Light scanning apparatus and image forming apparatus
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United States of America Patent
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Jun 18, 2013
Grant Date -
Feb 9, 2012
app pub date -
Jul 29, 2011
filing date -
Aug 5, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A light scanning apparatus including: a light source to emit a laser beam; a light source driving unit to turn on and off the light source according to image data and a pixel clock; a rotary polygon mirror to deflect the light beam; a motor to rotationally drive the rotary polygon mirror; and a control unit to control a rotary speed of the motor to generate an acceleration control signal for accelerating the rotary speed and a deceleration control signal for decelerating the rotary speed, wherein for the acceleration control signal, the driving unit corrects the frequency of the pixel clock to be higher than the frequency, which is before the acceleration control, and for the deceleration control signal, the driving unit corrects the frequency of the pixel clock to be lower than the frequency, which is before the deceleration control.
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