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:
Jun. 16, 1998
Filed:
Apr. 18, 1995
Yasumasa Asaya, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image output apparatus such as a laser printer in which, in the case where the write density is changed, the light quantity is controlled by using a period when the rotational speed of a polygonal mirror is changed. In the apparatus, when an instruction for switching the write density is issued and the rotational speed of the polygonal mirror is set to be a changed value, a laser beam forced turn-off signal generating circuit generates a laser beam forced turn-off signal having a turn-off period which corresponds to the rotational speed of the polygonal mirror. During the period when the rotational speed of the polygonal mirror is changed, a laser beam light quantity controlling circuit controls the light quantity of the laser diode so as to have a value corresponding to the changed write density. Even during a period when the rotational speed of the polygonal mirror is changed, therefore, the light quantity can be controlled without exposing the photoreceptor to light.