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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(shù)領(lǐng)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

As described above, the photoelectric conversion device according to the present embodiment is an area sensor including a plurality of pixels P arranged in a matrix inside the pixel region 10. In the present embodiment, an example in which a focus detection device used for performing autofocusing by phase difference detection is formed by using such an area sensor will be illustrated.

In a phase difference detection-type focus detection device, the pixel region 10 used for acquiring image data includes a reference part and a comparison part having an arbitrary size. Further, a correlation operation between image data output from the reference part and image data output from the comparison part is performed to calculate a phase shift amount therebetween, and a distance to an object is measured by using the principle of triangulation. The reference part and the comparison part are paired regions. Therefore, data output from the reference part and the comparison part is paired image data.

In the photoelectric conversion device according to the present embodiment, as illustrated in FIG. 3, two sets of a pair of the reference part and the comparison part are defined within the pixel region 10. That is, a reference part 101 and a comparison part 102 arranged in the first direction are defined as a first pair. Further, a reference part 103 and a comparison part 104 arranged in the second direction are defined as a second pair.

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