Solid-state imaging device and signal processing circuit

摘要

A solid-state imaging device includes a semiconductor substrate having a principal surface, and three or more pixel regions formed in at least one direction of two different directions along the principal surface of the semiconductor substrate. Each pixel region includes a plurality of photoelectric conversion regions having different sensitivities. The photoelectric conversion region having the highest sensitivity in peripheral pixel regions of the pixel regions has a higher sensitivity than the photoelectric conversion region having the highest sensitivity in a central pixel region of the pixel regions.

主权项

1. A solid-state imaging device comprising:
a semiconductor substrate having a surface; three or more pixel regions formed in at least one direction of two different directions along the principal surface of the semiconductor substrate, the three or more pixel regions comprising a central pixel region and peripheral pixel regions around the central pixel region, each pixel region including a plurality of photoelectric conversion regions having different sensitivities, wherein the photoelectric conversion region having the highest sensitivity in the peripheral pixel regions has a higher sensitivity than the photoelectric conversion region having the highest sensitivity in the central pixel region; and a signal processing circuit configured to process a signal that is photoelectrically converted by the pixel regions, the signal processing circuit being included in or being external to the solid-state imaging device, wherein the signal processing circuit corrects for gains of the central pixel region and the peripheral pixel regions in accordance with an f value and corrects for shading that is caused in a region other than the photoelectric conversion regions having the highest sensitivity in the pixel regions, and the signal processing circuit includes:
a multiplying circuit that multiplies a signal output from the region other than the photoelectric conversion regions having the highest sensitivity in the pixel regions or a signal obtained by performing signal processing on the output signal by a coefficient that is determined for each of the pixel regions; andan adding circuit that adds the signal output from the region other than the photoelectric conversion regions having the highest sensitivity in the pixel regions or the signal obtained by performing signal processing on the output signal to the signal multiplied by the coefficient.