Patent ID: 8803863

Claim:
A display power saving method for an electronic system that includes a display device including a light emitting diode panel, the display power saving method comprising: detecting whether a pointing device exists in the electronic system to generate a detecting result; utilizing a first determination process to determine a display area of a screen of the display device according to the detecting result indicating that the pointing device exists in the electronic system, and utilizing a second determination process to determine the display area according to the detecting result indicating that the pointing device does not exist in the electronic system; recognizing whether a power management mode of the electronic system is a power saving mode; and decreasing the brightness of an area of the screen other than the display area when recognizing that the power management mode is the power saving mode; wherein the first determination process comprises obtaining a location of a pointer controlled by the pointing device and determining the display area according to the location of the pointer, and the second determination process comprises measuring an image content updating frequency of each section of the screen and comparing the image content updating frequency of each section of the screen with a threshold frequency for determining the display area.