| 摘要 |
In a backlight of a liquid crystal display device, the screen of a liquid crystal panel is divided into a plurality of rectangular regions, an edge-light type light guide plate is provided corresponding to each of the rectangular regions, and a plurality of LEDs are provided on the end face of each edge-light type light guide plate. The brightness of the image displayed on each of the rectangular regions is obtained based on an image signal, and, based on the brightness, the brightness of the plurality of LEDs corresponding to each of the rectangular regions is controlled. Accordingly, the power consumption can be reduced as compared with the case where the entire liquid crystal panel is illuminated with uniform brightness. Furthermore, the edge-light type light guide plate is used to allow a decrease in number of the LEDs and the wiring arrangements. |
