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Document Title |
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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...
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8125154 |
Automatic lamp detection method and optimal operation for fluorescent lamps
There is provided a method that can detect the lamp type of fluorescent lamps and operate the lamp at the appropriate lamp power. The proposed method involves the classification of lamp...
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8120286 |
Control system for fluorescent light fixture
A ballast module regulates power output to a fluorescent light. The ballast module includes a component. A temperature sensor senses temperature of the component. A control module adjusts power...
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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...
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7843138 |
Power supply for a hot-filament cathode
In accordance with one embodiment of the present invention, there is provided a switch-mode power supply to generate the heating current for a hot-filament electron-emitting cathode. The power...
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7750570 |
Glow-switch starter, lighting device and lighting system therewith, and use thereof
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...
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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...
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7649319 |
Ultra-high pressure mercury lamp
An ultra-high pressure mercury lamp in which the tungsten comprising the electrodes is prevented from spraying during starting and operation, and blackening on the inside wall of the arc tube is...
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7638933 |
Electron emission device comprising carbon nanotubes yarn and method for generating emission current
An exemplary electron emission device includes an electron emitter, an anode opposite to and spaced apart from the electron emitter, a first power supply circuit, and a second power supply circuit....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4654560 |
Three (3)-way lamp having a tungsten halogen inner envelope
A three (3)-way lamp having a tungsten halogen-cycle inner envelope and an operating circuit for the inner envelope is disclosed. The operating circuit comprises a ballast element and two diodes...
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4626745 |
Ballast circuit for lamps with low voltage gas discharge tubes
A ballast circuit arrangement for providing a predetermined desired A.C. voltage to enhance the operation of the gas discharge tube serving as the main light source in a lighting unit of the type...
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4574219 |
Lighting unit
A lighting unit having a filament serving as a supplementary light source, an improved gas discharge tube serving as a main light source having improved electrodes and an improved ballast circuit...
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4536680 |
Resistive lamp ballast with re-ignition circuit
A discharge lamp is provided with a resistive ballast together with means for sensing lamp voltage conditions. If the lamp voltage exceeds a predetermined threshold then a control circuit operates...
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4494041 |
Incandescent ballast assembly
Apparatus for use with a fluorescent lamp having a longitudinal axis and a filament winding at each end includes a pair of terminals formed for connection to a potential source with means for...
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4481446 |
Metal vapor discharge lamp
In a metal vapor discharge lamp for operating it by high voltage generated in the actuation of a heat sensitive switch means in an outer bulb, a relatively low pressure of a sealed gas or mercury...
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4438369 |
Unitary light source comprising compact HID lamp and incandescent ballast filament
Unitary light source comprises compact HID lamp and starting and operating circuit therefor operable from household AC energizing potential. The HID lamp is ballasted by incandescent filament means...
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4398130 |
Arc lamp lighting unit with low and high light levels
The present invention relates to a lighting unit having low and high light levels and employing an efficient arc lamp as the source of light during the high level setting. The unit employs a...
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4382210 |
Ballast circuit for direct current arc lamp
A high efficiency controlled direct current source for operating high pressure mercury or metal halide lamps for use as substitutes for ordinary incandescent lamps. The circuit includes a voltage...
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4367433 |
Self ballasted lamp for automotive, aircraft runway, etc. lighting
A tungsten filament lamp incorporates arc discharge electrodes for an arc discharge in a gas fill enclosed in the lamp envelope. The tungsten filament is utilized as a ballast resistance for the...
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4367432 |
Blended lamp
In a blended lamp, an incandescent filament and a high-pressure discharge tube are arranged electrically in series. The filament forms part of a halogen incandescent lamp and the discharge tube...
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4358708 |
Light emitting diode assembly
A lamp assembly includes a lamp and a lamp package. The lamp includes a light-emitting portion with a flange at its base and electrically conducting leads extending from the base. The flange has a...
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4350929 |
Fluorescent lighting device
A fluorescent lighting device which includes a preheating type fluorescent discharge tube and as the ballast thereof an incandescent bulb. The fluorescent lighting device is ignited by the use of a...
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4349764 |
Low-pressure metal vapor discharge lamp
The invention relates to a low-pressure metal vapor discharge lamp comprising a discharge tube and an outer bulb enveloping the discharge tube. Provided between the discharge tube and the outer...
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4344018 |
High pressure metal vapor discharge lamp
A high pressure metal vapor discharge lamp according to the present invention comprises the following first and second starting aid circuits mounted within an outer envelope. The first starting aid...
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4340843 |
Keep-alive circuit for gas discharge lamp
A circuit for starting and ballasting a compact high intensity arc discharge lamp, and for preventing failure of the arc discharge. A filament connected in series with the arc lamp provides...
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4329622 |
Low pressure gas discharge lamp with increased end illumination
A low pressure gas discharge lamp is provided with a pair of high power incandescent electrodes to increase output illumination at the lamp ends. In an alternate construction, the electrodes are of...
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4316124 |
Mixed light arrangement
The invention relates to a mixed light lamp arrangement intended to be connected to an a.c. power supply. The lamp arrangement comprises a rectifier bridge having output terminals interconnected by...
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4282461 |
Television raster centering aid
A television raster centering aid comprises means for blanking a horizontal scan line located at the center of the vertical deflection field. In an illustrative embodiment, an operational amplifier...
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