Image sensor module and image sensor device including the same
Disclosed is an image sensor module which includes a pixel array including a plurality of sub-pixels arranged along a plurality of rows and a plurality of columns, an analog to digital converter connected to the pixel array through a plurality of data lines and converting signals output from the plurality of sub-pixels into digital signals, a row decoder connected to the pixel array through a plurality of selection lines, a plurality of transfer lines, and a plurality of reset lines, and a control logic circuit controlling the analog to digital converter and the row decoder to allow a plurality of sub-frames to be sequentially outputted from the plurality of sub-pixels, wherein each of the plurality of sub-frames is generated based on signals output from different sub-pixels among the plurality of sub-pixels.
1. An image sensor system comprising:
a first image sensor including a first pixel array, and configured to generate a full frame using the first pixel array in a rolling shutter manner, the first pixel array including a plurality of first pixels, each of the first pixels including first sub-pixels, sub-pixels in one of the first pixels corresponding to a different color filter from each other;
a second image sensor including a second pixel array, and configured to generate a plurality of sub-frames using the second pixel array while the first image sensor generates the full frame, the second pixel array including a plurality of second pixels, each of the second pixels including second sub-pixels, sub-pixels in one of the second pixels corresponding to a same color filter with each other; and
an image signal processing unit configured to perform a signal processing operation on the full frame based on at least one of the plurality of sub-frames to generate a corrected image,
wherein:
the second image sensor is configured to generate a first sub-frame of the plurality of sub-frames using a first subset of the second sub-pixels, a second sub-frame of the plurality of sub-frames using a second subset of the second sub-pixels, and a third sub-frame of the plurality of sub-frames using a third subset of the second sub-pixels, and sequentially output the first sub-frame, the second sub-frame, and the third sub-frame.
2. The image sensor system of claim 1 , wherein the signal processing operation comprises at least one of a brightness correction, a color correction, a color interpolation, a gamma correction, a color space conversion, and an edge correction.
3. The image sensor system of claim 1 , wherein the sub-pixels in one of the second pixels are arranged by N×N, where the N a natural number.
4. The image sensor system of claim 3 , wherein the second image sensor is further configured to generate a fourth sub-frame of the plurality of sub-frames using a fourth subset of the second sub-pixels while the first image sensor generates the full frame.
5. The image sensor system of claim 4 , wherein four pixels, which are adjacent from each other, of the plurality of second pixels corresponds a first green color filter, a red color filer, a blue color filter, and a second green color filter, respectively.
6. The image sensor system of claim 5 , wherein each of the plurality of sub-frames includes color information on a first green color, a red color, a blue color, and a second green color (GRBG).
7. The image sensor system of claim 1 , wherein a first time period when the full frame is generated by the first image sensor is longer than a second time period when each of the plurality of sub-frames is generated by the second image sensor.
8. The image sensor system of claim 1 , wherein the second image sensor generates each of the plurality of sub-frames by performing a reset operation, an exposure operation, and a readout operation.
9. The image sensor system of claim 8 , wherein a first time taken to perform the exposure operation for the first sub-frame is different from a second time taken to perform the exposure operation for the second sub-frame.
10. The image sensor system of claim 8 , wherein each of the plurality of sub-frames includes brightness information, and
the brightness information of at least two of the plurality of sub-frames is different from each other.
11. The image sensor system of claim 1 , wherein a resolution of each of the plurality of sub-frames is smaller than a resolution of the full frame.
12. The image sensor system of claim 1 , wherein each of the second sub-pixels comprises:
a photodiode configured to generate charges in response to light passing through a corresponding color filter; and
a transfer transistor configured to be placed between one end of the photodiode and a first node, and operate in response to a transfer signal from a corresponding transfer line among of a plurality of transfer lines.
13. The image sensor system of claim 12 , wherein each of the second sub-pixels further comprises:
a reset transistor configured to be placed between the first node and a first voltage, and operate in response to a reset signal from a corresponding reset line among of a plurality of reset lines;
a selection transistor configured to be placed between the first voltage and a second node, and operate in response to a voltage of the first node; and
an access transistor configured to be placed between the second node and a corresponding data line among of a plurality of data lines, and operate in response to a selection signal from a corresponding selection line among of a plurality of selection lines.
14. The image sensor system of claim 13 , wherein the second image sensor further comprises:
a row decoder configured to control the plurality of transfer lines, the plurality of reset lines, and the plurality of selection lines; and
an analog-to-digital converter configured to convert analog signals from the plurality of data hens into digital signals, and output the second sub-frames based on the digital signals.
15. An image sensor system comprising:
a first image sensor configured to generate a first set of sub-frames;
a second image sensor configured to generate a second set of sub-frames; and
an image signal processing unit configured to perform a signal processing operation based on at least one of the first set of sub-frames and at least one of the second set of sub-frames to generate a corrected image,
wherein:
the first image sensor includes a first pixel array, the first pixel array including a plurality of first pixels, each of the first pixels including first sub-pixels, sub-pixels in one of the first pixels corresponding to a same color filter with each other,
the first image sensor is further configured to sequentially generate a first sub-frame of the first set using a first subset of the first sub-pixels, a second sub-frame of the first, set using a second subset of the first sub-pixels, and a third sub-frame of the first set using a third subset of the first sub-pixels,
the second image sensor includes a second pixel array, the second pixel array including a plurality of second pixels, each of the second pixels including second sub-pixels, sub-pixels in one of the second pixels corresponding to a same color filter with each other, and
the second image sensor is further configured to non-sequentially generate a first sub-frame of the second set using a first subset of the second sub-pixels, a second sub-frame of the second set using a second subset of the second sub-pixels, and a third sub-frame of the second set using a third subset of the second sub-pixels.
16. The image sensor system of claim 15 , wherein
the first subset of the first sub pixels is placed on the first pixel array in a first arrangement,
the second subset of the first sub-pixels is placed on the first pixel array in a second arrangement different from the first arrangement,
the third subset of the first sub-pixels is placed on the first pixel array in a third arrange lent different from the first and second arrangements, and
the first subset of the second sub-pixels is placed on the second pixel array in the first arrangement,
the second subset of the second sub-pixels is placed on the second pixel array in the second arrangement, and
the third subset of the second sub-pixels is placed on the second pixel array in the third arrangement.
17. The image sensor system of claim 16 , wherein the first arrangement is defined by odd-numbered rows and odd-numbered columns,
the second arrangement is defined by the odd-numbered rows and even-numbered columns, and
the third arrangement is defined by even-numbered rows and the odd-numbered columns.
18. The image sensor system of claim 15 , wherein the signal processing operation comprises at least one of a brightness correction, a color correction, a color interpolation, a gamma correction, a color space conversion, and an edge correction.
19. The image sensor system of claim 15 , wherein a resolution of the corrected image is different from each of the first sub-frames and the second sub-frames.
20. The image sensor system of claim 15 , wherein each of the first sub-frames and the second sub-frames includes color information on a first green color, a red color, a second green color, and a blue color (GRBG).