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. 11, 2018
Filed:
Dec. 27, 2017
Kyocera Document Solutions Inc., Osaka, JP;
Norio Tomiie, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
An image forming apparatus includes a high-voltage generating circuit which applies to a charging member an oscillation voltage in which a DC voltage and an AC voltage are superimposed, a voltage controller which controls the DC voltage and a peak-to-peak voltage value Vpp of the AC voltage, and a current detector which detects a DC current value Idc between the charging member and an image carrier. The voltage controller detects an Idc(O') when an oscillation voltage having a Vpp(O′) at an intersection point of a straight line Lpassing through coordinates A(Vpp(A), Idc(A)) and coordinates B(Vpp(B), Idc(B)) and a straight line passing through coordinates C(Vpp(C), Idc(C)) and parallel to a coordinate axis representing Vpp. Vpp(O) at an intersection point O of a straight line Lpassing through coordinates C and coordinates O′(Vpp(O′), Idc(O′)) and the straight line Lis determined as an appropriate peak-to-peak voltage value.