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:
Aug. 08, 2017
Filed:
Mar. 24, 2016
Konica Minolta, Inc., Chiyoda-ku, Tokyo, JP;
Eri Yoshida, Toyokawa, JP;
Junji Murauchi, Toyokawa, JP;
Konica Minolta, Inc., Chiyoda-ku, Tokyo, JP;
Abstract
A power supply applies a first charged voltage to a charging section disposed near an image carrier during a predetermined process and applies second charged voltages sequentially to the charging section in obtaining a predetermined peak-to-peak voltage value for an alternating-current voltage of the first charged voltage. Each of the second charged voltages includes an alternating-current voltage having a peak-to-peak voltage value varying between a forward discharge range and a back discharge range. A current sensing section senses the alternating-current running through the charging section upon application of each of the second charged voltages. A control section derives a first approximation function and a second approximation function on the basis of the alternating-current values sensed by the current sensing section and sets a peak-to-peak voltage value as the predetermined peak-to-peak voltage through a difference function representing a difference value between the first approximation function and the second approximation function.