An imaging device, comprising:
- a plurality of first pixels, each first pixel including a first photoelectric conversion unit which converts light into electric charge, a first transfer unit which transfers the electric charge of the first photoelectric conversion unit to a first floating diffusion region, and a first output unit which outputs to a first signal line a first signal generated from the electric charge transferred to the first floating diffusion region from the first photoelectric conversion unit by the first transfer unit;
- a plurality of second pixels, each second pixel including a second photoelectric conversion unit which converts light into electric charge, a second transfer unit which transfers the electric charge of the second photoelectric conversion unit to a second floating diffusion region, and a second output unit which outputs to a second signal line a second signal generated from the electric charge transferred to the second floating diffusion region from the second photoelectric conversion unit by the second transfer unit;
- a signal processing unit having a terminal being input the first signal output to the first signal line and the second signal output to the second signal line and performing signal processing on the first signal and the second signal input to the terminal;
- a first controlling unit, disposed between the first signal line and the terminal, causing the first signal line and the terminal to be non-conductive;
- a second controlling unit, disposed between the second signal line and the terminal, causing the second signal line and the terminal to be non-conductive;
- a first voltage adjusting unit, connected between the first pixel and the first controlling unit in the first signal line, adjusting a voltage of the first signal line not to become a predetermined value or less;
- a second voltage adjusting unit, connected between the second pixel and the second controlling unit in the second signal line, adjusting a voltage of the second signal line not to become the predetermined value or less;
- and
- a controlling circuit controlling each of the first controlling unit, the second controlling unit, the first voltage adjusting unit, and the second voltage adjusting unit, wherein
- the controlling circuit controls
- the first controlling unit in order to cause the first signal line and the terminal to be non-conductive in a period in which the electric charge is transferring to the first floating diffusion region from the first photoelectric conversion unit by the first transfer unit,
- the second controlling unit in order to cause the second signal line and the terminal to be non-conductive in a period in which the electric charge is transferring to the second floating diffusion region from the second photoelectric conversion unit by the second transfer unit,
- the first voltage adjusting unit in order for the voltage of the first signal line not to become the predetermined value or less in a period in which the first signal line and the terminal are to be non-conductive by the first controlling unit, and
- the second voltage adjusting unit in order for the voltage of the second signal line not to become the predetermined value or less in a period in which the second signal line and the terminal are to be non-conductive by the second controlling unit;
- the first voltage adjusting unit includes a first clipping circuit being connected to the first signal line and adjusting the voltage of the first signal line not to become the predetermined value or less and includes a second clipping circuit being connected to the first signal line and adjusting the voltage of the first signal line not to become the predetermined value or less;
- the second voltage adjusting unit includes a third clipping circuit being connected to the second signal line and adjusting the voltage of the second signal line not to become the predetermined value or less and includes a fourth clipping circuit being connected to the second signal line and adjusting the voltage of the second signal line not to become the predetermined value or less;
- a first pixel connected to the first signal line and adjusted by the first clipping circuit in order for the voltage of the first signal line not to become the predetermined value or less is different from another first pixel connected to the first signal line and adjusted by the second clipping circuit in order for the voltage of the first signal line not to become the predetermined value or less;
- a second pixel connected to the second signal line and adjusted by the third clipping circuit in order for the voltage of the second signal line not to become the predetermined value or less is different from another second pixel connected to the second signal line and adjusted by the fourth clipping circuit in order for the voltage of the second signal line not to become the predetermined value or less;
- the first clipping circuit is located on the first signal line between a point where an output of the first pixel adjusted by the first clipping circuit is connected to the first signal line and a point where a first constant current source is connected to the first signal line;
- the second clipping circuit is located on the first signal line between a point where an output of the another first pixel adjusted by the second clipping circuit is connected to the first signal line and a point where a second constant current source is connected to the first signal line;
- the third clipping circuit is located on the second signal line between a point where an output of the second pixel adjusted by the third clipping circuit is connected to the second signal line and a point where a third constant current source is connected to the second signal line;
- and
- the fourth clipping circuit is located on the second signal line between a point where an output of the another second pixel adjusted by the fourth clipping circuit is connected to the second signal line and a point where a fourth constant current source is connected to the second signal line.