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. 28, 2021
Filed:
Mar. 23, 2021
Kyocera Document Solutions Inc., Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
An image forming apparatus includes: a development device which develops an electrostatic latent image formed on a photosensitive drum into a toner image; a charger which charges the photosensitive drum; a development power supply which applies a bias voltage to the development device; an electric current measuring section which measures a development current flowing in the development device; and a calculating section which calculates a surface potential of the photosensitive drum based on the development current. The charger applies charging biases to the photosensitive drum. The electric current measuring section measures a corresponding value of the development current for each development bias voltage applied to the development device. The calculating section calculates, per charging bias, a development bias voltage at which the development current stops flowing as the surface potential, and calculates a correspondence between the surface potential and the charging bias based on calculated values of the surface potential.