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AMBIENT LIGHT SENSING USING A COLOR SENSOR

  • US 20080179497A1
  • Filed: 01/31/2007
  • Published: 07/31/2008
  • Est. Priority Date: 01/31/2007
  • Status: Active Grant
First Claim
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1. An ambient light sensor (ALS) system comprising:

  • a polychromatic color sensor to generate a plurality of analog signals from a corresponding plurality of color channels based on a detected ambient light signal;

    an analog-to-digital converter (ADC) coupled to the polychromatic color sensor, the analog-to-digital converter to convert the plurality of analog signals to a plurality of digital signals;

    a digital processor coupled to the analog-to-digital converter, the digital processor to generate a processed light signal according to a mapping of individual color responses to a standard color space, wherein the processed light signal describes a characteristic of the detected ambient light signal; and

    a memory device coupled to the digital processor, the memory device to store a correlated color temperature algorithm, wherein the digital processor is further configured to generate the processed light signal according to the correlated color temperature algorithm stored in the memory device.

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