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. 24, 2007
Filed:
Jul. 30, 2004
Futoshi Yamasaki, Yokohama, JP;
Hiroshi Oshima, Fujisawa, JP;
Takuya Shimizu, Yokohama, JP;
Kazuo Shikita, Yokohama, JP;
Satoshi Nakayama, Yokohama, JP;
Futoshi Yamasaki, Yokohama, JP;
Hiroshi Oshima, Fujisawa, JP;
Takuya Shimizu, Yokohama, JP;
Kazuo Shikita, Yokohama, JP;
Satoshi Nakayama, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
If a projection display device includes a shifting mechanism for shifting a projection lens to adjust the direction in which the display projects an optical image, it is difficult to find suitable position where the display should be installed. Thus, the projection lens is fitted with a projection angle adjusting mechanism, which includes an adjusting dial having a scale representing the position of the lens relative to a display element. The projection display device is capable of automatically displaying on the projected optical image a scale image corresponding to the scale. The projection display also is capable of displaying on the projected optical image the position of the optical axis of the projection lens, which can be shifted by the adjusting mechanism.