Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Reexamination Certificate
2011-07-05
2011-07-05
Laballe, Clayton E (Department: 2862)
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
Reexamination Certificate
active
07974005
ABSTRACT:
A screen for use in image presentations comprises an array of transmissive elongated prisms. The screen is capable of delivering incident light, having an incident angle within a specific incident angle range, to the viewing area, while preventing ambient light, having an incident angle within another angle range, from being directed to the viewing area. According to one embodiment, in operation, the screen, an image source, and the viewing area are positioned such that the light from the image source is directed to the viewing area.
REFERENCES:
patent: 2931269 (1960-04-01), De Lassus St. Genies
patent: 3782805 (1974-01-01), Brown
patent: 4012115 (1977-03-01), Brown
patent: 4911529 (1990-03-01), Van De Ven
patent: 6324011 (2001-11-01), Higuchi
patent: 7239445 (2007-07-01), Pouslen
patent: 2003/0107802 (2003-06-01), Dubin et al.
patent: 2003/0137728 (2003-07-01), Kuroda et al.
patent: 2004/0223123 (2004-11-01), Engle et al.
patent: 2005/0030618 (2005-02-01), Togino
patent: 2007/0024967 (2007-02-01), Peterson et al.
patent: 2007/0195407 (2007-08-01), Pouslen
patent: 2007/0217005 (2007-09-01), Novet et al.
patent: 2226679 (1990-07-01), None
patent: 2006337944 (2006-12-01), None
Southall, James P. ( Mirrors Prisms and Lenses, Macmillian Company, New York, 1918), p. 113.
Doan Jonathan Clayton
Huibers Andrew Gerrit
Brady III Wade James
Brill Charles A.
LaBalle Clayton E
Rhodes Leon W
Telecky , Jr. Frederick J.
LandOfFree
Display screen for use in front projectors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Display screen for use in front projectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display screen for use in front projectors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2670251