IP Library Granted Patent US 8,319,450
Granted Patent B2
US 8,319,450 · App. 12/598,942 · Granted Nov 27, 2012

Method for igniting and starting high-pressure discharge lamps

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Quick Facts
Patent No.
US 8,319,450
App. No.
12/598,942
Granted
Nov 27, 2012
Kind
B2
Abstract

A method for igniting and for starting high-pressure discharge lamps is provided. The method may include applying a takeover voltage to the lamp for a predetermined time of a burst; superimposing ignition pulses on the takeover voltage in such a way that the voltage of the ignition pulses and the takeover voltage are added up and an interruption being provided between two bursts; and changing the ignition pulses from burst to burst or within a burst from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa.

Claims (5)

1. A method for igniting and for starting high-pressure discharge lamps, the method comprising: applying a takeover voltage to the lamp for a predetermined time of a burst; superimposing ignition pulses on said takeover voltage in such a way that the voltage of the ignition pulses and the takeover voltage are added up and an interruption being provided between two bursts; and changing the ignition pulses from burst to burst or within a burst from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa.

2. The method for igniting and for starting high-pressure discharge lamps as claimed in claim 1 , wherein the interruption between two bursts is shortened.

3. The method for igniting and for starting high-pressure discharge lamps as claimed in claim 1 , wherein the ignition pulses are changed from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa, as soon as the abort criterion in a burst is reached, and not aborting the burst.

4. The method for igniting and for starting high-pressure discharge lamps as claimed in claim 1 , wherein the takeover voltage is a sinusoidal voltage with a frequency of several kHz.

5. The method for igniting and for starting high-pressure discharge lamps as claimed in claim 1 , wherein the takeover voltage is a square-wave voltage in the 100 Hz range.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 7, 2020
From: OSRAM GMBH
To: LEDVANCE GMBH
Reel/Frame 053144/0291 →
CHANGE IN LEGAL FORM Recorded May 5, 2015
From: OSRAM AG
To: OSRAM GMBH
Reel/Frame 035573/0624 →
CHANGE OF NAME Recorded Oct 25, 2012
From: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
To: OSRAM AG
Reel/Frame 029190/0766 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 5, 2009
From: KOCH, BERND; LICHTENBERG, STEFAN
To: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
Reel/Frame 023474/0920 →