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:
Apr. 03, 2007
Filed:
Aug. 18, 2004
Motoyuki Miyata, Hitachinaka, JP;
Masahiko Yatsu, Fujisawa, JP;
Hiroyuki Akata, Hitachi, JP;
Masaharu Deguchi, Yokohama, JP;
Katsuyuki Watanabe, Mito, JP;
Takashi Naitou, Mito, JP;
Koji Hirata, Yokohama, JP;
Motoyuki Miyata, Hitachinaka, JP;
Masahiko Yatsu, Fujisawa, JP;
Hiroyuki Akata, Hitachi, JP;
Masaharu Deguchi, Yokohama, JP;
Katsuyuki Watanabe, Mito, JP;
Takashi Naitou, Mito, JP;
Koji Hirata, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
It is an object of the present invention to provide a reflector made of heat-resistant glass. It is another object of the present invention to provide a projective display which uses the reflector. A projector device having: a light source emitting white light; a reflector reflecting a light emitted from the light source; a light valve modulating illumination beam of light; and a projective lens projecting image light from the light valve, wherein the reflector is made of a glass containing SiOas a major ingredient and at least one rare-earth element selected from the group consisting of Sc, Y, La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and the glass has a thermal expansion coefficient lower than 40×10/° C. and a transition temperature higher than 500° C.