LED lighting system

  • US 10,652,979 B2
  • Filed: 11/22/2019
  • Issued: 05/12/2020
  • Est. Priority Date: 02/25/2004
  • Status: Active Grant
First Claim
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1. An LED lighting device comprising:

  • an LED package comprising a plurality of LED chips electrically connected in series and power connection leads connected to respective input and output ends of the series connected LED chips;

    wherein the LED chips comprise a phosphor coating to produce a change in a color or a quality of light emitted from the LED chips, wherein the LED chips, the power connection leads, and the phosphor coating are formed or mounted to a flexible substrate that is sufficiently flexible to be formed into a cylindrical shape;

    an LED driver circuit comprising a bridge rectifier and a capacitor, the LED driver circuit configured to receive an AC voltage from a mains voltage power source and provide a DC voltage output to the LED package through the power connection leads; and

    wherein the LED chips connected in series have a total forward voltage drop that matches the DC voltage output of the LED driver circuit.

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