AUTOMATIC DIMMER CIRCUIT OF FLUORESCENT LAMP

The circuit adjusts current applied to a fluorescent lamp through the control of a variable resistor by a user or by a photoconductive element sensing the light illumination of environs for automatic light adjustment. Power source terminals (A,B) connect via resistor (R1), bridge diode (2) and resis...

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Bibliographic Details
Main Author PARK, SEON-DONG
Format Patent
LanguageEnglish
Published 06.03.1989
Edition4
Subjects
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Summary:The circuit adjusts current applied to a fluorescent lamp through the control of a variable resistor by a user or by a photoconductive element sensing the light illumination of environs for automatic light adjustment. Power source terminals (A,B) connect via resistor (R1), bridge diode (2) and resistor (R2) to constant voltage diode, whose connecting node connecting via resistor (R3), variable resistor (VR) and integrated circuits (IC1-4) to the base of transistor (TR), the output of bridge diode (2) connecting via capacitor (C2), photoconductive sensor (CDS), switch (SW2), capacitor (C3) to the base of TR, whose collector and emitter resp. connecting to source (A) and choke coil middle terminal.
Bibliography:Application Number: KR19850004605