H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/24 (2006.01) H05B 41/38 (2006.01)
Patent
CA 2056225
The present invention describes an apparatus and method for shutting off an electrodeless lamp such that it can be restarted instantaneously at any time. The method involves reducing the applied microwave power in a con- trolled way the moment the lamp is turned off. The reduc- tion of power is accomplished by modulating the microwave power with an ever decreasing duty factor or a decrease of analog power. This reduction in power results continually in reduced light output and lamp cooling while maintaining partial ionization of the lamp fill. Circuitry to accomplish this is also presented.
Dale Brian
Gregor Philip D.
Gte Laboratories Incorporated
Gte Products Corporation
R. William Wray & Associates
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