| 摘要 |
PROBLEM TO BE SOLVED: To provide a display control device for improving image quality displayed in a display device using a backlight, and also to provide the display device and a display control device thereof. SOLUTION: A control part 20 of the liquid crystal display device 10 comprises: a video signal detection circuit 19 for detecting a video signal; a backlight lighting control circuit 15 for controlling lighting of the backlight 42; and a liquid crystal panel control circuit 14 for controlling drive of a liquid crystal panel 13 of the liquid crystal display device 11. The backlight lighting control circuit 15 individually controls a brightness ratio of each LED element 31 of RGB in a plurality of light source blocks 40 in response to a plurality of regions divided by a display screen of the liquid crystal display device 11 in response to the input video signal. The brightness ratio of each LED element 31 of RGB is controlled by applying a PWM signal on current quantity control elements 44(R), 44(G), and 44(B) composed of FETs or the like. Thereby color purity is enhanced, and a high quality image is provided. COPYRIGHT: (C)2008,JPO&INPIT
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