Detection device and electronic equipment
The present disclosure relates to a detection device and electronic equipment, in which a detection accuracy of minute light can be improved. A detection device includes: a pixel array portion in which a plurality of first pixels including a photoelectric conversion unit, and a plurality of second pixels not including a photoelectric conversion unit, are arranged; and a driving unit configured to drive the first pixel and the second pixel. The present technology, for example, can be applied to a light detector, a radiation counter device performing radiation counting by using the light detector, and a biological examination device using the light detector, such as a flow cytometer.
1. A detection device, comprising:
a pixel array portion in which a plurality of first pixels including a photoelectric conversion unit, and a plurality of second pixels not including a photoelectric conversion unit, are arranged;
a driving unit configured to drive the first pixels and the second pixels; and
a detection unit configured to perform sampling of a reset signal indicating a reset level of the first pixels, an accumulation signal indicating an accumulated charge amount, and a replica signal, the replica signal being a signal of the second pixels,
wherein the driving unit performs a first driving of driving the first pixels and the second pixels such that a timing for sampling the reset signal of a first pixel group including the plurality of first pixels, is matched to a timing for sampling a first replica signal of a second pixel group including the plurality of second pixels, and a timing for sampling the accumulation signal of the first pixel group, is matched to a timing for sampling a second replica signal of the second pixel group, and
wherein the driving unit is capable of switching the first driving to a second driving of driving the first pixels and the second pixels such that the second pixels are fixed to be in a non-selected state, the sampling of the reset signal and the accumulation signal of each of the first pixels is performed in a predetermined order, and a timing for sampling the accumulation signal of one of a third pixel group and a fourth pixel group, and a timing for sampling the reset signal of the other of the third pixel group and the fourth pixel group, back and forth in a sampling order, are matched to each other.
2. The detection device according to claim 1 , wherein the second pixels are arranged in a region in which the first pixels are arranged.
3. The detection device according to claim 2 , wherein the second pixels are arranged between adjacent first pixels in a row in which the first pixels perform sampling at a same time are arranged.
4. The detection device according to claim 3 ,
wherein a control line of supplying a first selection signal for selecting the first pixels in the row, is different from a control line of supplying a second selection signal for selecting the second pixels in the row.
5. The detection device according to claim 2 ,
wherein the second pixels include a transfer transistor that is constantly turned off.
6. The detection device according to claim 1 , wherein the second pixels are arranged out of a region in which the first pixels are arranged.
7. The detection device according to claim 6 ,
wherein the each of the second pixels includes:
a first transistor corresponding to an amplification transistor of each of the first pixels; and
a second transistor corresponding to a selection transistor of each of the first pixels, and
a predetermined voltage is applied to a gate of the first transistor.
8. The detection device according to claim 1 ,
wherein the driving unit drives the first pixels and the second pixels such that sampling is performed in a unit of a predetermined number of rows of the pixel array portion, and
the first pixel group includes the first pixels in the predetermined number of rows, and the second pixel group includes the second pixels in the predetermined number of rows.
9. The detection device according to claim 1 , further comprising:
an output control unit configured to generate a first differential signal based on a difference between the accumulation signal and the reset signal of one or the plurality of first pixels, and a second differential signal based on a difference between the second replica signal and the first replica signal of one or the plurality of second pixels.
10. The detection device according to claim 9 ,
wherein the output control unit generates a third differential signal based on a difference between the first differential signal and the second differential signal.
11. The detection device according to claim 1 , wherein each of the second pixels is provided at a location further remote from the detection unit than the first pixels in a vertical direction.
12. Electronic equipment, comprising:
a detection device; and
a signal processing unit configured to process a signal of the detection device,
wherein the detection device includes:
a pixel array portion in which a plurality of first pixels including a photoelectric conversion unit, and a plurality of second pixels not including a photoelectric conversion unit, are arranged;
a driving unit configured to drive the first pixels and the second pixels; and
a detection unit configured to perform sampling of a reset signal indicating a reset level of the first pixels, an accumulation signal indicating an accumulated charge amount, and a replica signal, the replica signal being a signal of the second pixels,
wherein the driving unit performs a first driving of driving the first pixels and the second pixels such that a timing for sampling the reset signal of a first pixel group including the plurality of first pixels, is matched to a timing for sampling a first replica signal of a second pixel group including the plurality of second pixels, and a timing for sampling the accumulation signal of the first pixel group, is matched to a timing for sampling a second replica signal of the second pixel group, and
wherein the driving unit is capable of switching the first driving to a second driving of driving the first pixels and the second pixels such that the second pixels are fixed to be in a non-selected state, the sampling of the reset signal and the accumulation signal of each of the first pixels is performed in a predetermined order, and a timing for sampling the accumulation signal of one of a third pixel group and a fourth pixel group and a timing for sampling the reset signal of the other of the third pixel group and the fourth pixel group, back and forth in a sampling order, are matched to each other.
13. The electronic equipment according to claim 12 , wherein the second pixels are arranged between adjacent first pixels in a row in which the first pixels perform sampling at a same time are arranged.
14. The electronic equipment according to claim 12 , wherein the second pixels are arranged out of a region in which the first pixels are arranged.
15. The electronic equipment according to claim 12 , wherein each of the second pixels is provided at a location further remote from the detection unit than the first pixels in a vertical direction.
16. A detection device, comprising:
a pixel array portion in which a plurality of pixels is arranged;
a detection unit configured to perform sampling of a reset signal indicating a reset level of each of the pixels, and an accumulation signal indicating an accumulated charge amount; and
a driving unit configured to drive the pixels such that the sampling of the reset signal and the accumulation signal of each of the pixels is performed in a predetermined order, and a timing for sampling the accumulation signal of one of a first pixel group and a second pixel group, and a timing for sampling the reset signal of the other of the first pixel group and the second pixel group, back and forth in a sampling order, are matched to each other.
17. The detection device according to claim 16 ,
wherein a number of pixels of the first pixel group is approximately identical to a number of pixels of the second pixel group.
18. The detection device according to claim 17 ,
wherein the driving unit drives the pixels such that sampling of a signal of each of the pixels is performed in a unit of a predetermined number of rows, and
the number of rows of the first pixel group is identical to the number of rows of the second pixel group.
19. The detection device according to claim 16 , further comprising:
an output control unit configured to generate a differential signal based on a difference between the accumulation signal and the reset signal of one or the plurality of pixels.
20. Electronic equipment, comprising:
a detection device; and
a signal processing unit configured to process a signal of the detection device,
wherein the detection device includes:
a pixel array portion in which a plurality of pixels is arranged;
a plurality of detection units configured to perform sampling of a reset signal indicating a reset level of each of the pixels, and an accumulation signal indicating an accumulated charge amount; and
a driving unit configured to drive the pixels such that the sampling of the reset signal and the accumulation signal of each of the pixels is performed in a predetermined order, and a timing for sampling the accumulation signal of one of a first pixel group and a second pixel group, and a timing for sampling the reset signal of the other of the first pixel group and the second pixel group, back and forth in a sampling order, are matched to each other.