Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Discharge control discharge device in the supply circuit
Patent
1988-12-15
1990-08-14
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Discharge control discharge device in the supply circuit
315224, 315226, 315241R, 315DIG7, 315DIG4, 315DIG5, 363 97, H05B 3702, H05B 3904, H05B 4114
Patent
active
049490168
ABSTRACT:
An electric arrangement for igniting and supplying a gas discharge lamp (1). The arrangement is connected to an alternating voltage source and comprises a rectifier bridge (7) connected to a DC/DC converter provided with a rectifier element (11), a coil (10) and a high-frequency switched semiconductor switching element (12) coupled to a drive circuit. The DC/DC converter is connected to the input terminals (16, 17) of a high-frequency DC/AC converter incorporating the lamp and provided with semiconductor switching elements (21,24). A capacitor (15) is arranged between the input terminals of the DC/AC converter and a sensor (22) for measuring the converter current is arranged between one of the input terminals (17) and a semiconductor switching element (21) of the DC/AC converter. The lamp is connected in series with a frequency-dependent impedance 20. A drive circuit (13) of the semiconductor switching element in the DC/DC converter is coupled to a control circuit (14) and is also coupled to the capacitor (15). The voltage across the capacitor (15) is set to a desired value by adjusting the frequency and the period of conductance of the semiconductor switching element (12). The sensor (22) is coupled to a second control circuit (27) which is connected to the drive circuits (21a, 24a) of the semiconductor switching elements (21, 24) of the DC/AC converter whereby the frequency and/or period of conductance of the switching elements of the DC/AC converter, and hence the power consumption of the lamp, can be regulated.
REFERENCES:
patent: 4170747 (1979-10-01), Holmes
patent: 4412154 (1983-10-01), Klein
patent: 4471269 (1984-09-01), Ganser et al.
patent: 4511823 (1985-04-01), Eaton et al.
patent: 4525650 (1985-06-01), Hicks et al.
patent: 4553070 (1985-11-01), Sairanen et al.
patent: 4585974 (1986-04-01), Stupp et al.
patent: 4587461 (1986-05-01), Hanlet
patent: 4700113 (1987-10-01), Stupp et al.
patent: 4766350 (1988-08-01), Husgen et al.
patent: 4791338 (1988-12-01), Dean et al.
patent: 4812736 (1989-03-01), Albach et al.
De Bijl Adrianus M. J.
Van Meurs Johannes M.
Franzblau Bernard
LaRoche Eugene R.
Shingleton Michael B.
U.S. Philips Corporation
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