Integrated proximity sensor and light sensor

  • US 7,714,265 B2
  • Filed: 01/05/2007
  • Issued: 05/11/2010
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
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First Claim
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1. An apparatus to sense proximity and to sense light, the apparatus comprising:

  • an emitter of electromagnetic radiation;

    a detector of electromagnetic radiation, the detector having a sensor configured to detect electromagnetic radiation from the emitter when the apparatus is sensing proximity and configured to detect electromagnetic radiation from a source other than the emitter when the apparatus is sensing light, wherein the emitter is configured to emit IR light modulated with a first waveform at a first frequency, and further comprising;

    processing logic to distinguish between IR light modulated with the first waveform or at the first frequency and ambient IR light when the apparatus is sensing proximity.

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