Image sensor having improved light utilization efficiency

An image sensor comprising:

• a first pixel row including a first plurality of first pixels configured to sense first wavelength light and a plurality of second pixels configured to sense second wavelength light, the first plurality of first pixels and the plurality of second pixels being alternately arranged, the first wavelength light having a first wavelength and the second wavelength light having a second wavelength;
• a second pixel row adjacent to the first pixel row, the second pixel row including a second plurality of first pixels and a plurality of third pixels configured to sense third wavelength light, the second plurality of first pixels and the plurality of third pixels being alternatively arranged, the third wavelength light having a third wavelength;
• and
• a plurality of first color separation elements in the plurality of second pixels, respectively, the plurality of second color separation elements configured to change the spectrum distribution of the incident light such that a ratio of the second wavelength light to light incident on the plurality of second pixels and a ratio of the first wavelength light to light incident on at least one of the first and second pluralities of first pixels increase;
• and
• a plurality of second color separation elements in the plurality of third pixels, respectively, the plurality of second color separation elements configured to change the spectrum distribution of the incident light such that a ratio of the third wavelength light to light incident on the plurality of third pixels and the ratio of the first wavelength light to the light incident on the at least one of the first and second pluralities of first pixels increase.

An image sensor comprising:

• a first pixel row including a first plurality of first pixels configured to sense first wavelength light and a plurality of second pixels configured to sense second wavelength light, the first plurality of first pixels and the plurality of second pixels being alternately arranged, the first wavelength light having a first wavelength and the second wavelength light having a second wavelength;
• a second pixel row adjacent to the first pixel row, the second pixel row including a second plurality of first pixels and a plurality of third pixels configured to sense third wavelength light, the second plurality of first pixels and the plurality of third pixels being alternately arranged, the third wavelength light having a third wavelength;
• and
• a plurality of first color separation elements in the plurality of second pixels, respectively, the plurality of second color separation elements configured to change a spectrum distribution of incident light such that a ratio of the second wavelength light to light incident on the plurality of second pixels and a ratio of the first wavelength light to light incident on at least one of the first and second pluralities of first pixels increase;
• and
• a plurality of second color separation elements in the second plurality of first pixels in the second pixel row, respectively, the plurality of second color separation elements configured to change the spectrum distribution of incident light such that the ratio of the first wavelength light to light incident on the at least one of the first and second pluralities of first pixels and a ratio of the third wavelength light to light incident on the plurality of third pixels increase.