US Patent 10418410 Optoelectronic modules operable to collect spectral data and distance data

Optoelectronic modules operable to collect distance data and spectral data include demodulation pixels operable to collect spectral data and distance data via a time-of flight approach. The demodulation pixels include regions with varying charge-carrier mobilities. Multi-wavelength electromagnetic radiation incident on the demodulation pixels are separated into different portions wherein the respective portions are used to determine the composition of the incident multi-wavelength electromagnetic radiation. Accordingly, the optoelectronic module is used, for example, to collect colour images and 3D images, and/or ambient light levels and distance data. The demodulation pixels comprise contact nodes that generate potential regions that vary in magnitude with the lateral dimension of the semiconductor substrate. The potential regions conduct the photo-generated charges from the photo-sensitive detection region to a charge-collection region. The photo-generated charges are conducted to the charge-collection region with respective drift velocities that vary in magnitude with the thickness of the semiconductor substrate.