CIRCUIT ARRANGEMENT FOR CONTROLLING A LED UNIT AND METHOD OF OPERATING THE SAME

CIRCUIT ARRANGEMENT FOR CONTROLLING A LED UNIT AND METHOD OF OPERATING THE SAME

A circuit arrangement (3, 3′) for controlling the brightness of at least one LED unit (2) is provided, comprising an input (8) for receiving a phase-cut operating voltage from a power supply (4), a signal processor (14, 14′), connected with said input (8) and adapted to provide a dimming signal (12)...

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Bibliographische Detailangaben
Hauptverfasser: VAN POMMEREN JASCHA, IZMIT SAIT, CLAESSENS DENNIS JOHANNES ANTONIUS, WANG YI, OBREBSKI JAN WOJCIECH, VAEL PHILIP LOUIS ZULMA
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Zusammenfassung:A circuit arrangement (3, 3′) for controlling the brightness of at least one LED unit (2) is provided, comprising an input (8) for receiving a phase-cut operating voltage from a power supply (4), a signal processor (14, 14′), connected with said input (8) and adapted to provide a dimming signal (12) for said at least one LED unit (2) from said operating voltage. To allow an efficient reduction of noise in the dimming signal (12) but simultaneously to allow an improved dimming of said LED unit (2), said signal processor (14, 14′) is being configured to operate at least in a noise suppression mode (30) and a dimming mode (31). A control device (15, 15′) is provided, connected with said signal processor (14, 14′) and configured to set the mode of said signal processor (14, 14′) in dependence of the variation in said operating voltage.