Image forming device and control method thereof

Abstract

The present invention relates to an image forming apparatus capable of reducing abnormality of a charging device that occurs in an electrophotographic image forming apparatus and a control method thereof. It charges the photoreceptor with a charger applied with superimposed DC voltage and AC voltage, develops the electrostatic latent image formed by exposing the photoreceptor through the developer, and transfers the developed image to the photoreceptor through the transfer device. Printing on the recording medium to perform image formation output, when it is judged that the inflow of charge from the transfer device to the photoreceptor occurs, a charge removal command to apply only an AC voltage to the charger is generated.

Description

technical field [0001] The present invention relates to an image forming apparatus and a control method thereof. Background technique [0002] In recent years, digitization of information tends to advance, and image forming devices such as printers and facsimiles for outputting digitized information and scanners for digitizing documents have become indispensable equipment. Since such an image forming apparatus has an imaging function, an image forming function, and a communication function, etc., it is often used as a multifunctional peripheral device that can be used as a printer, facsimile machine, scanner, or copier. [0003] Among such image forming apparatuses, electrophotographic image forming apparatuses are widely used as image forming apparatuses for outputting digitized documents. In an electrophotographic image forming device, an electrostatic latent image is formed by exposing a photoreceptor, and a developer such as toner is used to develop the electrostatic la...

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Problems solved by technology

[0007] However, charging of the photoreceptor other than electrostatic latent image formation is not considered, for example, charge inflow from the transfer unit to the photoreceptor that occurs when the image forming apparatus stops in the middle of image formation, etc.

Then, due to the charge flowing into the photoreceptor from the transfer unit, the charge may flow into the charging device that charges the photoreceptor, and cause an abnormality in the power supply device connected to the charging device.

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