Methods for color sensing ambient light sensor calibration

A method for calibrating an electronic device having a color sensing ambient light sensor with light detectors having different spectral responses using a test system having a tunable light source with light-emitting diodes and control circuitry, comprising:

• with the light-emitting diodes of the tunable light source, supplying test light over a range of wavelengths;
• while the detectors are exposed to the test light, gathering measured response data from each of the detectors with the control circuitry;
• applying numerical optimization techniques implemented on the control circuitry to process the gathered measured response data to determine a spectral response for each of the detectors;
• and
• based on the spectral responses of the detectors, storing corresponding calibration data in the electronic device.

An electronic device, comprising:

• a color sensing ambient light sensor with light detectors having different spectral responses;
• control circuitry coupled to the color sensing ambient light sensor;
• and
• a display that is adjusted by the control circuitry based on information from the color sensing ambient light sensor, wherein the control circuitry stores calibration data for the light detectors based on spectral responses for the detectors that have been loaded from a test system having a tunable light source with light-emitting diodes.