LED LIGHTING DEVICE TO PWM DRIVING OF MICROCONTROLLER

PURPOSE: An LED lighting device to PWM driving of a microcontroller is provided to minimize power consumption by controlling the variation of a driving current according to the forward voltage of an LED line. CONSTITUTION: A static voltage source(10) supplies a constant voltage. An LED unit(20) has...

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Bibliographische Detailangaben
Hauptverfasser:	LEE, SANG KOOW, PARK, DAE JEON, KIM, NEUNG SOO
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY
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Beschreibung
Zusammenfassung:	PURPOSE: An LED lighting device to PWM driving of a microcontroller is provided to minimize power consumption by controlling the variation of a driving current according to the forward voltage of an LED line. CONSTITUTION: A static voltage source(10) supplies a constant voltage. An LED unit(20) has a plurality of LED devices which are serially connected to each other. A PWM controller(60) controls a driving current according to a PWM control signal. A voltage detecting unit(30) detects a driving voltage corresponding to a driving current. A microcontroller(50) controls the luminous state of an LED line. An error detecting unit(80) outputs an error signal when the LED line is determined as disconnection.