TECHNIQUE FOR IDENTIFYING AT LEAST ONE FAULTY LIGHT EMITTING DIODE IN MULTIPLE STRINGS OF LIGHT EMITTING DIODES
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United States of America Patent
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Issued Date -
Aug 9, 2012
app pub date -
Feb 9, 2012
filing date -
Feb 9, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method includes receiving a first voltage from a first node associated with a first string of multiple light emitting diodes (LEDs). The method also includes receiving a second voltage from a second node associated with a second string of multiple LEDs. The method further includes identifying whether at least one of the LEDs has a fault using the first and second voltages. Identifying whether at least one of the LEDs has a fault could include comparing a difference between the first and second voltages to a threshold. Identifying whether at least one of the LEDs has a fault could also include determining whether a difference between the first and second voltages falls within a voltage range defined by higher and lower voltage limits.
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