Circuit and method for improved dimming of gas discharge lamps

Details Circuit and method for improved dimming of gas discharge lamps Circuit and method for improved dimming of gas discharge lamps

H - Electricity

05

B

315/44

H05B 41/39 (2006.01) H05B 41/285 (2006.01) H05B 41/392 (2006.01)

Patent

CA 2032057

A control system for providing electrical power from a source to at least one gas discharge lamp comprises a circuit for providing to the lamp an ac component of current at a first frequency and a circuit for simulta- neously providing to the lamp an ac component of current at a second, and substantially lower, frequency. There is established a composite current waveform in the lamp which substantially eliminates the occurrence of visible stria- tions.

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