Patent Number: 7,132,705

Title: Solid state imaging device and method of driving the same

Abstract: A solid state imaging device including: a photoelectric conversion element generating photo-generated charges corresponding to incident light; an accumulation well accumulating photo-generated charges; a modulation well storing photo-generated charges from the accumulation well; a modulation transistor whose channel threshold voltage is controlled by the stored photo-generated charges and that outputs a pixel signal corresponding to the photo-generated charges; a transfer control element changing the potential barrier of a transfer channel between the accumulation well and the modulation well to control transfer of the photo-generated charges; and an unwanted charges discharge control element controlling the potential barrier of an unwanted charges discharge channel coupled to the accumulation well, and discharging charges which overflow from the accumulation well through the unwanted charges discharge channel during all periods other than the transfer period when photo-generated charges are transferred from the accumulation well to the modulation well.

Inventors: Kuwazawa; Kazunobu (Chino, JP)

Assignee: Seiko Epson Corporation

International Classification: H01L 27/00 (20060101); H01L 31/062 (20060101); H04N 3/14 (20060101)

Expiration Date: 2019-11-07 0:00:00