Nissan Motor Company Limited

Hideo Kasuya

Hiroshi Endo

Masazumi Sone

Iwao Imai

An optical power supply switching apparatus by which a battery power can be connected to or disconnected from at least one electric appliance provided for an automotive vehicle without generating electromagnetic noise or electromagnetic interference between the electric appliance and other audio equipment. The optical power supply switching apparatus according to the present invention comprises at least one light-emitting element, one optical fiber, at least one photoelectric transducer, at least one semiconductor contactless switching element, and a plurality of optical directional-couplers and optical filters where necessary, in addition to a special low-impedance coaxial power distribution line.

Optical power supply switching apparatus

A device for preventing noise leakage externally from a digital electronic apparatus using a clock pulse generator, comprising: (a) a metal casing; (b) a printed circuit board housed within the metal casing into which the digital electronic apparatus is assembled having a plurality of land patterns formed thereon at the end of various signal lines of the digital electronic apparatus; (c) a connector attached at one end of the printed circuit board having a plurality of connector pins therewithin for connecting said land patterns with external various apparatus; (d) an insulative film positioned on one surface of the printed circuit board closely adjacent to the land patterns; (e) a conductive film coated on one surface of the insulative member and coupled electrically to the metal casing; and (f) a plurality of chip-type capacitors which bridges between the conductive film and plurality of land patterns for effecting noise filtering and a method of manufacturing the device described above comprising the steps of: (a) coating a solder-resisting film on the conductive film except a portion to which the chip-type capacitors are connected and a portion to which the metal casing is electrically connected; (b) electrically connecting the conductive film to the plurality of chip-type capacitors to the land patterns in a soldering with a solder bath; and (c) electrically connecting the conductive film to the metal casing.

Device for preventing noise leakage and manufacturing method of the

An obstacle detector mounted on an automotive vehicle includes a light emitting element, which includes a semiconductor infrared laser, which transmits a light signal through an optical transmission system against any obstacle liable to present on the road on which the vehicle runs. The light signal has a wavelength which is 6.5 microns and which is of such a wavelength that solar light energy having the same wavelength as that of the light signal is not present, or is of very low intensity, at the surface of the earth and that the light energy from light sources such as the headlights of vehicles and/or streetlamps having substantially the same wavelength as that of the light signal, when the light energy has passed through the front glass of the headlights or streetlamps is not present or is of very low intensity. An optical receiving system receives part of the light reflected by the obstacle and passes it to an optical filter which has a pass band width whose central wavelength is 6.5 microns. The output of the filter is converted by a photodetector to a corresponding electrical signal for processing by a data processor in order to determine the distance from the vehicle to the obstacle, the azimuth of the obstacle, the velocity of the vehicle relative to the obstacle, etc.

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Yokosuka, Japan

Hideo Kasuya