Patent ID: 7417212
Filing Date: 2008-08-26
Classification: H01L,H04N

Abstract:
1. A solid-state image-sensing device comprising: a pixel circuit, wherein the pixel circuit comprises: wherein, for acquisition of sensed-image data, the photoelectric converter disconnecting switch is turned on to make the forcible reset switch perform resetting, then a voltage at an end of the logarithmic conversion MOS transistor that is not connected to the photoelectric converter disconnecting switch is so controlled that the logarithmic conversion MOS transistor is reset according to a threshold voltage thereof, and then an output commensurate with an amount of light incident on the photoelectric converter is delivered, and wherein, for acquisition of noise data, the photoelectric converter disconnecting switch is turned on to make the forcible reset switch perform resetting, then the photoelectric converter disconnecting switch is turned off, then the voltage at the end of the logarithmic conversion MOS transistor that is not connected to the photoelectric converter disconnecting switch is so controlled that the logarithmic conversion MOS transistor is reset according to the threshold voltage thereof, and then an output unrelated to the amount of light incident on the photoelectric converter is delivered; and wherein an operation for acquiring a plurality of frames worth of sensed-image data and an operation for acquiring one frame worth or a plurality of frames worth of noise data are performed alternately.