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Power efficient long range depth sensing

  • US 10,447,998 B2
  • Filed: 09/30/2016
  • Issued: 10/15/2019
  • Est. Priority Date: 09/30/2016
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a local component to issue a signal;

    an infrared (IR) projector;

    a request handler to;

    detect a snapshot request to conduct a long range depth capture based on the signal from the local component; and

    detect a preview request to conduct a short range depth capture;

    a mode controller communicatively coupled to the IR projector and the request handler, the mode controller to;

    activate the IR projector at a first power level for a first duration in response to the snapshot request, wherein the first power level is to be greater than a second power level corresponding to the short range depth capture and the first duration is to be less than a second duration corresponding to the short range depth capture; and

    activate at least one IR projector at the second power level for the second duration in response to the preview request;

    a three-dimensional (3D) sensor to detect a pattern of IR light; and

    a pattern synchronizer to conduct a synchronization between a pattern of IR light output from the IR projector and the pattern of light detected by the 3D sensor.

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