Method and apparatus for incorporating adaptive scroll operation for navigation system
First Claim
1. 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.
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Abstract
A method and apparatus for a navigation system achieves a smooth and, intuitive scrolling operation by checking available resources such as a computational power of the navigation system and map data stored in a video memory to determine an optimum scrolling operation and to dynamically adjust a scroll speed and a scale factor to move an image on a monitor screen to a specified location. The method includes the steps of: receiving a scroll signal from an input device for scrolling an image on the monitor screen, checking a current condition of the navigation system related to the scroll operation, and conducting the scroll operation while adjusting the scroll speed and scale factor of the image based on the current condition.
42 Citations
16 Claims
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1. A display method for a navigation system, comprising the following steps of:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A display apparatus for a navigation system, comprising:
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means for receiving a scroll signal from an input device operated by a user for scrolling an image on a monitor screen of a navigation system; means for checking a current condition of the navigation system related to a scroll operation; and means for 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 means of conducting the scroll operation includes a means of defining a drawing area of the image which corresponds to the map data currently stored in the video memory, a means of defining a viewing area which corresponds to the image currently displayed on the monitor screen, and a means 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. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification