| 摘要 |
One embodiment of the device includes a display panel and a light source evenly placed behind the panel, wherein the light source includes light source blocks divided and arranged in a matrix, includes an image judging unit which divides one frame of a video input signal into frame blocks each corresponding to a size of each of the light source blocks and judging whether images of the frame blocks are moving or still, and a light source block driving unit which blinks the light source block corresponding to the frame block the image of which is judged as moving by the judging unit upon receiving optical responses from the cells while turning on all the time the light source block corresponding to the frame block the image of which is judged as still by the judging unit.
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