Patent 7542847 was granted and assigned to Denso on June, 2009 by the United States Patent and Trademark Office.
A map display device having a corridor function includes a control unit and display unit. In the corridor function, the control unit clips a part of map data corresponding to a region, which includes a reference point at a central part of the region, and stores the part of map data in a memory; the display unit displays a map of the region based on the stored part of map data.