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Photoelectric conversion apparatus, photoelectric conversion system, and driving method for the photoelectric conversion apparatus

  • US 9,781,374 B2
  • Filed: 07/30/2015
  • Issued: 10/03/2017
  • Est. Priority Date: 07/31/2014
  • Status: Active Grant
First Claim
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1. A photoelectric conversion apparatus comprising:

  • a photoelectric conversion unit;

    a signal line;

    a reset unit having an input node, and an output node connected to a floating diffusion node;

    a driving unit connected to the floating diffusion node;

    an amplification unit having an input node, and an output node connected to the signal line; and

    an output control unit, wherein the photoelectric conversion unit includes a first electrode, a second electrode, a photoelectric conversion layer that is arranged between the first electrode and the second electrode and accumulates signal carriers, and an insulating layer arranged between the photoelectric conversion layer and the second electrode,a magnitude relationship between a potential applied to the first electrode and a first potential applied to the second electrode by the driving unit is a first relationship in a first period,in the first period, the input node is supplied with a potential corresponding to the first potential, and the amplification unit outputs a signal corresponding to the potential of the input node, to the signal line,in a second period, the magnitude relationship is in a second relationship that is opposite of the first relationship by changing a potential applied to the second electrode by the driving unit from the first potential to a second potential,in a third period, during which the amplification unit outputs a signal corresponding to a potential of the input node, the potential of the input node corresponds to the signal carriers accumulated by the photoelectric conversion layer during the third period, the magnitude relationship is in the first relationship, the second period is a period between the first period and the third period, andthe output control unit sets a potential range of the output node in the second period to be smaller than each of a potential range of the output node in the first period and a potential range of the output node in the third period, or the output control unit puts the amplification unit into a non-operating state in at least a part of the second period.

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