Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1989-12-26
1992-04-21
Hille, Rolf
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 53, 359 62, 359 63, 359 94, G02F 113
Patent
active
051073560
ABSTRACT:
A liquid crystal display device includes an entrance polarizer to provide light which is linearly polarized in a first selected direction and a first birefringent film to convert the linearly polarized light from the entrance polarizer to elliptically polarized light having a selected ellipticity. At least one liquid crystal cell having an ellipticity equal to the selected ellipticity receives the light propagating from the first birefringent film; the liquid crystal cell includes first and second parallel-facing transparent plates which sealably contain a quantity of liquid crystal material. The liquid crystal material comprises at least a first molecule immediately adjacent the first transparent plate which is oriented in the first selected direction and at least a second molecule immediately adjacent the second transparent plate which is oriented in a second selected direction. A second birefringent film converts the elliptically polarized light propagating from the at least one liquid crystal cell to light which is linearly polarized in the second selected direction. An exit polarized having a polarization axis oriented orthogonally to the second selected direction will extinguish the light propagating from the second birefringent film when the liquid crystal cell is in an "off" state.
REFERENCES:
patent: 4398805 (1983-08-01), Cole
patent: 4492433 (1985-01-01), Imaya et al.
patent: 4852976 (1989-08-01), Suzuki
patent: 4909606 (1990-03-01), Wada et al.
patent: 4984874 (1991-01-01), Yamamoto et al.
patent: 4985285 (1991-01-01), Ichikawa et al.
patent: 5033825 (1991-07-01), Ishikawa et al.
"Rear-Projection TV Using High-Resolution a-Si TFT-LCD", Ikunori Kobayashi, et al. SID Digest, 1989, pp. 114-117.
"A Color STN Display with Two Retardation Compensating Films", Ohgawara, et al. SID Digest, 1989, pp. 390-393.
"Multicolor Super-Twisted Nematic LCD Using Polymer Retardation FIlm", Koukichi Ito, et al. SID Digest, 1989, pp. 394-397.
"Black and White STN-LCD Using Two Birefrigent Films", K. Kumagawa, et al. Japan Display, 1989, pp. 312-315.
"Wide Viewing Angle LCD Using Retardation Films", N. Yamagishi, et al. Japan Display, 1989, pp. 316-319.
"Optimization of Electro-Optical Properties in Achromatic Supertwisted Nematic LCD Using Birefrigent Film", I. Fukuda, et al., Japan Display, 1989, pp. 324-327.
"On the Viewing Angle Dependence of Monochrome-ST LCD Using Retardation Films", R. Watanabe, et al., Japan Display, 1989, pp. 328-331.
"Optimization of a Single-Cell Black & White ST LCD Using a Retardation Film", Japan Display, 1989, pp. 332-335.
"Film Compensated STN-LCDs with Wide Viewing Angle", M. Akatsuka, et al., Japan Display, 1989, pp. 336-339.
"Achromatic Supertwisted Nematic LCD Using Birefrigent Film", Ichiro Fukuda, et al., 1988 International Display Research COnference, pp. 159-160.
"A Single-Cell High-Quality Black & White ST LCD", Shoichi Matsumoto, et al., 1988 International Display Research Conference, pp. 182-183.
"Optical Compensation of Super Twisted Nematic LCD Applied by Polymer Retardation Film", Hiroaki Odai, et al., 1988 International Display Research Conference, pp. 195-198.
Davis Jr. James C.
General Electric Company
Hille Rolf
Ingraham Donald S.
Snyder Marvin
LandOfFree
Liquid crystal display device with birefringent films 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 with birefringent films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display device with birefringent films will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1591758