Having Electrode Heated By Space Discharge Current Patents (Class 313/627)
  • Patent number: 8896204
    Abstract: A high-pressure discharge lamp with a starting aid, may include a discharge vessel, wherein the discharge vessel has two ends with seals, in which electrodes are fastened, wherein the starting aid is fitted on the outside of the discharge vessel, wherein the starting aid has a local field amplifier having a configuration with at least one tip or edge or structure with a small radius of curvature, and wherein the starting aid produces a corona discharge which emits UV radiation into the discharge vessel.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: November 25, 2014
    Assignee: OSRAM GmbH
    Inventors: Simon Lankes, Stefan Lichtenberg
  • Patent number: 8710742
    Abstract: The present disclosure describes metal halide lamps having a discharge vessel, a discharge space, and at least one electrode extending into the discharge vessel in a sealed fashion so as to be in contact with the discharge space. A fill gas, at least one fill material, and optionally at least one volatile material are present in the discharge space. In some cases, the lamps can exhibit at least one of reduced run-up time, increased initial light output, and long life, while remaining useful for general lighting applications. Also described are methods for operating such metal halide lamps.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: April 29, 2014
    Assignee: OSRAM SYLVANIA Inc.
    Inventors: Nancy H. Chen, James A. Avallon, Edgar G. Estupiñán
  • Patent number: 8686639
    Abstract: A dielectric barrier discharge lamp is described, including a discharge tube having an elongated shape and enclosing a discharge gas therein, and a pair of electrodes. A portion of an outer peripheral surface of the discharge tube in a longitudinal direction of the discharge tube is defined as a light extraction area for extracting light induced in the discharge tube to an outside. The pair of the electrodes are placed on the outer peripheral surface such that the light extraction area is positioned between the pair of the electrodes in a peripheral direction of the outer peripheral surface of the discharge tube.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: April 1, 2014
    Assignee: GS Yuasa International Ltd.
    Inventors: Kazuya Hatase, Tsuyoshi Katagiri, Koji Hosotani
  • Patent number: 8664855
    Abstract: A high-pressure discharge lamp having an ignition aid may be provided, having a discharge vessel that is surrounded by gas, wherein the discharge vessel includes two ends having fusings in which electrodes are secured, wherein an ignition aid is fastened on at least one fusing, wherein the ignition aid has a local field amplifier in the form of a tip or a curved part, wherein the ignition aid is configured to cause a corona discharge in the surrounding gas which emits UV radiation into the discharge vessel.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: March 4, 2014
    Assignee: Osram AG
    Inventors: Johannes Buttstaedt, Stefan Dunkel, Leon Grabinski, Janbernd Hentschel, Bernd Koch, Stefan Lichtenberg, Martin Tueshaus
  • Patent number: 8405311
    Abstract: A discharge lamp includes an arc tube made of quartz glass and enclosing a light emitting substance, and an electrode mainly made of tungsten and arranged in the arc tube, the electrode including at least one getter material that binds with oxygen.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: March 26, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Noboru Sakurai, Yoshihide Nishiyama
  • Patent number: 8339043
    Abstract: In a mercury-containing arc discharge device for converting electrical energy into resonance radiation energy, the isotopic distribution of the mercury in the device is altered from that of natural mercury so as to reduce imprisonment time of resonance radiation and thereby increase the efficiency of conversion of electrical energy into resonance radiation. The mercury-199 isotope content of the mercury is lower than that in natural mercury and the mercury-201 and/or mercury-204 isotopes are greater than those in natural mercury.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: December 25, 2012
    Inventor: James Bernhard Anderson
  • Patent number: 8334652
    Abstract: A high-pressure discharge lamp may include an elongate ceramic discharge vessel, at the ends of which an electrode system with an electrode tip pointing towards the discharge is mounted in a seal, the seal being tubular, the discharge vessel having an aspect ratio of at least 1.5, the discharge vessel having a metal halide fill and a wall load of more than 25 W/cm2, wherein the lamp is configured for operation with longitudinal acoustic modulation, the specific rated power of the entire outer surface area of the discharge vessel lying between 17 and 22 W/cm2, while at the same time the wall load in a subregion of the surface area, which extends between the tips of the electrodes, lies in the range of between 28 and 40 W/cm2.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: December 18, 2012
    Assignee: OSRAM GmbH
    Inventors: Patrick Mueller, Klaus Stockwald, Herbert Weiss
  • Patent number: 8288946
    Abstract: To provide a flickerless discharge lamp which can remove hydrogen by a simple and safe means even if the lamp is a large discharge lamp with high pressure when lit, the discharge lamp has a pair of electrodes and a hydrogen getter (4) in the interior of an arc tube, the hydrogen getter (4) being formed of a container (41) made of metal which is hydrogen permeable and a hydrogen absorbent body (42) that is composed of a metal which can absorb hydrogen that is enclosed inside of the container (41) and is fixed to an inside wall of the container (41).
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: October 16, 2012
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Takeo Matsushima, Yukio Yasuda, Yutaka Mune
  • Patent number: 8210889
    Abstract: A method is provided for producing an infrared emitter made of an endless quartz glass body, wherein a reflector layer is deposited at least partially on the surface of the body made of quartz glass. The quartz body is divided into individual sections after application of the reflector layer. An infrared emitter is also provided.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: July 3, 2012
    Assignee: Heraeus Noblelight GmbH
    Inventors: Volker Reith, Sven Linow
  • Patent number: 8203268
    Abstract: A discharge lamp configured to suppress temperature increases in the electrode on the opening part side of a reflective mirror is described. The discharge lamp includes an F electrode and an R electrode having shapes before forming the melt electrodes that satisfy at least one of the following conditions (a) to (c): (a) The diameter of the core wire of the F electrode is d1f, and the diameter of the core wire of the R electrode is d1r, then d1f>1.2×d1r; (b) The wire diameter of the coil of said F electrode is d2f, and the wire diameter of the coil of the R electrode is d2r, then d2f>1.2×d2r; (c) the number of windings of the coil of the F electrode is nf, and the number of windings of the coil of the R electrode is nr, then nf>1.2×nr.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: June 19, 2012
    Assignee: Osram AG
    Inventors: Hideyuki Matsumoto, Takashi Noguchi
  • Patent number: 8203271
    Abstract: A metal halide lamp (MHL) includes: a light-transmitting hermetic vessel made of quartz glass, including: a surrounding portion having a discharge space formed therein; and at least one sealing portion joined to the surrounding portion; electrodes sealed within the discharge space of the light-transmitting hermetic vessel; a discharge medium filled within the discharge space of the light-transmitting hermetic vessel; and at least one sealed metal foil connected to proximal ends of the electrodes and hermetically embedded within the sealing portion, the sealed metal foil being formed with height-differentiating portions comprised of laser traces on at least one of surfaces of the metal foil.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: June 19, 2012
    Assignee: Harison Toshiba Lighting Corporation
    Inventors: Osamu Shirakawa, Hidehiko Noguchi
  • Patent number: 8198815
    Abstract: An inductively coupled fluorescent discharge lamp includes a light transmissive envelope having a re-entrant cavity that has an outer surface inside the envelope, and an excitation coil inside the re-entrant cavity, and a spring clip that is attached to the outer surface of the re-entrant cavity by spring action of the spring clip on the outer surface, where the spring clip includes an amalgam. The spring clip may include a layer of the amalgam plated on a surface of the clip, or an amalgam-bearing flag attached to the clip.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: June 12, 2012
    Assignee: OSRAM SYLVANIA Inc.
    Inventors: Richard S. Speer, Jeffery Serre
  • Patent number: 8093815
    Abstract: A high-pressure discharge lamp and a reflector lamp including a discharge vessel enclosing a discharge space which is provided with an ionizable filling comprising one or more halides. The discharge vessel is substantially constituted by a ceramic material having first and second end portions. Current-supply conductors issue through each end portion to respective electrodes arranged in the discharge space so as to maintain a discharge. At least one of the current-supply conductors is formed as a rod including iridium. The rod is directly sealed to the ceramic material.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: January 10, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Josephus Christiaan Maria Hendricx, Peter Jozef Vrugt, Franciscus Johannes Gerardus Hakkens, Cornelis Johannes Maria Denissen
  • Patent number: 8072131
    Abstract: A lamp assembly having a CFL light source includes an outer envelope received around the light source. The outer envelope includes a first enlarged portion dimensioned for receipt about the light source and a second narrowed portion adapted for connection with a lamp base. A platform receives a first end of the CFL light source and supports the CFL within the envelope, the platform including a tapered perimeter portion dimensioned for abutting engagement with an interior surface of the envelope.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: December 6, 2011
    Assignee: General Electric Company
    Inventors: Jozsef Fulop, Karoly Talosi, Gabor Schmidt, Janos Orban, Timea Sesztak
  • Patent number: 8049398
    Abstract: A long-life high-pressure discharge lamp can (i) suppress damage to sealing portions, especially at an initial stage of the accumulated lighting time, (ii) allow for easy assembly of components such as electrodes and (iii) prevent deformation/ripping of metallic foils. An arc tube is a glass enveloping vessel with electrodes arranged therein, and includes: a light emitting portion in which materials are enclosed and a discharge space is formed; and sealing portions provided at ends of the light emitting portion. Each electrode includes an electrode bar whose first end is in the discharge space, and whose second end is in the corresponding sealing portion and connected to a metallic foil. The second end of each electrode bar is partially wrapped around by a sleeve-like metallic cover foil that has a cut-out section positioned over a joining area where the second end of each electrode bar is joined to the metallic foil.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: November 1, 2011
    Assignee: Panasonic Corporation
    Inventors: Yoshiki Kitahara, Katsuhiro Ono, Jun Sakaguchi
  • Patent number: 8040065
    Abstract: An electric lamp is described, which has a quartz glass lamp vessel (10) accommodating an electric element (3, 4). The lamp vessel locally has a light-absorbing, non-reflective coating (11, 12). The coating mainly consists of iron, iron oxide, silicon, and silicon dioxide, the ratio of the weight percentages of iron (compounds) and silicon (compounds) being in the range of 0.17<=iron (compounds)/silicon (compounds)<-12, and the ratio of the weight percentages of silicon and silicon dioxide being in the range of 0.5<=silicon/silicon dioxide<=50.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: October 18, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Heinz Josef Schloemer
  • Patent number: 7946899
    Abstract: A high-pressure mercury vapor discharge lamp (1) comprising an envelope (2) of high temperature resistant material having a discharge vessel (3) and two electrodes (5, 6) extending from two seal portions (4) into the discharge vessel (3), the two electrodes having an electrode gap (de) smaller than or equal to 2.5 mm, preferably smaller than or equal to 1.5 mm, is described. The discharge vessel (3) contains a filling which essentially comprises the following substances: rare gas, oxygen, halogen consisting of chlorine, bromine, iodine, or a mixture thereof, as well as mercury in a quantity greater than or equal to 0.15 mg/mm3? The seal portions (4) have a cross-sectional area of between 6 mm2 and 20 mm2, preferably approximately 10 mm2. A method of manufacturing such a high-pressure mercury vapor discharge lamp (1) and a projector system for such a high-pressure mercury vapor discharge lamp (1) are also described.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: May 24, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Holger Moench, Pavel Pekarski
  • Patent number: 7683547
    Abstract: A method for lighting a flat fluorescent lamp for a large-sized backlight unit is disclosed, to prevent a discharge interference (scattering in fluorescent discharge) when lighting a plurality of groups of cylindrical electrodes being adjacent, in which an A.C. voltage is applied to one or two groups of cylindrical electrodes through introduction wires for lighting lamp in state of being not applied to adjacent one or two groups of cylindrical electrodes, so the plurality of groups of cylindrical electrodes are sequentially switched on and off in a time-division method at a speed not to generate the flicker of lamp.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: March 23, 2010
    Assignee: LG Display Co., Ltd.
    Inventor: Masanobu Aizawa
  • Patent number: 7423379
    Abstract: A high-pressure discharge lamp has a discharge vessel (10) enclosing a discharge space (11) which contains an ionizable filling. The discharge vessel has a first (2) and a second (3) mutually opposed neck-shaped portion provided with a pair of electrodes (6, 7) arranged in the discharge space (13). Each electrode is tubular over its entire length. Preferably, the electrodes are free from coils in the discharge space. Preferably, the electrodes extend to outside the discharge vessel. The high-pressure discharge lamp according to the invention is relatively easy to manufacture.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: September 9, 2008
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Hendrik Anton Van Esveld, Vincent Marco Fischer, Jeroen Waltherus Johannes Schoone
  • Patent number: 7375458
    Abstract: This disclosure relates to continuous carbon-nanotube filaments of radiation-emitting devices and methods for fabricating them.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: May 20, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, James Stasiak, Robert Bicknell
  • Patent number: 7282864
    Abstract: A discharge tube is driven by a multiple-phase drive circuit, and includes a discharge container having an internal discharge space and multiple electrodes that are secured to the discharge container and correspond to each phase of the multiple-phase drive circuit. The tips of the multiple electrodes protrude into the discharge space, and are oriented toward a predetermined single point of union. All of the electrodes located on one side of a virtual plane that includes the predetermined point of union. Furthermore, a discharge lamp having the discharge tube includes three electrodes, and electric discharge can take place between each pair of electrodes. When the discharge lamp is driven at maximum output, voltage is impressed to the three electrode terminals such that at least one of the voltages VeAB, VeBC, VeCA between the three electrode terminals will be in a discharge period.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: October 16, 2007
    Assignee: Seiko Epson Corporation
    Inventor: Kesatoshi Takeuchi
  • Patent number: 7211956
    Abstract: A short-arc ultra-high pressure mercury lamp in which the change in the shape of the electrodes can be suppressed and a stable arc discharge can always be produced is achieved in an arrangement in which, in the silica glass arc tube, there is a pair of opposed electrodes with a distance between them of at most 2 mm and the tube is filled with at least 0.15 mg/mm3 of mercury, a rare gas, and a halogen in the range from 1×10?6 ?mole/mm3 to 1×10?2 ?mole/mm3, by at least one of the electrodes having a melt part formed toward the electrode tip by winding the electrode rod with a coil and by melting the part of the coil oriented towards the electrode tip at least in the area of its surface. A part of the coil located away from the electrode tip is unmelted and the base point side area of the coil facing away from the electrode tip is rounded and does not have sharp edges.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: May 1, 2007
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Takuya Tukamoto, Yoshihiro Horikawa, Yoshikazu Suzuki
  • Patent number: 5028835
    Abstract: A thermionic energy converter comprises an emitter, a transparent collector support generally parallel to an emitting surface of the emitter, a conductive film collector from about 10 to about 3,000 Angstroms in thickness covering a support surface of the collector support, and an enclosure for maintaining a controlled atmosphere in the gap between the conductive film collector and the emitting surface. According to another embodiment an improvement is set forth in a thermionic energy converter comprising an emitter, a collector and an enclosure adapted to maintain a controlled atmosphere in the emitter-collector gap. The improvement comprises an insulator post supportingly attaching the emitter and the collector. The embodiments are advantageously used together.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: July 2, 1991
    Inventor: Gary O. Fitzpatrick
  • Patent number: 4766349
    Abstract: An electrode for electric arc processes composed of a water-cooled holder (1) into which is fitted a case hardened of diffusion coated insert of zirconium or hafnium. The diffusion zone (5) consists of carbide, nitride, boride or silicide, compounds with very high melting points that will supress reactions between the holder and the insert that cause deterioration of the electrode.
    Type: Grant
    Filed: June 5, 1986
    Date of Patent: August 23, 1988
    Assignee: AGA Aktiebolag
    Inventors: Jan O. Johansson, Jan-Erik Andersson, Tomasz Niklewski, Lars E. Edshammar
  • Patent number: 4415835
    Abstract: An electric discharge type device is described having electrode means which include a refractory metal substrate having sintered thereon an open porous coating of refractory metal particles at a thickness up to about 1 millimeter thickness with electron emissive material being disposed in the pores of said sintered refractory metal coating. Representative electric discharge devices having said improved electrode means include discharge type electric lamps and photographic flash tubes wherein the electrode members have an elongated shaped body which is terminated at one end to provide more surface area for the coatings sintered thereon. Various electron emissive materials can be employed for impregnation of the open porous coating of refractory metal particles by such conventional techniques as dipping or spraying.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: November 15, 1983
    Assignee: General Electric Company
    Inventors: Amarendra Mishra, Dimitri M. Speros, Roger M. Eastin