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7589472 |
Electronic ballast with lamp type determination
The electronic ballast with lamp type determination for an electronic ballast providing power to a lamp filament 208 includes a filament current sensing circuit 220 operably connected to the...
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7573046 |
Thermal field emission electron gun with reduced arcing
One embodiment relates to a thermal field emission electron gun. The electron gun includes a high-vacuum chamber, a thermal field emission cathode including a filament and a tip, a suppressor...
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7560868 |
Ballast with filament heating and ignition control
A ballast ( 10 ) for powering at least one gas discharge lamp ( 70 ) having heatable filaments ( 72,74 ) includes an inverter ( 200 ), a resonant output circuit ( 400 ) coupled between inverter (...
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7560867 |
Starter for a gas discharge light source
A starter for a gas discharge light source is configured to measure an initial resistance of one or more filaments of the gas discharge light source, such as a fluorescent light, each time the gas...
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7429826 |
Indirectly heated electrode for gas discharge tube, gas discharge tube using said indirectly heated electrode, and lighting device for said gas discharge tube
An indirectly heated cathode C 1 comprises a heater 1, a double coil 2, a mesh member 3, and a metal oxide 10. An electrical insulating layer 4 is formed on the surface of heater 1. ...
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7391041 |
Germicidal UV reactor and UV lamp
A germicidal UV reactor for use in fluid purifiers is provided, in which the UV reactor comprises an UV lamp with an UV transparent primary envelope and also an UV transparent secondary envelope...
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7339322 |
Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps
Apparatus and methods are disclosed for measuring cathode fall within a fluorescent lamp that contains an electrode and a gas. A level of cathode fall associated with the electrode may be...
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7279844 |
Electronic ballast
The invention relates to a ballast for low-pressure discharge lamps, comprising a controllable inverter circuit for the generation of a high-frequency supply voltage for a discharge lamp ( 1 ), a...
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7256549 |
Three electrode arc-discharge lamp
A method of operating an arc discharge lamp that has first and second electrodes is described. First, the first electrode is heated with a third electrode with a first arc until the first electrode...
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7187132 |
Ballast with filament heating control circuit
A ballast ( 10 ) for powering at least one gas discharge lamp ( 20 ) having lamp filaments ( 22,24 ) comprises an inverter ( 200 ), an output circuit ( 300 ), a filament heating control circuit (...
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7063431 |
Resistive bubble lamp structure
A resistive bubble lamp structure is disclosed and claimed, which comprises a vacuum glass tube containing liquid CH 2 Cl 2 with a low boiling point and a circuit mounted at the bottom end of the...
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7061173 |
Amalgam-doped low mercury low-pressure UV irradiator
A UV lamp unit is provided and comprises a lamp in the form of a mercury low pressure amalgam lamp that is provided with at least one amalgam deposit. A cladding tube surrounds the lamp in such a...
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6969952 |
System and method for automatically routing power for an integrated circuit
A system for automatically routing power in an integrated circuit, the system comprising memory for storing data defining a representation of an integrated circuit having a power contact and a...
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6894439 |
Portable power converter pack
A portable power converter comprising input means to receive low voltage DC input, voltage converter means for converting the low voltage DC input into high DC voltage output, the voltage converter...
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6788001 |
Lighting system with caring preheating of gas discharge lamps
In a lighting system which includes an electronic operating device and a gas discharge lamp with filaments, one filament terminal is respectively connected to an impedance network. The impedance...
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6736927 |
Apparatus for increased workpiece throughput
A system is disclosed for speeding workpiece thoughput in low pressure, high temperature semiconductor processing reactor. The system includes apparatus for loading a workpiece into a chamber at...
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6731073 |
Safety starter for fluorescent lamps
A fluorescent lamp starter circuit that incorporates the series arrangement of a glow-switch and a semiconductor switch. The semiconductor switch is coupled to a solid state timer. The solid state...
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6696791 |
Method for starting a discharge lamp
A method for starting a discharge lamp having two filaments includes the following steps: ( 1 ) preheating only one of the two filaments; ( 2 ) igniting the lamp; ( 3 ) operating the lamp with a...
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6653801 |
Mercury-free metal-halide lamp
A pair of electrodes ( 3 ) are provided in an arc tube ( 1 ) I/S is 20 (A/mm 2 ) or less on a condition that an area of a cross section at a tip of the electrodes ( 3 ) is S (mm 2 ) and an...
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6628093 |
Power inverter for driving alternating current loads
The invention discloses a power inverter using a microprocessor directly drawing the switching transistors and a circuit for computation of the actual power delivered to the load of a switching...
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6567080 |
Image display apparatus and control method thereof
In an image display apparatus, based upon such a relationship among previously measured power consumption in a power save mode, an application voltage and application time thereof, and also rising...
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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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6495961 |
TWT power supply with improved dynamic range
A power supply for a travelling-wave tube (TWT) includes a beam power supply ( 14 ) connected to the cathode and collector of the TWT, and a further power supply ( 20 ) connected to ground and to...
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6417630 |
Circuit arrangement
A ballast circuit for operating a lamp having preheatable electrodes. The frequency of a high frequency bridge inverter is controlled by a control circuit which has input connections to one of the...
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6407516 |
Free space electron switch
A free space electron switch is disclosed. The switch, which is useful in high speed telecommunications traffic, has an array of cathodes for emitting free space electrons. A grid of aiming anodes...
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6404421 |
Heater voltage generation
A heater circuit (H) according to the invention comprises a stabilizing power supply (SPS) with a control input (CT) which receives a control signal (Cs) to control the value at which the heater...
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6400088 |
Infrared carbon nanotube detector
A detector for detecting infrared photons is disclosed. It comprises an anode, a cathode including a plurality of nanotubes formed from carbon and means for electrically connecting the nanotubes,...
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6396219 |
Flasher string
A flasher string which includes a plurality of flashers connected in series and a plurality of thyrsitor diodes, each thyrsitor diode connected to a respective flasher in parallel. The flasher can...
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6376998 |
Feeding device for discharge lamp
To provide a power supply device for electric discharge lamps in which lamp extinguishing is completely prevented in high-pressure mercury vapor lamps with a comparatively large amount of mercury...
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6359387 |
Gas-discharge lamp type recognition based on built-in lamp electrical properties
A gas discharge lamp has an impedance element such as a capacitor connected to at least one electrode heater, to produce a heater impedance which falls within a range which is unique to lamps of...
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6348769 |
Electronic ballast
An electronic ballast for providing electrical energy to one or more fluorescent lamps having electrical discharge filaments. The ballast includes a pre-heating circuit having a first resonant...
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6339299 |
Preheating circuit for detecting the filament temperature of fluorescent lamps
A preheating circuit for a fluorescent lamp is provided. The preheating circuit includes a filament detecting circuit indirectly detecting a filament resistance in a fluorescent lamp by measuring a...
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6320318 |
Display device with temperature stabilization
The present invention relates to an image display system comprising a display panel (1) having at least one channel (35, 37, 39) comprising an ionizable gas mixture (55) including at least a basic...
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6300719 |
Drive scheme for low pressure gas discharge lamps
A drive scheme for low-pressure gas discharge lamps is provided with automatic detection of the type of the lamp and automatic adjustment of discharge current and heating current to the values...
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6252357 |
Self-ballasted fluorescent lamp and lighting fixture
The present invention provides self destruct arrangements for self ballasted fluorescent lamps and lighting fixtures using them. The ballast power supply includes at least one element that breaks...
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6211620 |
Ballast for fluorescent lamp
A ballast for a fluorescent lamp includes a high frequency power source circuit for supplying a preheat start type fluorescent lamp with preheating and lighting current via an inductor. The high...
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6204601 |
Device for controlling a magnetron filament current based on detected dynamic impedance
The present invention refers to a method for controlling a magnetron filament current. The control is provided by detecting the dynamic impedance or a noise level of the magnetron and by...
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6111369 |
Electronic ballast
A ballast for providing electrical energy to one or more fluorescent bulbs having electrical discharge filaments. The ballast includes a pre-heating circuit having a first resonant frequency,...
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6107746 |
Three-wire Christmas flashing control lamp
A three-wire Christmas flashing control lamp includes a filament, a bimetal plate, and three conductive poles installed in the lamp. Three conductive wires are extended from the bottom end of the...
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6081072 |
Filament lamp for wafer heating and heating light source
A heating light source for a heat treatment device of the light irradiation type with high temperature uniformity on the wafer surface during heating and a small operating current and a lamp which...
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6075320 |
Wide illumination range fluorescent lamp
A wide illumination range fluorescent lamp is described. The lamp utilizes three discrete sets of electrodes positioned to generate electric field to produce light energy within three distinct...
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6072285 |
Soft starter device for lamps
The invention provides a soft starter device for lamps. The soft starter device includes a rectifying circuit for converting an AC voltage into a DC voltage which serves as a triggering signal; a...
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6049174 |
High coulombic switch gas discharge device
A device suitable for switching large currents includes, within a gas filled envelope, an anode, electrodes and a thermionic cathode. Initially the device holds off a voltage until a triggering...
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6043606 |
Discharge lamp device having a preheating electrode circuit
The invention relates to a circuit arrangement for operating a discharge lamp with a high frequency current comprising a power feedback circuit and a electrode preheater. The circuit arrangement...
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6008586 |
Direct current ballastless modulation of gas discharge lamps
The present invention relates to an apparatus and method for receiving a modulating signal, splitting up its various frequency components into separate channels using a plurality of filters, and...
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5990626 |
Lighting unit, low-pressure mercury discharge lamp, supply unit, and combined packaging
A lighting unit according to the invention comprises a supply unit (1) and a low-pressure mercury discharge lamp (2). The low-pressure mercury discharge lamp has a light-transmitting discharge...
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5986408 |
Discharge lamp with heating electrode circuit
The invention relates to a circuit arrangement for operating a discharge lamp with a high frequency current comprising a power feedback circuit and an electrode preheater. The circuit arrangement...
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5939836 |
Discharge lamp lighting apparatus and lighting apparatus
A discharge lamp lighting apparatus of the present invention includes an inverter to convert input DC voltage into high frequency voltage and supply the converted high frequency voltage to a...
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5920153 |
Power supply for light sources, particularly for the quick ignition of fluorescent lamps and the like
A power supply for light sources, particularly for fluorescent lamps and the like, comprising capacitive means (1) that are connected to the mains (9) and are adapted to supply rectifier means (2)...
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5909085 |
Hybrid luminosity control system for a fluorescent lamp
A luminosity control system (10) for a fluorescent lamp (12) that has a glass enclosure (18) and a pair of lead wires (14) at each end of the glass enclosure is provided. A filament (16) is...
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