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7595490 |
Charged particle beam emitting device and method for operating a charged particle beam emitting device
A method for operating a charged particle beam emitting device and, in particular, an electron beam emitting device including a cold field emitter is provided. The method includes the steps of...
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7586730 |
Electron bombardment heating apparatus and temperature controlling apparatus
An electron bombardment heating apparatus, in which thermions emitted from filaments are accelerated and impinge upon a heating plate, so as to heat the heating plate, wherein a peripheral wall of...
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7586098 |
Ion stripper device made of carbon nanotubes or fullerenes
A system and method for developing a solid state stripper device is described that more effectively strips off negative carbon ions to produce positively charged carbon ions. In one embodiment the...
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7576494 |
High voltage discharge lamp lighting method, lighting apparatus and image device using that lighting apparatus
The present invention applies to provide a lighting method of a high pressure discharge lamp dedicated particularly for image equipments in which re-lighting when turning ON the switch again...
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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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7544951 |
Electron gun assembly
A device which employs an electron beam, for performing a desired function, includes an electron gun for generating the electron beam. The electron gun includes a barrel shaped rotatable structure...
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7355348 |
Ballast for a discharge lamp having a continuous-operation control circuit
The invention relates to a novel ballast for a discharge lamp, in which a continuous-operation control circuit is brought out of operation when a physical operation, which defines a preheating...
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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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7268496 |
Discharge lamp lighting device and lighting system
When a discharge lamp is preheated, impedance of a filament electrode of the discharge lamp is computed. In accordance with the computed impedance, preheating and lighting of the discharge lamp are...
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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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7199526 |
Electronic ballast
An electronic ballast capable of extending life of the fluorescent lamp is disclosed. The electronic ballast according to the present invention comprises a DC/AC converter, a fluorescent lamp, a...
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7106008 |
Flashlight control circuit
A flashlight control circuit is provided to control the flash according to an exposure voltage and a predetermined voltage. Either a first comparator, second comparator and logic gate or a...
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6965237 |
Device for scanning or detecting electromagnetic waves
A detecting device for detecting electromagnetic waves generated by electric facilities includes a support having a peripheral surface for attaching a number of wave detectors which detect the...
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6936970 |
Method and apparatus for a unidirectional switching, current limited cutoff circuit for an electronic ballast
In accordance with one aspect of the present application, a lamp inverter circuit includes a switching portion that converts a bus voltage signal into an alternating current signal. An input...
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6838834 |
Lighting system and electric power supplier for the same
An electronic ballast of a lighting system includes an output power supplier and a heater power supplier. The output power supplier is configured to supply electric power to a lamp of the lighting...
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6812920 |
Display device
A display device which is suitable for connection to a computer etc. allows an operator to freely set a power saving mode to suppress the wasteful consumption of power. Power reduction means...
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6750619 |
Electronic ballast with filament detection
A fluorescent lamp electronic ballast for use with fluorescent lamps of the preheat or heated filament type is provided. The electronic ballast includes a multiple output DC to DC converter with a...
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6603275 |
Electronic starter for fluorescent lamps
An electronic starter for fluorescent lamp has a preheating circuit for controlling the preheating of the fluorescent tube and a power switch and locking circuit for cutting off the current to the...
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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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6504534 |
CRT display unit and power supply control method therefor
When a “screen saver” operates to display a homogeneous black picture image after the same image is continuously displayed on a CRT for a predetermined period of time, a power supply for a CRT...
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6495979 |
Power-saving apparatus and method for computer peripheral devices
A power-saving apparatus comprises: a heater; a control unit for detecting at least two power-saving commands, and for outputting a first power-saving control signal and a second power-saving...
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6456009 |
Adaptive heater voltage algorithm and control system for setting and maintenance of the heater voltage of a vacuum electron device
An adaptive heater voltage algorithm and control system for setting and maintaining a vacuum electron device (VED) heater voltage, such as that of a klystron. An algorithm and control system are...
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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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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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6320319 |
Charged particle generating apparatus
A charged particle generating apparatus including a first electrode, a second electrode, a current source supplying a current to the first electrode for heating the first electrode and a voltage...
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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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6114810 |
Electronic ballast circuit for fluorescent lamps which have a high Q factor and high resonance voltage
An electronic ballast circuit for fluorescent lamps, said circuit comprises an anti-interfering circuit, a rectifying circuit, a filtering circuit, a frequency-converting circuit and a resonant...
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6091187 |
High emittance electron source having high illumination uniformity
Direct and indirect electron bombardment provide a sufficiently high degree of temperature uniformity across the emitting surface of a large-area electron source for an electron beam projection...
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6084355 |
Circuit for controlling power supplied to a cathode heater of a cathode ray tube
A cathode heater of a cathode ray tube is rapidly energized either when turning on electric power or when returning to a power-on state mode of the Display Power Management System (DPMS) in an...
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6008587 |
Fluorescent lamp electronic ballast control circuit
An electronic ballast control apparatus and method for fluorescent lamps includes applying a heating current through the filaments of the lamp, and delaying the application of arc current through...
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5998812 |
Amplifying-gate thyristor with an increased hold current
An amplifying-gate thyristor having an increased integrated circuit includes a main thyristor and an amplifying thyristor. The amplifying thyristor is of the gate turnoff-type. The main thyristor...
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5952832 |
Diagnostic circuit and method for predicting fluorescent lamp failure by monitoring filament currents
A diagnostic circuit monitors filament currents in hot cathode fluorescent lamps for detecting when the filament erodes to the point of breaking. When such a filament failure is detected,...
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5923126 |
Fluorescent lamp electronic ballast with rapid voltage turn-on after preheating
An electronic ballast for a fluorescent lamp includes a delay triggered circuit which, upon expiration of a predetermined period during which the lamp filaments, constituting opposite electrodes of...
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5854538 |
Circuit arrangement for electrode pre-heating of a fluorescent lamp
A circuit arrangement used with electronic ballast equipment has an inverter which supplies a high-frequency half-bridge voltage to at least one load circuit having a lamp throttle, a fluorescent...
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5841240 |
Efficient discharge lamp electrode heating circuit operable over wide temperature and power range
A circuit arrangement for operating a discharge lamp comprising input terminals for connection to a supply voltage source. A load branch B has terminals for holding the discharge lamp and includes...
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5821696 |
Method and circuit to start and operate high pressure discharge lamps
Start and operation of high pressure discharge lamps, in which a high-frequency starting voltage U HF and an operating voltage U B are furnished to the lamp electrodes includes the steps of: 1)...
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5808425 |
Method for controlling the emission current of an electron source and an electron source having a control circuit for controlling the emission current
The invention is directed to a method for controlling the emission current of an electron source and to a correspondingly controlled electron source. For this purpose, a parallel circuit comprising...
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5798614 |
Fluorescent lamp filament drive technique
A method and apparatus for driving a fluorescent lamp is described wherein the fluorescent lamp is operated in the phanotronic, or hot-cathode, mode. The filament preheat current is decoupled from...
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5739640 |
Low line voltage detection control module and method for a fluorescent lamp
The present invention discloses a control module that provides improved control over the ignition of a fluorescent lamp. In one aspect, the control module determines whether the lamp is lit and,...
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5734231 |
Instant lighting type fluorescent lamp lighting circuit
A fluorescent lamp lighting circuit is disclosed in which an instant lighting is possible, and a high reliability is ensured. Further, the circuit is compact, and the cost is low. The fluorescent...
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5726534 |
Preheat current control circuit based upon the number of lamps detected
A feedback control system of ballast which has function to detect the number of lamp and is applied to an integrated circuit to control the ballast for a fluorescent lamp etc, and provides the...
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5677598 |
Low-pressure mercury discharge lamp with color temperature adjustment
A low-pressure mercury discharge lamp with a lamp vessel having a first lamp vessel portion (La1) with a first electrode (E11) and a first luminescent layer which radiates white light of a first...
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5656891 |
Gas discharge lamp ballast with heating control circuit and method of operating same
There is provided a ballast for at least one gas discharge lamp having an inverter which has two switches (S1, S2) in series, connected to a d.c. voltage source and switched with complementary...
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5646487 |
Lighting device for gas discharge tube with insulated discharge shielding member
The present invention is to provide a gas discharge tube which is properly lighted to improve the reproducibility of a satisfactory light emission state. The gas discharge tube includes an envelop...
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5623184 |
Lamp circuit with filament current fault monitoring means
A ballast arrangement is disclosed for use in powering fluorescent and other gas discharge lamps. The ballast arrangement controls the arc voltage provide by an arc voltage oscillator independent...
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5606226 |
Filament power supply for static vacuum fluorescent display
A DC power supply 44 for providing a desired filament voltage to a static filament in a vacuum fluorescent display 16 includes a voltage regulator 46 with an input and an output. The input couples...
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5592054 |
Fluorescent lamp ballast with selectable power levels
Disclosed is a power-level selection circuit in combination with a lamp circuit including a fluorescent lamp having first and second cathodes with resistive-heating filaments each spaced at a...
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5589740 |
Semiconductor-controlled operating circuit for one or more low-pressure discharge lamps, typically fluorescent lamps
To operate one or more serially connected low-pressure discharge lamps, tcally fluorescent lamps, a preheating circuit is provided to preheat the electrodes of the lamps (E1, E2, E3, E4), which...
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5583399 |
Ballast for one or more fluorescent lamps including threshold sensitive filament voltage preheating circuitry
To control preheating current flow through a fluorescent lamp supplied from high-frequency inverter (T1, T2, A) and a series resonance circuit, an electronic switching control circuit (SC) is...
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5583396 |
Optical device with metal halide discharge lamp having enhanced starting property
A metal halide lamp is employed, as a light source, in an optical device such as, for example, an illuminator or an image display. The optical device includes a discharge tube filled with mercury,...
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