Liquid crystal display device having two metastable states and d

Details Liquid crystal display device having two metastable states and d Liquid crystal display device having two metastable states and d

1996-06-14

1999-05-04

Saras, Steven J.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 94, 345 95, 349128, 349179, G09G 336

Patent

active

059008520

ABSTRACT:
A high speed multiplex-driven liquid crystal display device is capable of utilizing a bistable nematic liquid crystal medium while maintaining high contrast, fast switching capability and a wide viewing angle. The chiral nematic liquid crystal medium has a twisted structure wherein a first voltage waveform applied in a first time period brings on Frederick's transition followed by a selected second voltage waveform applied in a second time period capable of generating one of two selectable metastable states representing switchable bistable states.

REFERENCES:
patent: 3837730 (1974-09-01), Hatfield et al.
patent: 4239345 (1980-12-01), Berreman et al.
patent: 4333708 (1982-06-01), Boyd et al.
patent: 4411496 (1983-10-01), Nonomura et al.
patent: 4505548 (1985-03-01), Berreman et al.
patent: 4529271 (1985-07-01), Berreman et al.
patent: 4566758 (1986-01-01), Bos
patent: 4582396 (1986-04-01), Bos et al.
patent: 4601542 (1986-07-01), Meyer
patent: 4601543 (1986-07-01), Boyd et al.
patent: 4601544 (1986-07-01), Cheng et al.
patent: 4717243 (1988-01-01), Boyd et al.
patent: 4770500 (1988-09-01), Kalmanash et al.
patent: 5095376 (1992-03-01), Umeda et al.
patent: 5189535 (1993-02-01), Mochizuki et al.
patent: 5287205 (1994-02-01), Yamazaki et al.
patent: 5488499 (1996-01-01), Tanaka et al.
M. Schadt and W. Helfrich entitled, "Voltage-Dependent Optical Activity of A Twisted Nematic Liquid Crystal", Applied Physics Letters, vol. 18(4), pp. 127-128 (1971).
T.J. Scheffer and J. Nehring "A New, Highly Multiplexable Liquid Crystal Display", Applied Physics Letters, vol. 45(10), pp. 1021-1023 (Nov. 15, 1984).
Robert B. Meyer and R. N. Thurston, "Discovery of DC Switching of a Bistable Boundary layer Liquid Crystal Display", Applied Physics Letters, vol. 43(4), pp. 342-344, (Aug. 15, 1983).
"Numerical modelling of twisted nematic devices"; D.W. Berreman, Bell Laboratories, New Jersey; Phil. Trans. R. Soc. Lond. A, pp. 203-216, 1983.

Affiliated with

Also associated with

Rating

Liquid crystal display device having two metastable states and d does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid crystal display device having two metastable states and d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display device having two metastable states and d will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1872624