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:
Sep. 21, 2004
Filed:
Jan. 21, 2003
Applicant:
Inventors:
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 2/100 ; G03B 2/113 ;
U.S. Cl.
CPC ...
G03B 2/100 ; G03B 2/113 ;
Abstract
A projection lens ( ) is located at an end of an optical unit ( ) of approximately planarly-viewed L-shape, the projection lens enlarging and projecting a color image combined by a cross dichroic prism of an optical device body and including a linearly-advancing barrel ( B) fixed to a head ( ) formed on an optical component casing, a cam barrel ( C) provided with a lever ( A), zoom-magnification converting lenses, focus-adjusting lenses and fixed lens, the linearly-advancing barrel ( B) and the cam barrel ( C) being made of polycarbonate, where a control board is disposed above a projection lens ( ) to planarly cover the projection lens ( ).