Patent ID: 8736732
Filing Date: 2014-05-27
Classification: H03M,H04N

Abstract:
1. A solid-state image pickup device comprising: an image unit, in which a plurality of pixels each including a photoelectric conversion element for converting an optical signal into an electrical signal are arranged in a matrix, for sequentially scanning pixels in each row and outputting pixel signals of a selected row through a plurality of vertical readout lines arranged in respective columns; a plurality of holding units configured to hold pixel signals outputted through the vertical readout lines; a plurality of conversion units, provided corresponding to the respective holding unit, each configured to convert a pixel signal held by corresponding holding unit from an analog signal to a digital value; a first generation unit configured to generate first part bits of the digital value in accordance with the pixel signal held by the holding unit; and a second generation unit configured to generate second part bits of the digital value in accordance with the pixel signal held by the holding unit and the first part bits generated by the first generation unit, wherein each of the conversion units includes: the comparison unit compares the potential of the node with a predetermined potential and the second generation unit includes: