Patent ID: 8786746

Claim:
A solid-state image pickup device comprising: a pixel array unit including unit pixels which are two-dimensionally arranged in a matrix pattern, each unit pixel including a photoelectric converter, and column signal lines corresponding to respective columns of the matrix pattern; a row scanning unit selectively controlling each unit pixel of the pixel array unit in units of rows; a pair of column processing units, each including a plurality of analog-digital converting units, each converting an analog signal output from a respective one of the unit pixels in each row selectively-controlled by the row scanning unit through the column signal lines to a respective digital signal; a pair of column scanning units controlling output of the digital signals from the respective analog-digital converting units, a first portion of the unit pixels and their analog-digital converting units associated with one of the column scanning units, a second portion of the unit pixels and their analog-digital converting units associated with the other of the column scanning units; respective selecting switches between the pixel array unit and the column scanning units, wherein each of the selecting switches operate in a complimentary manner so as to connect one of two adjoining column signal lines to a first one of the column processing units when the other of the two adjoining column signal lines is connected to a second one of the column processing units; a respective pair of output lines for transmitting the digital signals output from the analog-digital converting units under control by the column scanning units; and a digital adder unit to which the output lines are connected and which adds together digital signals output from the column processing units, wherein only digital signals for pixels associated with one color are added together.