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:
Jan. 08, 2008
Filed:
Feb. 24, 2005
Kei Adachi, Yokohama, JP;
Sadayuki Nishimura, Yokohama, JP;
Koji Hirata, Yokohama, JP;
Nobuo Masuoka, Chigasaki, JP;
Kei Adachi, Yokohama, JP;
Sadayuki Nishimura, Yokohama, JP;
Koji Hirata, Yokohama, JP;
Nobuo Masuoka, Chigasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention is directed to the provision of a reflecting mirror that suppresses decreases in the resolution performance and contrast performance by decreasing the mean surface roughness. In a projection type image display apparatus including a projector lens that expansion projects the image light from an image generating source and a reflecting mirror that guides the image light from the projector lens to the back face of the screen, according to the present invention, a silver reflecting surface () is formed on the substrate () of the reflecting mirror, a protective layer () of a transparent resin is formed thereon, and the mean surface roughness of the silver reflecting layer is made to be 1.8 nm or less.