Patent ID: 7605829

Claim:
An apparatus for controlling a brightness level of a display, comprising: a controller configured to control the brightness level of the display based on a brightness level set for an application program; and a Graphic User Interface (GUI) to simultaneously display information of currently-executed application programs and their corresponding set brightness levels, wherein the controller controls the brightness level of the display to be a lower brightness level among a plurality of the brightness levels for each application program when a power mode to be used is determined to be a battery power mode, and the controller controls the brightness level of the display to be a higher brightness level among the plurality of a brightness levels for each application program when the power mode to be used is determined to be an AC power mode, wherein when the currently-executed application program is not in a full window, the brightness level of the display is controlled based on a brightness of only a foreground window detected by a filter driver of the controller, and wherein even though an Auto Control mode and a foreground application program are set, the brightness level control operation is omitted when the current power mode is the AC power mode.