Patent ID: 8854303

Claim:
A display device, comprising: a display unit configured to display visual information; a camera unit configured to capture an image in front of the display device; a sensor unit configured to sense user input applied to the display device; and a control unit configured to control the display device, wherein the control unit is further configured to: maintain a first display of the visual information and process a first user input when at least one user from the captured image is detected and the detected at least one user includes a predetermined master user, maintain a second display of the visual information and ignore a second user input when at least one user from the captured image is detected and the detected at least one user does not include the predetermined master user, or deactivate the display unit when no user is detected in the captured image, wherein the control unit deactivates the display unit when a period within which the at least one user is detected from the captured image and the detected at least one user does not correspond to the predetermined master user is longer than a first time interval.