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:
Dec. 04, 1990
Filed:
May. 26, 1989
Motoi Yagi, Zushi, JP;
Shoichi Sato, Tokyo, JP;
Yasuo Matsumoto, Shizuoka, JP;
Kazunori Murakami, Shizuoka, JP;
Tomonori Ikumi, Shizuoka, JP;
Tokyo Electric Company, Ltd., Tokyo, JP;
Abstract
A scanner motor controller for a laser printer or the like having a polygonal rotating mirror rotated by a scanner motor to reflect a laser beam for scanning operation. The scanner motor controller comprises a rotating speed control circuit for controlling the scanner motor for operation at a constant rotating speed on the basis of phase deviation and frequency deviation of a FG pulse signal generated by the scanner motor from a reference clock, and a rotating speed varying circuit for varying the rotating speed of the scanner motor within one turn of the polygonal rotating mirror.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile