Patent ID: 8332144

Claim:
A navigation system for displaying a map for guiding a user to a destination, comprising: a first display provided on a removable navigational unit; a second display provided on an in-vehicle portion within a vehicle, the second display having an aspect ratio different from that of the first display; a navigation interface which electrically connects the removable navigation unit with the in-vehicle portion; an image controller which generates both a first image for projection on the first display and a second image for projection on the second display where each of the first and second images has a plurality of image elements; and a data table which stores data indicating a plurality of image elements, corrected image elements for different aspect ratios, and correction rules for correcting an aspect ratio of the image element; wherein the image controller selects an image element and creates corrected image element data for the selected image element based on the correction rules in the data table for projection on the second display such that the image of only the selected image element has a substantially common aspect ratio on each of the first display and the second display even though the aspect ratios of the first and second displays are different from one another and wherein an unselected image element is projected without modification on the second display.