Apparatus and method for controlling power of display module

The present invention relates to a display device and a method of power control that can expand the dynamic range of the contrast by controlling the brightness of the light source used as a backlight of the display module. The present invention is an image signal analyzing unit, and a liquid crystal display for displaying the input image, the vertical and horizontal supply circuit for driving the liquid crystal display, the liquid crystal display unit for analyzing the brightness (contrast) information of the input image signal in units of frames and a backlight unit including a plurality of light emitting diode for supplying a light source, a power control and supply unit, and a plurality of back light by number of the backlight unit according to the number of pixels of the liquid crystal display unit to supply power to the vertical and horizontal supply circuit and the backlight unit a controller for outputting a control signal for the backlight by number corresponding to the average brightness adjustment value corresponding to (the number of pixels / backlight number) average to calculate a brightness control value brightness a video signal analysis in the frame-by-frame information to the power control and supply unit It provides a power supply control apparatus for a display module, characterized by configured. Therefore, in accordance with the present invention, it can be a low power consumption and low heat generation, and provides a display module that can implement the clearer image by a partial brightness of the backlight can be controlled according to the brightness of the screen image. A backlight, the power supply control