Color sensing ambient light sensor calibration

A method for calibrating a color sensing ambient light sensor included in an electronic device, the method comprising:

• exposing the color sensing ambient light sensor to a first calibration ambient lighting corresponding to a first lighting cluster;
• obtaining a first color measurement produced by the color sensing ambient light sensor in response to being exposed to the first calibration ambient lighting, wherein the first color measurement includes a plurality of color measurement components indicating an amount of light detected by a respective one of a plurality of light detectors having substantially different spectral response profiles;
• calculating a first set of sensor correction parameters specific to the color sensing ambient light sensor based on a comparison between the first color measurement and a first reference color measurement associated with the first lighting cluster;
• storing the first set of sensor correction parameters in association with the first lighting cluster in a tangible machine-readable storage medium included in the electronic device;
• storing in the tangible machine-readable storage medium, in association with the first lighting cluster, a first set of generic transformation parameters for automatically converting a color measurement obtained from the color sensing ambient light sensor into a corresponding calibrated color value;
• and
• storing in the tangible machine-readable storage medium instructions which, when executed by the electronic device, cause the electronic device to:
• receive a first color measurement from the color sensing ambient light sensor;
• and
• calculate a calibrated color value based on the first color measurement using the first set of generic transformation parameters.

An electronic device adapted to determine calibrated color values for ambient lighting encountered by electronic device, the electronic device comprising:

• a color sensing ambient light sensor including a plurality of light detectors having substantially different spectral sensitivity profiles;
• one or more tangible machine readable media in which are stored:
• cluster parameters effective for automatically identifying which of a first plurality of lighting clusters is associated with a color measurement obtained for the color sensing ambient light sensor,
• one or more sets of sensor correction parameters, specific to the color sensing ambient light sensor and including a first set of sensor correction parameters for a first lighting cluster included in the first plurality of lighting clusters,
• a plurality of sets of generic transform parameters for automatically converting a color measurement obtained from a color sensing ambient light sensor into a corresponding calibrated color value, including a different set of generic transform parameters associated with each of the first plurality of lighting clusters,
• instructions which, when executed by the electronic device, cause the electronic device to:
• receive a first color measurement from the color sensing ambient light sensor,
• automatically identify, using the stored cluster parameters, which of the first plurality of lighting clusters is associated with the first color measurement,
• calculate a corrected color measurement by converting the first color measurement using one of the stored sets of sensor correction parameters,
• select, from the plurality of sets of generic transformation parameters stored in the tangible machine-readable storage medium, a first set of generic transformation parameters associated with the identified lighting cluster, and
• calculate a calibrated color value by converting the corrected color measurement using the selected first set of generic transformation parameters.