×

LIGHT EMITTING SYSTEM, OPTICAL POWER CONTROL DEVICE, AND CONTROL SIGNAL MODULE

  • US 20140197756A1
  • Filed: 07/08/2013
  • Published: 07/17/2014
  • Est. Priority Date: 01/17/2013
  • Status: Active Grant
First Claim
Patent Images

1. A light emitting system comprising:

  • a light emitting device that has a forward voltage with a magnitude dependent on an ambient parameter when driven with current; and

    an optical power control device including;

    a control signal module including;

    a reference voltage unit coupled to said light emitting device for detecting the forward voltage thereof, and outputting a reference voltage according to the forward voltage of said light emitting device; and

    a control signal generator coupled to said reference voltage unit for receiving the reference voltage, and operable to generate, according to the reference voltage, a control signal having a parameter associated with the reference voltage; and

    a current controller coupled to said light emitting device, and coupled to said control signal generator for receiving the control signal, said current controller being operable to permit flow of a driving current through said light emitting device, the driving current being associated with the parameter of the control signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×