H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/24 (2006.01) H05B 41/28 (2006.01)
Patent
CA 2056552
A starting circuit for an electrodeless HID lamp, comprising a series resonant LC circuit of variable impedance, provides a starting voltage to a fixed or movable starting probe substantially simultaneously with the application of power to the excitation coil from the main power source. In a preferred embodiment, the starting circuit provides a starting signal to a gas probe starter of the type including a fixed starting electrode couplets to a starting chamber which contains a relatively low-pressure gas and is attached to the outer wall of the arc tube. Resonant operation of the starting circuit results in the application of a sufficiently high voltage to ignite a glow discharge in the low-pressure starting chamber. In turn, the starting voltage is capacitively coupled to the arc tube, ionizing the fill and initiating an arc discharge therein. In an alternative embodiment, additional circuitry is provided for ensuring that the glow discharge in the low-pressure starting chamber is extinguished after initiation of the arc discharge.
Cocoma John Paul
Farrall George Albert
Company General Electric
Craig Wilson And Company
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