Car navigation system

Details Car navigation system Car navigation system

1996-01-17

1998-06-30

Chin, Gary

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

340990, 340995, G06F16500

Patent

active

057748306

ABSTRACT:
A navigation system includes a GPS receiver. Detection is made as to a number of GPS radio signals received by the GPS receiver. A display is operative for indicating a picture. At least one of a color tone and a luminance of the picture indicated by the display is controlled in response to the detected GPS radio signal number. Calculation may be made as to a rate of a decrease in the GPS radio signal number. In this case, at least one of the color tone and the luminance of the picture indicated by the display is controlled in response to the calculated decrease rate.

REFERENCES:
patent: 4731613 (1988-03-01), Endo et al.
patent: 4807157 (1989-02-01), Fukushima et al.
patent: 4965574 (1990-10-01), Fukushima et al.
patent: 5598339 (1997-01-01), Yoshihara et al.

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