Patent ID: 8502886

Claim:
A solid-state image sensing device comprising: a pixel section having photodiodes two-dimensionally arrayed on a semiconductor substrate, a reading circuit which reads out signal charges from the photodiodes to detectors, an output circuit which outputs charges from the detectors, and a reset which resets the detectors, an exposure time control circuit which controls an exposure time during which the photodiode performs photoelectric conversion, a column amplifying circuit which amplifies a signal output from the output circuit, an A/D conversion circuit which A/D-converts a signal amplified by the column amplifying circuit, a plurality of line memories which store signals converted by the A/D conversion circuit, and a signal processing circuit which processes a plurality of output signals from the plurality of line memories, wherein a signal stored in the photodiode is read out by the reading circuit divisionally by a plurality of number of times, the column amplifying circuit changes the amplification factor to amplify a signal output from the output circuit, the signal is A/D-converted by the A/D conversion circuit by a plurality of number of times, and the signal A/D-converted by a plurality of number of times is stored in the plurality of line memories, and the signal processing circuit controls the amplification factor of a signal amplifying circuit in accordance with that of the column amplifying circuit in order to adjust a plurality of output signals simultaneously read out from the plurality of line memories to have the same gradient, and comprises a linear conversion/synthesizing circuit which linearly converts optical input signal amounts to have the same gradient, and synthesizing them into one signal by a switching circuit.