Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Flashers
Patent
1989-12-21
1991-07-09
Mis, David
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Flashers
315276, 361386, H05B 4100
Patent
active
050308890
ABSTRACT:
A lamp ballast configuration in which input power is conducted by one circuit board to the switching devices of a half bridge circuit whose output is conducted on a second circuit board with the two circuit boards mounted parallel and spaced apart disposes the device package which extends between the two circuit boards in an exposed position for direct contact to a heat sink. Drive transformers for the switching devices are preferably mounted between the circuit boards and shielded on four of their six sides by a combination of ground planes on the circuit boards and wide, flat ground conductors connecting the ground planes of the two circuit boards. A compact, high efficiency (>91%) RF system is obtained which is suitable for excitation of an electrodeless, high-intensity-discharge lamp.
REFERENCES:
patent: 3500118 (1970-03-01), Anderson
patent: 4180763 (1979-12-01), Anderson
patent: 4910439 (1990-03-01), El-Hamamsy et al.
Borowiec Joseph C.
El-Hamamsy Sayed-Amr A.
Thomas Robert J.
Breedlove Jill M.
Davis Jr. James C.
General Electric Company
Mis David
Snyder Marvin
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