Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1989-09-11
1991-10-22
Hille, Rolf
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 77, 359 75, 359 93, 359 94, 359 92, 359102, G02F 113
Patent
active
050589989
ABSTRACT:
A liquid crystal device has a pair of substrates having a plurality of electrodes arranged on facing surfaces thereof, aligning films, rubbed in a predetermined direction, for covering the surfaces of the substrates and the surfaces of the electrodes, a nematic liquid crystal disposed between these aligning films, and a pair of polarizing plates disposed outside the substrates. The liquid crystal device has an optical anistropy .DELTA.n of 0.12 or below, a dielectric ratio .DELTA..epsilon./.epsilon.1 of 1.0 or below, expressed by a ratio of a dielectric anistotropy .DELTA..epsilon. of a dielectric constant in a direction normal to the axes of liquid crystal molecules, and a retardation .DELTA.n.multidot.d of greater than 0.4 .mu.m and less than 1.0 .mu.m, which is expressed by a product of the optical anisotropy .DELTA.n and the thickness d of a liquid crystal layer. The nematic liquid crystal is twised 180.degree. to 270.degree. between the aligning films.
REFERENCES:
patent: 4634229 (1987-01-01), Amstutz et al.
patent: 4697884 (1987-10-01), Amstutz et al.
patent: 4759612 (1988-07-01), Nakatsuka et al.
patent: 4799774 (1989-01-01), Baur et al.
patent: 4815825 (1989-03-01), Nakagomi et al.
patent: 4886344 (1989-12-01), Scheuble et al.
patent: 4906073 (1990-03-01), Hunahata et al.
patent: 4909605 (1990-03-01), Asano et al.
patent: 4930877 (1990-06-01), Kano et al.
patent: 4944577 (1990-07-01), Yoshida et al.
The Optical Mode Interference Liquid-Crystal Display: M. Schadt et al., pp. 372-375, SID 87 Digest.
Electro-Optical Performance of a New, Black-White and Highly Multiplexable Liquid Crystal Display, pp. 236-238, M. Schadt et al., Appl. Phys. Lett. 50(5), Feb. 2, 1987.
Matsuda Toshiyuki
Muto Tetsuo
Sugimoto Naoshige
Yoshida Tetsushi
Casio Computer Co. Ltd.
Hille Rolf
Tran Minhloan
LandOfFree
Liquid crystal display devide with a twisted alignment state 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 devide with a twisted alignment state, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display devide with a twisted alignment state will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-104773