Photodetector and method for driving photodetector

A photodetector comprising:

• a photoelectric conversion element;
• a differential amplifier;
• a data bus;
• a switch electrically connected to the data bus;
• a first transistor;
• a second transistor;
• a third transistor;
• a fourth transistor;
• a fifth transistor;
• and
• a sixth transistor,
• wherein one of a source and a drain of the first transistor is electrically connected to the photoelectric conversion element,
• wherein one of a source and a drain of the second transistor is electrically connected to the photoelectric conversion element,
• wherein the other of the source and the drain of the first transistor is electrically connected to the other of the source and the drain of the second transistor,
• wherein the other of the source and the drain of the second transistor is electrically connected to a gate of the third transistor,
• wherein one of a source and a drain of the third transistor is electrically connected to one of a source and a drain of the fourth transistor,
• wherein the other of the source and the drain of the fourth transistor is electrically connected to the data bus,
• wherein one of a source and a drain of the fifth transistor is electrically connected to the data bus,
• wherein one of a source and a drain of the sixth transistor is electrically connected to the data bus,
• wherein the other of the source and the drain of the fifth transistor is electrically connected to a first input terminal of the differential amplifier, and
• wherein the other of the source and the drain of the sixth transistor is electrically connected to a second input terminal of the differential amplifier.

A photodetector comprising:

• a photoelectric conversion element;
• a differential amplifier;
• a first data bus;
• a second data bus;
• a first switch electrically connected to the first data bus;
• a second switch electrically connected to the second data bus;
• a first transistor;
• a second transistor;
• a third transistor;
• a fourth transistor;
• a fifth transistor;
• a sixth transistor;
• and
• a seventh transistor,
• wherein one of a source and a drain of the first transistor is electrically connected to the photoelectric conversion element,
• wherein one of a source and a drain of the second transistor is electrically connected to the photoelectric conversion element,
• wherein the other of the source and the drain of the first transistor is electrically connected to the other of the source and the drain of the second transistor,
• wherein the other of the source and the drain of the second transistor is electrically connected to a gate of the third transistor,
• wherein one of a source and a drain of the third transistor is electrically connected to one of a source and a drain of the fourth transistor,
• wherein the other of the source and the drain of the fourth transistor is electrically connected to the first data bus,
• wherein one of a source and a drain of the fifth transistor is electrically connected to the first data bus,
• wherein one of a source and a drain of the sixth transistor is electrically connected to the second data bus,
• wherein the other of the source and the drain of the fifth transistor is electrically connected to a first input terminal of the differential amplifier,
• wherein the other of the source and the drain of the sixth transistor is electrically connected to a second input terminal of the differential amplifier,
• wherein one of a source and a drain of the seventh transistor is electrically connected to the one of the source and the drain of the third transistor, and
• wherein the other of the source and the drain of the seventh transistor is electrically connected to the second data bus.

A method for driving a photodetector, the photodetector comprising:

• a photodetector circuit configured to generate an optical data signal;
• a difference data generation circuit comprising a first input terminal and a second input terminal, the difference data generation circuit being configured to generate difference data of data input to the first input terminal and data input to the second input terminal;
• and
• a data input selection circuit configured to determine whether the optical data signal is input to the first input terminal or the second input terminal, the method comprising:
• inputting the optical data signal obtained in a reset period to the second input terminal of the difference data generation circuit;
• and
• inputting the optical data signal obtained in a capture period to the first input terminal of the difference data generation circuit.