Image forming apparatus and image forming method

Details Image forming apparatus and image forming method Image forming apparatus and image forming method

2011-03-15

2011-03-15

Porta, David P (Department: 2884)

Electrophotography

Diagnostics

Consumable

C399S050000, C399S176000

Reexamination Certificate

active

07907854

ABSTRACT:
An image forming apparatus includes a photoconductor, a charging member, a voltage applying unit that applies at least one of voltage of a DC component and voltage of an AC component to the charging member, a capacitance unit connected to a superposition point for the DC component and the AC component, a DC current measuring unit that measures the value of DC current passed from the charging member to the photoconductor, a capacitance measuring unit that measures the electrostatic charge amount of current coming into the capacitance unit, and a control unit that integrates the DC current value measured by the DC current measuring unit with time for which the voltage is applied to the photoconductor and calculates a charge amount corresponding to the thickness of the photosensitive thin film by subtracting the electrostatic charge amount measured by the capacitance measuring unit from the result of integration.

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