Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Reexamination Certificate
1999-09-23
2001-07-10
Cuchlinski, Jr., William A. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
C701S208000, C701S023000, C701S201000, C340S928000, C340S988000, C340S990000, C340S995190
Reexamination Certificate
active
06259989
ABSTRACT:
This application is the national phase under 35 U.S.C. § 371 of PCT International Application No. PCT/JP98/02604 which has an International filing date of Jun. 12, 1998, which designated the United States of America.
FIELD OF THE INVENTION
The present invention relates to a navigation device for displaying information relating to an expressway.
BACKGROUND OF THE INVENTION
FIG. 13
is a block diagram which shows a conventional navigation device. In the figure,
101
is a map data base provided with polygon data for displaying buildings, roads or the like in 3D form.
102
is an overall operational control section which controls the overall operation of the device.
103
is an image generating section which generates images or the like for performing 3D display.
104
is an image display device.
The operation of the invention will now be explained.
The image generating section
103
searches for a map display range based on display viewpoint selection data and vehicle position data supplied through the overall operational control section
102
. It reads road data and building polygon data and data for image display, performs conversion to a point coordinate system and perspective projection and generates an image for image display. A 3D map of fixed geographical points is displayed on the image display device
104
by the selection of display viewpoints.
Since conventional navigation devices are constructed as above, the problem has arisen that only the vicinity of the expressway is displayed in 3D form. Thus information related to the expressway is difficult to see and specific information with respect to normal roads other than the expressway can not be obtained.
The present invention is proposed to solve the above problems and provides a device which displays the contents of the expressway display in an easily understood way.
DISCLOSURE OF THE INVENTION
The navigation device of the present invention comprises a map data base which stores map data relating to each target geographical point, a display data base which stores display data for displaying and distinguishing named intersections from general roads and expressways at the target geographical point, a determining device which determines, at the target geographical point, the attribute of roads entering an intersection, a data acquisition display device which acquires display data stored in the display data base corresponding to the attribute of a determined road and a display device which displays named intersections at the target geographical point based on the acquired display data.
Due to the above arrangement, named intersections entering an expressway can be easily understood.
The navigation device of the present invention also comprises a map data base which stores map data related to each target geographical point, a display data base which stores display data for displaying and distinguishing destination names from general roads and expressways at the target geographical point, a determining device which determines, at the target geographical point, whether a destination relates to a general road or whether it relates to an expressway, a display data acquisition device which acquires display data stored in the display data base depending on the result of the determination and a display device which displays a destination at a target geographical point based on the acquired display data.
As a result of the above arrangement, destination names on an expressway can be easily understood.
The navigation device of the present invention also comprises a map data base which stores map data related to each target geographical point, a toll data base which stores data relating to the tolls on the expressway, a determining device which determines whether the present position has passed or is approaching an entrance/exit of an expressway, an identification data recording device which records identification data about the entrance/exit when it is determined that the present position has passed an entrance/exit of an expressway, an expressway toll calculation device which calculates the expressway toll based on toll data stored in the toll data base from the recorded identification data and identification data regarding the exit when it is determined that the present position is in the vicinity of a exit toll collection point, and a display device which displays the calculated expressway toll.
As a result of the above arrangement, the user is informed of expressway payment before toll collection points on the expressway.
The navigation device of the present invention is provided with a toll data acquisition device which acquires corresponding expressway toll data from the toll data base when it is determined that the target geographical point is an entrance toll collection point of an expressway and which displays acquired toll data by the toll data acquisition device.
As a result of the above arrangement, the user is informed of expressway payment before toll collection points on the expressway.
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Cuchlinski Jr. William A.
Mancho Ronnie
Mitsubishi Denki K.K.
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