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Photoelectric conversion device and method of driving photoelectric conversion device

專利號(hào)
US11039057B2
公開(kāi)日期
2021-06-15
申請(qǐng)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(shuō)明書(shū)

During the period from time T21 to time T22, the pixel control circuit 20 controls the control signal pSEL2 supplied to the control line 14 on the b-th column to the high level. Thereby, the select transistors M6 of the pixels P belonging to the b-th column are turned on, and the pixels P belonging to the b-th column are selected. That is, the pixels P belonging to the b-th column are ready for outputting pixel signals to the readout circuit 50 via the output lines 18 on the corresponding rows.

A period in which the control signal pRES is at the high level out of the period from time T21 to time T22 of FIG. 5 is a reset period for the floating diffusion portion FD. Further, the period in which the control signal pTX2 is at the high level corresponds to the period from time T2 to time T3 of FIG. 4 and is a transfer period for charge from the charge holding portion MEM to the floating diffusion portion FD. Pixel signals read out to the output lines 18 between the reset period and the transfer period are noise signals in accordance with a reset voltage of the floating diffusion portion FD. Further, pixel signals read out after the transfer period to the output lines 18 are light signals in accordance with the amount of charge generated in the photoelectric converter PD.

A noise signal and a light signal read out from the pixels P belonging to the b-th column to the readout circuit 50 are differentially processed in the CDS circuit provided in the readout circuit 50 to form image data on the b-th column.

權(quán)利要求

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