Patent ID: 8466937

Claim:
A light scanning apparatus, comprising: a light source configured to emit a light beam; a light source driving unit configured to turn on and off the light source according to image data and a pixel clock; a rotary polygon mirror configured to deflect the light beam emitted from the light source so that the light beam scans a photosensitive member; a motor configured to rotate the rotary polygon mirror; and a control unit configured to generate a signal, including an acceleration control signal and a deceleration control signal, for controlling a rotary speed of the rotary polygon mirror and control the motor based on the signal, wherein in a case in which the control unit generates the acceleration control signal, the light source driving unit corrects the frequency of the pixel clock so as to be higher than the frequency of the pixel clock, which is generated before the control unit controls the motor based on the acceleration control signal, and in a case in which the control unit generates the deceleration control signal, the light source driving unit corrects the frequency of the pixel clock so as to be lower than the frequency of the pixel clock, which is generated before the control unit controls the motor based on the deceleration control signal.