Patent
1980-05-19
1983-09-20
Corbin, John K.
350337, 350349, G02F 113
Patent
active
044052103
ABSTRACT:
A display device for displaying bright images on a dark background, which device includes a liquid crystal cell having a liquid crystal layer with switchable zones between at least two optical states, a light trap in the form of a body exhibiting fluorescent particles and having light emergent windows disposed behind each of the switchable zones in the direction of observation, characterized with the liquid crystal layer containing at least one pleochroic dye. The dye in the liquid crystal layer acting by itself or in conjunction with a polarizer can block passage of the fluorescent light during one optical state of the layer and enable passage of the light during the other state.
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Castellano, J. A. "Liquid Crystals for Electro-Optical Application," RCA Review, vol. 33, (Mar. 1972) pp. 296-310.
Baur Guenter
Greubel Waldemar
Krueger Hans
Schauer Alois
Corbin John K.
Gallivan Richard F.
Siemens Aktiengesellschaft
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