Operating device and method for operating gas discharge lamps

Electric lamp and discharge devices: systems – Current and/or voltage regulation

Reexamination Certificate

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C315S307000, C315S308000

Reexamination Certificate

active

07038401

ABSTRACT:
The ignition of a gas discharge lamp is followed by a warm-up phase. During warm-up, sufficient power must be converted to enable the lamp to transition to an operating phase. This causes currents flowing at a damaging level into the electrodes in known devices. These high currents are avoided using: a regulation device that regulates the power of connected gas discharge lamps to a desired power; a setting device that limits a lamp current of connected gas discharge lamps to a limit value; a detection device that outputs a signal to the control device if a limit value setting is too low, putting a connected lamp into a state in which the lamp assumes the desired power; and a control device prescribing the limit value for the setting device and increasing the limit value if the detection device sends a signal to the control device.

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patent: 100 21 537 (2001-11-01), None
patent: WO 95/35645 (1995-12-01), None
Copy of Search Report (3 pages) for corresponding European application; search report was issued by the European Patent Office on Jan. 25, 2005.

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