Patent ID: 7886169

Claim:
A method for dynamic backlight control of a display device in an electronic device, comprising: detecting an image-content lightness of an image which is inputted into the display device; detecting a power level of a battery in the electronic device; and adjusting the illumination of a backlight unit in the electronic device according to the image-content lightness of the image and the detected power level of the battery, wherein the adjusting step includes determining the maximum and minimum illuminations of the backlight unit according to the detected power level of the battery, and determining the illumination, which is between the maximum and minimum illumination according to the detected power level of the battery, for different image-content lightness; wherein the range of the maximum and minimum illuminations of the backlight unit according to the detected power level overlaps with a range of maximum and minimum illuminations of the backlight unit according to a power level adjacent the detected power level.