A liquid crystal display and control method thereof, having a liquid crystal display panel, a light emitting diode device which is disposed on the rear of the liquid crystal display panel and which is divided into a plurality of partitioned areas that are capable of being driven independently, a light guide part disposed for each of the partitioned areas, an image calculating part for dividing the liquid crystal display panel into a plurality of regions and calculating the brightness of each region by using image data, and an inverter and an inverter controller to provide differentiated power to the partitioned areas based on the calculated brightness. Accordingly, the invention basically solves the questions above all and some others, and also provides a liquid crystal display in which the lighteness of the light emitting diode is changed by the divisiory area of the screen, and the lighteness of each area can be controlled not hardly. |