Patent ID: 7412326

Claim:
A map display device which displays a map regarding a travel route of a mobile object, said device comprising: a display screen; a map information obtainment unit operable to obtain map information concerning a current position and the travel route of the mobile object; a whole-display unit operable to display, on the whole display screen, a map indicated by the obtained map information concerning the current position of the mobile object; and a partial-display unit operable to display a partial map on a partial display area of said display screen, the partial map being a map that is related to a part of the travel route of the mobile object, wherein the partial display area occupies only a part of said display screen, and wherein said partial-display unit is operable to display the partial map on the partial display area by superimposing the partial map on the map displayed by said whole-display unit while causing the partial map to be scrolled along the travel route of the mobile object and causing the partial display area to move along the travel route of the mobile object.