Solid state imaging device, method of controlling solid state imaging device, and program for controlling solid state imaging device
A solid state imaging device includes: a pixel array unit that has a plurality of pixels 2-dimensionally arranged in a matrix and a plurality of signal lines arranged along a column direction; A/D conversion units that are provided corresponding to the respective signal lines and convert an analog signal output from a pixel through the signal line into a digital signal; and a switching unit that switches or converts the analog signal output through each signal line into a digital signal using any of an A/D conversion unit provided corresponding to the signal line through which the analog signal is transmitted, and an A/D conversion unit provided corresponding to a signal line other than the signal line through which the analog signal is transmitted.
1. An imaging device, comprising:
a plurality of pixels including a first pixel and a second pixel;
a first comparator having an input terminal coupled to the first pixel via a first signal line, wherein the first comparator is configured to compare a reference signal with a first analog signal supplied via the first signal line;
a second comparator having an input terminal coupled to the second pixel via a second signal line, wherein the second comparator is configured to compare the reference signal with a second analog signal supplied via the second signal line;
a first switch having a closed position in which the first switch couples an output terminal of the first comparator to an input terminal of a first counter;
a second switch having a closed position in which the second switch couples the output terminal of the first comparator to an input terminal of a second counter;
a third switch having a closed position in which the third switch couples an output terminal of the second comparator to the input terminal of the first counter; and
a fourth switch having a closed position in which the fourth switch couples the output terminal of the second comparator to the input terminal of the second counter.
2. The imaging device of claim 1 , further comprising:
a color filter array including a plurality of color filters arranged to filter incident light received by the plurality of pixels, wherein the plurality of color filters are arranged in a Bayer pattern, and
wherein four pixels of the plurality of pixels share a floating diffusion.
3. The imaging device of claim 1 , wherein multiple pixels of the plurality of pixels share a floating diffusion.
4. The imaging device of claim 1 , wherein the first counter and the second counter are arranged in a horizontal direction.
5. The imaging device of claim 4 , wherein four pixels of the plurality of pixels share a floating diffusion.
6. The imaging device of claim 1 , further comprising:
a color filter array including a plurality of color filters arranged to filter incident light received by the plurality of pixels.
7. The imaging device of claim 6 , wherein the color filter array comprises white filters disposed in a checkerboard pattern.
8. The imaging device of claim 7 , wherein the color filter array comprises red and blue filters disposed in a checkerboard pattern at a pitch of two pixels vertically and horizontally.
9. The imaging device of claim 8 , wherein the red and blue filters are arranged to obliquely deviate by one pixel.
10. The imaging device of claim 6 , wherein the plurality of color filters in the color filter array are arranged in a Bayer pattern.
11. The imaging device of claim 1 , further comprising a switch controller configured to control the first, second, third, and fourth switches, wherein the switch controller is configured to select between activation of the first switch and the second switch, and to select between activation of the third switch and the fourth switch.
12. The imaging device of claim 11 , wherein the switch controller is configured to select between a first switching state and a second switching state,
wherein the first switch and the fourth switch are activated in the first switching state, and
wherein the second switch and the third switch are activated in the second switching state.
13. The imaging device of claim 1 , further comprising:
a first memory coupled to an output terminal of the first counter; and
a second memory coupled to an output terminal of the second counter.
14. The imaging device of claim 1 , wherein the first counter is configured to receive an output signal from the first comparator via the first switch, or an output signal from the second comparator via the third switch, or the output signals from both the first and second comparators via both the first and third switches.
15. The imaging device of claim 1 , wherein the second counter is configured to receive the output signal from the first comparator via the second switch, or the output signal from the second comparator via the fourth switch, or the output signals from both the first and second comparators via both the second and fourth switches.