Auxiliary Discharge Type Patents (Class 315/109)
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Patent number: 8294369Abstract: A plasma generator for delivering a generated plasma to an area that is a distance from the area where the plasma is initially generated, including a dielectric tube portion extending from a gas inlet to a discharge aperture; an anode formed at least substantially around a portion of the discharge tube, wherein the anode is electrically coupled, via an electrical connection, to a power supply; a cathode formed at least substantially around a portion of the discharge tube, wherein the cathode is electrically coupled, via an electrical connection, to the power supply; and an elongate discharge tube attached or coupled to the discharge aperture such that when a generated plasma is produced, the generated plasma flows through the discharge tube.Type: GrantFiled: August 18, 2009Date of Patent: October 23, 2012Assignee: Old Dominion UniversityInventor: Mounir Laroussi
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Patent number: 8169153Abstract: A circuit arrangement for a high-pressure discharge lamp, having a main combustion chamber with first and second main electrodes and an auxiliary combustion chamber including: an inverter having first and second electronic switches and first and second output terminals; a drive circuit for the electronic switches; and an auxiliary starting circuit. The auxiliary starting circuit has input terminals coupled to the output terminals of the inverter; a first output terminal for the first main electrode; a second output terminal for the second main electrode; and an auxiliary electrode arranged on the side of the first output terminal for inducing an auxiliary starting voltage in the auxiliary combustion chamber. The auxiliary starting circuit includes a cascade circuit formed by the auxiliary electrode and the second output terminal of the auxiliary starting circuit, which provides a voltage for starting the high-pressure discharge lamp.Type: GrantFiled: November 28, 2006Date of Patent: May 1, 2012Assignee: OSRAM AGInventor: Friedrich Witzani
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Patent number: 7378800Abstract: A starting apparatus for a high-pressure discharge lamp provided with an auxiliary starting electrode, has a series resonant circuit for the purpose of generating the starting voltage for the high-pressure discharge lamp. The resonant inductance of the series resonant circuit includes the primary winding of a transformer, whose secondary winding is provided for the purpose of applying the starting voltage to the auxiliary starting electrode (Z) of the high-pressure discharge lamp. The invention also relates to a high-pressure discharge lamp, in particular to a vehicle headlight lamp, having such a starting apparatus arranged in the lamp base.Type: GrantFiled: October 18, 2005Date of Patent: May 27, 2008Assignee: Patent-Treuhand-Gessellschaft für Elektrische Glühlampen mbHInventors: Günther Hirschmann, Bernhard Sieβegger
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Patent number: 7116053Abstract: A method of stabilizing an arc between electrode tips in a high pressure arc discharge lamp is provided comprising initially creating an arc between the pair of electrodes during a start-up phase of the lamp by supplying power to the lamp for a first period. The method then transitions the arc to attach itself between the tips of the electrodes by removing the power supplied to the lamp for a second period and then resupplying power to the lamp after completion of the second period. The first and second periods for respectively initially supplying and removing power are preferably selected based on either an elapsed period of time, the measured operating lamp voltage, or the measured lamp pressure. Once the arc becomes attached to the tips of the electrodes in this manner, the arc will remain stabilized between the electrode tips during operation of the discharge lamp.Type: GrantFiled: January 7, 2005Date of Patent: October 3, 2006Assignee: Ushio America, Inc.Inventors: Holger Claus, Andre Piotrowski
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Publication number: 20030111960Abstract: In order to improve the starting of a dielectric barrier discharge lamp it is proposed to provide means for igniting an auxiliary discharge inside the exhaust tube (5) of the lamp.Type: ApplicationFiled: December 2, 2002Publication date: June 19, 2003Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCH GLUHLAInventors: Gerhard Doll, Wolfgang Kumpf, Joseph-A. Olsen
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Patent number: 5168552Abstract: In liquid-ink color graphics printing, true black ink is preferred over composite black wherever possible, but poor print quality results from printing black ink too close to color ink, due to limitations in present ink chemistry. A method of processing color bit-map graphics data in a four-color liquid-ink printing system, so as to maximize use of black ink while maintaining a minimum spacing between black and color inks (FIGS. 2-4) is disclosed. The input data is stored in CMY bit-map color planes (54,56,58). Preliminarily, data representing composite black is moved from the color planes into a K plane (60) for printing by a true black pen. The data is examined (66) to detect any black ink within the minimum spacing from color ink. The examination is expedited by partitioning the data into blocks (FIG. 8A), and indicating each block as a color block, a black block, or a white block (FIG. 11).Type: GrantFiled: October 29, 1991Date of Patent: December 1, 1992Assignee: Hewlett-Packard CompanyInventors: Ronald J. Vaughn, John R. Matthews
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Patent number: 4074172Abstract: The invention relates to a device for operating a low-pressure sodium vapor discharge lamp without a stabilizing ballast.The lamp is provided with a discharge tube having first and second main electrodes opposing a third main electrode. An automatically operating change-over switch occasionally switches the lamp current to either the first or second electrodes. A reservoir of liquid sodium near the first electrode affects sodium vapor pressure in the discharge tube by the switching action.Type: GrantFiled: March 3, 1976Date of Patent: February 14, 1978Assignee: U.S. Philips CorporationInventors: Gustaaf A. Wesselink, Hendrik Roelofs, Gijsbert J. Ponsen