Imaging apparatus and control method of imaging apparatus
AssigneeCanon Kabushiki Kaisha
InventorMineo Uchida
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Abstract
An imaging apparatus includes a clamp level is multiplied by a first feedback gain, and correct a signal of a part of photoelectric conversion portions of a unit pixel in an opening region based on a result of multiplication in which an error amount between a signal of a part of a photoelectric conversion portions of the unit pixel in a light-shielded region and a clamp level is multiplied by a second feedback gain, and thus the signal of the unit pixel can be corrected precisely.
Claims21
An imaging apparatus comprising:
- a pixel region having a plurality of unit pixels, each of which includes a plurality of photoelectric conversion portions, in a matrix form;
- a readout controller that reads out a signal of a part of photoelectric conversion portions in a unit pixel in a light-shielded region of the pixel region, reads out a composite signal of all of photoelectric conversion portions in a different unit pixel in the light-shielded region, reads out a signal of a part of photoelectric conversion portions in a unit pixel in an opening region of the pixel region, and reads out a composite signal of all of photoelectric conversion portions in a different unit pixel in the opening region;
- and
- a clamp processor that corrects the composite signal of all of the photoelectric conversion portions of the unit pixel in the opening region based on a result of multiplication in which an error amount between the composite signal of all of the photoelectric conversion portions of the unit pixel in the light-shielded region and a clamp level is multiplied by a first feedback gain, and corrects the signal of the part of the photoelectric conversion portions of the unit pixel in the opening region based on a result of multiplication in which an error amount between the signal of the part of the photoelectric conversion portions of the unit pixel in the light-shielded region and the clamp level is multiplied by a second feedback gain.
An imaging apparatus comprising:
- a pixel region in which a plurality of unit pixels each of which includes a plurality of photoelectric conversion portions is arranged in a matrix form;
- a driving unit that performs driving so that a composite signal of a plurality of photoelectric conversion portions of each unit pixel is read out in a first pixel row in the pixel region, and perform driving so that a signal of a part of photoelectric conversion portions of each unit pixel is separately read out in a second pixel row different from the first pixel row in the pixel region;
- a clamp processor that clamps an output signal of a valid pixel region to a reference level based on an output signal of a reference pixel region in the pixel region;
- and
- a controller that controls a convergence time for the clamp processor to clamp an output signal of the second pixel row to a reference level and a convergence time for the clamp processor to clamp an output signal of the first pixel row to a reference level to be different from each other.
An imaging apparatus comprising:
- a pixel region configured of a light-shielded region and an opening region, the light-shielded region and the opening region each including a plurality of unit pixels, each of which includes a plurality of photoelectric conversion portions, in a matrix form;
- and
- a driving unit that performs driving so that a composite signal of a plurality of photoelectric conversion portions of each unit pixel is read out in a first pixel row in the light-shielded region, and perform driving so that a signal of a part of photoelectric conversion portions of each unit pixel is separately read out in a second pixel row different from the first pixel row in the light-shielded region.
A control method of an imaging apparatus including a pixel region having a plurality of unit pixels, each of which includes a plurality of photoelectric conversion portions, in a matrix form, the control method comprising:
- reading out, by a readout controller, a signal of a part of photoelectric conversion portions in a unit pixel in a light-shielded region of the pixel region, reading out a composite signal of all of photoelectric conversion portions in a different unit pixel in the light-shielded region, reading out a signal of a part of photoelectric conversion portions in a unit pixel in an opening region of the pixel region, and reading out a composite signal of all of photoelectric conversion portions in a different unit pixel in the opening region;
- and
- correcting, by a clamp processor, the composite signal of all of the photoelectric conversion portions of the unit pixel in the opening region based on a result of multiplication in which an error amount between the composite signal of all of the photoelectric conversion portions of the unit pixel in the light-shielded region and a clamp level is multiplied by a first feedback gain, and correcting the signal of the part of the photoelectric conversion portions in the unit pixel in the opening region based on a result of multiplication in which an error amount between the signal of the part of the photoelectric conversion portions of the unit pixel in the light-shielded region and the clamp level is multiplied by a second feedback gain.
A control method of an imaging apparatus including a pixel region in which a plurality of unit pixels each of which includes a plurality of photoelectric conversion portions is arranged in a matrix form, the control method comprising:
- performing driving so that a composite signal of a plurality of photoelectric conversion portions of each unit pixel is read out in a first pixel row in the pixel region, and performing driving so that a signal of a part of photoelectric conversion portions of each unit pixel is separately read out in a second pixel row different from the first pixel row in the pixel region, by a driving unit;
- clamping an output signal of a valid pixel region to a reference level based on an output signal of a reference pixel region of the pixel region by a clamp processor;
- and
- controlling, by a controller, a convergence time for the clamp processor to clamp the output signal of the second pixel row to a reference level and a convergence time for the clamp processor to clamp the output signal of the first pixel row to a reference level to be different from each other.
A control method of an imaging apparatus including a pixel region configured of a light-shielded region and an opening region, the light-shielded region and the opening region each including a plurality of unit pixels, each of which includes a plurality of photoelectric conversion portions, in a matrix form, the control method comprising:
- performing driving so that a composite signal of a plurality of photoelectric conversion portions of each unit pixel is read out in a first pixel row in the light-shielded region, and performing driving so that a signal of a part of photoelectric conversion portions of each unit pixel is separately read out in a second pixel row different from the first pixel row in the light-shielded region, by a driving unit.
Dependencies are inferred from the claim text.