eMagin Corporation
Method and Apparatus for Direct Patterning of High-Resolution OLED Microdisplays

Abstract:

OLED-based displays that include pixel arrays having non-uniform sub-pixel arrangements are presented. The non-uniformity of the sub-pixel arrangements enable the pattern of light-emitting material for each sub-pixel color to be deposited through a structurally robust, high-resolution shadow mask in a single deposition. Sub-pixel arrangements in accordance with the present disclosure have larger separations between adjacent features and, therefore, shadow masks suitable for use in forming an entire same-color sub-pixel pattern have apertures that are separated by more structural material. As a result, such shadow masks have greater structural integrity than shadow masks known in the prior art. The teachings of the present disclosure are particularly well suited for the fabrication of full-color, high-resolution, side-by-side-type OLED displays that have a pixel pitch of 20 microns or less.