Dichroic dye containing polymer-dispersed liquid crystal films

John L. West; Renate Ondris-Crawford; Meg A. Erdmann

doi:10.1117/12.19929

1 April 1990 Dichroic dye containing polymer-dispersed liquid crystal films

John L. West, Renate Ondris-Crawford, Meg A. Erdmann

Proceedings Volume 1257, Liquid Crystal Displays and Applications; (1990) https://doi.org/10.1117/12.19929
Event: Electronic Imaging: Advanced Devices and Systems, 1990, Santa Clara, CA, United States

Abstract

Polymer dispersed liquid crystal (PDLC) devices modulate light through electrically controlled light scattering. Colored PDLCs are formed by incorporation ofdichroic dyes. The efficiency ofthe dichroic dye, PDLC films depend on the scattering efficiency of the films, the dichroic ratio of the dichroic dye, the order parameter ofthe dichroic dye in the liquid crystal used, and the fraction ofdye dissolved in the liquid crystal droplets. The efficiency of these films can be measured using a UV/visible spectrometer. Incorporation of dichroic dye in the PDLC film increases the refractive indices of the liquid crystal droplet affecting the scattering efficiency ofthe PDLC film.

Citation Download Citation

John L. West, Renate Ondris-Crawford, and Meg A. Erdmann "Dichroic dye containing polymer-dispersed liquid crystal films", Proc. SPIE 1257, Liquid Crystal Displays and Applications, (1 April 1990); https://doi.org/10.1117/12.19929

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