Television – Video display – Projection device
Patent
1993-09-23
1994-08-02
Groody, James J.
Television
Video display
Projection device
348752, 348756, 348757, 353 20, H04N 574, H04N 931
Patent
active
053350227
ABSTRACT:
A front projection video display system achieves high contrast without darkened ambient room conditions by a specific combination and arrangement of the components of this system. These components include a front-projection video projector which projects an image of particular direction of polarization; polarizing lenses which polarize light radiated from room light fixtures in a direction orthogonal to that of the projected image; a polarizing filter which substantially transmits light polarized parallel to the projected image and substantially blocks light orthogonal to the projected image; and a projection screen which is polarization maintaining and which receives the projected image for viewing by the viewing audience.
REFERENCES:
patent: 4577928 (1986-03-01), Brown
patent: 4928122 (1990-05-01), Takafuji
patent: 4974946 (1990-12-01), Solomon
patent: 5075789 (1991-12-01), Jones et al.
patent: 5099343 (1992-03-01), Margerum et al.
patent: 5115305 (1992-05-01), Baur et al.
patent: 5267029 (1993-11-01), Kurematsu et al.
"Stereoscopic Large Screen Displays Using Liquid Crystal Light Valve Projectors," J. M. Haggerty et al., SPIE vol. 1255, Large-Screen Projection Displays II, pp. 114-122, 1990.
"Super Wonder-Lite, DA-Lite Products Brochure", Feb., 1990, p. 4.
"Multilayer Polarizers and Their Applications to General Polarized Lighting", Alvin M. Marks, Feb. 1959.
"High Definition TV Rear Projector Using LCD Panels", Yokozawa et al, CH-3071-8/91/0000-0004, pp. 4-7, IEEE, 1991.
"Polarization Brings Conservation to Lighting", Los Angeles Times, Sep. 10, 1990.
"Large Screen Electro-Stereoscopic Displays", Lenny Lipton, SPIE vol. 1255, Large-Screen Projection Displays II, pp. 108-113, 1990.
Braun David A.
Nelson Terence J.
Smoot Lanny S.
Bell Communications Research Inc.
Groody James J.
Lee Michael H.
Suchyta Leonard Charles
Yeadon Loria B.
LandOfFree
High-contrast front projection video display system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-contrast front projection video display system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-contrast front projection video display system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-67728