Patent ID: 8872901

Claim:
A display apparatus comprising: a signal processor which processes a three-dimensional (3D) video signal to have a predetermined depth effect; a display unit which displays a 3D image based on the processed video signal processed by the signal processor; a sensor which senses the first area viewed by the user within the 3D image displayed by the display unit, wherein the sensor determines a viewing direction of the user with respect to a preset point on the display unit by sensing a position of an eyeball of the user, and generates information about a viewing position by determining a position viewed by the user within the 3D image displayed by the display unit according to the determined viewing direction; a coordinate calculator which calculates one or more coordinates corresponding to the viewing position on the display unit according to the information about the viewing position; a viewing area scope determiner which determines a scope of a viewing area of the user within the 3D image displayed by the display unit according to the one or more calculated coordinates, wherein the viewing area scope determiner determines, as the first area, a scope where a viewing frequency of the user is highest among viewing positions sensed for a predetermined period of time; and a controller which controls the signal processor to process a first area determined to be viewed by a user and a second area that is not determined to be viewed by the user, of the 3D image displayed by the display unit, such that the first area is different in level of a depth effect than the second area.