LED CIRCUIT WITH ZENER DIODES
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United States of America Patent
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Issued Date -
Mar 15, 2012
app pub date -
Feb 10, 2011
filing date -
Feb 10, 2010
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Abandoned
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Abstract
A light emitting diode (LED) circuit having a plurality of LEDs electrically connected in series with a zener diode electrically connected to each LED in parallel. If an LED were to fail, the current can be routed around the failed LED, through the zener diode, and continue through the rest of the LEDs in the series connection. Thus, a failure in one LED does not cause the entire series string to lose their illumination. Some embodiments may place several LED strings in parallel with one another. Exemplary embodiments may mount the LCDs on a metal core printed circuit board (PCB). Further embodiments may place a thin metallic sheet or metallic surface on the rear surface of the PCB and in thermal communication with the PCB and/or LEDs.
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