Patent ID: 9188482
Filing Date: 2015-11-17
Classification: G01J

Abstract:
1. An ambient light sensor for sensing incident light, comprising: a first photo-detector configured to be exposed to the incident light; a second photo-detector configured to be exposed to the incident light and formed proximate to the first photo-detector such that the first and second photo-detectors receive substantially similar portions of the incident light; a third photo-detector configured to be exposed to the incident light and formed proximate to at least one of the first photo-detector and second photo-detector; a circuit coupled to the first and second photo-detectors configured to determine an indication of spectral content of the incident light; and one or more switching circuits that selectively couple the first photo-detector to one of the second photo-detector and third photo-detector; wherein the first and second photo-detectors have first and second depths respectively; and wherein the first depth is relatively deeper than the second depth such that the first and second photo-detectors respond differently to a specific predetermined wavelength of the incident light.