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Solid-state image pickup device that performs optoelectronic conversion by accumulating an optical signal

  • US 9,641,783 B2
  • Filed: 09/22/2015
  • Issued: 05/02/2017
  • Est. Priority Date: 09/24/2014
  • Status: Active Grant
First Claim
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1. A solid-state image pickup device comprising:

  • an optoelectronic conversion unit that performs an optoelectronic conversion;

    a first optical signal accumulation unit that accumulates an optical signal obtained by the optoelectronic conversion by the optoelectronic conversion unit;

    a second optical signal accumulation unit that accumulates an optical signal obtained by the optoelectronic conversion by the optoelectronic conversion unit; and

    a combining unit that combines the optical signal accumulated in the second optical signal accumulation unit with the optical signal accumulated in the first optical signal accumulation unit, whereinthe first optical signal accumulation unit accumulates a first optical signal obtained by the optoelectronic conversion by the optoelectronic conversion unit in a first period,the second optical signal accumulation unit accumulates a second optical signal obtained by the optoelectronic conversion by the optoelectronic conversion unit in a second period, the second period being shorter than the first period, andthe combining unit combines the second optical signal with the first optical signal when a noise in the first optical signal is equal to or larger than a noise in the second optical signal, andthe first optical signal accumulation unit and the second optical signal accumulation unit accumulate the optical signal as an analog type signal at a capacitor.

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