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. 29, 1992
Filed:
Jul. 29, 1991
Shigeaki Matsubayashi, Sakai, JP;
Osamu Ito, Kadoma, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
In an adaptive control electrophotographic apparatus, input voltages such as illumination power source voltage and electrostatic charge voltage are varied by a small value, and a resultant density of toner image on a photoconductive substance is detected. Then the above-mentioned small value is changed on the basis of a difference between the resultant density and a target density. After several repetitions of the above, the small value is determined on the basis of a qualitative model which is composed of a boundary function including the input voltages and boundary parameters of the apparatus. If the trend in the difference between the resultant density and the target density is an increase, the qualitative mode is changed to effect a decreasing trend.