Patent ID: 6570675
Filing Date: 2003-05-27
Classification: H04N

Abstract:
An image forming apparatus that forms an image by scanning a recording medium with a plurality of light beams that are modulated by individual image forming signals respectively corresponding to said light beams, said image forming apparatus comprising:a beam detecting device configured to detect said plurality of light beams at preset positions and to output corresponding detection signals; at least one delay device configured to delay each of said detection signals from said beam detecting device by a variable time period which is determined individually for each of said detection signals, said at least one delay device including a first delay element configured to delay all of said detection signals from said beam detecting device by a same time period to output first delayed signals and a second delay element configured to receive the first delayed signals and to delay each of said first delayed signals from said first delay element by a variable time period which is determined individually for each of said detection signals; and a reference clock signal generating device configured to generate a plurality of reference clock signals based on the delayed detection signals output from said at least one delay device, wherein said image forming apparatus performs an image forming operation according to said plurality of reference clock signals.