Patent ID: 7671316

Claim:
A driving method of a camera system, the camera system having: an imaging device; an optical system operable to lead incident light to an imaging part of the imaging device; and a signal processing circuit operable to process an output signal of the imaging device, wherein the imaging device comprises: a pixel array part in which a plurality of pixels with different characteristics of spectral sensitivity are arranged in an array and which converts light transmitted through the pixel into an electric signal, said pixel array part comprising a plurality of color pixels and at least one clear pixel, wherein the plurality of color pixels comprises (i) a first color filter pixel having a peak of spectral sensitivity characteristics in red, (ii) a second color filter pixel having a peak in blue, and (iii) a third color filter pixel having a peak in green, at least a portion of the plurality of color filter pixels is arranged in an oblique pixel array system, at least one clear pixel having a high transmittance is arranged in the oblique pixel array system at a given position of a given row and a given column with respect to the first color filter pixel, the second color filter pixel, and the third color filter pixel, and a first read channel is exclusively coupled to the at least one clear pixel and a second read channel is exclusively coupled to the plurality of color filter pixels, the method comprising the step of: separately performing electronic shutter drive for the at least one clear pixel and for the plurality of color filter pixels and separately changing, for the at least one clear pixel and for the plurality of color filter pixels, at least one of time period, rate and gain in processing.