Photoelectric conversion device

A photoelectric conversion device comprising:

• a plurality of microlenses arranged so as to form a plurality of rows and a plurality of columns;
• and
• a pixel array including a plurality of unit pixels arranged corresponding to the plurality of microlenses, respectively,
• wherein each of the plurality of unit pixels includes a first photoelectric conversion unit and a second photoelectric conversion unit,
• wherein reading from the pixel array is performed in a first mode in which a signal based on charges obtained by adding a charge generated in the first photoelectric conversion unit and a charge generated in the second photoelectric conversion unit is read, and a second mode in which a signal based on a charge generated in any one of the first photoelectric conversion unit and the second photoelectric conversion unit is read, and then a signal based on charges obtained by adding a charge generated in the first photoelectric conversion unit and a charge generated in the second photoelectric conversion unit is read,
• wherein reading control is performed on the pixel array, the pixel array being divided into a plurality of regions including a first region, a second region, and a third region arranged between the first region and the second region,
• wherein reading from unit pixels of all rows included in the first region is performed in the first mode,
• wherein reading from unit pixels of all rows included in the second region is performed in the second mode, and
• wherein reading from unit pixels of some rows included in the third region is performed in the first mode, and reading from unit pixels of other rows is performed in the second mode.