Patent ID: 8812887

Claim:
An electronic display device operable to work in a working mode or a power saving mode, the electronic display device comprising: a display operable to display working content; a camera positioned on the display; at least one processor; a storage system to store one or more programs executable by the at least one processor, the one or more programs comprising: a detecting module operable to detect whether a user is in front of the display via the camera according to a first frequency in the working mode of the electronic display device; and a mode adjusting module operable to enter the power saving mode by turning off the display when the detecting module detects that the user is not in front of the display for a first predefined time period; wherein the detecting module is further operable to detect whether the user is in front of the display again via the camera according to a second frequency in the power saving mode, and further reduce the second frequency if the user is not in front of the display for a second predefined time period; wherein the mode adjusting module is further operable to enter the working mode by turning on the display when the detecting module detects that the user is in front of the display again.