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PROXIMITY AND AMBIENT LIGHT SENSOR WITH IMPROVED SMUDGE REJECTION

  • US 20120295665A1
  • Filed: 05/19/2011
  • Published: 11/22/2012
  • Est. Priority Date: 05/19/2011
  • Status: Active Grant
First Claim
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1. An apparatus to sense proximity,and to sense ambient light, the apparatus comprising:

  • an emitter of an IR proximity signal;

    a detector configured to detect the IR proximity signal from the emitter when the apparatus is sensing proximity, and to detect ambient light when the apparatus is sensing ambient light;

    an IR cut filter disposed over the detector, the IR cut filter having a film disposed over the detector that rejects IR light but passes visible light to the detector, the IR cut filter having an opening in the film centered over a midpoint of the detector that passes IR and visible light to the detector.

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