Method of controlling an optical characteristic

Details Method of controlling an optical characteristic Method of controlling an optical characteristic

1975-03-03

1977-07-19

Corbin, John K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340336, 340324M, G02F 116

Patent

active

040365530

ABSTRACT:
The invention relates to a method of controlling an optical characteristic of a material and it is concerned also with devices and image-forming means for carrying out the method.
The method of control is particularly advantageous in devices comprising a plurality of points distributed in the form of a matrix. The optical characteristic K of the material is controlled by an energization having a magnitude G for a duration t, the values G and t being so selected as a function of the time response K (G, t) of the characteristic K at an energization stage of magnitude G that K (G.sub.O, t.sub.O) is equal to K.sub.O.

REFERENCES:
lechner et al., "Liquid Crystal Matrix Displays", Proceedings of the IEEE, vol. 59, Nov. 1971, pp. 1566-1579.
Gooch, C. H., Low, J. S., "Matrix--addressed Liquid Crystal Displays", J. Phys. D. Appl. Phys., vol. 5, 1972, pp. 1218-1225.
Kmetz, A. R., "Experimental Comparison of Multiplexing Techniques for LC Displays", 1972, SID International Symposium, June 1972, pp. 66-67.
Soref, R. A. and Rafuse M. J. "Electrically controlled Birefringence of Thin Nematic Films," Jour. of Appl. Phys. No. 143, No. 5, May 1972, pp. 2029-2037.
Kahn, F. J., "Electric-Field-Induced Orientational Deformation . . . .," Appl. Phys. Lett., vol. 20, No. 5, Mar. 1972, pp. 199-201.
Schiekel, M. F., Fahrenshon K., "Deformation of Nematic Liquid Crystal with Vertical . . . .," Appl. Phys. Lett., vol. 19, No. 10, Nov. 15, 1971, pp. 391-393.
Robert, J., Labrunie G., Borel, J. "Imageus de Phase Electro-Optique a Cristaux Liquides Mematiques," 1st European Elctro Optics Markets & Tech. Conf. 1973.

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