Electromagnetic Influenced Discharge Device Patents (Class 315/344)
  • Publication number: 20150014296
    Abstract: The present invention relates to a heat generating device using an arc discharge reactor. One object of the present invention is to not only discharge a high brightness arc but also to make an arc which discharges at an even higher brightness when a magnet is placed nearby.
    Type: Application
    Filed: October 8, 2012
    Publication date: January 15, 2015
    Applicant: Gear Technology Co., Ltd.
    Inventors: Kisung Kim, Hee Jae Kim
  • Patent number: 8901842
    Abstract: An induction RF fluorescent lamp includes a lamp envelope with a re-entrant cavity both covered on a partial vacuum side with phosphor and filled with a working gas mixture; a power coupler on the non-vacuum side of said re-entrant cavity comprising a ferromagnetic core overwound with at least one turn of an electrical conductor; an electronic ballast, wherein the ballast converts mains frequency voltage and current to a power coupler frequency voltage and current, the electronic ballast providing the voltage and current to the power coupler through at least two of a plurality of electrical terminals of the electronic ballast; a capacitor electrically connected between the ferromagnetic core and at least one of the plurality of electrical terminals of the electronic ballast, wherein the magnitude of the impedance of the capacitor is high at the mains frequency and the magnitude of the impedance of that same capacitor is low at the operating frequency of the RF fluorescent lamp.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: December 2, 2014
    Assignee: Lucidity Lights, Inc.
    Inventor: Victor D. Roberts
  • Patent number: 8829823
    Abstract: The invention relates to an induction switch comprising a discharge container filled with gas and a coaxially interleaved electrode device, and to a corresponding method for commutating high voltages. The inductive production of a dense plasma and the subsequent flooding of an electrode gap with the plasma ions produced enables the commutation of high currents in the kiloamp range when there are blocking voltages of over 500 kV. Such an induction switch only requires a single discharge gap, can be used over a very wide voltage range, and avoids the problem of electrode erosion as a result of the electrode-free energy coupling.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: September 9, 2014
    Assignee: Johann Wolfgang Goethe—Universität Frankfurt am Main
    Inventors: Christian Teske, Joachim Jacoby
  • Patent number: 8698413
    Abstract: An induction RF fluorescent lamp configuration provides reduced EMI, including a lamp envelope with a re-entrant cavity both covered on the partial vacuum side with phosphor and filled with a working gas mixture, a tubular ferromagnetic core on the non-vacuum side said re-entrant cavity wound directly on the said core with two windings having different numbers of turns, a first active winding having one end connected to an RF ballast and the other end connected to local ground, and a second passive winding having one end grounded and the other end free.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: April 15, 2014
    Assignee: Lucidity Lights, Inc.
    Inventors: Valery A. Godyak, Jakob Maya, James N. Lester
  • Patent number: 8692467
    Abstract: Plasma processing apparatuses and techniques for processing substrates, which include the use of synchronized RF pulsing of a first RF signal and a delayed-and-shortened second RF signal. The first RF signal may be the primary plasma-generating RF signal and the second RF signal may be the RF bias signal or vice versa. Alternatively or additionally, the first RF signal may be the high frequency RF signal and the second RF signal may be the lower frequency RF signal. Either the first RF signal or the second RF signal may act as the master, with the other acting as the slave signal. Alternatively, an external circuit may be employed as a master to control both the first RF signal and the second RF signal as slave signals. Track-and-hold techniques and circuits are provided to ensure accurate measurement for process control and other purposes.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: April 8, 2014
    Assignee: Lam Research Corporation
    Inventors: Neil Martin Paul Benjamin, Arthur H. Sato
  • Patent number: 8502482
    Abstract: The present invention discloses an improved compact induction lamp, which includes a lamp bulb coated with a phosphor layer on its inner wall and contains inert gas and mercury vapor. The lamp bulb is connected to a housing and mounted to a lamp base. The housing may include a control circuit. A magnetic ring located within a ring cover surrounded the lamp bulb and enclosed one cross section of the lamp bulb. A wire coil wrapped around the magnetic ring is connected with the control circuit and to the lamp base, which generates an electromagnetic field to lighten the lamp. A double wall exhaust tube containing mercury amalgam is disposed of in the housing at the lamp base to provide mercury vapor to the inner space of the lamp bulb. The double wall exhaust tube provides a mean to prevent the amalgam from penetrating into the lamp bulb and allows the lamp to be mounted in any direction the lamp may be operated.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: August 6, 2013
    Inventor: John Yeh
  • Patent number: 8395333
    Abstract: An electro magnetic ballast (110) for a gas discharge lamp (2) comprises: input terminals (3), for receiving a mains voltage; lamp connector terminals (4), for receiving a lamp; a controllable semiconductor switch (26) coupled in parallel to the lamp connector terminals; a current sensor (127) connected in series with the controllable switch (26); and a control circuit (28) for controlling the controllable switch (26) and responsive to the current sensor (127). When operating in a normal mode, the control circuit (28) is responsive to a current sense signal received from the current sensor to switch the controllable switch (26) ON if said current sense signal indicates a current flowing in the controllable switch (26) and to switch the controllable switch (26) OFF if said current sense signal indicates that no current is flowing in the controllable switch (26).
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: March 12, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Marcel Beij, Rien M. Mertens
  • Patent number: 8264154
    Abstract: Embodiments of the present invention generally provide methods and apparatus for pulsed plasma processing over a wide process window. In some embodiments, an apparatus may include an RF power supply having frequency tuning and a matching network coupled to the RF power supply that share a common sensor for reading reflected RF power reflected back to the RF power supply. In some embodiments, an apparatus may include an RF power supply having frequency tuning and a matching network coupled to the RF power supply that share a common sensor for reading reflected RF power reflected back to the RF power supply and a common controller for tuning each of the RF power supply and the matching network.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: September 11, 2012
    Assignee: Applied Materials, Inc.
    Inventors: Samer Banner, Valentin Todorow, Kartik Ramaswamy
  • Patent number: 8232730
    Abstract: An electrodeless plasma lamp having a bulb containing a fill that forms a light-emitting plasma is described. The lamp includes a power amplifier to provide radio frequency power to the fill at a frequency in the range of about 50 MHz to 10 GHz and the power amplifier is configured to operate in at least two classes of operation. Control electronics of the lamp is configured to change the class of operation of the power amplifier during operation of the plasma lamp. For example, the power amplifier may be configured to operate as a class A/B amplifier during at least a first mode of operation and a class C amplifier during at least a second mode of operation.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: July 31, 2012
    Assignee: Luxim Corporation
    Inventors: Marc DeVincentis, Paul Ralston, Gregg Hollingsworth, Jae Won Kim
  • Patent number: 8169162
    Abstract: The present invention is directed to an apparatus for suppressing abnormal electrical discharge used for vacuum equipment which supplies power from a high-frequency power source to a plasma reaction chamber and executes a film formation process, provided with a power controller for controlling the high-frequency power source based on a deviation between a power command value and a power feedback value, and a cutoff controller for cutting off the power supply from the high-frequency power source to the plasma reaction chamber, based on a detection of the abnormal electrical discharge within the plasma reaction chamber. The cutoff controller exercises a first handling cutoff control and a second handling cutoff control, each having a different cutoff time. The first handling cutoff allows ions to remain in the plasma reaction chamber, and exercises the cutoff control over the high-frequency power source within a time duration which allows an arcing element to disappear.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: May 1, 2012
    Assignee: Kyosan Electric Mfg. Co., Ltd.
    Inventors: Itsuo Yuzurihara, Atsushi Takayanagi
  • Patent number: 8154216
    Abstract: Described is a plasma electrode-less lamp. The device comprises an electromagnetic resonator and an electromagnetic radiation source conductively connected with the electromagnetic resonator. The device further comprises a pair of field probes, the field probes conductively connected with the electromagnetic resonator. A gas-fill vessel is formed from a closed, transparent body, forming a cavity. The gas-fill vessel is not contiguous with (detached from) the electromagnetic resonator and is capacitively coupled with the field probes. The gas-fill vessel further contains a gas within the cavity, whereby the gas is induced to emit light when electromagnetic radiation from the electromagnetic radiation source resonates inside the electromagnetic resonator, the electromagnetic resonator capacitively coupling the electromagnetic radiation to the gas, which becomes a plasma and emits light.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: April 10, 2012
    Assignee: Topanga Technologies, Inc.
    Inventors: Frederick Matthew Espiau, Mehran Matloubian
  • Patent number: 7954955
    Abstract: A light engine for image display projectors has a plurality of monochromatic light sources, typically red, blue and green, combined into one light generation device powered by microwaves pulsed at 3-5 KHz rates. The light engine has a microwave power supply, microwave coupling cavity, a microwave coupler coupling a microwave signal from the microwave power supply to the microwave coupling cavity, and the plurality of monochromatic light sources disposed in the microwave coupling cavity and powered by the microwave signal. The microwave coupling cavity includes a plurality of resonance points, each of the monochromatic light sources being located respectively at one of the resonance points.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: June 7, 2011
    Inventors: Bernard John Eastlund, Sherrie R. Eastlund, legal representative
  • Patent number: 7902766
    Abstract: A plasma lighting system comprises a resonator, a bulb received in the resonator and containing a discharge material therein for emitting light in accordance with the discharge material is exited as a plasma state, and a dielectric mirror disposed at one side of the bulb and formed of a spontaneous reflective material for spontaneously reflecting light generated from the bulb. The dielectric mirror can be included or excluded, and can smoothly reflect light without an additional reflection coating layer. The dielectric mirror is prevented from being damaged even in a high temperature, and thus a lowering of an optical efficiency is prevented when used for a long time.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: March 8, 2011
    Assignee: LG Electronics Inc.
    Inventors: Ji-Young Lee, Joon-Sik Choi
  • Patent number: 7863988
    Abstract: A microwave signal generator includes a magnetron to generate a microwave signal, a coupler to receive the microwave signal generated by the magnetron and to send the microwave signal to a load; and a band-pass filter to receive the microwave signal from the coupler and to filter the microwave signal to obtain a signal from an oscillation frequency band of the magnetron. The band-pass filter feeds the signal from the oscillation frequency band back to the magnetron in order to fix an oscillation frequency of the magnetron and is a DR (Dielectric Resonator) filter.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: January 4, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seung Won Baek, Chae Hyun Baek, Yong Soo Lee, Jin Joo Choi
  • Patent number: 7791037
    Abstract: A radiation detection device comprising a plasma display panel (PDP) with a multiplicity of radiation detection pixels, each radiation detection pixel being defined by a hollow elongated Plasma-tube filled with an ionizable gas. Arrays of Plasma-tubes are positioned on a suitable base such as a substrate and used to inspect and detect radiation from a selected object. Each Plasma-tube may be of any suitable geometric configuration and may be used alone or in any combination with one or more Plasma-shells, such as a Plasma-disc, Plasma-dome, and/or Plasma-sphere. Luminescent material may be positioned near or on each Plasma-tube or Plasma-shell to provide or enhance light output. A flexible base substrate may be used to wrap a layer or blanket of radiation detection Plasma-tubes about the selected object. The substrate base may comprise an elongated rod that is used as a probe to detect radiation from an object. An object may be passed through a ring or a cylinder of Plasma-tubes.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: September 7, 2010
    Assignee: Imaging Systems Technology
    Inventors: Carol Ann Wedding, Thomas J. Pavliscak
  • Patent number: 7737613
    Abstract: An electrodeless lamp assembly includes a tubular lamp envelope, at least one core having a closed-loop body disposed so as to surround a core mounting portion of the tubular lamp envelope. The core includes an indented coil winding section formed by an indentation formed in an inner side section of the closed-loop body adjacent to a centrally located opening. The electrodeless lamp assembly further includes an induction coil wound around the indented coil winding section of the core.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: June 15, 2010
    Assignee: U.S. Energy Technologies, Inc.
    Inventor: Byung Il Ham
  • Patent number: 7626835
    Abstract: A plasma lighting system comprising a storage unit for storing duty ratios of first and second switching signals according to each material within a bulb by an experiment, a controlling unit for detecting an optimal duty ratio from the storage unit and outputting the first and second switching signals with the same phase corresponding to the detected duty ratio, and a converting unit for converting a direct current voltage into an alternating current voltage consisting of a positive square wave and a negative square wave according to the first and second switching signals, and a method for controlling the same.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: December 1, 2009
    Assignee: LG Electronics Inc.
    Inventors: Joon-Sik Choi, Yun-Chul Jung
  • Patent number: 7531967
    Abstract: The invention provides a power supply or drive circuit for a pulsed flashlamp which utilizes a two-core component having common windings as both an inductor for arc mode drive and for breakdown triggering of the lamp. Discharge of a capacitor through the inductor and lamp is controlled by a high-speed semiconductor switch which is turned on and off by a suitable control, current flowing from the inductor through a one-way path including the lamp when the switch is off. The control maintains the ratio of the power variation through the lamp to the average power through the lamp substantially constant. The controls may also be utilized to control output pulse shape. Novel protective features are also provided for circuit components during turn on periods for the switch.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: May 12, 2009
    Assignee: Palomar Medical Technologies, Inc.
    Inventors: Mikhail Inochkin, Vycheslav V. Togatov, Peter O. Gnatyuk
  • Publication number: 20080315799
    Abstract: An apparatus for preventing leakage of a material inside a bulb for a plasma lighting system comprises a bulb containing a discharge material therein for emitting light as the discharge material becomes a plasma state by an electric field, and a magnetic field forming portion for preventing the discharge material of a plasma state from being leaked by an external electric field of the bulb by forming a magnetic field at a peripheral portion of the bulb. The discharge material is prevented from being leaked out of the bulb even if the bulb is used for a long time, and thus a lifespan of the bulb is prolonged.
    Type: Application
    Filed: March 14, 2006
    Publication date: December 25, 2008
    Inventors: Byoong-Ju Park, Dae-Kyung Kim
  • Publication number: 20080186457
    Abstract: A light source device includes a microwave generating section for generating a microwave, a reflector connected to the microwave generating section, and a microwave electrodeless lamp disposed inside a cavity, the cavity including the reflector and a metallic chamber covering an opening section of the reflector. The chamber includes a tube member having an opening section for communicating the inside and the outside of the cavity to lead a light flux out of the chamber, and a bore diameter, D of the opening section, a length L of the tube member, a wavelength ? of the microwave, and a wavelength ? of the light flux satisfy ?<D?(¼)?, L?(¼) ?, and D+L=(½)?.
    Type: Application
    Filed: January 31, 2008
    Publication date: August 7, 2008
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yutaka TAKADA, Hiroyuki MOTEKI
  • Patent number: 7402954
    Abstract: A high-pressure discharge lamp (1) having a quartz glass discharge vessel (2) enclosing a discharge space (3) with an ionizable filling, wherein a first electrode (4) and a second electrode (40) are present between which a discharge is maintained during lamp operation, wherein a first seal (5) incorporates a first internal electric conductor (6) which connects the first electrode (4) to a first external electric conductor (7) extending from the seal (5) into the exterior, wherein said first seal (5) further incorporates a gas-filled cavity (10), wherein the internal electric conductor (6) is a foil which extends through the cavity (10), and wherein the foil (6) is provided with at least one hole (11).
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: July 22, 2008
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Hubertus Cornelis Maria Van Den Nieuwenhuizen, Johan Leopold Victorina Hendrix, Petrus Hendrikus Antonis
  • Patent number: 7397173
    Abstract: A lighting apparatus using microwave energy comprises, a magnetron disposed inside a casing, for generating microwave energy; a waveguide for guiding microwave energy; a resonator providing a resonant region in which the microwave energy is resonated; a bulb disposed inside the resonator, and filled with a material which emits light, when excited by the microwave energy; and a rear mirror integrally fixed to a rear of the bulb, for forwardly reflecting light which is rearward emitted from the bulb.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: July 8, 2008
    Assignee: LG Electronics Inc.
    Inventor: Byoung-Ok Min
  • Patent number: 7332872
    Abstract: An external electronic control type electrodeless lamp includes a lighting device. The lighting device includes a body having at least a first conductive plate and a second conductive plate. Each conductive plate is electrically connected to an electronic control system external to the lighting device. The body has a plurality of even-numbered sides. The number of the sides of the body is at least four. The conductive plates are mounted on at least two opposite sides of the body. The electronic control system includes a magnetic core that, when energized, creates a magnetic field, and current generated due to change in the magnetic field is supplied to the conductive plates to light the lighting device.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: February 19, 2008
    Assignee: Wujy Lighting Co., Ltd.
    Inventor: Chao-Lin Wu
  • Patent number: 7301283
    Abstract: An arc discharge lamp (60) contains an arc tube (62) containing an arc generating and sustaining medium. The arc tube (62) has at least one press seal (64). Means (66) for coupling electrical energy to the interior of the arc tube includes an electrical current-carrying frame member (68) and in-leads (68a) and (68b) sealed into the lamp stem (90) and connected to a base (not shown). A starting source (70) comprises a sealed cavity (72) formed in the press seal (64). A second fill material is contained within the sealed cavity (72). The starting source (70) emits ultraviolet radiation when the lamp (60) is energized, which assists in initiation of the arc discharge within the interior of the arc tube (62). An electrical energy coupler (74) is provided for coupling electrical energy to the sealed cavity (72).
    Type: Grant
    Filed: March 10, 2007
    Date of Patent: November 27, 2007
    Assignee: Osram Sylvania Inc.
    Inventors: Susan L. Callahan, David M. Hrubowchak
  • Patent number: 7291985
    Abstract: Described is a plasma electrode-less lamp. The device comprises an electromagnetic resonator and an electromagnetic radiation source conductively connected with the electromagnetic resonator. The device further comprises a pair of field probes, the field probes conductively connected with the electromagnetic resonator. A gas-fill vessel is formed from a closed, transparent body, forming a cavity. The gas-fill vessel is not contiguous with (detached from) the electromagnetic resonator and is capacitively coupled with the field probes. The gas-fill vessel further contains a gas within the cavity, whereby the gas is induced to emit light when electromagnetic radiation from the electromagnetic radiation source resonates inside the electromagnetic resonator, the electromagnetic resonator capacitively coupling the electromagnetic radiation to the gas, which becomes a plasma and emits light.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: November 6, 2007
    Assignee: Topanga Technologies, Inc.
    Inventors: Frederick M. Espiau, Mehran Matloubian
  • Patent number: 7271546
    Abstract: This invention aims to decrease the leakage current of a dielectric barrier discharge lamp, and to prevent generation of the luminance slope between both electrodes. Electrodes 3 and 4 are formed in the outer surface of the dielectric barrier discharge lamp 1, and the high voltage side of the high frequency power sources 5 and 6 is connected to the electrodes 3 and 4, respectively. The low voltage side of the high frequency power sources 5 and 6 is connected to the grounding voltage GND. The output voltage waveform of the high frequency power sources 5 and 6 have different phases each other and inverted polarities each other.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: September 18, 2007
    Assignee: Harison Toshiba Lighting Corporation
    Inventor: Hiroki Nakano
  • Patent number: 7180230
    Abstract: An electrodeless fluorescent lamp 10 has an envelope 12 that includes a chamber 14. A core 16 of magnetic material, preferably ferrite, is positioned in the chamber 14 and has a first winding 18 surrounding the core and having first and second lead-in wires 20, 22, attached to a high frequency voltage supply or ballast 24. A second winding 26 surrounds the core 16, respective turns of the second winding 26 being located adjacent turns of the first winding 18 and electrically insulated therefrom. The second winding 26 has a free end 28 and has another end 30 connected to one of the lead-in wires, for example 20. A braided sheath 32 surrounds the other of the lead-in wires 22. The first winding 18 is generally called the RF antenna. The braided sheath 32 is connected to the local ground. This inexpensive solution alone reduces the conductive EMI level sufficiently to pass all existing regulations on such interference with significant reserve.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: February 20, 2007
    Assignee: Osram Sylvania Inc.
    Inventors: Valery A. Godyak, Benjamin M. Alexandrovich, Alexander A. Sapozhnikov
  • Patent number: 7088056
    Abstract: A connection wire 110 extends from an end of an induction coil 109, along a surface of a base portion 104b of a bobbin 104, which surface is located close to a luminous bulb 101. The connection wire 110 is separated from a sealing portion 118 of an inner tube 120 and an outertube 119.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: August 8, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshiaki Kurachi, Kenji Itaya
  • Patent number: 7081702
    Abstract: An electrodeless lighting system includes: a resonator installed at an outlet of a waveguide guiding microwave energy generated from a magnetron and defining a cavity allowing light to pass therethrough while resonating microwave therein; a bulb positioned in the resonator and enclosing a radiation material for emitting light by the microwave energy; and one or plural microwave concentrating units installed at the inner circumferential surface of the resonator and concentrating microwave energy discharged from the outlet of the waveguide to the bulb. By concentrating microwave to electrodeless plasma bulb positioned inside the resonator, a stability in an initial lighting and light efficiency can be enhanced.
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: July 25, 2006
    Assignee: LG Electronics Inc.
    Inventor: Seong-Tae Seo
  • Patent number: 7049764
    Abstract: An electrodeless lighting apparatus using microwave and a method for controlling its power can lengthen lifetimes of the magnetron by constantly maintaining power applied to a magnetron of the electrodeless lighting apparatus using microwave. Therefore, when inputted AC voltage is changed, and thus oscillation current applied to a filament of the magnetron is changed, a rate of variability of voltage of the inputted AC power is compensated so that voltage and current applied to the magnetron is constantly maintained.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: May 23, 2006
    Assignee: LG Electronics Inc.
    Inventor: Chang-Sin Park
  • Patent number: 6954037
    Abstract: In the electrodeless lighting system according to the present invention, a position of a stud mounted inside the resonator can be changed, the size of the stud mounted inside the resonator can be changed, or the number of studs can be changed thereby changing distribution of intensity of the electromagnetic field distributed inside the resonator, so that one of the luminescent materials within the first and second bulbs selectively emits light according to the taste of a user or a season. Accordingly, in the present invention, desired light of various kinds can be emitted.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: October 11, 2005
    Assignee: LG Electronics Inc.
    Inventor: Hyun-Soo Hu
  • Patent number: 6933675
    Abstract: An apparatus for blocking ambient air of an electrodeless lighting system comprises: a waveguide including a shaft hole so that a bulb shaft can be penetrated therethrough; a bulb motor mounted on a rear side of the waveguide and connected to a bulb, which is located on a front side of the waveguide, using the bulb shaft for rotating the bulb; and a sealing unit installed between the bulb motor and the waveguide for blocking inflow of ambient air to a direction of the bulb, that is, a sealing structure can be ensured so that the ambient air is not flowed into the light emitting area where the mesh screen is located, and thereby impurities are not flowed into the light emitting area to ensure the clear light emitting conditions, the oxidization of mesh screen can be reduced, and the stability of the lighting apparatus is improved and maintenance cost can be reduced.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: August 23, 2005
    Assignee: LG Electronics Inc.
    Inventor: Seong-Tae Seo
  • Patent number: 6933683
    Abstract: A microwave powered lamp head assembly includes a shutter assembly which may be activated to selectively allow transmission of light from the microwave powered lamp bulb. The shutter assembly allows unrestricted airflow when it is in the closed position so that the active lamp bulb may still be cooled, while preventing the transmission of UV radiation through the shutter. The shutter assembly is in close sealing relation with respect to the optical cavity holding the lamp bulb when in the closed position to minimize the escape of UV radiation.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: August 23, 2005
    Assignee: Nordson Corporation
    Inventors: James M. Borsuk, Edward C. McGhee
  • Patent number: 6919688
    Abstract: A luminous discharge display device having two distinct, independent discharge chambers, stacked vertically; of substantially flat circular shape containing inert gas mixtures, and a central electrode coupled to a power supply which provides ionizing means for the gas. The device utilizes two grooves formed into defining members of the discharge chambers to increase the capacitance along their length due to the inverse relationship between dielectric width and capacitance. Two electrode assemblies are biased out of phase with respect to the main electrode further increasing the capacitance and converging the luminous discharge at that specific point and are fitted into the circular grooves. A clock mechanism moves the electrode assemblies along their respective grooves thus creating a controlled motion of the luminous glowing plasma.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: July 19, 2005
    Inventor: Silviu Turcan
  • Patent number: 6873110
    Abstract: An HID single light emitting point lamp tube switching device is provided for switching the lamp tube between a far light position and a near light position. Initially, a strong current coil and a weak current coil are induced at the same time, so that the HID single light emitting point are moved to the second position, and at end of a time period set in the timer, the strong current coil will be interrupted so that only the weak current coil is actuated to maintain the HID single light emitting point in the second position.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: March 29, 2005
    Inventors: Chin-Fa Yen, Kuo-Pin Yen
  • Patent number: 6873119
    Abstract: A non-rotating electrodeless high-intensity discharge lamp system using circularly polarized microwaves. The lamp system has a first rectangular waveguide to propagate linearly polarized microwaves generated from a microwave source; an input circular waveguide linearly connected to the first rectangular waveguide; a second rectangular waveguide closed at an end thereof, and perpendicularly connected to a circumferential surface of the input circular waveguide; an elliptical waveguide linearly connected to the input circular waveguide such that the major axis of the elliptical waveguide is rotated to a predetermined angle relative to a horizontal surface of the input rectangular waveguide; a second circular waveguide linearly connected to the elliptical waveguide; and a discharge lamp housed in a mesh cover, and supported by the second circular waveguide while being held on a reflecting mirror.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: March 29, 2005
    Assignee: Taewon Electronic Co., Ltd.
    Inventors: Jin-Joong Kim, Jeong-Won Kim, Kyoung-Sub Oh
  • Patent number: 6856092
    Abstract: A lamp 1 has a body 2 of sintered alumina ceramic material and an artificial sapphire window 3. The body 2 is initially molded in green state and the window is pressed into a front recess 4. The combination is fired at a temperature of the order of 1500° C., to fuse the body into a coherent pressure-tight state with the window. After partial cooling to the order of 600° C., a pellet of excitable material is added through a rear, charging aperture 5. A disc 6 of ceramic with frit 7 is placed over the aperture. The disc is irradiated by laser to fuse the frit and the disc to the body, thus sealing the excitable material into the lamp.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: February 15, 2005
    Assignee: ITW, Inc.
    Inventors: Floyd R. Pothoven, Terry A. Pothoven
  • 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
  • Publication number: 20040183481
    Abstract: A microwave powered lamp head assembly includes a shutter assembly which may be activated to selectively allow transmission of light from the microwave powered lamp bulb. The shutter assembly allows unrestricted airflow when it is in the closed position so that the active lamp bulb may still be cooled, while preventing the transmission of UV radiation through the shutter. The shutter assembly is in close sealing relation with respect to the optical cavity holding the lamp bulb when in the closed position to minimize the escape of UV radiation.
    Type: Application
    Filed: February 4, 2004
    Publication date: September 23, 2004
    Applicant: Nordson Corporation
    Inventors: James M. Borsuk, Edward C. McGhee
  • Patent number: 6788012
    Abstract: A simple and less expensive high voltage pulse generating circuit including a low voltage direct current voltage source having one output terminal connected to another output terminal via a series circuit of a first switch with a low withstand voltage, an inductance storing inductive energy and a second switch with a high withstand voltage, and a branch circuit including a free-wheel diode connected between the other output terminal of the direct current voltage source and a common connection point between the first switch and the inductance. After storing inductive energy in the inductance by turning “on” the first and second switches, these first and second switches are turn “off” to commutate the energy stored in the inductance into a capacitive load connected across the second switch to charge the load abruptly and generate a high voltage pulse having a very narrow width without using a complicated and expensive magnetic compression circuit.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: September 7, 2004
    Assignee: NGK Insulators, Ltd.
    Inventors: Takeshi Sakuma, Katsuji Iida
  • Patent number: 6741034
    Abstract: A lamp assembly that comprises a hollow arc discharge light source having a center arc chamber containing an arc generating and sustaining medium and first and second ends with an electrode receiving capillary extending from each end and arrayed along a longitudinal axis. The ends are cylindrical in cross-section. An electrode structure is positioned in each of the capillaries and each of these electrode structures comprises a proximal electrode end projecting into the interior of the center arc chamber, a distal end projecting exteriorly of said capillary and an intermediate section therebetween. A first area of the intermediate section is sealed to the capillary in an hermetic manner and a second area of the intermediate section is exposed to the medium. A tubular shroud surrounds the light source and is coaxial with the longitudinal axis. The shroud has two ends. A pair of spring clips, one at each end of said shroud, mount the light source within the shroud.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: May 25, 2004
    Assignee: Osram Sylvania Inc.
    Inventor: John A. Scholz
  • Patent number: 6734630
    Abstract: A metal halogen electrodeless illumination lamp including a microwave generator coupled via a coupling means with a microwave cavity which contains a discharge bulb, and a microwave screen its function being performed by some part of the microwave cavity walls, which is transparent to optical radiation The discharge bulb contains a fill mixture of metal halogens, such as Bi halide, a mixture of Sn and Al and a mixture of their compounds, which emits visible optical radiation featuring a molecular spectrum.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: May 11, 2004
    Assignees: LG Electronics Inc.
    Inventors: Joon-Sik Choi, Hyung-Joo Kang, Hyo-Sik Jeon, Yong-Seog Jeon, Han-Seok Kim, Yuri Brodsky, Vladimir Vdovin, Sergei Golubev, Nikolai Kovalev, Yuri Kalyazin, Yuri Korotchkov, Andrei Perminov
  • Patent number: 6731074
    Abstract: An electrode-less lamp equipment with higher luminance by higher lamp-cooling efficiency wherein the airflow generated by the blower 9 goes through the ventilation hole 12 and spouts out from the open end of the lamp-cooling nozzle 15 and cools the surface of the electrode-less lamp 1 is provided. The velocity of the airflow is accordingly high around the lamp surface enough to efficiently cool the lamp. This makes it possible to raise the input power density to the lamp and to increase luminance.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: May 4, 2004
    Assignee: ORC Manufacturing Co., Ltd.
    Inventor: Akio Suzuki
  • Patent number: 6696802
    Abstract: A lamp assembly in accordance with the invention includes an electrodeless bulb (14) which is symmetrical about an axis (16) and which contains a light emissive fill which emits light when the bulb is excited by a RF electrical field coupled to the fill; an electrically conductive coupler (18) comprising a plurality of turns (20) which are symmetrical about an axis of the electrically conductive coupler, the turns defining a volume (19) that at least partially contains the bulb; and a conductor (26) connected to a center portion of the electrically conductive coupler with connection of the conductor to the electrically conductive coupler providing a fixing of the coupler relative to the bulb which, when the conductor is connected to a source of RF electrical potential, conducts a RF current producing a RF electrical potential on the electrically conductive coupler that produces the RF electrical field coupled to the light emissive fill.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: February 24, 2004
    Assignee: Fusion UV Systems Inc.
    Inventors: Pedro A. Lezcano, Jonathan D. Barry, Jeffrey K. Okamitsu, Miodrag Cekic
  • Patent number: 6650068
    Abstract: The induction coil core used for an induction coil of a discharge lamp, the discharge lamp including: a bulb containing discharge gas inside; and the induction coil for generating an electromagnetic field with a frequency in a range of 50 kHz to 1 MHz inclusive in the bulb. The core is made of a Mn—Zn polycrystalline ferrite and has a Curie temperature of 270° C. or more.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: November 18, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshiaki Kurachi, Koji Miyazaki, Katsushi Seki, Mamoru Takeda
  • Patent number: 6627879
    Abstract: One illustrative embodiment of a voltage pulser circuit comprises a voltage source producing a first voltage, and a thyratron tube having an anode coupled to the output of the voltage source, a cathode connected to a reference potential and a grid responsive to a grid control voltage to electrically connect the anode to the cathode to thereby cause the first thyratron tube to switch the anode between the first voltage and the reference potential. A pulse-shaping circuit may be connected to the anode of the tube to effectuate desired rise and fall times of the voltage pulses produced by the voltage pulser circuit. Such a voltage pulser circuit is particularly suited for use in connection with the operation of pulsed spectrometer instruments, such as time-of-flight mass spectrometers and the like.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: September 30, 2003
    Assignee: Advanced Research and Technology Institute, Inc.
    Inventors: James P. Reilly, Noah P. Christian
  • Patent number: 6605889
    Abstract: An electrodeless low pressure discharge lamp comprises an envelope made from a straight tube and a reentry cavity sealed to one of tube's ends. The cavity has several hollow ferrite cores separated from each other with a few mm distance. Each ferrite core has an induction coil of few turns wound around the core. Each cavity has a cooling copper tube or rod located inside the ferrite core that removes heat from the cores and dumps the heat into a heat sink welded to the cooling tube/rod thereby keep the temperature of the ferrite cores below their Curie point. Each induction coil is electrically connected to the matching network while all matching networks are connected in parallel to the high frequency power source (driver). Inductively coupled plasmas generated in the envelope by several core/coil assemblies produce axially uniform UV and visible radiation.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: August 12, 2003
    Assignee: Matsushita Electric Works Ltd
    Inventors: Shinichi Anami, Robert Chandler, Oleg Popov
  • Patent number: 6559607
    Abstract: The present invention is a microwave excited electrodeless bulb and a process of generating ultraviolet light with a microwave excited electrodeless bulb. A process of generating ultraviolet light with a microwave excited electrodeless bulb in accordance with the invention includes providing an electrodeless bulb (19) with an envelope (32) containing an ultraviolet emissive material which emits ultraviolet light in response to microwave excitation. The envelope is filled with an ultraviolet emissive material. The envelope has a major internal dimension (30) between ⅓ and ½&lgr; to which a strong field of the microwave excitation is coupled during emission of ultraviolet light with &lgr; being the free space wavelength of the microwave excitation which varies between 2.4 and 2.5 GHz. The strong field is produced by a microwave source having a steady state rated output power of no greater than 0.85 kW. The bulb is rotated at a rotational velocity of at least 20 revolutions per minute.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: May 6, 2003
    Assignee: Fusion UV Systems, Inc.
    Inventors: Robert Ervin, Pedro A. Lezcano, Miodrac Cekjc
  • Patent number: 6528953
    Abstract: An arc discharge lamp comprises an arc chamber having an amalgam tip attached to and communicating with it. The communication comprises a narrow tubular extension that penetrates the amalgam tip for a distance less than the depth of the tip. An amalgam that includes bismuth is contained within the amalgam tip. This construction allows operation of the lamp in any position and prevents the bismuth in the amalgam from penetrating the lamp and poisoning the phosphor.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: March 4, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: Nicolas Pearson, Joseph V. Lima, David C. Wentzel
  • Patent number: 6522085
    Abstract: An electrodeless fluorescent lamp comprises a closed-loop (“tokamak”) envelope, two ferrite cores, and an induction coil that is disposed on the envelope walls inside the closed-loop formed by the envelope. The envelope comprises two straight tubes of the same diameter. All coils' turns have essential the same length and are parallel to each other and to the closed-loop axis. Each ferrite core encircles a segment of each the coil's turn and one connecting tube. The lamp can be operated at driving frequencies of 100-600 kHz and lamp powers of 50-250 W. The ferrite core power losses were 6-8 W when the lamp was operated at a frequency of 200-300 kHz and lamp power of 140-150 W. The lamp light output was 12,500 lumen and luminous efficacy was 87 LPW.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: February 18, 2003
    Assignee: Matsushita Research and Development Laboratories Inc
    Inventors: Oleg A. Popov, Jagannathan Ravi, Robert Chandler, Edward Shapiro