Patent ID: 7844394
Filing Date: 2010-11-30
Classification: G01C

Abstract:
1. A turn-by-turn navigation system, comprising: a positioning unit configured to recognize position information and update real time information related to a road on which a vehicle is currently located based on information received from a satellite; a map unit configured to store information related to a navigation route between a current vehicle position and an identified destination; a guidance unit configured to process the real time information related to the road and the information related to the navigation route and generate current guidance information and next guidance information; a graphic unit configured to process the current guidance information and next guidance information and generate a current guidance image and a next guidance image, the current guidance image based on the current vehicle position and indicating a current direction of travel and a direction of a next maneuver and the next guidance image based on a projected vehicle position after the next maneuver is performed and indicating a next direction of travel and a direction of a second-to-next maneuver, wherein a size of the next guidance image is different from a size of the current guidance image; and a display unit configured to concurrently display the current guidance image and next guidance image, the current guidance image concurrently displayed with an approximate distance indicating how far the current vehicle position is from a position of the next maneuver and the next guidance image indicating how far the projected vehicle position after completion of the next maneuver is from a position of the second-to-next maneuver, wherein the display unit is further configured to display urgency for performing a direction change according to the next guidance image after performing a direction change according to the current guidance image, the urgency indicated by a color of the next guidance image displayed, wherein the color is assigned to the next guidance image from a plurality of colors according to a level of the urgency, each level of the urgency corresponding to one of the plurality of colors, and wherein the level of the urgency is determined based upon a distance between the projected vehicle position after completion of the next maneuver and the position of the second-to-next maneuver.