allows each pixel to have several latching thresholds without extra fabrication cost. Combining this approach with a novel addressing method allows each row driver to address several lines of information. For example, this technique allows high numbers of greys to be addressed using digitally weighted spatial dither, but without the extra‐cost of additional electronic drivers.

51.2: Novel Geometries of the Zenithal Bistable Device

“…The gratings were designed to give lower latching voltages (at a given pulse duration) on one surface than the other for both bistable transitions. Independent latching of both surfaces is ensured by latching the higher voltage surface first [9]. With two-stage addressing sequences, a HAN state is induced by the first pulse |V1|, and then a smaller pulse of opposite sign |V2| can selectively…”