Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

1988-11-23

1991-05-07

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing pleochroic dye

350349, 350350S, 350351, C09K 1900

Patent

active

050134744

ABSTRACT:
A liquid crystal display device of the type in which thermo-writing is performed by means of irradiation of laser beams, the display device including a laser-sensitive liquid crystal composition exhibiting a maximum absorption at or near the wavelength of the impinging laser beam with which the display device is to be used. The specific improvement of the present invention comprises including in the liquid crystal composition at least two types of laser-responsive dyes, each being present in an amount less than its solubility limit in the liquid crystal composition, and each of the dyes evidencing a maximum absorption at or near the wavelength of the laser beam. In an embodiment, the dyes are chosen from the class of squarilium dyes.

REFERENCES:
patent: 4464282 (1984-08-01), Harrison et al.
patent: 4496221 (1985-01-01), Harrison et al.
patent: 4548886 (1985-10-01), Katagiri et al.
patent: 4606613 (1986-08-01), Urabe
Loutfy et al., Photographic Science & Eng., vol. 27, No. 1, pp. 5-9 (1983).
Cox, Mole. Cryst. Liq. Cryst., vol. 55, pp. 1-32 (1979).

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