Method and apparatus for regulating the drive currents of a plurality of light emitters

Method and apparatus for regulating the drive currents of a plurality of light emitters

  • CN 1,746,948 B
  • Filed: 06/17/2005
  • Issued: 08/29/2012
  • Est. Priority Date: 09/10/2004
  • Status: Active Grant
First Claim
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1. device that is used to adjust the drive current of plurality of light emitters, it comprises:

  • Plurality of light emitters;

    One optical sensor, it is positioned to detect a combined light of being sent by said illuminator;

    AndOne control system;

    It is used for i) come the some drive currents in the modulated complex drive current according to some unique modulation sequence of a plurality of unique modulation sequences;

    Ii) the drive current after the said modulation is applied to said illuminator;

    Iii) make each unique modulation sequence relevant with counterpart in a succession of optical measurement value that obtains by said optical sensor;

    Thereby extract optic response, and iv) according to each drive current of the adjustment of the relation between each drive current optic response corresponding with it to each drive current in said a plurality of drive currents with serial mode.

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