Solid-state image pickup device and method for driving the same in solid-state imaging pickup device and method for driving the same in a number of modes
A system and method for driving a solid-state image pickup device including a pixel array unit including unit pixels. Each unit pixel includes a photoelectric converter, column signal lines and a number of analog-digital converting units. The unit pixels are selectively controlled in units of rows. Analog signals output from the unit pixels in a row selected by the selective control though the column signal lines are converted to digital signals via the analog-digital converting units. The digital signals are added among a number of unit pixels via the analog-digital converting units. The added digital signals from the analog-digital converting units are read. Each unit pixel in the pixel array unit is selectively controlled in units of arbitrary rows, the analog-distal converting units being operable to performing the converting in a (a) normal-frame-rate mode and a (b) high-frame-rate mode in response to control signals.
1. An imaging device comprising:
a pixel array unit including a plurality of pixels which are two-dimensionally arranged in columns and rows, the plurality of pixels including a first pixel, a second pixel, a third pixel, a fourth pixel, and a fifth pixel;
a plurality of signal lines including a first signal line coupled to the first pixel, a second signal line coupled to the second pixel, a third signal line coupled to the third pixel, a fourth signal line coupled to the fourth pixel, and a fifth signal line coupled to the fifth pixel;
a first comparator of a first Analog-to-Digital (A/D) converter coupled to the first signal line;
a plurality of switch circuits including a first switch circuit and a second switch circuit;
a second comparator of a second A/D converter selectively coupled to the second signal line or the third signal line through the first switch circuit; and
a third comparator of a third A/D converter selectively coupled to the fourth signal line or the fifth signal line through the second switch circuit,
wherein the first switch circuit couples the second signal line to the second comparator at a same time the second switch circuit couples the fourth signal line to the third comparator.
2. The imaging device according to claim 1 , further comprising a reference signal generation circuit that supplies a reference signal to the first comparator.
3. The imaging device according to claim 1 , wherein the first A/D converter includes a first counter and a first memory.
4. The imaging device according to claim 1 , wherein the first comparator receives a first output from the first signal line at a same time the second comparator receives a second output from the second signal line via the first switch circuit.
5. The imaging device according to claim 1 , wherein the first switch circuit couples the third signal line to the second comparator at a same time the second switch circuit couples the fifth signal line to the third comparator.
6. The imaging device according to claim 5 , wherein the first switch circuit is adjacent to the second switch circuit.
7. The imaging device according to claim 5 , wherein the first A/D converter is adjacent to the second A/D converter.
8. The imaging device according to claim 1 , wherein each pixel of the plurality of the pixels includes a photoelectric conversion element, a reset transistor, a transfer transistor, an amplifier transistor, and a select transistor.
9. The imaging device according to claim 1 , wherein the first signal line is not coupled to the second signal line.
10. The imaging device according to claim 1 , wherein the third signal line is not coupled to the fourth signal line.
11. The imaging device according to claim 1 , wherein the second signal line is between the first signal line and the third signal line.
12. The imaging device according to claim 1 , wherein the fourth signal line is between the third signal line and the fifth signal line.
13. An apparatus comprising:
an imaging device including:
a pixel array unit including a plurality of pixels which are two-dimensionally arranged in columns and rows, the plurality of pixels including a first pixel, a second pixel, a third pixel, a fourth pixel, and a fifth pixel,
a plurality of signal lines including a first signal line coupled to the first pixel, a second signal line coupled to the second pixel, a third signal line coupled to the third pixel, a fourth signal line coupled to the fourth pixel, and a fifth signal line coupled to the fifth pixel,
a plurality of switch circuits including a first switch circuit and a second switch circuit,
a first comparator of a first Analog-to-Digital (A/D) converter coupled to the first signal line,
a second comparator of a second A/D converter selectively coupled to the second signal line or the third signal line through the first switch circuit, and
a third comparator of a third A/D converter selectively coupled to the fourth signal line or the fifth signal line through the second switch circuit,
wherein, the first switch circuit couples the second signal line to the second comparator at a same time the second switch circuit couples the fourth signal line to the third comparator; and
an optical system configured to guide light to a pixel region of the imaging device.
14. The apparatus according to claim 13 , wherein the first comparator receives a first output from the first signal line at a same time the second comparator receives a second output from the second signal line.
15. The apparatus according to claim 13 , further comprising a reference signal generation circuit that supplies a reference signal to the first comparator.
16. The apparatus according to claim 13 , wherein the first switch circuit couples the third signal line to the second comparator at a same time the second switch circuit couples the fifth signal line to the third comparator.
17. The apparatus according to claim 13 , wherein the first A/D converter includes a first counter and a first memory.
18. The apparatus according to claim 13 , wherein each pixel of the plurality of the pixels includes a photoelectric conversion element, a reset transistor, a transfer transistor, an amplifier transistor, and a select transistor.
19. The apparatus according to claim 13 , wherein the first signal line is not coupled to the second signal line.
20. The apparatus according to claim 13 , wherein the third signal line is not coupled to the fourth signal line.