| CPC H01L 27/14612 (2013.01) [H01L 27/14603 (2013.01); H01L 27/14621 (2013.01); H01L 27/14627 (2013.01); H01L 27/1463 (2013.01); H01L 27/14636 (2013.01); H01L 27/14645 (2013.01); H04N 25/59 (2023.01); H04N 25/704 (2023.01); H04N 25/709 (2023.01); H04N 25/772 (2023.01)] | 5 Claims |
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1. An image sensor comprising:
a pixel array including a normal pixel group and an autofocusing pixel group, the autofocusing pixel group including unit pixels sharing a single microlens, and a device isolation layer electrically isolating the unit pixels from each other, and
a drain terminal connected to a drain photodiode, wherein
the unit pixels included in the autofocusing pixel group includes first unit pixels and second unit pixels,
each of the first unit pixels includes an autofocusing photodiode and each of the second unit pixels includes the drain photodiode,
the autofocusing photodiode is configured to generate electric charges that migrate to a floating diffusion region of a substrate,
the drain photodiode is configured to generate electric charges that discharge to the drain terminal, and
the pixel array having either one of a red-green-green-blue (RGGB) pattern and a red-green-blue-white (RGBW) pattern; and
a controller configured to generate an image based on a signal generated from the normal pixel group and to provide an autofocusing function based on a signal generated from the autofocusing pixel group.
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