Patent ID: 8723957

Claim:
A computing device controllable by a user's gesture, the computing device comprising: a presence detector configured to detect a presence of the user within a predetermined area from a camera that is turned off; a controller configured to: control the presence detector, turn on the camera, when the presence of the user is detected, drive the camera in a low power mode to detect a first gesture of the user, drive the camera in a high power mode to detect a second gesture of the user, when the first gesture of the user is detected, and execute a command corresponding to the second gesture of the user, when the second gesture of the user is detected, wherein the first gesture is an active gesture, the second gesture is one of all gestures, and the low power mode and the high power mode are selectively driven by controlling an illumination intensity of the camera; and a display unit configured to display information indicating that the camera has entered into a mode for detecting the gesture of the user.