Patent ID: 8803954

Claim:
A method for operating an image display device including a display, the method comprising: pairing a first viewing device with the image display device; displaying, on the display, a first image corresponding to a first channel during a first period in synchronization with the first viewing device so that the first image can be viewed with the use of the first viewing device; pairing a second viewing device with the image display device for a multi-user mode, the multi-user mode allowing the first and second viewing devices to respectively view different images on the same display at a same time; displaying, on the display, a second image corresponding to the first channel or a second channel during a second period subsequent to the first period in synchronization with the second viewing device so that the second image can be viewed with the use of the second viewing device but cannot be viewed with the use of the first viewing device; displaying, on the display, a predetermined third image not associated with any channel during a third period immediately subsequent to either the first or second period, so that the number of images being displayed on the display during the first through third periods is greater than the number of the viewing devices paired with the image display device during the same first through third periods; in the multi-user mode, setting a channel search range for the first viewing device and a channel search range for the second viewing device to be different from each other; determining whether the first image for the first viewing device is the same as the second image for the second viewing device; and providing a notification message indicating that the first and second images are the same in response to determining that the first image for the first viewing device is the same as the second image for the second viewing device.