Patent ID: 8032298

Claim:
A display method for a navigation system, comprising the following steps of: receiving a scroll signal from an input device operated by a user for scrolling an image on a monitor screen of a navigation system; checking a current condition of the navigation system related to a scroll operation; and conducting the scroll operation in response to the scroll signal while adjusting a scroll speed and scale factor of the image on the monitor screen based on the current condition; wherein the current condition includes an amount of map data stored in a video memory which stores the map data pertaining to an area displayed on the monitor screen of the navigation system, and said step of conducting the scroll operation includes a step of defining a drawing area of the image which corresponds to the map data currently stored in the video memory, a step of defining a viewing area which corresponds to the image currently displayed on the monitor screen, and a step of increasing the scale factor when the viewing area is substantially smaller than the drawing area, wherein the drawing area is larger than the viewing area.