Laser addressed smectic displays

Details Laser addressed smectic displays Laser addressed smectic displays

1985-07-10

1987-10-20

Corbin, John K.

350350S, G02F 1137

Patent

active

047010290

ABSTRACT:
A laser beam addressed smectic display in which the laser beam is used to write clear tracks in an optically scattering field employs an anisotropic conductivity dopant in the liquid crystal filling so that the cell can be electrically set into the scattering state by means of dynamic scattering effects. This requires the use of a laser light absorbing dye that is not only photochemically stable, but also stable against the effects of the relatively high fields and currents present when the cell is being set into the scattering state.

REFERENCES:
patent: 3796999 (1974-03-01), Kahn
patent: 4040047 (1977-08-01), Hareng et al.
patent: 4419664 (1983-12-01), Crossland et al.
patent: 4507221 (1985-03-01), Imazeki et al.
Sasaki et al, "Laser-Addressed Smectic-Cholesteric Light valve Doped with Dichroic Dye", Proceedings of the Sid, vol. 25, No. 2, 1984, pp. 95-98.
Kahn, F. J., "IR-Laser-Addressed Thermo-Optic Smectic Liquid-Crystal Storage Displays," Applied Physics Letters, vol. 22, No. 3, Feb. 1, 1973, pp. 111-113.
Lu, et al, "Thermally and Electrically Addressed Dye Switching LCDs," Mol. Cryst. Liq. Cryst., vol. 94, 1983, pp. 167-189.
Armitage, "Numerical Solution of Heat Flow in the Laser Addressed Liquid-Crystal Display," J. Appl. Phys, vol. 52, No. 7, Jul., 1981, pp. 4843-4851.
C. J. Walker and W. A. Crossland, "Smectic Dynamic Scattering in Laser-Addressed Liquid Crystal Projection Displays", Displays, Oct. 1985, pp. 207-211.

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