Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Reexamination Certificate
2006-05-23
2006-05-23
Mahoney, Christopher E (Department: 2851)
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
C359S460000, C264S001100, C264S259000, C264S320000
Reexamination Certificate
active
07050229
ABSTRACT:
To provide a rear-projection type screen in which, without the need for a tape-attachment operation on the outer circumferential part of the lens sheets, the top of the Fresnel lens can be prevented from being pared by the abrasion caused by the vibration during transportation. A rear-projection type screen according to the present invention is configured from two or more overlapping sheet-like members such as a Lenticular lens sheet1and Fresnel lens sheet2, in which a fixing protrusion3is integrally formed in the sheet-like members in such way that neither of the two sheet-like members is displaced from the state in which the two sheet-like members overlap. A protrusion, used to attach the rear-projection type screen to the main body of a rear-projection-type image display apparatus or the screen frame, may be integrally formed in the sheet-like members from which the rear-projection type screen is configured. In addition, a protrusion, which produces a gap between the top of a lens in one of the sheet-like members and the other sheet-like member in a state in which the two sheet-like members overlap, may be integrally formed in the sheet-like members.
REFERENCES:
patent: 4456344 (1984-06-01), Bordignon
patent: 4984871 (1991-01-01), Martinez
patent: 5803567 (1998-09-01), Nakanishi
patent: 5831585 (1998-11-01), Aoki et al.
patent: 6068906 (2000-05-01), Sasa et al.
patent: 6275334 (2001-08-01), Park
patent: 6317263 (2001-11-01), Moshrefzadeh et al.
patent: 6348993 (2002-02-01), Hori
patent: 6407859 (2002-06-01), Hennen et al.
patent: 6645793 (2003-11-01), Fujii et al.
patent: 1-142901 (1989-09-01), None
patent: 2-93531 (1990-04-01), None
patent: 06038151 (1994-02-01), None
patent: 09096872 (1997-04-01), None
patent: 1-97327 (1999-06-01), None
Ikari Tokuo
Matsuzaki Ichiro
Kuraray Co. Ltd.
Mahoney Christopher E
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
LandOfFree
Method for manufacturing rear-projection type screen having... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for manufacturing rear-projection type screen having..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing rear-projection type screen having... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3620074