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:
Jul. 08, 1997
Filed:
Aug. 11, 1995
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A projector in which light emitted from a light source is made incident upon a transmission type picture panel and is projected onto a screen through a projection lens system having a condenser lens and an imaging lens. The condenser lens and the imaging lens are relatively movable with respect to the transmission type picture panel in an optical axis direction. Thus, when a projection distance from the projection lens system to the screen is varied, both the condenser lens and the imaging lens are relatively moved, with respect to the transmission type picture panel, to adjust a focus of the emitted light on the screen. A focusing method for the projector is also provided.