| 摘要 |
<p>A universal two-lead igniter (20) for high intensity discharge lamps (18) includes a first parallel RC network (21, 22) connected in series circuit with a second network (23, 24, 25) between the two terminals sof the igniter. The second network may include a second parallel RC network (24, 25) coupled to the first RC network via a voltage-responsive bidirectional switching device (23), such as a Sidac. Alternatively, the second network may include a second capacitor (25) and an inductor (26) connected in series with the Sidac device. The igniter is adapted to be connected in parallel with the lamp and generates, by means of a resonant type of operation of the first and second networks, a high frequency, high voltage pulsatory open circuit voltage that provides more reliable ignition of a HID lamp.</p> |
