Image signal processing circuit and imaging unit using the same

摘要

A first solid state imaging device ( 20 a) captures a first picture of a subject to generate a first image signal Ya(t). A second solid state imaging device ( 20 b) captures a second picture of the subject to generate a second image signal Yb(t). In synchronization with operation of the first and second solid state imaging devices ( 20 a , 20 b), a selection circuit ( 26 ) alternately selects one of the first and second image signals Ya(t) and Yb(t) to output a selected image signal. A digital processing circuit ( 29 ) includes a first register ( 33 a) that stores first exposure data EDa generated in accordance with the first image signal Ya(t), and includes a second register ( 33 b) that stores second exposure data EDb generated in accordance with the second image signal Yb(t). This enables smooth switching of operation between the solid state imaging devices.