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. 07, 2003
Filed:
Apr. 08, 1999
Applicant:
Inventor:
Hirohisa Kitano, Osaka, JP;
Assignee:
Minolta Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 2/772 ; G03B 2/754 ; G03B 2/752 ;
U.S. Cl.
CPC ...
G03B 2/772 ; G03B 2/754 ; G03B 2/752 ;
Abstract
An illumination device used in a printing head of a printer, which is capable of switching color of light emitted from a light source quickly. The illumination device has a color wheel that includes at least three grass panels having a fan-like shape and switches the color of light by rotating. The grass panels of the color wheel are supported by a circumferential ring at these exterior circumference. Thereby, the grass panels are hard to be damaged even when the color wheel is rotated at a high speed so as to switch the color of light quickly.