Detecting outages in an LED lamp assembly

Apparatus and systems are disclosed for detecting outages in an LED lamp assembly 100. A lamp assembly includes a plurality of LED circuits 112 serially connected together. The LED circuits include an LED 118, a first resistor 120 and an optocoupler 122. Also a sense line electrically coupled to one...

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Bibliographic Details
Main Authors Ronald Brombach, John Barrs
Format Patent
LanguageEnglish
Published 16.05.2018
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Summary:Apparatus and systems are disclosed for detecting outages in an LED lamp assembly 100. A lamp assembly includes a plurality of LED circuits 112 serially connected together. The LED circuits include an LED 118, a first resistor 120 and an optocoupler 122. Also a sense line electrically coupled to one of the LED circuits having a first voltage value when all of LEDs in that plurality of LED circuits are operational and a second voltage value when at least one of the LEDs has failed. There is also a vehicle include a headlamp power driver, a body control module and a lamp assembly with a sense line. Which again has a first voltage wherein the LEDs are operational and a second voltage when at least one LED has failed.
Bibliography:Application Number: GB20170012961