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| Number | Title | Issue Date |
| 8232727 | Ballast circuit for a gas-discharge lamp having a filament drive circuit with monostable control An electronic ballast circuit includes a filament drive circuit that can adjust the pulse width of a pulsed heating signal in accordance with the lamp current to a gas-discharge lamp. A logic device, such as an SR flip-flop, is used to control a switch that is coupl... | 07/31/2012 |
| 8138676 | Methods and systems for dimmable fluorescent lighting using multiple frequencies A system for operating a fluorescent light is provided. The system comprises: a fluorescent lamp with at least one electrode having at least one corresponding heating filament; a filament signal power supply for providing a filament current signal having a filament ... | 03/20/2012 |
| 7855512 | Device for lighting a high-pressure discharge lamp by supplying alternating current The high-pressure discharge lamp lighting device of the invention includes a lighting circuit for supplying an alternating current to a high-pressure discharge lamp to cause lighting, the high-pressure discharge lamp having an arc tube in which a halogen material is... | 12/21/2010 |
| 7692388 | Methods and apparatus for reducing radio frequency emissions in fluorescent light lamps Methods and apparatus are provided for increasing the life of a fluorescent lamp suitable for use as a backlight in an avionics or other liquid crystal display (LCD). The apparatus includes a channel configured confine a vaporous material that produces an ultra-viol... | 04/06/2010 |
| 7622868 | Inductively powered gas discharge lamp An inductively powered gas discharge lamp including both a power coil and a heating coils associated with each filament. The heating coils enable the filaments to be preheated before the starting voltage is applied through the power coils. The inductive power coils ... | 11/24/2009 |
| 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 |
| 7282864 | Discharge lamp and control of the same A discharge tube is driven by a multiple-phase drive circuit, and includes a discharge container having an internal discharge space and multiple electrodes that are secured to the discharge container and correspond to each phase of the multiple-phase drive circuit. ... | 10/16/2007 |
| 7230389 | Metal halide lamp having function for suppressing abnormal discharge A metal halide lamp includes a ceramic arc tube that is composed of a main body and two narrow tube parts provided at respective ends of the main body; a pair of electrodes provided inside the main body; two feeders, each being connected at one end thereof to a diff... | 06/12/2007 |
| 7231060 | Systems and methods of generating control signals Separating a source in a stereo signal having a left channel and a right channel includes transforming the signal into a short-time transform domain; computing a short-time similarity measure between the left channel and the right channel; classifying portions of th... | 06/12/2007 |
| 7135811 | Shroud holder for quartz and ceramic arc tubes A multi-functional shroud/arc tube support or clip (40a) for a high intensity discharge lamp (10). The support (40a) has one end (42) formed to engage a shroud (20). The one end (42) is formed as an arcuate mem... | 11/14/2006 |
| 7050317 | Content addressable memory (CAM) devices that support power saving longest prefix match operations and methods of operating same Content addressable memory (CAM) devices include at least one CAM array having a plurality of columns of ternary CAM cells therein. A bit/data line driver circuit, which receives search words and write words, is electrically coupled to the CAM array. The bit/data li... | 05/23/2006 |
| 7051290 | Graphical interface for receiving eyeglass prescription information A high volume lens curing system is described. The high volume lens curing system is configured to cure multiple eyeglass lenses in a continuous manner. The lens curing system includes a computer-implemented method configured to collect prescription information, sav... | 05/23/2006 |
| 7038398 | Kinetic illumination system and methods The present invention relates to methods of creating eye-catching displays by taking advantage of color-changing illumination provided by LED systems disclosed herein. Displays can be made to appear to change color or to move simply by changing the color of the ligh... | 05/02/2006 |
| 7038399 | Methods and apparatus for providing power to lighting devices Methods and apparatus for providing power to devices via an A.C. power source, and for facilitating the use of LED-based light sources on A.C. power circuits that provide signals other than standard line voltages. In one example, LED-based light sources may be coupl... | 05/02/2006 |
| 7038380 | Three phase light bulb A light bulb includes a seat having a first engaging point and a first contact point respectively formed on a bottom face of the seat to correspond to a second engaging point and a second contact point of a light bulb socket. A first end of the first wire engages wi... | 05/02/2006 |
| 6967856 | Content addressable memory (CAM) devices that utilize segmented match lines and word lines to support pipelined search and write operations and methods of operating same CAM devices include a segmented CAM array that is configured to support a long word search operation (e.g., x8N search) as a plurality of overlapping segment-to-segment search operations that are each performed across different rows within a group of rows in the CAM... | 11/22/2005 |
| 6965519 | Content addressable memory (CAM) devices that utilize dual-capture match line signal repeaters to achieve desired speed/power tradeoff and methods of operating same Segmented CAM arrays are provided with dual-capture match line signal repeaters that support high speed pipelined search operations. A dual-capture match line signal repeater may extend between xR and xS segments of CAM cells within a respective row. This repeater p... | 11/15/2005 |
| 6943498 | High intensity discharge lamp and high intensity discharge lamp system using the same 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 se... | 09/13/2005 |
| 6936967 | Fluorescent lamp and method of manufacturing same Fluorescent lamp (1) having a glass discharge vessel (2) in which a gas is present, which discharge vessel (2) is provided with a tubular end portion (3) having a longitudinal axis, which end portion (3) includes a glass stem (5... | 08/30/2005 |
| 6919684 | Halogen 3-way light bulb A 3-way halogen light bulb. ... | 07/19/2005 |
| 6858987 | Flash lamp unit and flash radiation device The object of the present invention is to provide a flash lamp unit with a long service life which allows a high radiant efficiency to be obtained and a flash radiation device demonstrating excellent flash radiant performance despite a small size, and the flash lamp... | 02/22/2005 |
| 6841936 | Fast recovery electron multiplier An improved electron multiplier bias network that limits the response of the multiplier when the multiplier is faced with very large input signals, but then permits the multiplier to recover quickly following the large input signal. In one aspect, this invention pro... | 01/11/2005 |
| 6552494 | Fluorescent lamp driver circuit Herein described is a driver circuit of a fluorescent lamp having a first and a second electrode and igniting when the voltage between the first and second Electrode exceeds a given threshold voltage. The driver circuit comprises an inductance coupled to ... | 04/22/2003 |
| 6469447 | Fluorescent lamp lighting apparatus A fluorescent lamp lighting apparatus includes a fluorescent light emitting tube; and an electronic lighting circuit for applying an electric current to the fluorescent light emitting tube. The electronic lighting circuit includes a pair of electrode fila... | 10/22/2002 |
| 6285119 | Light bulb having increased efficiency An electric lightbulb is provided for use with lightbulb sockets in either 110V or 220V screw type or bayonet circuits. The lightbulb includes a lamp portion and a cap portion, with the cap portion preferably containing circuitry. When the switch is on a ... | 09/04/2001 |
| 6211618 | Arc discharge lamp with bimetal strip for fast passive lamp failure Fluorescent tube type discharge lamp has end sealed in base with terminal pins connected to lead wires passing through stem press and supporting an electrode in the form of a coil having an emitter. Bimetal strip has a first end welded to one of the leads... | 04/03/2001 |
| 6114809 | Planar fluorescent lamp with starter and heater circuit A planar fluorescent lamp having a resistive trace and optically transmissive cover electrodes is described. In one embodiment, the lamp includes an insulative lamp body with the transparent cover electrodes supported by the lamp cover. The resistive trac... | 09/05/2000 |
| 5898275 | Fluorescent lamp system including light blocking members to create uniform illumination along a florescent lamp A fluorescent light source includes a fluorescent lamp, lamp bases attached to opposite ends of the fluorescent lamp, and an electrically insulating substrate connected to the fluorescent lamp. A heating element is positioned on the fluorescent lamp, and ... | 04/27/1999 |
| 5834908 | Instant-on vapor lamp and operation thereof Operation of a vapor lamp light source for instrumentation utilizes a lamp manager controller for instant-on and precise temperature control to enhance and control output at specified wavelengths by monitoring and discriminating the spectral output of the... | 11/10/1998 |
| 5616989 | Fluorescent lamp system including an integrated heater/power harness A fluorescent light source includes a fluorescent lamp, lamp bases attached to opposite ends of the fluorescent lamp, and an electrically insulating substrate connected to the fluorescent lamp. A heating element is positioned on the fluorescent lamp, and ... | 04/01/1997 |
| 5489819 | Method of operating a metallic vapor discharge lamp The method of conducting a lighting operation of a metallic vapour discharge lamp, to maintain a suitable arc tube temperature, even if the lamp is operated at an input power higher than 160 W/cm of lighting length. A metallic vapour discharge lamp, in wh... | 02/06/1996 |
| 5406172 | Light source intensity control device A light source device having a controlled current source that maintains a constant intensity of light from the source during changes in light source temperature, particularly at warm-up. The light source is heated to speed up warm-up and to maintain const... | 04/11/1995 |
| 5051657 | Safety filament assembly for double-enveloped arc discharge lamp An electric lamp assembly includes a sealed outer envelope, an arc discharge tube mounted within the outer envelope, a safety filament connected in series with the arc discharge tube for extinguishing the arc tube within a predetermined time after the out... | 09/24/1991 |
| 5051649 | Arc discharge lamp with liquid metal and heating means A ballastless high pressure discharge lamp includes an arc tube, electrodes disposed in the arc tube, a column of mercury disposed in the arc tube and having a volume less than the volume of the arc tube, and cushion material disposed in the arc tube adja... | 09/24/1991 |
| 5047689 | Gas discharge tube, indirectly heated cathode for use therein and drive circuit therefor A gas discharge tube comprises an indirectly heated cathode structure including a hot cathode into which a heater is incorporated. During discharging, the heater is supplied with a discharge current so as to generate Joule heat which is used as a heat sou... | 09/10/1991 |
| 4987342 | Self-ballasted glow discharge lamp having indirectly-heated cathode A negative glow discharge lamp including an anode and an indirectly-heated cathode disposed within a phosphor-coated envelope. The cathode includes a heater filament surrounded by a metallic cylinder which is coated with an emissive material. The differen... | 01/22/1991 |
| 4857808 | Modified impedance rapid start fluorescent lamp system A modified impedance rapid start fluorescent lamp system is provided with interrupted cathode heating. This structure includes a circuit in parallel with one of the bimetal switches at each side of a cathode. The circuit includes a current limiting capaci... | 08/15/1989 |
| 4709188 | Operation of standby filament associated with an AC arc discharge lamp ballast An AC polarity-reversing bridge ballast for an arc discharge lamp using an incandescent filament for resistive ballasting and standby illumination powers the filament during hot restart without modifying the low duty cycle operation of the starting oscill... | 11/24/1987 |
| 4695768 | Bimetal switch for electrode heat cutout within an electrically insulating support A fluorescent lamp electrode heat cutout switch is provided for placement within a fluorescent lamp stem and outside the discharge envelope and is configured such that a resistive heater wire is connected to one electrode lead-in and a bimetallic switch e... | 09/22/1987 |
| 4672270 | Metal vapor discharge lamp having a starting device of a thermal switch type A metal vapor discharge lamp has a burner for sealing xenon gas, mercury and a light-emitting additive in a translucent ceramic tube, a starting device of a thermal switch type which has a series circuit of a thermal switch and a coil filament and which i... | 06/09/1987 |
