| 摘要 |
High frequency ballasts are provided herein for ignition control of a ceramic high intensity discharge (HID) lamp. A sensor senses a lamp parameter on the output terminals. A microprocessor is attached to the ignition circuit and the sensor. The ignition circuit is configured by the microprocessor to apply a train of pre-ignition bursts to the electrodes and stop the train of pre-ignition bursts responsive to measurement of the lamp parameter. The measured lamp parameter is indicative of a stable arc at the proximal ends of the capillaries. |
