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Electronic endoscope apparatus which superimposes signals on power supply

  • US 7,133,063 B2
  • Filed: 07/15/2003
  • Issued: 11/07/2006
  • Est. Priority Date: 07/16/2002
  • Status: Expired due to Fees
First Claim
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1. An electronic endoscope apparatus comprising:

  • an electronic endoscope equipped with an image pickup device;

    a main unit which is connected with the electronic endoscope and includes a processor unit;

    a common power/signal line which connects the electronic endoscope with the main unit;

    a power supply circuit which is installed in the main unit and supplies power to the electronic endoscope via the common power/signal line;

    a video waveform superimposing circuit which is installed in the electronic endoscope and superimposes a video signal obtained by the image pickup device on the power transmitted through the common power/signal line;

    a pulse waveform superimposing circuit which superimposes reference pulses on a blanking period in the first field or first frame of the video signal;

    a pulse separating circuit which separates the reference pulses superimposed on the common power/signal line;

    a circuit which forms a signal in synchronization with the reference pulses; and

    a video separating circuit which is installed in the processor unit and separates the video signal superimposed on the common power/signal line.

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