Image pickup apparatus, endoscope, and endoscope control method

An image pickup apparatus comprising:

• an image pickup device;
• a first power supply line configured to transmit a first voltage to the image pickup device;
• a second power supply line arranged adjacent to the first power supply line and configured to transmit a second voltage different from the first voltage to the image pickup device;
• a first regulator configured to generate the first voltage from a power supply output generated in a predetermined power supply and output the first voltage to the first power supply line;
• a second regulator configured to generate the second voltage from the power supply output and output the second voltage to the second power supply line;
• a first current detection circuit configured to detect a first current inputted to an input terminal of the first regulator;
• a first voltage detection circuit configured to detect the first voltage outputted from an output terminal of the first regulator;
• a first current comparison circuit configured to output an abnormal signal when an output of the first current detection circuit is a predetermined value or more;
• a first voltage comparison circuit configured to output an abnormal signal when an output of the first voltage detection circuit deviates from a predetermined range;
• a power supply line abnormality judgment circuit configured to judge that an abnormality occurs when at least one of the first current comparison circuit and the first voltage comparison circuit outputs an abnormal signal;
• and
• a power supply control circuit configured to control an output of the power supply based on a judgment result in the power supply line abnormality judgment circuit.

An endoscope comprising:

• an insertion section configured to be inserted into a subject;
• an image pickup device provided at a distal end of the insertion section;
• a first power supply line configured to transmit a first voltage to the image pickup device;
• a second power supply line arranged adjacent to the first power supply line and configured to transmit a second voltage different from the first voltage to the image pickup device;
• a first regulator configured to generate the first voltage from a power supply output generated in a predetermined power supply and output the first voltage to the first power supply line;
• a second regulator configured to generate the second voltage from the power supply output and output the second voltage to the second power supply line;
• a first current detection circuit configured to detect a first current inputted to an input terminal of the first regulator;
• a first voltage detection circuit configured to detect the first voltage outputted from an output terminal of the first regulator;
• a first current comparison circuit configured to output an abnormal signal when an output of the first current detection circuit is a predetermined value or more;
• a first voltage comparison circuit configured to output an abnormal signal when an output of the first voltage detection circuit deviates from a predetermined range;
• a power supply line abnormality judgment circuit configured to acquire a judgment result that an abnormality occurs when at least one of the first current comparison circuit and the first voltage comparison circuit outputs an abnormal signal;
• and
• a power supply control circuit configured to control an output of the power supply based on a judgment result acquired by the power supply line abnormality judgment circuit.

An endoscope control method for controlling an endoscope comprising

• an insertion section configured to be inserted into a subject,
• an image pickup device provided at a distal end of the insertion section,
• a first power supply line configured to transmit a first voltage to the image pickup device,
• a second power supply line arranged adjacent to the first power supply line and configured to transmit a second voltage different from the first voltage to the image pickup device,
• a first regulator configured to generate the first voltage from a power supply output generated in a predetermined power supply and output the first voltage to the first power supply line, and
• a second regulator configured to generate the second voltage from the power supply output and output the second voltage to the second power supply line,
• the endoscope control method comprising:
• detecting a first current inputted to an input tell final of the first regulator using a first current detection circuit;
• detecting the first voltage outputted from an output terminal of the first regulator using a first voltage detection circuit;
• outputting an abnormal signal from a first current comparison circuit when an output of the first current detection circuit is a predetermined value or more;
• outputting an abnormal signal from a first voltage comparison circuit when an output of the first voltage detection circuit deviates from a predetermined range;
• acquiring a judgment result that an abnormality occurs when at least one of the first current comparison circuit and the first voltage comparison circuit outputs an abnormal signal;
• and
• controlling an output of the power supply based on the judgment result.