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Proceedings Paper

Gel-glass dispersed liquid crystal projection display
Author(s): David Levy; Xabier Quintana; Covadonga Rodrigo; Jose Manuel Oton
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Paper Abstract

Liquid crystal microdroplets trapped into silica gel glasses by sol-gel processes may be used for display applications. Gel-glass dispersed liquid crystals (GDLC) are switched between opaque and transparent states by applying external ac-voltage signals; no polarizers are required. Contrast ratio is enhanced in the projection mode as scattering from liquid crystal microdroplets is increased. Color emissive projection displays may be obtained by placing fluorescent RGB masks on the back plane; a UV lamp over the front plane excites the chromophors located under switched pixels, whereas unswitched pixels scatter the incoming UV light and the residual fluorescence. This setup takes advantage of the photostability of sol- gel glasses as compared to similar systems such as polymer-dispersed liquid crystals (PDLCs).

Paper Details

Date Published: 13 October 1994
PDF: 7 pages
Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); doi: 10.1117/12.188988
Show Author Affiliations
David Levy, Instituto de Ciencia de Materiales/CSIC (Spain)
Xabier Quintana, ETSI Telecomunicacion (Spain)
Covadonga Rodrigo, ETSI Telecomunicacion (Spain)
Jose Manuel Oton, ETSI Telecomunicacion (Spain)

Published in SPIE Proceedings Vol. 2288:
Sol-Gel Optics III
John D. Mackenzie, Editor(s)

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