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FINGERPRINT SENSORS HAVING IN-PIXEL OPTICAL SENSORS

  • US 20160132712A1
  • Filed: 12/24/2014
  • Published: 05/12/2016
  • Est. Priority Date: 11/12/2014
  • Status: Active Grant
First Claim
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1. A fingerprint sensor device for fingerprint detection, comprising:

  • a light source configured to emit light at a wavelength; and

    an array of sensor pixels configured to acquire an optical image indicative of a fingerprint,each sensor pixel including;

    a photodetector configured to detect the emitted light reflected off of a target finger and outputs an optical signal based on the detected reflected light;

    a collimator disposed over the photodetector to direct the reflected light in a substantially vertical direction from above the photodetector toward the photodetector; and

    sensor signal detection circuitry communicatively coupled to the photodetector, the sensor signal detection circuitry configured to acquire the outputted optical signal.

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