Circuit arrangement for operating a discharge lamp

Details Circuit arrangement for operating a discharge lamp Circuit arrangement for operating a discharge lamp

1997-02-28

1999-04-06

Kinkead, Arnold

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315DIG5, 315219, 315227R, H05B 4100

Patent

active

058923276

ABSTRACT:
A circuit arrangement according to the invention for operating a discharge lamp (I) comprises a DC/AC converter (II) provided with a series circuit with a first and a second switching element, (1, 1', respectively) between a first and a second input terminal (5, 5', respectively) for connection to a DC voltage source, and with a starting circuit (F) with a first resistive means (R1) between the first input terminal (5) and the control electrode (2) of the first switching element (1). The DC/AC converter is also provided with a second resistive element (R2) which together with the first resistive element (R1) form a voltage divider between the input terminals (5, 5'). The power dissipation in the DC/AC converter is reduced thereby.

REFERENCES:
patent: 4684851 (1987-08-01), Van Meurs
patent: 4748383 (1988-05-01), Houkes
patent: 5387848 (1995-02-01), Wong

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