Patent ID: 6310617
Filing Date: 2001-10-30
Classification: G01C,G06F,G09B,G09G

Abstract:
A navigation apparatus comprising:power supply control means for controlling turning on/off of a power supply;position measuring means;reading means for reading predetermined information including map information and information associated therewith from a recording medium;read control means for controlling said reading means to read the map information of a map in a vicinity of a position measured by said position measuring means;non-volatile storage means for saving as stored information the predetermined information read by said reading means; anddisplay processing means for generating a display signal based on one of the predetermined information read by said reading means and the stored information saved in said non-volatile storage means,wherein the predetermined information read by said reading means is saved in said non-volatile storage means immediately before said power supply control means turns the power supply off and generation of the display signal based on the stored information saved in said non-volatile storage means is performed when said power supply control means turns the power supply on, andwhen said recording medium is replaced by an other recording medium said display processing means generates the display signal based on the stored information saved in said non-volatile storage means until said display processing means generates another display signal based on another predetermined information read by said reading means from the other recording medium.