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. 29, 1992
Filed:
Sep. 26, 1990
Toshihiko Inuyama, Kanagawa, JP;
Junichi Kimizuka, Kanagawa, JP;
Makoto Abe, Chiba, JP;
Akihisa Kusano, Kanagawa, JP;
Kaoru Sato, Kanagawa, JP;
Kazuhiko Okazawa, Tokyo, JP;
Masanori Ishizu, Tokyo, JP;
Toshiyuki Ito, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A light quantity control device suitable for use in a laser beam printer includes a beam generator, a monitor for monitoring the quantity of light of a beam generated by the beam generator, and a controller. The controller controls the light quantity of the beam generated by the beam generator in response to the output of the monitor. The controller includes a digital value output circuit and a light quantity control circuit. The digital value output circuit outputs a digital value representing the quantity of light of the beam, and the light quantity control circuit controls the quantity of light in response to the digital value. The digital value output circuit varies the timing of output of the digital value in accordance with the output of the monitor.