US Patent No. 9,502,452

IMAGE PICKUP APPARATUS, IMAGE PICKUP SYSTEM, AND IMAGE PICKUP APPARATUS DRIVING METHOD


Patent No. 9,502,452
Issue Date November 22, 2016
Title Image Pickup Apparatus, Image Pickup System, And Image Pickup Apparatus Driving Method
Inventorship Masahiro Kobayashi, Tokyo (JP)
Yuichiro Yamashita, Hsinchu (TW)
Ginjiro Toyoguchi, Tokyo (JP)
Assignee CANON KABUSHIKI KAISHA, Tokyo (JP)

Claim of US Patent No. 9,502,452

1. An image pickup apparatus comprising:
a plurality of pixels, each of the plurality of pixels including
a photoelectric conversion unit;
a first holding unit configured to hold a charge generated by the photoelectric conversion unit, at a location different from
location of the photoelectric conversion unit;

a second holding unit configured to hold a charge held by the first holding unit at a location different from locations of
both of the first holding unit and the photoelectric conversion;

an amplifying unit including an input node and configured to output a signal based on a charge transferred to the input node
from the second holding unit, the input node being a different node from the second holding unit;

a reset unit configured to reset a voltage of the input node; and
a first discharge unit configured to discharge a charge of the first holding unit,
wherein the first discharge unit includes a charge draining node,
wherein the charge draining node is electrically connected to a line to which a predetermined voltage is to be supplied,
wherein the first discharge unit is configured to discharges a charge held by the first holding unit to the charge draining
node,

wherein the reset unit is configured to discharge a charge of the second holding unit via the input node, and
wherein each of the plurality of pixels includes a third transfer unit configured to transfer a charge from the second holding
unit to the input node.