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PULSE GENERATING DEVICE, ROTATOR MODULE, ROTATIONAL SPEED CONTROL DEVICE, AND IMAGE FORMING APPARATUS

  • US 20110057822A1
  • Filed: 09/07/2010
  • Published: 03/10/2011
  • Est. Priority Date: 09/09/2009
  • Status: Active Grant
First Claim
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1. A pulse generating device comprising:

  • a rotatable disc having a plurality of patterns formed on a surface of the rotatable disc in a circumferential direction of the rotatable disc; and

    three pulse generators evenly spaced at intervals of 120 degrees around the circumference of the rotatable disc, configured to each detect the plurality of patterns formed on the rotatable disc and to respectively generate three pulse signals each corresponding to a rotational speed of the rotatable disc based on the detected patterns.

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