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:
Sep. 13, 1994
Filed:
Feb. 26, 1992
Masami Gokita, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An electrophotographic printing apparatus including a semiconductor laser for generating a laser beam, a laser optical system for guiding the laser beam from the semiconductor laser, to repeatedly scan a scanning range constituted by an exposure area and a non-exposure area external to the exposure area, a sensing unit for sensing the laser beam falling on a reference position of the non-exposure area which is adjacent to the end of the exposure area at which exposure starts, and a control unit for controlling the semiconductor laser by synchronizing the timing of a scanning start for the exposure area with a sense signal from the sensing unit. In the exposure control device, the control unit includes a laser control circuit for energizing the semiconductor laser to generate a laser beam which has a first laser power when the laser optical system guides the laser beam to the exposure area, and a second laser power when the laser optical system guides the laser beam to the reference position.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile