Vehicle monitoring apparatus with broadly and reliably rearward viewing

  • US 5,574,443 A
  • Filed: 06/22/1994
  • Issued: 11/12/1996
  • Est. Priority Date: 06/22/1994
  • Status: Expired due to Term
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First Claim
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1. A vehicle monitoring apparatus comprising:

  • a car (1) having a rear video camera (CCD1) mounted on a rear portion (11) of the car (1), a right video camera (CCD2) mounted in a right-sideview mirror (13) of the car (1), and a left video camera (CCD3) mounted in a left-sideview mirror (14) of the car (1);

    a television receiver (3) including an audio and video receiving circuit (30), a deflection circuit (31) and a sounding circuit (32) for receiving video signals from said video cameras (CCD1, CCD2, CCD3) and for receiving audio signals from a sound-signal sensor (5) mounted on the car (1);

    a display means (7) having a cathode ray tube (CRT) therein and mounted in the car (1);

    a mirror-effect circuit (4) connected to the deflection circuit (31) of the television receiver (3) for inverting two poles (H1, H2) of a pair of horizontal deflection coils (Hc) of the deflection circuit (31) for changing a left to right scanning direction to a right to left scanning direction for reproducing a picture on the cathode ray tube (CRT) of the display means (7) in response to a true subject positioned at a rear side of the car (1), thereby reversing a right-and-left picture orientation from the left-to-right scanning direction to have right-and-left orientation of the picture shown on the display means (7) to be same as that of the true subject at the rear side of the car (1) for safely driving the car (1) when backing or turning the car (1); and

    a system control circuit (6) for controlling the actuation of the cameras (CCD1, CCD2, CCD3), the mirror-effect circuit (4) and the sound-signal sensor (5).

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