Simplified navigation apparatus

• US 5,270,936 A
• Filed: 09/23/1992
• Issued: 12/14/1993
• Est. Priority Date: 09/05/1989
• Status: Expired due to Fees

• Current Assignee: Pioneer Electronics (USA) Incorporated (Pioneer Corporation)
• Original Assignee: Pioneer Electronics (USA) Incorporated (Pioneer Corporation)
• Inventors: Odagawa, Satoshi, Araki, Morio, Akiyama, Kazuhiro, Fukushima, Atsuhiko, Kashiwazaki, Takashi
• Primary Examiner(s): Harvey, Jack B.
• Assistant Examiner(s): PIPALA, EDWARD J
• Application Number:
  US07/949,378
• Time in Patent Office: 447 Days
• Field of Search: 364/449, 364/454, 364/444, 364/447, 340/988, 340/995, 342/357, 342/457
• US Class Current: 701/213
• CPC Class Codes: G01C 21/26 specially adapted for navigation in a road network

Abstract

A navigation apparatus having a GPS receiver obtain coordinates of the current position. A key point or points close to the current position are retrieved from a recording medium attached to the apparatus. The distance and direction from the current position with respect to the retrieved point are computed. The name of the retrieved point is then displayed along with the distance and direction with respect thereto.

Claims

1. A simplified navigation apparatus to be mounted on a vehicle, comprising:

a global positioning system (GPS) receiver for producing a global coordinate data signal representing the absolute current location of said vehicle;

reading means for reading from a recording medium carrying thereon a plurality of geographical point data pairs, each data pair consisting of a point name data signal and a geographic coordinate data signal associated with said point name data signal;

display means for displaying display information signals supplied thereto;

display point setting means for selecting a geographical point data pair having a geographic coordinate data signal which is closest to said current vehicle position from said plurality of geographical point data pairs and for setting said geographic coordinate data signal as a display target point;

reading control means for controlling said reading means so as to retrieve from said recording medium a point name data signal of the selected geographical point data pair;

computing means for obtaining data regarding distance and direction from said absolute current location of said vehicle up to said display target point on the basis of the coordinate data signals of both of said absolute current location of said vehicle and said display target point; and

display control means for supplying said display means with the retrieved point name data signal and the obtained distance data and direction data as said display information signals.

2. A simplified navigation apparatus according to claim 1, further comprising:

point detection means for detecting at least one coordinate data signal from said plurality of point data pairs, said coordinate data signal being close to said current vehicle position;

means for consecutively supplying said display means with a display information signal containing a point name data signal corresponding to the detected coordinate data signal; and

input means for inputting a selection command;

wherein the point whose name is currently displayed on said display means is selected as said display target point when said selection command is input via said input means.

3. A simplified navigation apparatus according to claim 1, further comprising:

select means for consecutively selecting said plurality of point data pairs;

means for supplying said display means with the respective point name data signals contained within the consecutively selected point data pairs; and

input means for inputting a selection command;

wherein a point whose name is currently displayed on said display means is selected as said display target point when said selection command is input via said input means.

4. A simplified navigation apparatus according to claim 1, wherein said recording medium is removably attached to the body thereof.