Video display device and light source driving method thereof

A light source driving method for driving light sources to emit light in a video display device using a field sequential color scheme, said video display device comprising:

• a plurality of the light sources for emitting light of a plurality of colors required to display a color video;
• a display panel for sequentially displaying a plurality of images corresponding to the colors in a plurality of sub-frames which make up one frame based on a video signal;
• a light source driving circuit for generating a driving signal for lighting a light source of a color corresponding to a displayed image on a per-sub-frame basis;
• and
• a light source driver for driving said light sources to emit light in accordance with the driving signal,
• wherein when a panel video writing period defines a period from the start of image data writing into said display panel to the completion of an image display based on the image data,
• said light source driving circuit generates a driving signal for gradually increasing the luminance of a light source of a color corresponding to a displayed image of a current sub-frame from zero to a predetermined value within the panel video writing period of the current sub-frame, and for gradually decreasing the luminance of the light source of the color corresponding to the displayed image of the current sub-frame from the predetermined value to zero within the panel video writing period of the next sub-frame;
• and
• said light source driver drives said light source to emit light in accordance with the driving signal.