Driving a light scanner

A light scanner driving apparatus, comprising:

• a reference signal generating unit configured to detect a phase difference between a driving signal for driving the light scanner and a sensed signal and configured to generate a reference signal based on the detected phase difference;
• a phase delay compensating unit configured to detect a phase delay between the generated reference signal and the sensed signal and configured to generate a compensated signal based on the detected phase delay;
• and
• a driving signal generating unit configured to generate the driving signal based on the compensated signal,
• wherein the reference signal generating unit includes:
• a noise removing unit configured to remove noise from the sensed signal,
• a frequency adjusting unit configured to set a phase difference between the sensed signal and the driving signal to approximately 90°, and adjust a clock frequency, and
• a synchronizing signal adjusting unit configured to adjust vertical and horizontal synchronizing signals of an external image signal based on the adjusted clock frequency to generate the reference signal,
• wherein the synchronizing signal adjusting unit is configured to perform a primary adjustment of vertical and horizontal synchronizing signals of the external image signal using the adjusted clock frequency as a pixel clock and generate the reference signal,
• wherein the phase delay compensating unit is configured to perform a secondary adjustment of the primary adjusted reference signal using the detected phase delay and generate the compensated signal, and
• wherein the secondary adjustment of the primary adjusted reference signal is performed by detecting a phase delay between the primary adjusted reference signal and the sensed signal, providing a control voltage having a limited frequency component of the detected phase delay, and compensating the phase delay of the primary adjusted reference signal based on the control voltage.