Liquid crystal display device having mixture to suppress changin

Details Liquid crystal display device having mixture to suppress changin Liquid crystal display device having mixture to suppress changin

1998-07-27

2000-11-21

Parker, Kenneth

Liquid crystal cells, elements and systems

With specified nonchemical characteristic of liquid crystal...

Within smectic phase

349115, 349175, C09K 1902, G02F 11335

Patent

active

061510939

ABSTRACT:
A bistable liquid crystal display device includes a liquid crystal material which has a plurality of states, such as a stable state with a twist angle w.sub.0 and first and second metastable states with w.sub.0 180.degree. and w.sub.o -180.degree., respectively, wherein w.sub.0 is a twist angle along a direction of cell thickness of the liquid crystal material at an initial stable state. In order to properly drive the liquid crystal device, a first pulse voltage is applied to induce a transition from the stable state to a homeotropic state for the liquid crystal material, and a second voltage pulse is subsequently applied to relax the liquid crystal material from the homeotropic state selectively to either the first or second metastable state depending on the pulse shape. The liquid crystal material is composed such that a change of unstrained pitch thereof with temperature may suppress the change of switching behaviors with temperature, to thereby improve display characteristics of the liquid crystal device.

REFERENCES:
patent: 4239345 (1980-12-01), Berreman et al.
patent: 4840463 (1989-06-01), Clark et al.
patent: 5624600 (1997-04-01), Takiguchi et al.
patent: 5726460 (1998-03-01), Katagiri et al.
patent: 5731861 (1998-03-01), Hatano et al.
patent: 6072558 (2000-06-01), Tanaka et al.

Affiliated with

Also associated with

Rating

Liquid crystal display device having mixture to suppress changin 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 mixture to suppress changin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display device having mixture to suppress changin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1262947