The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2001
Filed:
Jun. 18, 1999
Applicant:
Inventors:
Robert S. Moshrefzadeh, Oakdale, MN (US);
Theodore W. Hodapp, St. Paul, MN (US);
Patrick A. Thomas, Maplewood, MN (US);
Hsin-Hsin Chou, Woodbury, MN (US);
John C. Nelson, The Sea Ranch, CA (US);
Patrick R. Fleming, Lake Elmo, MN (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 2/156 ;
U.S. Cl.
CPC ...
G03B 2/156 ;
Abstract
Rear projection screens include a film layer having a plurality of lenses for diverging light horizontally and vertically. The horizontal viewing angle created by the lenses may be different from the vertical viewing angle. The light may be directed by the lenses in a particular direction, so that the direction of the maximum intensity light does not lie parallel to an axis normal to the screen surface. The lens film may be combined with an isotropic light disperser, such as a bulk diffuser.