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Photoelectric conversion device and method of driving photoelectric conversion device

專利號
US11039057B2
公開日期
2021-06-15
申請人
CANON KABUSHIKI KAISHA（JP Tokyo）
發(fā)明人
Kei Ochiai
IPC分類
H04N5/232
技術領域
readout,pixel,row,pixels,signal,in,th,circuit,control,conversion
地域： Tokyo

摘要

A photoelectric conversion device includes a pixel region where pixels are arranged to form rows and columns, and a pixel control circuit that supplies control signals to the pixels. The pixel region includes first to fourth regions, a first pixel in the first region and a second pixel in the second region are arranged on different columns on a first row, a third pixel in the third region and a fourth pixel in the fourth region are arranged on different rows on a first column, and the first row on which the first and second pixels are arranged is arranged between rows on which the third and fourth pixels are arranged. The pixel control circuit simultaneously reads out pixel signals of the first and second pixels in a first period and simultaneously reads out pixel signals of the third and fourth pixels in a second period.

說明書

At this time, since the pattern noise described above is generated in the horizontal direction, the same amount of noise is superimposed on image data of the reference part 101 and image data of the comparison part 102 arranged in the horizontal direction. Therefore, when a correlation operation between the image data of the reference part 101 and the image data of the comparison part 102 is performed, noise components superimposed on the image data are cancelled and do not affect the result of the correlation operation.

However, since readout is performed at a different timing for the reference part 103 and the comparison part 104 arranged in the vertical direction, different amounts of noise may be superimposed on image data of the reference part 103 and image data of the comparison part 104. In such a case, the accuracy of a correlation operation between image data of the reference part 103 and image data of the comparison part 104 is reduced, and thereby the accuracy of focusing in autofocusing is reduced.

權利要求

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