Photodetector having dark current correction

A method for determining the light intensity of a light signal in each of a plurality of spectral bands, said method comprising:

• providing first, second, and third photodiodes that generate first, second, and third photodiode output signals, respectively, each photodiode output signal being indicative of a light intensity incident on that photodiode;
• providing a first pigment filter layer overlying said first photodiode but not said second photodiode, said first pigment filter layer being transparent to light in a first band of wavelengths and opaque to light in a second band of wavelengths;
• providing a second pigment filter layer overlying said second photodiode, but not said first photodiode, said second pigment filter layer being transparent to light in said second band of wavelengths and opaque to light in said first band of wavelengths;
• providing a layer comprising said first and second pigment filter layers overlying said third photodiode;
• and
• combining said first and third photodiode output signals to provide an estimate of said light intensity in said first band of wavelengths and combining said second and third photodiode output signals to provide an estimate of said light intensity in said second band of wavelengths.