IMAGE SENSOR USING PIXELS WITH COMBINED RGB AND IR SENSING

摘要

A sensor system includes an array of pixels, each pixel including a first pixel and a second pixel. A first color filter provided over the first pixel is configured to pass a first color portion within and less than a visible portion of the spectrum. An infra-red color filter provided over the second pixel is configured to pass a near infra-red portion and an infra-red portion of the spectrum, but not the visible portion of the spectrum. An interference filter is provided over the first and second pixels, wherein the interference filter is configured to pass the visible portion of the spectrum and the near infra-red portion of the spectrum. The first pixel detects light sensed in the first color portion and the second pixel detects light sensed in the near infra-red portion. A processing circuit corrects the sensed first color portion as a function of the sensed near-infra-red portion.

主权项

1. A sensor pixel, comprising:
a sub-array of color pixels including a first pixel and a second pixel; a red color filter over the first pixel; an infra-red color filter over the second pixel; an interference filter over the first and second pixels; wherein the red color filter includes a first transmission pass band passing a region of the spectrum above a first wavelength; wherein the infra-red color filter includes a second transmission pass band passing a region of the spectrum above a second wavelength, the second wavelength being greater than the first wavelength; and wherein the interference filter includes a third transmission pass band passing a region of the spectrum below a third wavelength, the third wavelength being greater than the second wavelength.