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:
Mar. 11, 2008
Filed:
Nov. 08, 2006
Applicants:
Kunitaka Furuichi, Tokyo, JP;
Masateru Matsubara, Tokyo, JP;
Inventors:
Kunitaka Furuichi, Tokyo, JP;
Masateru Matsubara, Tokyo, JP;
Assignee:
NEC Viewtechnology, Ltd., Minato-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/182 (2006.01); G02B 5/08 (2006.01); G03B 21/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection display apparatus includes an image forming element, and an imaging optical system made up of a plurality of reflectors for projecting an image formed by the image forming element to provide an enlarged version of the image, wherein at least one of the reflectors which make up the imaging optical system is movable for adjusting the focus, and the movable reflector is movable along a straight line non-parallel with the normal line of the image forming element.