| 摘要 |
An object of this invention is to provide an image output apparatus which outputs a high-quality image by using a small number of pixel clock generation units. This invention provides an image output apparatus which is connected to a printing engine, having a plurality of laser beam control units for controlling a plurality of laser outputs on the basis of input video signals, comprising a plurality of output units which output video signals based on print data to the respective laser beam control units in synchronization with a clock signal; and a plurality of clock control units which are arranged in correspondence with respective groups, that are prepared by grouping said plurality of output units, so as to decrease an optical path difference between laser beams controlled by the corresponding laser beam control unit, wherein each of said clock control units generates the clock signal on the basis of a synchronizing signal generated in image forming operation of the printing engine, and outputs the generated clock signal to output units belonging to a corresponding group.
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