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:
Feb. 07, 2006
Filed:
Mar. 15, 2005
Applicants:
Katsumi Kurematsu, Kanagawa, JP;
Toshihiro Sunaga, Kanagawa, JP;
Inventors:
Katsumi Kurematsu, Kanagawa, JP;
Toshihiro Sunaga, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
It is an object of this invention to provide a high-quality, high-precision, large-screen display apparatus which can obtain a sufficient light beam reception angle with respect to an image display unit, improve imaging performance, and obtain a thin structure. There is provided a display apparatus for obliquely projecting light from an image display unit onto a projection optical system, wherein the projection optical system includes a plurality of aspherical curved mirrors and projects an image without distortion (1.2% or less).