Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1991-11-01
1993-03-23
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 94, G02F 11335, G02F 1137
Patent
active
051969530
ABSTRACT:
A liquid crystal display includes a polarizer layer, an analyzer layer, a liquid crystal layer disposed between the polarizer layer and the analyzer layer, a first electrode proximate to a first major surface of the liquid crystal layer, and a second electrode proximate to a second major surface of the liquid crystal layer. The first and second electrodes are adapted to apply a voltage across the liquid crystal layer when the electrodes are connected to a source of electrical potential. A multilayer thin film compensator is disposed between the polarizer layer and the analyzer layer, the multilayer compensator including a first plurality of layers, each having a first refractive index and a first thickness, alternating with a second plurality of layers, each having a second refractive index and a second thickness. The values of the first and second refractive indices and thicknesses are such that the phase retardation of the multilayer is equal in magnitude but opposite in sign to the phase retardation of the liquid crystal layer in its homeotropically aligned state over a predetermined range of viewing angles.
REFERENCES:
patent: 4385806 (1983-05-01), Fergason
patent: 4505546 (1985-03-01), Umeda et al.
patent: 4701028 (1987-10-01), Clerc et al.
patent: 4759612 (1988-07-01), Nakatsuka et al.
patent: 4844569 (1989-07-01), Wada et al.
patent: 4889412 (1989-12-01), Clerc et al.
patent: 4904058 (1990-02-01), Kato et al.
patent: 4909606 (1990-03-01), Wada et al.
patent: 4936654 (1990-06-01), Suzaki et al.
patent: 4973137 (1990-11-01), Kozaki
patent: 4984872 (1991-01-01), Vick
patent: 4995704 (1991-02-01), Yamamoto et al.
patent: 5016988 (1991-05-01), Iimura
patent: 5032008 (1991-07-01), Yamamoto et al.
patent: 5124824 (1992-06-01), Kozaki et al.
Gooch, et al., "The Optical Properties of Twisted Nematic Liquid Crystal Structures with Twist Angles.ltoreq.90.degree.", Journal of Physics D, vol. 8, p. 1575 (1975).
Grinberg, et al., "Transmission Characteristics of a Twisted Nematic Liquid--Crystal Layer", Journal of the Optical Society of America, vol. 66, p. 1003 (Oct. 1976).
Kahn, "The Molecular Physics of Liquid-Crystal Devices", Physics Today, p. 68 (May 1982).
Penz, "Viewing Characteristics of the Twisted Nematic Display", Proceeding of the S.I.D, vol. 19, No. 2, p. 43 (1978).
Eblen, Jr. John P.
Gunning William J.
Khoshnevisan Mohsen
Yeh Pochi A.
Deinken John J.
Gross Anita Pellman
Rockwell International Corporation
Sikes William L.
LandOfFree
Compensator for liquid crystal display, having two types of laye does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compensator for liquid crystal display, having two types of laye, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensator for liquid crystal display, having two types of laye will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1356464