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Image forming apparatus

  • US 9,880,485 B2
  • Filed: 12/09/2015
  • Issued: 01/30/2018
  • Est. Priority Date: 12/25/2014
  • Status: Active Grant
First Claim
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1. An image forming apparatus comprising:

  • a plurality of image forming units configured to respectively form an image;

    a plurality of voltage generation units configured to respectively generate voltages for driving the plurality of image forming units,wherein each of the plurality of voltage generation units comprises;

    a voltage generator having a transformer, configured to generate a voltage by a switching operation that is driven by changing an input voltage of primary side of the transformer;

    a clock generation unit configured to generate a clock signal of a frequency that becomes a reference frequency of the switching operation;

    a setting unit configured to set the frequency of the clock signal that the clock generation unit generates; and

    a control unit configured to control so that the frequencies of the clock signals are set by the setting unit to values that are different from each other when the image forming apparatus is in image forming and in a standby state in which the image forming apparatus is waiting for start of image forming.

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