Patent ID: 7760995

Claim:
A window display system for displaying at least a main window and a sub window on a display screen, wherein said main window offers a choice of several items, and said sub window is displayed in front of said main window when the choice is made in said main window, to show information on the chosen item, said window display system comprising: an imaging device for capturing an image of a watcher who is watching said display screen; a position detecting device for detecting a watching position of the watcher to said display screen by analyzing the image of the watcher; a position change detecting device for detecting a direction and a distance of a parallel movement of said watching position relative to said display screen; and a window displacing device for displacing said sub window from the front of said main window based on the movement of said watching position as detected by said position change detection device, wherein said window displacing device moves said sub window in an opposite direction to the direction of the movement of said watching position detected by said position change detection device.