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| Number | Title | Issue Date |
| 7417385 | Systems and method for ignition and reignition of unstable electrical discharges Systems and methods for ignition and reignition of unstable electrical discharges wherein a secondary electrode positioned is between a set of primary electrodes and a high voltage is applied between the secondary electrode and successive ones of the primary electro... | 08/26/2008 |
| 7339330 | Methods and circuits for instant hot restart of high intensity discharge lamps A lamp ballast for operating a high intensity discharge lamp includes an electronic ballast circuit to supply an operating voltage to the discharge lamp, and an igniter circuit to supply starting pulses to the discharge lamp in a cold state and to supply hot restrik... | 03/04/2008 |
| 7151330 | Apparatus and method for generating high voltages using a voltage inversion generator and multiple closed-path ferrites A vector inversion generator utilizes closed-path ferrites to modify the characteristics of the generator. The closed-path ferrites increase an inductance within a portion of the generator and additionally provide a protective shield for associated electronic circui... | 12/19/2006 |
| 7030566 | Circuit arrangement for generating an AC voltage from a DC voltage The invention relates to a self-oscillating inverter circuit, preferably having bipolar transistors in a half-bridge circuit, having a transformer as the feedback means. In contrast to the prior art, the secondary windings of the transformer are not connected in par... | 04/18/2006 |
| 6998608 | FAIMS with non-destructive detection of selectively transmitted ions Disclosed is a high field asymmetric waveform ion mobility spectrometer (FAIMS) with optical based detection of selectively transmitted ions. Light from a light source is directed through an optical port in an electrode of the FAIMS. A light detector is provided for... | 02/14/2006 |
| 6995513 | Coil antenna/protection for ceramic metal halide lamps The invention relates to improvements in high-pressure discharge lamps of the ceramic metal halide type of the Philips MasterColor series having a metal coil wrapped around the discharge vessel and/or at least a portion of the electrode feed through means, and havin... | 02/07/2006 |
| 6924608 | System and method for ignition and reignition of unstable electrical discharges Systems and methods for ignition and reignition of unstable electrical discharges wherein a secondary electrode positioned is between a set of primary electrodes and a high voltage is applied between the secondary electrode and successive ones of the primary electro... | 08/02/2005 |
| 6906461 | Light source device with inner and outer electrodes and liquid crystal display device A light source device includes a discharge tube, a discharge medium sealed inside the discharge tube, and inner and outer electrodes for exciting the discharge medium. The inner electrode is arranged inside the discharge tube. The outer electrode includes a first ou... | 06/14/2005 |
| 6903518 | Discharge lamp device and backlight using the same A discharge lamp device which drives a discharge tube filled with a rare gas and has a first electrode mounted at the inside of the tube and a second electrode mounted at the outside of the tube. The lamp device includes a driving circuit that applies a voltage betw... | 06/07/2005 |
| 6734643 | Light source device A discharge lamp which eliminates the large line noise that forms in discharge lamps during startup while preventing heat loss in the transformer by providing a pair of opposed electrodes for the main discharge and an auxiliary electrode arranged such that it does n... | 05/11/2004 |
| 6674239 | Gas discharge lamp An auxiliary antenna arranged around the discharge vessel of a gas discharge lamp comprising an outer bulb enclosing this discharge vessel is provided on the outer bulb. The advantages of an auxiliary start antenna can thus be enjoyed without being counte... | 01/06/2004 |
| 6552502 | Light source device Light source device which includes a discharge lamp which contains at least 0.15 mg mercury per cubic millimeter of the volume of the discharge space, a pair of electrodes opposite one another to create the main discharge and spaced a distance from one an... | 04/22/2003 |
| 6339280 | Flash lamp with mirror In a flash lamp, a mirror structure (20, 30, 40) is fixed at an inner end portion of an exhaust pipe (21, 34, 44) secured to a center of a stem (6) disposed at a bottom portion of an envelope (H). An arc emission part (S) is located at a focal position of... | 01/15/2002 |
| 6229272 | High speed photography light source A flash illumination system is provided which is especially useful for high-speed photography. In one embodiment, the invention provides a surface discharge lamp which produces an intense broadband burst of light having an intended spectrum. Another embod... | 05/08/2001 |
| 6177765 | Active diode protection apparatus in metal halide lamps A metal halide lamp, having a cold fill pressure of at least 50 torr, incorporates a starter circuit with an active device to protect the diode included therein. The active portion of the starter circuit, either removes a voltage multiplying circuit porti... | 01/23/2001 |
| 5994850 | Switching arrangements wherein a cylindrical trigger electrode is arranged around a gap between an anode and cathode for establishing a discharge therebetween A switch for switching large currents and large charges includes an anode separated from a cathode with a cylindrical trigger electrode located around the anode and the gap. The cathode is of a metal such as zinc, cadmium, tin or magnesium. During operati... | 11/30/1999 |
| 5955846 | Discharge lamp lighting device and a method for lighting a discharge lamp A discharge lamp lighting device according to the present invention includes: a discharge lamp including an electrode; and a lighting circuit for lighting the discharge lamp, the lighting circuit being connected to the discharge lamp, wherein the discharg... | 09/21/1999 |
| 5945790 | Surface discharge lamp A high intensity discharge lamp includes a dielectric substrate, a first electrode near the dielectric substrate, a second electrode spaced from the first electrode and near the dielectric substrate, a conductor spaced from the dielectric substrate, and a... | 08/31/1999 |
| 5420481 | Fluorescent lamp with wide range of luminous intensities An apparatus is provided for controlling the luminous output of a fluorescent lamp over a wide dimming range. The luminous output is controlled by controlling the lamp current, while the lamp is immersed in a lateral electrostatic field. The lamp and exte... | 05/30/1995 |
| 5418423 | Capacitively coupled trigger for pseudogap cold cathode thyratrons An improved gas discharge trigger for a pseudogap cold cathode thyratron. Electrical trigger pulses are capacitively coupled through the vacuum envelope wall (16) causing a gas discharge adjacent to the rear of the hollow cathode (26). Coupling apertures ... | 05/23/1995 |
| 5272420 | Biasing system for reducing ion loss in lamps A high intensity discharge lamp system includes an AC supply for a chamber within which a plasma conductor is created to generate light. In order to confine charged particles within the chamber and to inhibit migration and loss thereof, a DC circuit taps ... | 12/21/1993 |
| 5235256 | Biasing system for controlling chemical concentration in lamps A high intensity discharge lamp system includes an AC supply for a chamber within which a plasma conductor is created to generate light. In order to control the concentrations of charged particles within the chamber and to influence migration thereof, a D... | 08/10/1993 |
| 5146141 | Hollow-electrode switch A gas-discharge switch with a cold-cathode low-pressure gas discharge between the cathode and the anode has a discharge gap in a central discharge region of a discharge chamber. The maximum inside height of the discharge chamber determines the length of t... | 09/08/1992 |
| 5128596 | Gaseous-discharge lamp having reflector in interior thereof A gaseous-discharge lamp has a valve defining an interior of the lamp in which an inert gas, such as xenon, is confined. A cup-shaped reflector is disposed in the interior of the lamp, whose inner surface cross-section is preferably a hyperbola or an elli... | 07/07/1992 |
| 5107183 | Discharging method and small fluorescent lamp using the discharging method A charging method within a glass tube using a direct current of low voltage is provided in order to obtain a small fluorescent lamp with a light emission of high luminance. Two distinct discharges are achieved through use of one negative electrode. The fi... | 04/21/1992 |
| 5075603 | Cold-cathode discharge lamp device A cold-cathode discharge lamp device including a cold-cathode discharge lamp unit and a supplemental light source for emitting light toward a discharge space between a pair of cold-electrodes of the discharge lamp unit for producing initial electrons in t... | 12/24/1991 |
| 5055748 | Trigger for pseudospark thyratron switch The present invention concerns a method for triggering certain high voltage electronic, gas discharge switches that are a novel type of high power thyratron. In this invention, triggering of switches of the so-called "pseudospark thyratron" type (a type o... | 10/08/1991 |
| 5043636 | High voltage switch The present invention encompasses a high voltage switch utilizing first and second terminal electrodes and an intermediate electrode disposed therebetween. A high voltage pulse, applied to the intermediate electrode, initiates sequential overvoltaging of ... | 08/27/1991 |
| 5030894 | Rare gas discharge lamp device A rare gas discharge lamp device comprises a bulb with a rare gas sealed therein, a pair of internal electrodes provided within the bulb, a phosphor layer formed on the inner surface of the bulb, a lighting circuit adapted to apply voltage across two inte... | 07/09/1991 |
| 4970440 | Orientation independent ignitron with grooved cathode An orientation independent ignitron (OII) has an anode, a cathode with a plurality of spaced grooves facing the anode, and a cooling mechanism which causes liquid metal vapor to condense as a film which is retained on the grooved cathode surface by surfac... | 11/13/1990 |
| 4962335 | Deuterium lamp voltage supply means A deuterium lamp starting circuit utilizing the arc-defining aperture cage of the lamp as the arc-starting electrode to enable the application of a positive, low starting voltage simultaneously with the application of the filament voltage. This positive, ... | 10/09/1990 |
| 4899090 | Rare gas discharge lamp device A rare gas discharge lamp device comprises a bulb with a rare gas sealed therein, a pair of internal electrodes provided within the bulb, a phosphor layer formed on the inner surface of the bulb, a lighting circuit adapted to apply voltage across two inte... | 02/06/1990 |
| 4745343 | Panoramic optical system with very sharp beam control A panoramic light emitter of an omnidirectional horizontal light beam with very sharp cut-off in the vertical plane is disclosed. The sharp cut-off prevents interference near airports. High average powers are attainable because the light source can be dis... | 05/17/1988 |
| 4692664 | Gaseous discharge device In order to facilitate the initiation of plasma discharge inside a gaseous discharge tube, some form of pre-ionizing the gas is required. This invention describes a technique whereby a small but intense discharge region is created near the cathode of a d.... | 09/08/1987 |
| 4668896 | Linear geometry thyratron The low pressure gas-filled thyratron is scalable in the long dimension. Internally the tube is formed as a tetrode, with an auxiliary grid placed between the cathode and the control grid. A DC or pulsed power source drives the auxiliary grid both to insu... | 05/26/1987 |
| 4661747 | Efficient electrical conversion switching tube suitable for inductive loads Disclosed is an electrical driving and recovery system for a high frequency environment. The recovery system can be applied to drive present day direct-current or alternating-current loads for better efficiency. It has a low-voltage source coupled to a vi... | 04/28/1987 |
| 4620135 | Electric circuit interrupting devices A thyratron utilizable as a circuit interrupting protective device is provided. The thyratron includes an apertured grid between anode and cathode which is divided transversely into two parts separated by an insulating layer. Both surfaces of the composit... | 10/28/1986 |
| 4568856 | High pressure metal vapor discharge lamp A high pressure metal vapor discharge lamp including an arc tube having at least a main electrode at each end thereof, a fill sealed in the arc tube, including mercury, metal halide and starting gases selected from the group consisting of Ar, Kr and Xe, a... | 02/04/1986 |
| 4529914 | High intensity discharge lamp ignition system A high intensity discharge (HID) lamp has an arc tube including a pair of main electrodes and at least one auxiliary electrode or probe, wherein a high frequency (HF) high voltage is applied to the probe for forming a high frequency (HF) ignition discharg... | 07/16/1985 |
| 4433271 | High pressure discharge lamp A high pressure discharge lamp including discharge tube having at least two electrodes at opposite ends thereof, an outer bulb housing the discharge tube, a circuit for starting the discharge tube and a glow starter which is covered with a heat shield mem... | 02/21/1984 |
