METHOD TO IDENTIFY FAULTS IN LED STRING

摘要

A method includes receiving a first voltage from an intermediate node in a string (104) of multiple light emitting diodes (LEDs) (102). The method also includes receiving at least one second voltage based on a string voltage (VLED) across the string (104) of LEDs (102) The method further includes identifying whether at least one of the LEDs (102) has a fault using the first voltage and the at least one second voltage. The second voltage could be a single reference voltage, and a difference between the first voltage and the reference voltage could be compared to a threshold. Multiple second voltages could define a voltage range that includes a reference voltage, and a determination could be made whether the first voltage falls within the voltage range.