Operating circuit for high-pressure discharge lamps with an ignition-time bridging function
AssigneePatent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
InventorsMarkus Haederle, Josef Osterried
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Abstract
The circuit for operating a high-pressure gas discharge lamp (HID) has a ice (ZZU) for ignition-time bridging by switching in a second lamp (GL), the ignition-time bridging device (ZZU) being driven by a signal (S) indicating the operating state of the high-pressure discharge lamp (HID), and the drive signal (S) being an output signal of a power controller (R) of the circuit.
Claims5
A circuit for operating a high-pressure gas discharge lamp (HID) having a device (ZZU) for ignition-time bridging by switching in a second lamp (GL), in which the ignition-time bridging device (ZZU) is driven by a signal (S) indicating the operating state of the high-pressure gas discharge lamp (HID), characterized in that the drive signal (S) is an output signal of a power controller (R) of the circuit, the power controller (R) has a control characteristic which, when the power of the high-pressure gas discharge lamp (HID) is below a predetermined power value, changes the output signal of the power controller from a first value range of continuous power control to a second value range or to a fixed value for an intermediate interval.
Dependencies are inferred from the claim text.