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BRIGHTNESS CONTROL SYSTEM FOR DECORATIVE LIGHT STRINGS

  • US 20170290121A1
  • Filed: 03/31/2016
  • Published: 10/05/2017
  • Est. Priority Date: 03/31/2016
  • Status: Active Grant
First Claim
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1. A constant-brightness lighting system comprising:

  • a light string having a plurality of LEDs distributed along a length of the light string; and

    a light-string controller connected to a first end of the light string, wherein the light-string controller includes;

    a battery compartment configured to receive one or more batteries, the one or more batteries configured to provide a battery voltage that varies in response to one or more battery conditions;

    a load sensor configured to sense a signal indicative of a brightness of the light string connected to the light-string controller; and

    a switching supply configured to draw operating power from the one or more batteries received by the battery compartment and to supply lighting power to the light string connected to the light-string controller, wherein the switching supply adjusts the supplied lighting power such that the sensed signal indicative of the brightness is within plus or minus 10% of a target signal indicative of a target brightness, the target signal being independent of the battery voltage.

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