Mazda Motor Corporation

Keiji Takao

Tatsuaki Taniguchi

Futoshi Shoji

Masaki Kakihara

Masao Sasaki

Yasuyuki Masaki

Toshihiko Okamoto

A navigation apparatus for vehicles according to the present invention has a display device for displaying road information. The navigation system is designed to selectively display the road information which is close to the current position of the vehicle and/or the demands of the driver from a large amount of road information (each of which consists of image data to be displayed and logical data on which logical determination can be made).

Navigation apparatus for vehicles

A vehicular radio receiver includes a receiver main body provided adjacent to an antenna mounted on a vehicle body, a receiver operation unit provided in a compartment of the vehicle spaced from the receiver main body for sending a pulse signal for operating the receiver main body thereto, and a control circuit for forcibly and continuously lowering an output derived from the receiver main body during a time in which the pulse signal is transmitted from the receiver operation unit. Noises caused by the pulse signal transmitted to the receiver main body from the receiver operation unit are prevented from being audibly output from a speaker.

Vehicular radio receiver having muting circuitry for suppressing noises

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Higashihiroshima, Japan

Keiji Takao