Image sensor including color separating lens array and electronic apparatus including the image sensor
Provided are an image sensor including a color separating lens array and an electronic apparatus. The image sensor includes: a sensor substrate including a plurality of first pixels and a plurality of second pixels, wherein each of the first pixels includes a plurality of photosensitive cells that are two-dimensionally arranged in a first direction and a second direction, and, a first pixel of a first group includes a first edge region and a second edge region that are arranged at opposite edges of the first pixel in the first direction and outputs first and second photosensitive signals with respect to the light incident on the first and second edge regions.
1. An image sensor comprising:
a sensor substrate including a plurality of first pixels configured to sense light of a first wavelength and a plurality of second pixels configured to sense light of a second wavelength that is different from the first wavelength; and
a color separating lens array configured to condense the light of the first wavelength onto the plurality of first pixels and condense the light of the second wavelength onto the plurality of second pixels,
wherein each of the first pixels includes a plurality of photosensitive cells that are two-dimensionally arranged in a first direction and a second direction perpendicular to the first direction, the plurality of photosensitive cells being configured to independently sense incident light, and
from among the plurality of first pixels, a first pixel of a first group includes a first edge region and a second edge region that are arranged at opposite edges of the first pixel in the first direction, the first pixel of the first group being configured to output a first photosensitive signal and a second photosensitive signal with respect to the incident light on the first edge region and the second edge region.
2. The image sensor of claim 1 , wherein a distance between the first edge region and the second edge region in the first direction is equal to or greater than a width of the first edge region in the first direction.
3. The image sensor of claim 2 , wherein the first pixel of the first group is further configured to output a third photosensitive signal with respect to light incident on a region between the first edge region and the second edge region.
4. The image sensor of claim 2 , wherein the first pixel of the first group is further configured to not output a photosensitive signal with respect to light incident on a region between the first edge region and the second edge region.
5. The image sensor of claim 1 , wherein the plurality of photosensitive cells in the first pixel of the first group include a first photosensitive cell and a second photosensitive cell that are arranged in the first direction.
6. The image sensor of claim 5 , wherein
each of the first photosensitive cell and the second photosensitive cell includes a first photodiode and a second photodiode that are arranged in the first direction,
the first photodiode of the first photosensitive cell is arranged in the first edge region and the second photodiode of the second photosensitive cell is arranged in the second edge region, and
the first pixel of the first group is configured to output the first photosensitive signal from the first photodiode of the first photosensitive cell and the second photosensitive signal from the second photodiode of the second photosensitive cell.
7. The image sensor of claim 5 , wherein
each of the first photosensitive cell and the second photosensitive cell includes one photodiode, and
the first pixel of the first group includes a mask pattern configured to block a first remaining region in the photodiode of the first photosensitive cell, the first remaining region being different from the first edge region in a light-receiving surface of the photodiode of the first photosensitive cell, and configured to block a second remaining region in the photodiode of the second photosensitive cell, the second remaining region being different from the second edge region in a light-receiving surface of the photodiode of the second photosensitive cell.
8. The image sensor of claim 1 , wherein the plurality of photosensitive cells in the first pixel of the first group include a first photosensitive cell, a second photosensitive cell, and a third photosensitive cell that are sequentially arranged in the first direction.
9. The image sensor of claim 8 , wherein
each of the first photosensitive cell, the second photosensitive cell and the third photosensitive cell include one photodiode,
the first photosensitive cell is arranged in the first edge region and the third photosensitive cell is arranged in the second edge region, and
the first pixel of the first group is configured to output the first photosensitive signal from the first photosensitive cell and the second photosensitive signal from the third photosensitive cell.
10. The image sensor of claim 8 , wherein
each of the first photosensitive cell and third photosensitive cell includes a first photodiode and a second photodiode that are arranged in the first direction,
the first photodiode of the first photosensitive cell is arranged in the first edge region and the second photodiode of the third photosensitive cell is arranged in the second edge region, and
the first pixel of the first group is configured to output the first photosensitive signal from the first photodiode of the first photosensitive cell and the second photosensitive signal from the second photodiode of the third photosensitive cell.
11. The image sensor of claim 1 , wherein the plurality of photosensitive cells in the first pixel of the first group include a first photosensitive cell, a second photosensitive cell, a third photosensitive cell, and a fourth photosensitive cell that are sequentially arranged in the first direction.
12. The image sensor of claim 11 , wherein
each of the first photosensitive cell, the second photosensitive cell, the third photosensitive cell and fourth photosensitive cell include one photodiode,
the first photosensitive cell is arranged in the first edge region and the fourth photosensitive cell is arranged in the second edge region, and
the first pixel of the first group is configured to output the first photosensitive signal from the first photosensitive cell and the second photosensitive signal from the fourth photosensitive cell.
13. The image sensor of claim 11 , wherein
each of the first photosensitive cell, the second photosensitive cell, the third photosensitive cell and fourth photosensitive cell includes a first photodiode and a second photodiode that are arranged in the first direction,
the first photodiode of the first photosensitive cell is arranged in the first edge region and the second photodiode of the fourth photosensitive cell is arranged in the second edge region, and
the first pixel of the first group is configured to output the first photosensitive signal from the first photodiode of the first photosensitive cell and the second photosensitive signal from the second photodiode of the fourth photosensitive cell.
14. The image sensor of claim 1 , wherein, from among the plurality of first pixels, a first pixel of a second group includes a third edge region and a fourth edge region that are arranged at opposite edges of the first pixel of the second group in the second direction and is configured to output a third photosensitive signal with respect to light incident on the third edge region and a fourth photosensitive signal with respect to light incident on the fourth edge region.
15. The image sensor of claim 14 , wherein
the plurality of photosensitive cells in the first pixel of the second group include a first photosensitive cell, a second photosensitive cell, and a third photosensitive cell that are sequentially arranged in the second direction,
each of the first photosensitive cell, the second photosensitive cell and the third photosensitive cell includes one photodiode,
the first photosensitive cell is arranged in the third edge region and the third photosensitive cell is arranged in the fourth edge region, and
the first pixel of the second group is configured to output the third photosensitive signal from the first photosensitive cell and the fourth photosensitive signal from the third photosensitive cell.
16. The image sensor of claim 14 , wherein, from among the plurality of first pixels, a first pixel of a third group includes a first apex region and a second apex region at opposite sides in a diagonal direction, the first pixel of the third group being configured to output a fifth photosensitive signal with respect to light incident on the first apex region and sixth photosensitive signal with respect to light incident on the second apex region.
17. The image sensor of claim 16 , wherein
the plurality of photosensitive cells in the first pixel of the third group include a first photosensitive cell at a first apex of the first pixel, a second photosensitive cell adjacent to the first photosensitive cell in the first direction, a third photosensitive cell adjacent to the first photosensitive cell in the second direction, a fourth photosensitive cell arranged at a second apex of the first pixel, a fifth photosensitive cell adjacent to the fourth photosensitive cell in the first direction, and a sixth photosensitive cell adjacent to the fourth photosensitive cell in the second direction,
each of the first photosensitive cell, the second photosensitive cell, the third, photosensitive cell, the fourth photosensitive cell, the fifth photosensitive cell and the sixth photosensitive cell include one photodiode,
the first photosensitive cell, the second photosensitive cell, and the third photosensitive cell are arranged in the first apex region and the fourth photosensitive cell, the fifth photosensitive cell, and the sixth photosensitive cell are arranged in the second apex region, and
the first pixel of the third group is configured to output the fifth photosensitive signal from the first photosensitive cell, the second photosensitive cell, the third, photosensitive cell and the sixth photosensitive signal from the fourth photosensitive cell, the fifth photosensitive cell, and the sixth photosensitive cell.
18. The image sensor of claim 16 , wherein, in an entire area of the image sensor, the first pixel of the first group is arranged in a first region in the first direction, the first pixel of the second group is arranged in a second region in the second direction, and the first pixel of the third group is arranged in a third region in the diagonal direction.
19. The image sensor of claim 1 , wherein a distance between the sensor substrate and the color separating lens array is about 30% to about 70% of a focal distance of the color separating lens array with respect to the light of the first wavelength.
20. The image sensor of claim 1 , further comprising a spacer layer arranged between the sensor substrate and the color separating lens array to form a distance between the sensor substrate and the color separating lens array.
21. The image sensor of claim 1 , wherein
the color separating lens array includes a first wavelength light condensing region configured to condense the light of the first wavelength onto the first pixels and a second wavelength light condensing region configured to condense the light of the second wavelength onto the second pixels, and
an area of the first wavelength light condensing region is greater than an area of the first pixel among the plurality of first pixels and an area of the second wavelength light condensing region is greater than an area of a second pixel among the plurality of second pixels, and
the first wavelength light condensing region partially overlaps the second wavelength light condensing region.
22. The image sensor of claim 1 , wherein the color separating lens array includes:
a first pixel region arranged at a position corresponding to each of the first pixels; and
a second pixel region arranged at a position corresponding to each of the second pixels,
wherein a difference between phases of the light of the first wavelength that has passed through a center of the first pixel region and the light of the first wavelength that has passed through the second pixel region is about 0.9π to about 1.1π.
23. An electronic apparatus comprising:
an image sensor configured to convert an optical image into an electrical signal;
a processor configured to control operations of the image sensor and to store and output a signal generated by the image sensor; and
a lens assembly for providing light from an object to the image sensor,
wherein the image sensor comprises:
a sensor substrate including a plurality of first pixels configured to sense light of a first wavelength and a plurality of second pixels configured to sense light of a second wavelength that is different from the first wavelength; and
a color separating lens array configured to condense the light of the first wavelength onto the plurality of first pixels and condense the light of the second wavelength onto the plurality of second pixels,
wherein each of the first pixels includes a plurality of photosensitive cells that are two-dimensionally arranged in a first direction and a second direction perpendicular to the first direction, the plurality of photosensitive cells being configured to independently sense incident light, and
from among the plurality of first pixels, a first pixel of a first group includes a first edge region and a second edge region that are arranged at opposite edges of the first pixel in the first direction, the first pixel of the first group being configured to output a first photosensitive signal and a second photosensitive signal with respect to the incident light on the first edge region and the second edge region, and
the processor is further configured to generate an auto-focusing signal based on a difference between the first and second photosensitive signals.