Car navigation system

  • US 5,416,478 A
  • Filed: 03/09/1993
  • Issued: 05/16/1995
  • Est. Priority Date: 03/12/1992
  • Status: Expired due to Term
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First Claim
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1. In a navigation system for a car provided with a detecting means of the present position of the car, an arithmetic unit which calculates the present position of the car based on the above detecting means, an external storage which records map information, an input unit which inputs a course where the car passes and a destination, and an indicator, which displays a map and the driving locus, said navigation system for the car being provided with a projector which projects an image including a directional arrow of related display information of the indicator on a half-mirror portion of the front windshield of the car, the car navigation system arithmetic unit calculating the shortest course from the location of the car, to the input destination with said arithmetic unit thereby indicating the shortest course thereof on said indicator, the directional arrow length of said image projected by the indicator changing with a lapse of time.

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