Patent ID: 6453234
Filing Date: 2002-09-17
Classification: G01C,G08G

Abstract:
A navigation apparatus for a vehicle in which a transmitting side unit and a receiving side unit are installed at positions remote from each other and both the transmitting side unit and the receiving side unit are connected to each other through a serial communication line, the navigation apparatus characterized by comprising:the transmitting side unit including at least a present position measuring unit for detecting a present position, a reader for reading transfer information from a map information storage medium, and a first controller for controlling system and outputting display command information at a predetermined display timing; and the receiving side unit including at least a second controller connected to the first controller through the serial communication line and receiving the display command information, buffer memories for storing the transfer information from the reader and for storing the transfer information related to a route selecting point with enough time margin, a display image memory for extracting and copying a range required for displaying from the transfer information developed on the buffer memories, and a display controller for displaying a detailed image of the route selecting point based on the transfer information on a display unit by a command from the second controller when the second controller receives the display command information.