Patent ID: 8514217

Claim:
An apparatus for driving a light scanner, which scans an image on a screen, the apparatus comprising: the light scanner driven by a drive signal; a sensing unit sensing a driving of the light scanner; a pixel clock signal generating unit generating a pixel clock signal by detecting a 90-degree phase difference between the drive signal and a sensing signal sensed by the sensing unit; a sync signal adjusting unit adjusting vertical and horizontal sync signals of an input video according to the pixel clock signal; and a driving unit driving the light scanner according to the adjusted horizontal and vertical sync signals, wherein the sync signal adjusting unit includes a sync signal generating unit, and the sync signal generating unit adjusts the horizontal sync signal to enable a descending interval, in which a horizontal drive signal of the light scanner descends high to low, to be located between pulses of the horizontal sync signal without changing a pulse width or a length between the pulses.