TECHNICAL FIELD

The present invention relates to an image sensor and to an imaging device.

BACKGROUND ART

An image sensor is per se known that reads out signals produced by a plurality of photoelectric conversion units, from pixels that incorporate that plurality of photoelectric conversion units and a plurality of floating diffusion units (refer to PTL1). In the prior art, each of the plurality of photoelectric conversion units is connected to a corresponding one of the plurality of floating diffusion units.

CITATION LIST

Patent Literature

PTL1: Japanese Laid-Open Patent Publication No. 2016-127454.

SUMMARY OF INVENTION

According to the 1st aspect of the present invention, an image sensor comprises: a first pixel and a second pixel, each of which comprises a first photoelectric conversion unit that photoelectrically converts light that has passed through a micro lens and generates a first charge, a second photoelectric conversion unit that photoelectrically converts light that has passed through the micro lens and generates a second charge, an accumulation unit that accumulates at least one of the first charge and the second charge, a first transfer unit that transfers the first charge to the accumulation unit, and a second transfer unit that transfers the second charge to the accumulation unit; and a control unit that outputs, to the first transfer unit of the first pixel and to the second transfer unit of the second pixel, a signal that causes the first charge of the first pixel and the second charge of the second pixel to be transferred to their accumulation units.

According to the 2nd aspect of the present invention, an imaging device comprises: an image sensor according to the 1st aspect that captures an image formed by an optical system comprising a focus adjustment optical system; and a position control unit that controls a position of the focus adjustment optical system based upon a signal based upon a first charge and a signal based upon a second charge outputted respectively from the first pixel and from the second pixel of the image sensor, so that an image formed by the optical system is focused upon the image sensor.

According to the 3rd aspect of the present invention, an imaging device comprises: an image sensor according to the 1st aspect that captures an image formed by an optical system comprising a focus adjustment optical system; and a position control unit that controls a position of the focus adjustment optical system based upon at least one set of a signal based upon the first charge of the first pixel and a signal based upon the second charge of the second pixel, and a signal based upon the second charge of the first pixel and a signal based upon the first charge of the second pixel, outputted from the image sensor, so that an image formed by the optical system is focused upon the image sensor.

