26 March 1999 Silicon-based reflective polymer-dispersed LC display for portable low-power applications
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Abstract
Recently LCOS microdisplays are becoming available for personal IT applications, despite some problems which are less critical in poly silicon or amorphous silicon based displays. The most common problems which must be encountered are the polarization of the pixels and the light shielding of the silicon substrate. In this paper a methods proposed which solves the light shielding and pixel flatness problem. A non-critical back-end processing which can be applied outside the silicon foundry has been developed. The effectiveness of the light shielding on a working demonstrator display is shown. To avoid light losses caused by a polarization filter, a polymer dispersed LC has been chosen. By decreasing the cell gap we made the PDLC voltage compatible with a standard 3 micrometers CMOS process and its response fast enough to be used for video applications. It is shown that this choice is very suited in direct view and portable applications. The realized prototype has 3 bit grey levels and is video compatible and can be used in a number of applications, such as personal viewers, PDAs and data displays.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Geert P. S. Van Doorselaer, Geert P. S. Van Doorselaer, Nadine Carchon, Nadine Carchon, Jean Van den Steen, Jean Van den Steen, Dieter Cuypers, Dieter Cuypers, Jan M.A. Vanfleteren, Jan M.A. Vanfleteren, Herbert De Smet, Herbert De Smet, Andre Van Calster, Andre Van Calster, "Silicon-based reflective polymer-dispersed LC display for portable low-power applications", Proc. SPIE 3635, Liquid Crystal Materials, Devices, and Applications VII, (26 March 1999); doi: 10.1117/12.343860; https://doi.org/10.1117/12.343860
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