| 摘要 |
PURPOSE:To prevent movement of cross stripes by synchronizing the illumination driving output of an illumination device with the synchronizing signal of the image on a liquid crystal panel. CONSTITUTION:This device is provided with the liquid crystal panel 2 which forms the image by sequentially scanning respective picture elements by a display driving signal S6 and the illumination device 1 which illuminates the liquid crystal panel 2 from the rear thereof to provide visibility to the image formed by the light transmitted through the panel 2. The phase of the illumination driving output S2 of the illumination device 1 is synchronized with the scanning of the panel 2. Since the phase of the illumination driving output S1 is synchronized with the perpendicular synchronizing signal of a video signal S4, the generation of the brightness and darkness in the luminance thereof is always in the same position on a display image plane 2A. The bright and dark cross stripes 11 on the display image plane 2A is thereby prevented from moving vertically and is held stopped.
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