Circuit for controlling light output of a discharge lamp

Details Circuit for controlling light output of a discharge lamp Circuit for controlling light output of a discharge lamp

1991-10-07

1993-04-27

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315224, 315DIG7, 363 49, H05B 4136

Patent

active

052065642

ABSTRACT:
A circuit arrangement for operating a discharge lamp (4). The circuit arrangement is provided with a DC-AC converter (3) and with a starter circuit (5) for starting the DC-AC converter. The starter circuit comprises a circuit (50, 52, 53) for generating starting pulses through the charging of a capacitor (50). The starter circuit also includes a discharge resistor (51) for discharging the capacitor, and a switching element for disconnecting and for keeping the starter circuit disconnected. The starter circuit thus can generate starting pulses in quick succession so that the luminous flux of the lamp is controllable over a wide range.

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patent: 4461980 (1984-07-01), Nilssen
patent: 4642746 (1987-02-01), Losed
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patent: 4920302 (1990-04-01), Konopka
patent: 4928039 (1990-05-01), Nilssen
patent: 4949016 (1990-08-01), De Bijl et al.
patent: 4965493 (1990-10-01), Van Meurs et al.
patent: 5068572 (1991-11-01), Blankers

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