Imaging unit, imaging apparatus, and computer readable medium storing thereon an imaging control program
When the amplification ratio is low and strong incident light causes a large charge, the signal retrieved from regions where the incident light is weak is also weak, but when the amplification ratio is high in regions where the incident light is weak, the signal retrieved from regions where the incident light is strong becomes saturated. Therefore, the dynamic range of the imaging unit is narrow. Provided is an imaging unit comprising an imaging section that includes a first group having one or more pixels and a second group having one or more pixels different from those of the first group; and a control section that, while a single charge accumulation is performed in the first group, causes pixel signals to be output by performing charge accumulation in the second group a number of times differing from a number of times charge accumulation is performed in the first group.
1. An imaging sensor comprising:
a plurality of pixels arranged side-by-side in a row direction and a column direction;
a first control wire, through which a first control signal for controlling a first pixel among the plurality of pixels is output, that is connected to the first pixel;
a second control wire, through which a second control signal for controlling a second pixel among the plurality of pixels is output, that is connected to the second pixel, the second pixel arranged to a side of the first pixel in the row direction;
a first conversion section for converting a first signal retrieved from the first pixel into a digital signal; and
a second conversion section for converting a second signal retrieved from the second pixel into a digital signal.
2. The imaging sensor according to claim 1 ,
wherein
the first pixel includes a first photoelectric converting section that converts light into charge,
the second pixel includes a second photoelectric converting section that converts light into charge,
at least the first photoelectric converting section for the first pixel and at least the second photoelectric converting section for the second pixel are disposed on an imaging chip to which light is incident, and
at least some circuitry of the first conversion section and at least some circuitry of the second conversion section are disposed on a signal processing chip connected to the imaging chip.
3. The imaging sensor according to claim 2 , further comprising
a first storing section that stores the first signal that has been converted into a digital signal by the first conversion section; and
a second storing section that stores the second signal that has been converted into a digital signal by the second conversion section.
4. The imaging sensor according to claim 3 , wherein
at least some circuitry of the first storing section and at least some circuitry of the second storing section are disposed on a memory chip connected to the signal processing chip.
5. The imaging sensor according to claim 1 , wherein
the first pixel includes
a first photoelectric converting section that converts light into charge, and
a first transfer section that transfers charge converted by the first photoelectric converting section, and that is connected to the first control wire, and
the second pixel includes
a second photoelectric converting section that converts light into charge, and
a second transfer section that transfers charge converted by the second photoelectric converting section, and that is connected to the second control wire,
the first transfer section transfers charge of the first photoelectric converting section based on the first control signal outputted to the first control wire, and
the second transfer section transfers charge of the second photoelectric converting section based on the second control signal outputted to the second control wire.
6. The imaging sensor according to claim 5 ,
wherein
at least the first photoelectric converting section for the first pixel and at least the second photoelectric converting section for the second pixel are disposed on an imaging chip to which light is incident, and
at least some circuitry of the first conversion section and at least some circuitry of the second conversion section are disposed on a signal processing chip connected to the imaging chip.
7. The imaging sensor according to claim 6 , further comprising
a first storing section that stores the first signal that has been converted into a digital signal by the first conversion section; and
a second storing section that stores the second signal that has been converted into a digital signal by the second conversion section.
8. The imaging sensor according to claim 7 , wherein
at least some circuitry of the first storing section and at least some circuitry of the second storing section are disposed on a memory chip connected to the signal processing chip.
9. The imaging sensor according to claim 1 , wherein
the first pixel includes
a first photoelectric converting section that converts light into charge,
a first floating diffusion to which charge of the first photoelectric converting section is transferred, and
a first reset section that is connected to the first control wire, and that resets potential of the first floating diffusion,
the second pixel includes
a second photoelectric converting section that converts light into charge,
a second floating diffusion to which charge of the second photoelectric converting section is transferred, and
a second reset section that is connected to the second control wire, and that resets potential of the second floating diffusion,
the first reset section resets potential of the first floating diffusion based on the first control signal, and
the second reset section resets potential of the second floating diffusion based on the second control signal.
10. The imaging sensor according to claim 9 ,
wherein
at least the first photoelectric converting section for the first pixel and at least the second photoelectric converting section for the second pixel are disposed on an imaging chip to which light is incident, and
at least some circuitry of the first conversion section and at least some circuitry of the second conversion section are disposed on a signal processing chip connected to the imaging chip.
11. The imaging sensor according to claim 10 , further comprising
a first storing section that stores the first signal that has been converted into a digital signal by the first conversion section; and
a second storing section that stores the second signal that has been converted into a digital signal by the second conversion section.
12. The imaging sensor according to claim 11 , wherein
at least some circuitry of the first storing section and at least some circuitry of the second storing section are disposed on a memory chip connected to the signal processing chip.
13. The imaging sensor according to claim 1 , further comprising
a third control wire, through which a third control signal for controlling the first pixel is output, that is connected to the first pixel; and
a fourth control wire, through which a fourth control signal for controlling the second pixel is output, that is connected to the second pixel.
14. The imaging sensor according to claim 13 , wherein
the first pixel includes
a first photoelectric converting section that converts light into charge,
a first transfer section that transfers charge converted by the first photoelectric converting section, and that is connected to the first control wire,
a first floating diffusion to which charge of the first photoelectric converting section is transferred, and
a first reset section that is connected to the third control wire, and that resets potential of the first floating diffusion, and
the second pixel includes
a second photoelectric converting section that converts light into charge,
a second transfer section that transfers charge converted by the second photoelectric converting section, and that is connected to the second control wire,
a second floating diffusion to which charge of the second photoelectric converting section is transferred, and
a second reset section that is connected to the fourth control wire, and that resets potential of the second floating diffusion, wherein
the first transfer section transfers charge of the first photoelectric converting section based on the first control signal,
the second transfer section transfers charge of the second photoelectric converting section based on the second control signal,
the first reset section resets potential of the first floating diffusion based on the third control signal, and
the second reset section resets potential of the second floating diffusion based on the fourth control signal.
15. The imaging sensor according to claim 14 ,
wherein
at least the first photoelectric converting section for the first pixel and at least the second photoelectric converting section for the second pixel are disposed on an imaging chip to which light is incident, and
at least some circuitry of the first conversion section and at least some circuitry of the second conversion section are disposed on a signal processing chip connected to the imaging chip.
16. The imaging sensor according to claim 15 , further comprising
a first storing section that stores the first signal that has been converted into a digital signal by the first conversion section; and
a second storing section that stores the second signal that has been converted into a digital signal by the second conversion section.
17. The imaging sensor according to claim 16 , wherein
at least some circuitry of the first storing section and at least some circuitry of the second storing section are disposed on a memory chip connected to the signal processing chip.
18. An electronic device comprising:
the imaging sensor of claim 1 ; and
a control section that controls the imaging sensor.
19. The electronic device according to claim 18 , wherein
the control section controls a timing at which the first control signal is outputted to the first control wire and a timing at which the second control signal is outputted to the second control wire.
20. An electronic device comprising:
the imaging sensor of claim 14 ; and
a control section that controls the imaging sensor, wherein
the control section controls a timing at which the first control signal is outputted to the first control wire, a timing at which the second control signal is outputted to the second control wire, a timing at which the third control signal is outputted to the third control wire, and a timing at which the fourth control signal is outputted to the fourth control wire.