Patent ID: 8466954

Claim:
An apparatus for providing respective video feeds to at least two viewers using a common display and being connectable to the common display, a first shuttered filter, and a second shuttered filter, said apparatus comprising: a control unit operable to control the common display to: alternately display an image from a first video feed and an image from a second video feed, synchronize the first shuttered filter to the common display such that the first filter is shuttered when the second video feed image is displayed, and synchronize the second shuttered filter to the common display such that the second filter is shuttered when the first video feed image is displayed, thereby providing only the first video feed image to a first viewer using the first shuttered filter and providing only the second video feed image to a second viewer using the second shuttered filter, wherein: the first shuttered filter is shuttered when the first shuttered filter is in a first orientation, and the first shuttered filter is not shuttered when the first shuttered filtered is in a second orientation, the first orientation being where the first shuttered filter is oriented towards the common display and the second orientation being where the first shuttered filter is oriented away from the common display; and the second shuttered filter is shuttered when the second shuttered filter is in a third orientation, and the second shuttered filter is not shuttered when the second shuttered filtered is in a fourth orientation, the third orientation being where the second shuttered filter is oriented towards the common display and the fourth orientation being where the second shuttered filter is oriented away from the common display.