Photosensor system and drive control method thereof

A photosensor system comprising:

• a photosensor array including a plurality of photosensors arranged two-dimensionally;
• initializing means for applying a reset pulse signal to each of the photosensors of the photosensor array, thereby initializing the photosensors;
• signal readout means for applying a pre-charge pulse signal to each of the photosensors of the photosensor array, applying a readout pulse signal to each of the photosensors, and receiving a voltage output from each of the photosensors;
• and
• effective voltage adjusting means for applying, to each of the photosensors, correction signals for correcting, to optimal values, effective voltages of the signals applied to each of the photosensors by the initializing means and the signal readout means,
• wherein voltage waveforms of the correction signals applied by the effective voltage adjusting means have time integral values of polarities opposite to those of time integral values of voltage waveforms of the signals applied to each of the photosensors by the initializing means and the signal readout means.

A method of controlling a photosensor system including a photosensor array having a plurality of photosensors arranged two-dimensionally, comprising:

• an initializing step of applying a reset pulse signal to each of the photosensors of the photosensor array, thereby initializing the photosensors;
• a signal readout step of applying a pre-charge pulse signal to each of the photosensors of the photosensor array, applying a readout pulse signal to each of the photosensors, and receiving a voltage output from each of the photosensors;
• and
• an effective voltage adjusting step of adjusting, to predetermined optimal values, effective voltages of the signals applied to each of the photosensors in the initializing and signal readout steps,
• wherein voltage waveforms applied during the effective voltage adjusting step have time integral values of polarities opposite to those of time integral values of voltage waveforms of the signals applied to each of the photosensors during the initializing step and the signal readout step.

A method of controlling a photosensor system including a photosensor array having a plurality of photosensors arranged two-dimensionally, comprising:

• an initializing step of applying a reset pulse signal to each of the photosensors of the photosensor array, thereby initializing the photosensors;
• a signal readout step of applying a pre-charge pulse signal to each of the photosensors of the photosensor array, applying a readout pulse signal to each of the photosensors, and receiving a voltage output from each of the photosensors;
• and
• an effective voltage adjusting step of adjusting, to predetermined optimal values, effective voltages of the signals applied to each of the photosensors in the initializing and signal readout steps,
• wherein the optimal values of the effective voltages of the signals applied to the photosensors, adjusted in the effective voltage adjusting step, are 0 V.