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ZENER DIODE PROTECTION NETWORK IN SUBMOUNT FOR LEDS CONNECTED IN SERIES

  • US 20110057569A1
  • Filed: 09/09/2009
  • Published: 03/10/2011
  • Est. Priority Date: 09/09/2009
  • Status: Active Grant
First Claim
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1. A light emitting device comprising:

  • N flip-chip light emitting diodes (LEDs) connected in series, the LEDs having electrodes and semiconductor light emitting surfaces, where N is two or more, wherein there is a node at each connection between LEDs, and wherein the LEDs comprise a first end LED having an anode connected to a first power terminal and a second end LED having a cathode connected to a second power terminal; and

    a transient voltage suppression circuit connected to the N LEDs comprising a first end zener diode connected to the anode of the first end LED, a second end zener diode connected to the cathode of the second end LED, and only one intermediate zener diode per node connected to its associated node at each connection between LEDs.

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