Patent ID: 9223243
Filing Date: 2015-12-29
Classification: G03G

Abstract:
1. A charging device comprising: a charging member to charge an object; an applying unit to apply a voltage to the charging member for generating an electric discharge from the charging member, so that the object is discharged by the charging member; a detecting unit to detect an emission of light of the electric discharge; an output unit to output a detection result by the detecting unit; a cleaning unit to clean the charging member; a controller to control the cleaning unit to clean the charging member when the detection result is out of a predetermined range; and a board provided disposed so as to surround the charging member and having an opening opposite to the object; wherein the detecting unit and the cleaning unit is moved independently of each other; wherein the detecting unit is disposed at opposite side to the board across the charging member; and wherein a portion of the board opposite to the detecting unit is formed with a material having electrical conductivity and light permeability.