LED circuit arrangement with improved flicker performance

A circuit arrangement (1) for a light emitting device, comprising a first circuit branch (2) for receiving an AC voltage and comprising a first light emitting diode (LED) circuit (3) serially connected with a first phase-shifting element (4), a second circuit branch (12) connected in parallel with t...

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Bibliographische Detailangaben
1. Verfasser: RADERMACHER HARALD J. G
Format: Patent
Sprache:eng
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Zusammenfassung:A circuit arrangement (1) for a light emitting device, comprising a first circuit branch (2) for receiving an AC voltage and comprising a first light emitting diode (LED) circuit (3) serially connected with a first phase-shifting element (4), a second circuit branch (12) connected in parallel with the first circuit branch, the second circuit branch comprising a second LED circuit (13) serially connected to a second phase-shifting element (14), in reverse order compared with the LED circuit and phase-shifting element in the first circuit branch, and a third circuit branch (22) comprising a third LED circuit (23) connected between the first and second branches. With such a circuit design, the current through the first and second LED can be phase shifted compared with the current though the third LED circuit, so that the first and second light emitting diode circuits emit light during one time period, while the third light emitting diode circuit emits light during a second period.