Method of making liquid crystal material including polymerizing

Details Method of making liquid crystal material including polymerizing Method of making liquid crystal material including polymerizing

1993-05-06

1994-08-02

Gross, Anita P.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 51, G02F 113

Patent

active

053351010

ABSTRACT:
An encapsulated liquid crystal material which comprises a liquid crystal composition dispersed in a containmant medium and is responsive to an applied electric field to transform from a first visual state to a second visual state is made by: (a) providing a liquid crystal composition having an ordinary and an extraordinary refractive index; (b) providing a prepolymer material in which the liquid crystal composition is substantially immiscible and which is polymerizable into a containment medium having a refractive index which is substantially matched with the ordinary refractive index of the liquid crystal composition; (c) forming a dispersion of the liquid crystal composition in the prepolymer material, the dispersion having a mean volume diameter of less than 20 .mu.m; and (d) polymerizing the prepolymer material to form the encapsulated liquid crystal material.

REFERENCES:
patent: 3600060 (1971-08-01), Churchill et al.
patent: 3720623 (1973-03-01), Cartmell et al.
patent: 3872050 (1975-03-01), Benton et al.
patent: 3935337 (1976-01-01), Taylor
patent: 4101207 (1978-07-01), Taylor
patent: 4182700 (1980-01-01), Benton et al.
patent: 4246302 (1981-01-01), Benton et al.
patent: 4435047 (1984-03-01), Fergason
patent: 4616903 (1986-10-01), Fergason
patent: 4671618 (1987-06-01), Wu et al.
patent: 4673255 (1987-06-01), West et al.
patent: 4685771 (1987-08-01), West et al.
patent: 4688900 (1987-08-01), Doane et al.
patent: 4728547 (1988-03-01), Vaz et al.
patent: 4950052 (1990-08-01), Fergason et al.
patent: 4992201 (1991-02-01), Pearlman
patent: 4994204 (1991-02-01), Doane et al.
patent: 5004323 (1991-04-01), West
patent: 5015057 (1991-05-01), Rumbaugh et al.
patent: 5056898 (1991-10-01), Ma et al.
patent: 5138472 (1992-08-01), Jones et al.
patent: 5150232 (1992-09-01), Gunkima et al.
patent: 5233445 (1993-08-01), Kamath et al.
Hirai et al., "Phase diagram and phase separation in LC/prepolymer mixture," SPIE vol. 1257 Liq. Cryst. Disp. and Appl'ns (1990), pp. 2-8.
Vaz et al., SPIE vol. 1455, Liquid Crystal Devices and Materials (1991), pp. 110-121 "Droplet Size Polydispersity in Polymer-Dispersed Liquid Crystal Films".

Affiliated with

Also associated with

Rating

Method of making liquid crystal material including polymerizing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making liquid crystal material including polymerizing , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making liquid crystal material including polymerizing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-68687