Traditional CMOS image censor employs Bayer format as color filter array. This format allows each pixel of the CMOS sensor to be excited by a specified wavelength of light, which includes color and infra-red.
While RGB-Ir technology enables infra-red only light to be passed to the IR pixel. In the RGB-Ir CFA format, several pixels had been converted to IR pixels. And the IR pixels are sensitive only to infra-red light.