Having A Particular Total Or Partial Pressure Patents (Class 313/568)
  • Patent number: 8795019
    Abstract: To prevent bending of an electrode shaft portion by a method which requires minimum increase in production cost, in an electrode mount for a high pressure discharge lamp. A manufacturing method of an electrode mount for the high pressure discharge lamp includes: a process of subjecting the electrode mount to a heat treatment, the electrode mount including an electrode and a metal foil which are welded to each other; and an oxidation process of producing an oxide on a surface of the electrode shaft portion of the electrode by laser irradiation to form an oxidation portion on the surface, wherein a laser irradiation position is determined such that a whole or part of the oxidation portion is included in a sealing portion of the high pressure discharge lamp when the electrode mount is embedded in the sealing portion.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: August 5, 2014
    Assignee: Iwasaki Electric Co., Ltd
    Inventors: Atsushi Ohno, Kazushi Tominaga, Shinichi Takemasa
  • Publication number: 20140167606
    Abstract: A high-pressure discharge lamp having a starting aid and having a discharge vessel is disclosed, wherein the discharge vessel has two ends with seals, in which electrodes and possibly power supply lines are fastened, wherein the starting aid includes a wire system consisting of a core wire and a wrapping wire applied thereto, wherein the wrapping wire is a flat-pressed or flattened wire.
    Type: Application
    Filed: May 22, 2012
    Publication date: June 19, 2014
    Applicant: OSRAM GMBH
    Inventors: Klaus Meyer, Konrad Regler, Claus Pfaller, Janbernd Hentschel
  • Patent number: 8410692
    Abstract: A lamp for receiving at least one light emitting diode as a light-emitting means, having a bottom part as a supporting element and for feeding the electric connecting wires to a mounting device carrying the at least one light emitting diode, and having a lamp shade. The mounting device is a separate mounting substrate having a breaking strength between 100 and 1,000 MPa and is arranged on the bottom of the device.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: April 2, 2013
    Assignee: CeramTec GmbH
    Inventors: Alexander Dohn, Karl Degelmann, Christian Schnagl, Armin Veitl
  • Patent number: 8072140
    Abstract: A metal-halogenide filling for forming an ionisable filling comprises at least one inert gas, mercury and at least one halogen, the filling including at least the components Rb-halogenide and Mn-halogenide. This filling can in particular be contained in the discharge container of a metal-halogenide lamp.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: December 6, 2011
    Assignee: Osram AG
    Inventor: Hans Eisemann
  • Patent number: 8049422
    Abstract: An electric discharge lamp has a ceramic luminous tube 5 and filled with xenon gas, a pair of electrodes 9, 10 held by the ceramic luminous tube, and a glass outer tube 6 accommodating the ceramic luminous tube and the pair of electrodes. The ceramic luminous tube includes a luminous portion 7 emitting light by electric discharge, and a pair of small diameter tube portions 8, 8 respectively connected to both end portions of the luminous portion in a longitudinal direction. Value of P/(r•t) is not less than 4.8 and not more than 32, where P (atm) is pressure of xenon gas filled into the ceramic luminous tube, r (mm) is an inner diameter of the luminous portion of the ceramic luminous tube, and t (mm) is thickness of the luminous portion of the ceramic luminous tube.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: November 1, 2011
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Toshiaki Tsuda, Yukihiro Onoda
  • Patent number: 7969091
    Abstract: An apparatus of light source includes a cathode structure, an anode structure, a fluorescent layer, a secondary electron generating layer, and a low-pressure gas layer. The fluorescent layer is located between the cathode structure and the anode structure. The low-pressure gas layer is filled between the cathode structure and the anode structure. The secondary electron generating layer is located on the cathode structure. The secondary electron generating layer can generate additional secondary electrons to hit the fluorescent layer for improving the performance of the light source.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: June 28, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Yi-Ping Lin, Jung-Yu Li, Shih-Pu Chen, Wei-Chih Lin, Lian-Yi Cho
  • Publication number: 20110133663
    Abstract: A high-pressure discharge lamp, which has no electrodes and is excited by means of high-frequency electromagnetic waves, may include an ceramic elongated discharge vessel, which has an axis, where the discharge vessel has a filling that forms a plasma, when radio frequency power (RF) is coupled into the filling from the base body, where the filling comprises a gas and at least one metal halide, where a circuit for operation of the lamp is coordinated, which provides RF power, so that the coupled-in RF power vaporizes the metal halide, which leads to light emission, wherein the discharge vessel is specially designed for operation with acoustic modulation control of the plasma flow, wherein the discharge vessel is divided into a central part with at least approximately constant internal diameter and two ends, whose internal diameter reduces towards the end.
    Type: Application
    Filed: July 20, 2009
    Publication date: June 9, 2011
    Applicant: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
    Inventor: Klaus Stockwald
  • Patent number: 7948182
    Abstract: The invention relates to novel gas fillings of low-pressure gas discharge lamps for reducing the starting and arc drop voltages at low Hg vapor pressures. In favor of a mixture consisting of Ne and Kr, the Ar portion of the gas filling is considerably reduced.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: May 24, 2011
    Assignee: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventors: Martin Beck, Jürgen Dichtl, Roland Hoffmann, Maria Hoffmann, legal representative, Astrid Hoffmann, legal representative, Kerstin Hoffmann, legal representative
  • Patent number: 7893617
    Abstract: An all-metal electron emissive structure for low-pressure lamps is disclosed. The all-metal electron emissive structure consisting of one or more metal is operable to emit electrons in response to a thermal excitation, wherein an active region of the electron emissive structure under steady state operating conditions has a temperature greater than about 1500 degree K, and wherein the cathode fall voltage in the discharge medium under steady state operating conditions is less than about 100 volts. A lamp including an envelope, an electrode including the all-metal electron emissive structure, and a medium, is also disclosed.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: February 22, 2011
    Assignee: General Electric Company
    Inventors: Timothy John Sommerer, David John Smith
  • Publication number: 20100231813
    Abstract: This cold cathode tube lamp comprises a glass tube (11) into which at least a rare gas is filled, a pair of first electrodes (21, 22) disposed to face each other at both inner end portions of the glass tube (11) and composed of cylinder-shaped first cylindrical portions (21a, 22a) with openings at one ends and first bottom portions (21b, 22b) closing the other ends of the first cylindrical portions (21a, 22a), and second electrodes (41, 42) provided in the respective first electrodes (21, 22). The second electrodes (41, 42) include at least cylinder-shaped second cylindrical portions (41a, 42a) with openings at each one end thereof. The second electrodes (41, 42) are disposed such that the second cylindrical portions (41a, 42a) are a predetermined distance away from the respective first cylindrical portions (21a, 22a) of the first electrodes (21, 22).
    Type: Application
    Filed: April 9, 2008
    Publication date: September 16, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yoshiki Takata
  • Patent number: 7750570
    Abstract: The present invention relates to glow-switch starters 1, lighting devices therewith and use thereof. The glow-switch starter 1 is suitable for use with three phase supply voltages substantially higher than the common 230V supply voltage 26. This allows more efficient gas discharges in e.g. fluorescent lamps 20, and/or more lamp power, and/or less energy losses in ballasts 22 and lamp electrodes. To make the glow-switch starter suited for such use, according to the invention, the gas filling 5 of the starter 1 is adapted. An important criterion is that the glow current in the steady state operation of the fluorescent lamp that is started by the starter is small enough to prevent closing of the (bimetallic) switch.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: July 6, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Anthony Kroes, Rob Van Rooij, Olaf Mastenbroek, John Daniels
  • Patent number: 7633226
    Abstract: An electron emissive material includes a composition including a metal oxide, where the metal oxide is at least one oxide of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Sc, Hf, or Zr, or any combinations thereof, where the metal oxide is present in a quantity that ranges from about 20% to 100% by weight of the total composition, where the composition is operable to emit electrons in a discharge medium in response to a thermal excitation, wherein the discharge medium under steady state operating conditions producing a total vapor pressure of less than about 2×105 Pa. A lamp including an envelope, an electrode including an electron emissive material and a discharge medium, is also disclosed.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: December 15, 2009
    Assignee: General Electric Company
    Inventors: Joseph Darryl Michael, John Anthony DeLuca
  • Publication number: 20090134792
    Abstract: An electric discharge lamp has a ceramic luminous tube and filled with xenon gas, a pair of electrodes 9, 10 held by the ceramic luminous tube, and a glass outer tube 6 accommodating the ceramic luminous tube and the pair of electrodes. The ceramic luminous tube includes a luminous portion 7 emitting light by electric discharge, and a pair of small diameter tube portions 8, 8 respectively connected to both end portions of the luminous portion in a longitudinal direction. Value of P/(r·t) is not less than 4.8 and not more than 32, where P (atm) is pressure of xenon gas filled into the ceramic luminous tube, r (mm) is an inner diameter of the luminous portion of the ceramic luminous tube, and t (mm) is thickness of the luminous portion of the ceramic luminous tube.
    Type: Application
    Filed: November 24, 2008
    Publication date: May 28, 2009
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Toshiaki Tsuda, Yukihiro Onoda
  • Patent number: 7508133
    Abstract: A discharge lamp includes a glass tube having electrodes with an electron emissive material coated thereon, the electrodes being provided on respective ends of the glass tube, wherein the glass tube has a gas containing a luminescent material sealed therein and has a fluorescent material coated on its inner surface, the glass tube has a diameter less than 6.5 mm and the gas sealed into the glass tube is gases of more than one kind selected from an Ar (argon) gas , a Kr (krypton) gas and a Xe (xenon) gas or a mixed gas mainly made of gases of more than one kind selected from the Ar gas, the Kr gas and the Xe gas. Thus, the discharge lamp can reduce a diameter of its tube and it is able to provide high luminous efficiency.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: March 24, 2009
    Assignee: Sony Corporation
    Inventor: Yukio Hara
  • Patent number: 7489083
    Abstract: The arc tube is provided with a mercury-free arc tube main body that has a discharge light-emitting portion (closed glass sphere), and a cylindrical shroud glass tube that is airtightly integrated with the arc tube main body. In the mercury-free arc tube in which an inert gas is sealed in the shroud glass tube that surrounds the closed glass sphere, in the shroud glass tube, the adjustment is made so as to satisfy the light flux and the life span with respect to the pressure X (atmospheric pressure) of a rare gas sealed in the closed glass sphere, and an amount M (mg/ml) of sealed metal halide.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: February 10, 2009
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Akira Homma, Takeshi Fukuyo, Michio Takagaki
  • Publication number: 20080218078
    Abstract: The invention relates to a cooled high-pressure gas-discharge lamp, at least comprising a cooled envelope (43) that seals off hermetically a discharge chamber (431) filled with a gas, there being, at least in the discharge chamber (431), a non-uniform temperature distribution at the time of the gas discharge, and comprising a cooling means (7) having a coolant, which cooling means (7) produces a directed flow (9) of coolant, there being a liquid coolant acting on the envelope (43) of the lamp, it being possible for the lamp to be operated at a higher power, and the flow (9) of coolant being such that, when the power consumption of the lamp is increased, any devitrification of the envelope (43) of the lamp and any condensation of the gas is substantially prevented.
    Type: Application
    Filed: December 18, 2002
    Publication date: September 11, 2008
    Applicant: Koninklijke Philips Electronics N. V.
    Inventors: Holger Monch, Jan Alfons Julia Stoffels
  • Patent number: 7245075
    Abstract: Metal halide lighting with good color during dimming may be obtained. An appropriate balance of commonly used metal halides (NaI, DyI3, CeI3, CaI2, TlI) is dosed in the lamp. No mercury is used. A higher than typical xenon fill pressure from 50 to 500 Kilopascals may be used to help control thermal properties and voltage. If necessary, modulation of the power at acoustic resonance frequencies may be used to straighten and center the arc. Efficient and pleasant white output is obtained. As the power is reduced, the chromaticity either (1) remains fairly constant or (2) drifts acceptably towards warm pinkish colors. Large factors of attenuation in output can be realized. The lumen output was reduced by at least a factor of twenty in one sample as the power was dimmed from 70 to 20 watts.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: July 17, 2007
    Assignee: Osram Sylvania Inc.
    Inventors: Nancy H. Chen, Joseph A. Olsen
  • Patent number: 7064490
    Abstract: A bulb type electrodeless discharge lamp, comprising a recessed part (102), wherein the maximum diameter of a light emitting tube (101) is 60 to 90 mm and the tube wall load of the light emitting tube (101) is 0.07 to 0.11 W/cm2, and a relation between the diameter Dc of the recessed part (102) and an interval ?h between the top of the recessed part (102) and the top part of the light emitting tube (101) meets the requirement of ?h?1.15×Dc+1.25 [mm].
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: June 20, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kiyoshi Hashimotodani, Takeshi Arakawa, Akira Hochi, Koichi Katase, Yuuji Omata, Yoshihisa Hagiwara
  • Patent number: 7045960
    Abstract: A high-pressure discharge lamp for motor vehicle headlamps having a mercury-free ionizable fill which consists of xenon with a cold filling pressure of at least 2000 hPa and metal halides. The discharge vessel has a tubular section (10) which consists of a transparent ceramic and has an internal diameter which is less than or equal to 2 mm and inside which there are arranged electrodes with a spacing less than or equal to 10 mm.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: May 16, 2006
    Assignee: Patent Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Klaus Gunter
  • Patent number: 6992445
    Abstract: Described is a high intensity discharge lamp including a lamp bulb envelope, first and second electrodes, a seal and a fill situated within the lamp bulb envelope. The lamp bulb envelope is composed of single crystal sapphire tubing. The lamp bulb envelope includes end portions and a central portion, the central portion having a greater diameter than the end portions. The end portions may be a cylindrical tube shape and the central portion is a smooth three-dimensional shape. The first and second electrodes extend through opposite ends of the lamp bulb envelope so that at least a portion of each of the electrodes is situated within the lamp bulb envelope. The seal seals each of the first and second electrodes to an inside wall of the corresponding end of the lamp bulb envelope. A voltage is applied to the first and second electrodes to generate an arc plasma therebetween.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: January 31, 2006
    Assignee: Gem Lighting, LLC
    Inventors: Bernard J. Eastlund, Maurice E. Levis
  • Patent number: 6943498
    Abstract: To provide a high-efficiency and long-life high intensity discharge lamp that is obtained by a configuration in which a neon gas or a neon-based gaseous mixture is filled as a starting-assistance rare gas for an alumina ceramic arc tube, and a filling pressure is set to 13 kPa or more. The high intensity discharge lamp is provided with the alumina ceramic arc tube having a discharge arc tube, alumina ceramic narrow tubes formed at both end portions of the discharge arc tube, electrodes and power feeders, the electrodes and the power feeders being arranged to form spaces in the narrow tubes. The discharge arc tube is filled with the neon gas or the neon-based gaseous mixture as the starting-assistance rare gas at a filling pressure of 13 kPa or more.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: September 13, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiharu Nishiura, Shigefumi Oda, Masanori Higashi, Shunsuke Kakisaka, Hiroshi Enami
  • Patent number: 6919685
    Abstract: This invention comprises the use of microspheres containing ionizable gas in a gas discharge (plasma) display, photons for the gas discharge within a microsphere exciting a phosphor such that the phosphor emits wavelengths in both the visible or invisible spectrum. The invention is described in detail hereinafter with reference to an AC gas discharge (plasma) display.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: July 19, 2005
    Assignee: Imaging Systems Technology INC
    Inventors: Timothy M. Henderson, Donald K. Wedding
  • Patent number: 6913503
    Abstract: A high pressure discharge lamp includes a quartz glass bulb and a pair of electrodes. Each electrode of the pair of electrodes is disposed so as to be opposite the other in the quartz glass bulb. The quartz glass bulb of the high pressure discharge lamp contains at least mercury and a halogen gas which are airtightly sealed in the quartz glass bulb. The partial pressure of oxygen (O) in the quartz glass bulb is about 2.5×10?3 Pa or less and the partial pressure of the halogen gas in the quartz glass bulb is in the range between about 1×10?6 ?mol/mm3 and 1×10?8 ?mol/mm3. The pair of electrodes contain potassium oxide in the range between about 20 ppm and 40 ppm.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: July 5, 2005
    Assignee: NEC Microwave Tube, Ltd.
    Inventors: Kazuhisa Nishida, Toshimoto Makino
  • Patent number: 6861807
    Abstract: The invention relates to a high-pressure gas discharge lamp, particularly a motorcar lamp, comprising a bulb including at least two neck portions and a vacuum-tight discharge vessel of quartz glass, at least two electrodes projecting into the discharge vessel, and a filling in the discharge vessel which, in the operating state, is in a discharge state. Such lamps are used, in particular, in headlights of motorcars. In order to ensure that the arc of the high-pressure gas discharge lamp generates a higher luminescence in a small area, and the lamp can be used as a light source in motorcar headlights, the discharge vessel of the high-pressure gas discharge lamp in accordance with the invention encloses a discharge space having a width B below 4 mm and a length C below 8 mm, and the filling comprises NaI, ScI3, Xe, ZnI3 and is free of Hg. Surprisingly it has been found that the use ZnI2 in the filling causes the arc to generate a higher luminescence in the area of the arc axis per dimension of the arc.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: March 1, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Matthias Born, Rüdiger Jost
  • Patent number: 6803724
    Abstract: A bulb for an electrodeless lamp comprises: an envelope through which the light can be permeated; a filled material filled in the envelope for emitting the light as being excited by high frequency energy; and buffer gas, wherein the buffer gas comprises first buffer gas, and second buffer gas having a partial pressure less than 1% of the partial pressure of the first buffer gas in order to reduce a discharging voltage and lighting time, and thereby, the re-lighting after putting out the light can be performed easily and the re-lighting time is reduced to improve the convenience of the user and the reliability of electrodeless lamp.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: October 12, 2004
    Assignee: LG Electronics, Inc.
    Inventors: Joon-Sik Choi, Yong-Seog Jeon, Hyo-Sik Jeon, Hyun-Jung Kim, Ji-Young Lee, Byeong-Ju Park
  • Patent number: 6720731
    Abstract: A short arc mercury discharge lamp including an arc tube filled with at least mercury and a rare gas, a cathode and an anode positioned opposite to each other within the arc tube, the cathode having an tapered area which tapers in a direction towards the anode and a projection which protrudes from the tapered area in a direction towards the anode. The amount of mercury to be added in the arc tube is in a range of 0.2≦n≦52, where n is the weight (mg/cm3) of the mercury per unit of volume, and a pressure of the rare gas to be added in the arc tube is in a range of 0.1≦p≦800, where p is the pressure (kPa) of the rare gas at an ambient temperature of 25° C.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: April 13, 2004
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Yukio Yasuda, Yoshinoir Aiura
  • Patent number: 6639343
    Abstract: A mercury-free metal halide lamp includes an arc tube including a pair of electrodes inside the tube. In the arc tube, a rare gas and a metal halide are contained, and no mercury is contained. The mercury-free metal halide lamp is horizontally operated such that the pair of electrodes is substantially horizontal. The mercury-free metal halide lamp further includes magnetic field applying means for applying a magnetic field including a component substantially perpendicular to a straight line connecting heads of the pair of electrodes in a substantially vertical direction. The density of halogen atoms evaporated during steady-state operation with respect to unit inner volume of the arc tube is 20 &mgr;mol/cc or more.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: October 28, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kiyoshi Takahashi, Yuriko Kaneko, Hideaki Kiryu, Masato Yoshida
  • Patent number: 6635991
    Abstract: The invention relates to a method of adjusting a desired spectrum of light emitted by a gas discharge lamp during its operation, said gas discharge lamp comprising a first ionizable substance and a second substance which is less readily ionizable than the first substance. According to the invention, the gas discharge lamp is operated such that gases of both substances cans be excited, while the partial pressure of the first substance is adjusted in dependence on the desired spectrum. For this purpose, for example, the current through the lamp may be modulated. In an alternative embodiment, this is suitably achieved in that the partial mercury pressure is varied, for example through an adjustment of the temperature of a mercury amalgam present in the gas discharge lamp. The invention also relates to a gas discharge lamp whose color can be varied during its operation, and to a luminaire provided with a supply for such a lamp.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: October 21, 2003
    Assignee: U.S. Philips Corporation
    Inventors: Levinus P. Bakker, Gerardus M. W. Kroesen
  • Patent number: 6611102
    Abstract: The present invention provides a tungsten-halogen light bulb having an arc tube with a seal portion at one end. A filament is provided in the interior of the arc tube, and a basic gas mainly comprising at least either gaseous xenon or gaseous krypton is filled in the arc tube. When V (V) denotes a rated voltage of the tungsten-halogen light bulb, P(MPa) denotes a filling pressure of the basic gas at a room temperature, and Xe vol. % and Kr vol. % respectively denote composition ratios of the gaseous xenon and of the gaseous krypton, the following formulas (1) and (2) are satisfied simultaneously, in which ‘%’ means ‘volume %’. V≧100 (Volt)  (1) P≧0.7+{0.1×(Kr%/(Kr%+Xe%))}  (2) In these formulas, Kr %+Xe %=100(%), 0≦Kr %≦100, and 0≦Xe %≦100. Accordingly, a crack at the seal portion of the arc tube is prevented and the lifetime is improved.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: August 26, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mituhiko Kimoto, Taku Ikeda, Hiroshi Sugimoto, Takeshi Fujikawa
  • Patent number: 6608440
    Abstract: A high pressure discharge lamp includes a quartz glass bulb and a pair of electrodes. Each electrode of the pair of electrodes is disposed so as to be opposite the other in the quartz glass bulb. The quartz glass bulb of the high pressure discharge lamp contains at least mercury and a halogen gas which are airtightly sealed in the quartz glass bulb. The partial pressure of oxygen (O) in the quartz glass bulb is about 2.5×10−3 Pa or less and the partial pressure of the halogen gas in the quartz glass bulb is in the range between about 1×10−6 &mgr;mol/mm3 and 1×10−8 &mgr;mol/mm3. The pair of electrodes contain potassium oxide in the range between about 20 ppm and 40 ppm.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: August 19, 2003
    Assignee: NEC Microwave Tube, Ltd.
    Inventors: Kazuhisa Nishida, Toshimoto Makino
  • Patent number: 6603267
    Abstract: A low-pressure gas discharge lamp having a gas discharge vessel containing a gas filling including a copper compound. The copper compound is selected from the oxides, chalcogenides, hydroxides, hydrides and the metalorganic compounds of copper. In addition to the copper compound, the gas filling includes a buffer gas such as argon, and may also include a thallium compound and/or a copper halogenide.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: August 5, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Rainer Hilbig, Robert Peter Scholl, Achim Koerber, Johannes Baier
  • Patent number: 6593692
    Abstract: A short-arc high pressure discharge lamp with a shorter distance between electrodes than a conventional lamp that realizes a long life of at least 3000 hours and suppresses the arc jump phenomenon is disclosed. In the high pressure discharge lamp, an electrode tip 124 is transformed into a semi-sphere by fusing and processing an electrode rod 122 and a coil 123 wound around an end of the electrode rod 122. A thickness “de” and a diameter “&phgr;e” of the semi-sphere are each set in a range predetermined in correspondence with a power input (W) of the short-arc high pressure discharge lamp.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: July 15, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiki Kitahara, Takashi Tsutatani, Toshiyuki Shimizu
  • Patent number: 6570329
    Abstract: A high pressure discharge lamp includes a quartz glass bulb having a sealing portion; and a pair of electrodes. Each electrode of the pair of electrodes is disposed so as to be opposite the other in the quartz glass bulb. The quartz glass bulb of the high pressure discharge lamp contains at least mercury and a halogen gas. The partial pressure of oxygen (O) in the quartz glass bulb is about 2.5×10−3 Pa or less and the partial pressure of the halogen gas in the quartz glass bulb is in the range between about 1×10−8 &mgr;mol/mm3 and 1×10−7 &mgr;mol/mm3.
    Type: Grant
    Filed: March 9, 2001
    Date of Patent: May 27, 2003
    Assignee: NEC Microwave Tube, Ltd.
    Inventor: Kazuhisa Nishida
  • Publication number: 20030085655
    Abstract: Low-pressure mercury discharge lamp (1) comprising an at least partly substantially cylindrical discharge vessel (3) having a diameter D, wherein two electrodes are present near respective ends of said discharge vessel (3), which discharge vessel (3) is filled with a mixture of inert gasses having a pressure P and which discharge vessel (3) contains an amount of mercury, wherein D×P is at least 5.2 mPa. The invention is based on the novel understanding that a higher filling pressure of the inert gas mixture causes a lower mercury consumption in the lamp (1).
    Type: Application
    Filed: October 1, 2002
    Publication date: May 8, 2003
    Inventors: Adrianus Johannes Hendricus Petrus Van Der Pol, Augustinus Johannes Henricus Van Der Heijden, Michiel Jacobus Van Der Meer
  • Publication number: 20030062832
    Abstract: To provide a high-efficiency and long-life high intensity discharge lamp that is obtained by a configuration in which a neon gas or a neon-based gaseous mixture is filled as a starting-assistance rare gas for an alumina ceramic arc tube, and a filling pressure is set to 13 kPa or more. The high intensity discharge lamp is provided with the alumina ceramic arc tube having a discharge arc tube, alumina ceramic narrow tubes formed at both end portions of the discharge arc tube, electrodes and power feeders, the electrodes and the power feeders being arranged to form spaces in the narrow tubes. The discharge arc tube is filled with the neon gas or the neon-based gaseous mixture as the starting-assistance rare gas at a filling pressure of 13 kPa or more. This prevents a discharge arc from jumping from tip portions of the electrodes to the spaces at starting of the lamp, and avoids occurrence of cracks and breakages in the narrow tubes.
    Type: Application
    Filed: September 11, 2002
    Publication date: April 3, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiharu Nishiura, Shigefumi Oda, Masanori Higashi, Shunsuke Kakisaka, Hiroshi Enami
  • Publication number: 20030042853
    Abstract: A short arc mercury discharge lamp including an arc tube filled with at least mercury and a rare gas, a cathode and an anode positioned opposite to each other within the arc tube, the cathode having an tapered area which tapers in a direction towards the anode and a projection which protrudes from the tapered area in a direction towards the anode. The amount of mercury to be added in the arc tube is in a range of 0.2≦n≦52, where n is the weight (mg/cm3) of the mercury per unit of volume, and a pressure of the rare gas to be added in the arc tube is in a range of 0.1≦p≦800, where p is the pressure (kPa) of the rare gas at an ambient temperature of 25° C.
    Type: Application
    Filed: August 28, 2002
    Publication date: March 6, 2003
    Applicant: USHIODENKI KABUSHIKI KAISHA
    Inventors: Yukio Yasuda, Yoshinori Aiura
  • Patent number: 6353289
    Abstract: A metal halide discharge lamp which essentially permits disusing mercury is provided. The metal halide discharge lamp comprises a refractory and transparent hermetic vessel, a pair of electrodes fixed to the hermetic vessel, and a discharge medium sealed in the hermetic vessel and containing a first halide, a second halide, and a rare gas. The first halide is a halide of a metal which achieves a desired light emission. The second halide has a relatively high vapor pressure, being at least one halide of a metal which is unlikely to emit a visible light compared with the metal of the first halide and acts as a buffer gas.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: March 5, 2002
    Assignee: Harison Toshiba Lighting Corp.
    Inventors: Toshihiko Ishigami, Kiyoshi Saita, Mikio Matsuda, Toshio Hiruta
  • Publication number: 20020017860
    Abstract: A high pressure discharge lamp includes a quartz glass bulb and a pair of electrodes. Each electrode of the pair of electrodes is disposed so as to be opposite the other in the quartz glass bulb. The quartz glass bulb of the high pressure discharge lamp contains at least mercury and a halogen gas which are airtightly sealed in the quartz glass bulb. The partial pressure of oxygen (O) in the quartz glass bulb is about 2.5×10−3 Pa or less and the partial pressure of the halogen gas in the quartz glass bulb is in the range between about 1×10−6 &mgr;mol/mm3 and 1×10−8 &mgr;mol/mm3. The pair of electrodes contain potassium oxide in the range between about 20 ppm and 40 ppm.
    Type: Application
    Filed: July 5, 2001
    Publication date: February 14, 2002
    Applicant: NEC Corporation
    Inventors: Kazuhisa Nishida, Toshimoto Makino
  • Publication number: 20020008471
    Abstract: A discharge bulb including: an arc tube having a light emitting portion constructed in a manner that a light emitting substance is enclosed therein by pinch-sealing the arc tube, and discharge electrodes are oppositely arranged therein; and a shroud glass tube hermetically sealing and covering the arc tube, so as to form a space between the shroud glass tube and the arc tube. And a water content or pressure of gas enclosed in the sealed space is specified.
    Type: Application
    Filed: June 13, 2001
    Publication date: January 24, 2002
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Takeshi Fukuyo, Shinichi Irisawa, Yoshitaka Ohshima
  • Publication number: 20010015621
    Abstract: An alternating current driven type plasma display device characterized in that a discharge gas charged in a discharge space where discharge takes place consists of a xenon gas alone and the discharge gas has a pressure of 9.0×104 Pa or lower.
    Type: Application
    Filed: January 11, 2001
    Publication date: August 23, 2001
    Applicant: Sony Corporation
    Inventor: Kazunao Oniki
  • Patent number: 6255782
    Abstract: A flat type fluorescent lamp, obtaining an improvement in efficiency of brightness and being adjustable in an emitted light amount thereof, while maintaining a uniform light emission across the surface thereof, and illuminating with no use of mercury therein, comprising a sealed container being defined between a front glass substrate and a rear glass substrate which are hermetically bonded to each other, so as to enclose a rare gas as discharge gas therein, edge electrodes, having width from 2.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: July 3, 2001
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Yasunao Kuroda, Kenichiro Matsumoto, Mitsuya Ozaki
  • Patent number: 6133694
    Abstract: A high pressure lamp bulb adapted to simultaneously emit distinct emission spectra of a desired wavelength, the lamp bulb comprising an envelope for containing a fill material under pressure and a fill material, the fill material including a material capable of forming at least two dissimilar excimer species in an amount to provide a total fill pressure no less than about 750 Torr at room temperature.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: October 17, 2000
    Assignee: Fusion UV Systems, Inc.
    Inventors: Miodrag Cekic, Jerome Frank, Svetozar Popovic
  • Patent number: 6008580
    Abstract: A plurality of discharge electrodes (23), (24) are formed on a first substrate (22) at an interval between the adjacent electrodes set to 50 .mu.m or smaller. A fluorescent layer (26) is formed on a second substrate (25 opposed to the first substrate (22). A sealed vessel (28) is formed by locating the first and second substrates (22) and (25) so that the electrodes (23) and (24) and the fluorescent layer (26) should be located on their inner sides. A predetermined gas is introduced in the sealed vessel (28) so that a pressure of the introduced gas should be within the range from 0.8 to 3.0 atmospheric pressure. Ultraviolet rays are produced by plasma discharge and make the fluorescent layer (26) emit light which is employed as illumination light.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: December 28, 1999
    Assignee: Sony Corporation
    Inventors: Suehiro Nakamura, Hiroshi Mori
  • Patent number: 5818167
    Abstract: An electrodeless high intensity discharge lamp including a sealed light-transmissive envelope, a volatilizable chemical fill and an inert gas or nitrogen within the envelope. The chemical fill includes as a primary active component phosphorus or a volatilizable compound of phosphorus. The inert gas or nitrogen is at a pressure of less than 760 torr at ambient temperature, and assists in starting the lamp. Sufficient mercury may be added to the lamp fill to improve resistive heating, but addition of mercury is not required for emission. Sulfur, a sulfur compound, or a metal halide may be added to the fill as a secondary active component. The lamp envelope is coupled to a high frequency power source to produce a light emitting plasma discharge within the envelope.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: October 6, 1998
    Assignee: Osram Sylvania Inc.
    Inventors: Walter P. Lapatovich, Scott J. Butler, Jason R. Bochinski
  • Patent number: 5808398
    Abstract: A metal halide lamp provided with an outer bulb having a volume V.sub.bu in which a discharge vessel with a volume V.sub.ob and having a ceramic wall is arranged, which vessel contains mercury, at least one halide, and also a rare gas having a filling pressure P.sub.ob. The relation P.sub.ob *V.sub.ob /V.sub.bu .ltoreq.6 mbar is satisfied.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: September 15, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Jan A. J. Stoffels, Willem J. Van Den Hoek
  • Patent number: 5739636
    Abstract: A cadmium discharge lamp which can emit line spectra with wavelengths of 214.+-.2 nm with high power is achieved by encapsulating metallic cadmium, in an amount producing a pressure in stationary lighting operation in the range from 2 kPa to 13.7 kPa, together with at least one of the rare gases xenon, krypton, argon and neon, in a temperature-controlled arc tube which is provided with electrodes located adjacently opposite one another, and by operating the lamp such that J/P is in the range from 1.4 to 75, where J is the discharge current in stationary lighting operation in amperes and the P is the cadmium pressure in stationary lighting operation.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: April 14, 1998
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Akiyasu Yamaguchi, Yukio Yasuda, Hiromitsu Matsuno, Tatsushi Igarashi
  • Patent number: 5686793
    Abstract: An excimer lamp utilizing a high pressure fill. The fill includes a halogen at an operating pressure of greater than about 350 torr or the combination of a halogen and a rare gas at a total operating pressure of greater than about 2.5 atmospheres.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: November 11, 1997
    Assignee: Fusion UV Systems, Inc.
    Inventors: Brian Turner, James T. Dolan
  • Patent number: 5504391
    Abstract: An excimer lamp utilizing a high pressure fill. The fill includes a halogen at an operating pressure of greater than about 350 torr or the combination of a halogen and a rare gas at a total operating pressure of greater than about 2.5 atmospheres.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: April 2, 1996
    Assignee: Fusion Systems Corporation
    Inventors: Brian Turner, James T. Dolan
  • Patent number: 5481159
    Abstract: A discharge lamp uses resonance lines which are emitted by ions in an excitation state and has a high short wave ultraviolet ray output. The lamp is provided with a pair of electrodes, having a reciprocal spacing of equal to or smaller than 12 mm, and is of the electrode-stable type. As the major emission material, cadmium is encapsulated in a quantity permitting a partial pressure P in operation of 3.times.10.sup.3 Pa to 1.3.times.10.sup.5 Pa. The lighting operation is performed in a state in which a lamp current J.sub.L fulfills the following condition (a):0.7<J.sub.L /P.sup.1/4 <15.0. Condition (a)As an alternate major emission material, zinc can be encapsulated in a quantity permitting a partial pressure P in operation of 1.times.10.sup.3 Pa to 0.3.times.10.sup.5 Pa ant the lighting operation is performed in a state in which a lamp current J.sub.L fulfills the following condition (b):0.7<J.sub.L /P.sup.1/4 <16.9.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: January 2, 1996
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Tatsumi Hiramoto, Tatsushi Igarashi, Hiromitsu Matsuno, Yukio Yasuda, Akiyasu Yamaguchi
  • Patent number: RE45342
    Abstract: In order to achieve a discharge lamp suited to operate under reduced nominal power of e.g. 20-30 W, a lamp is proposed with two electrodes (24) arranged at a distance in a discharge vessel (20, 120) for generating an arc discharge. The discharge vessel (20,120) has a filling with a substantially free of mercury and comprises a metal halide and a rare gas. The lamp (10, 110) further comprises an outer bulb (18) arranged around the discharge vessel at a distance (d2). The outer bulb (18) is sealed and has a gas filling of a thermal conductivity (?). The inner diameter (d1) of the discharge vessel is preferably in a range from 2-2.7 mm. The wall thickness (w1) is in a range from 1.4-2 mm. A heat transition coefficient (?/d2) is calculated as thermal conductivity (?) at 800° C. of the outer bulb filling divided by the distance (d2). The so-defined heat 10 transition coefficient is below 150 W/(m2K).
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: January 20, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Michael Haacke, Martin Stroesser