Optics: image projectors – Miscellaneous
Patent
1993-10-19
1995-04-04
Cuchlinski, Jr., William A.
Optics: image projectors
Miscellaneous
359 55, G02F 113
Patent
active
054041856
ABSTRACT:
Disclosed is a liquid crystal display unit comprising liquid twisted nematic liquid crystal material sandwiched between two polarizers. Transparent electrodes are provided on each side of the layer of liquid crystal for locally energizing liquid crystal material in the vicinity of two energized transparent electrodes. Polarized light passing through one polarizer is twisted or not twisted depending upon the energization state of the liquid crystal material and depending upon the second polarizer orientation does or does not pass therethrough. Accordingly, depending upon energization locations, images are formed which can be projected upon a screen. In preferred embodiments the liquid crystal display unit is used in conjunction with a cabinet to provide a low stress work station. A further embodiment includes a folded optical path in combination with the liquid crystal display so as to provide a compact projector. When operating in conjunction with an overhead projector, a preferred embodiment of the present invention is powered by light energy from the overhead projector and in a further preferred embodiment is controlled through the use of infrared or other non-visible electromagnetic communication.
REFERENCES:
patent: 1342894 (1920-06-01), Bugbee
patent: 1385162 (1921-07-01), Tillyer
patent: 1434268 (1922-10-01), Tillyer
patent: 1462348 (1923-07-01), Lyons
patent: 1518403 (1924-12-01), Frederick et al.
patent: 1592393 (1926-07-01), Sulzberger
patent: 1620338 (1927-03-01), Frederick
patent: 1666047 (1928-04-01), Jones et al.
patent: 2108054 (1938-02-01), Eitzen
patent: 2187803 (1940-01-01), Griffin
patent: 2258014 (1941-10-01), Kallusch
patent: 2283268 (1942-05-01), Kreinin
patent: 2395561 (1946-02-01), Osterberg et al.
patent: 2464887 (1949-03-01), Osterberg et al.
patent: 2552184 (1951-05-01), Koch
patent: 2552185 (1951-05-01), Koch
patent: 2569918 (1951-10-01), Berggren
patent: 2660925 (1953-12-01), Turner
patent: 2668478 (1954-02-01), Schroder
patent: 2688271 (1954-09-01), Gretener
patent: 2700323 (1955-01-01), Schroder
patent: 2742819 (1956-04-01), Koch et al.
patent: 2813802 (1957-11-01), Ingle et al.
patent: 2852980 (1958-09-01), Schroder
patent: 2883291 (1959-04-01), Fraser
patent: 3113033 (1963-12-01), Hoxie et al.
patent: 3174067 (1965-03-01), Bahrs
patent: 3217596 (1965-11-01), Murray et al.
patent: 3250175 (1966-05-01), Braun
patent: 3253504 (1966-05-01), Vollmer
patent: 3255342 (1966-06-01), Seitz et al.
patent: 3293982 (1966-12-01), Appeldorn
patent: 3325666 (1967-06-01), Bird et al.
patent: 3482911 (1969-12-01), Noble
patent: 3499112 (1970-03-01), Heilmeier et al.
patent: 3499702 (1970-03-01), Goldmacher et al.
patent: 3514198 (1970-05-01), Schacht et al.
patent: 3536391 (1970-10-01), Anderson et al.
patent: 3574444 (1971-04-01), Hipp, Jr.
patent: 3575452 (1971-04-01), Blomgren
patent: 3575499 (1971-04-01), Mahoney, Jr.
patent: 3586851 (1971-06-01), Rudolph
patent: 3761172 (1973-09-01), Letzer
patent: 3807850 (1974-04-01), Oxeki
patent: 3824003 (1974-07-01), Koda et al.
patent: 3836243 (1974-09-01), Melchior
patent: 3844650 (1974-10-01), Nicholson et al.
patent: 3862360 (1975-01-01), Dill et al.
patent: 3895866 (1975-07-01), Quervain et al.
patent: 3944320 (1976-03-01), McLintie
patent: 3979160 (1976-09-01), Anderson et al.
patent: 3980403 (1976-09-01), Pollack
patent: 4060316 (1977-11-01), Pollack et al.
patent: 4080052 (1978-03-01), Levin et al.
patent: 4088400 (1978-05-01), Asouline et al.
patent: 4095881 (1978-06-01), Maddox
patent: 4154007 (1979-05-01), Judd
patent: 4165160 (1979-08-01), Persha et al.
patent: 4171874 (1979-10-01), Bigelow et al.
patent: 4185895 (1980-01-01), Stephens et al.
patent: 4194833 (1980-03-01), Lester et al.
patent: 4195915 (1980-04-01), Lichty et al.
patent: 4222641 (1980-09-01), Stolov
patent: 4239349 (1980-12-01), Scheffer
patent: 4275395 (1981-06-01), Dewey et al.
patent: 4294524 (1981-10-01), Stolov
patent: 4315258 (1982-02-01), McKnight et al.
patent: 4338006 (1982-07-01), Ozeki
patent: 4349817 (1982-09-01), Hoffman et al.
patent: 4365869 (1982-12-01), Hareng et al.
patent: 4368963 (1983-01-01), Stolov
patent: 4372639 (1983-02-01), Johnson
patent: 4386826 (1983-06-01), Stolov
patent: 4386836 (1983-06-01), Aoki et al.
patent: 4403216 (1983-09-01), Yokoi
patent: 4409583 (1983-10-01), Dahan et al.
patent: 4420234 (1983-12-01), Dolejsi et al.
patent: 4423927 (1984-01-01), Bly
patent: 4453810 (1984-06-01), Curiel
patent: 4507547 (1985-03-01), Taga et al.
patent: 4514042 (1985-04-01), Nukii et al.
patent: 4526441 (1985-07-01), Dowden et al.
patent: 4536014 (1985-08-01), Boutaleb et al.
patent: 4564276 (1986-01-01), Hofmann et al.
patent: 4577959 (1986-03-01), Yazaki
patent: 4613207 (1986-09-01), Fergason
patent: 4652101 (1987-03-01), Grunwald
patent: 4660936 (1987-04-01), Nosker
patent: 4664482 (1987-05-01), Kando et al.
patent: 4671634 (1987-06-01), Kizaki et al.
patent: 4687301 (1987-08-01), Ledebuhr
patent: 4704004 (1987-11-01), Noske
patent: 4722593 (1988-02-01), Shimazaki
patent: 4726662 (1988-02-01), Cromack
patent: 4756604 (1988-07-01), Nakatsuka et al.
patent: 4763993 (1988-08-01), Vogeley et al.
patent: 4765718 (1988-08-01), Henkes
patent: 4765734 (1988-08-01), Trac et al.
patent: 4770525 (1988-09-01), Umeda et al.
patent: 4779510 (1988-10-01), Van den Abbeel
patent: 4787737 (1988-11-01), Ogawa et al.
patent: 4812034 (1989-03-01), Mochizuki et al.
patent: 4824210 (1989-04-01), Shimazaki
patent: 4846694 (1989-07-01), Erhardt
patent: 4864390 (1989-09-01), McKechnie et al.
patent: 4880303 (1989-11-01), Grunwald
patent: 4881110 (1989-11-01), Braatz et al.
patent: 4882599 (1989-11-01), Grunwald
patent: 4941732 (1990-07-01), Umeda et al.
patent: 4944578 (1990-07-01), Denison
patent: 4953971 (1990-09-01), Highfill
patent: 4976536 (1990-12-01), Vogeley et al.
patent: 5048949 (1991-09-01), Sato et al.
"The Journal of the Institute of Television Engineers of Japan" 1984, vol. 38.
SPIE vol. 250, 1980, "Liquid Crystal Light Projector, etc. " R. S. Gold, pp. 59-68, Optomechanical Systems Design (1980).
IEEE Trans On Elec. Devices, vol. ED-17, No. 5, 5/70, Design of an Electrooptic Light Valve Projection Display, T. H. Moore.
Apparatus for Teaching Physics, W. C. Connolly, Depart. of Physics, Appalachian State University, Boone, N. C., Sep. 1985, pp. 382-383.
Article in PC Week, Feb. 11, 1986, VIP Device alleged to have been shown in Mar. 1986 & alleged to have been offered for sale before Apr. 1986 and alleged to have been used in public on Apr., 1986.
VIP Device photographs alleged to have been made by Chisholm, 910 Campise Way, Suite 2C, Campbell, Calif. 95008.
PC Presenter Series, "Built-In and Add-On LCD's for Creating Large Screen Graphic Presentations with your Personal Computer", Apollo Disclosure.
Vogeley Arthur W.
Vogeley James H.
Cuchlinski Jr. William A.
Dowling William C.
n-View Corporation
LandOfFree
Liquid crystal display for projection systems 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 for projection systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display for projection systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2383042