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8106598 |
Method and apparatus for assuring compliance with high efficiency lighting standards
Method and apparatus for assuring use of a fluorescent or similar high efficiency lamp in a screw base socket, the invention provides a circuit containing a screw base socket and an associated...
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8072148 |
Fluorescent lamp driving device and liquid crystal display apparatus using the same
A fluorescent-lamp-driving device contains a driving control circuit that receives direct current power voltage and a lamp control signal for performing drive control on fluorescent lamps and...
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8026674 |
Electron source and method for the operation thereof
An electron source has an electron emitter with an electron emission cathode, a high voltage unit provided for power supply of the electron emission cathode, and a low voltage unit provided to...
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8004199 |
Method for powering a control circuit for a gas discharge lamp during pre-heating of said lamp, and a device for performing said method
The method according to the present invention relates to controlling a gas discharge lamp during a pre-heating period of said lamp, wherein a first terminal of a control circuit is connected with a...
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7808183 |
Arrangement for the regulation of the electron beam power of an electron gun
An arrangement for the regulation of the electron beam power of an electron gun, which comprises a filament cathode, a block cathode and an anode. Between the filament cathode and the block cathode...
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7800311 |
Power supply unit, high-frequency circuit system and heater voltage control method
At the time of restoration of the power supply after a power failure, a voltage higher than that in the normal operation mode is supplied to a heater. After a lapse of a predetermined time, the...
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7728494 |
Light emission device and display device
A light emission device and a display device having the light emission device are provided. The light emission device includes first and second substrates that are arranged to face each other, an...
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7675250 |
Thermal protection for lamp ballasts
The output current of a ballast is dynamically limited when an over-temperature condition is detected in the ballast according to one of (i) a step function or (ii) a combination of step and...
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7629750 |
Lamp driving device and driving method thereof
A lamp driving device includes a switch circuit for supplying a signal; a transformer which boosts a voltage of the signal from the switch circuit and supplies the boosted voltage to at least one...
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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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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 (200) and...
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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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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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7247991 |
Dimming ballast and method
A ballast lamp circuit and method of operation is disclosed. The ballast lamp circuit comprising an inverter circuit and cathode heating circuit, wherein a lamp current, generated by the inverter...
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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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7193368 |
Parallel lamps with instant program start electronic ballast
In a current fed electronic ballast multiple lamps are operated in a parallel circuit arrangement. The ballast provides pre-heating to the cathodes of the lamps for a period of time before an open...
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7075253 |
Method for operation of a lighting system
In an operating method for a lighting system and a lighting system in which a readiness command is provided, in response to such readiness command a ballast drives a discharge lamp in such a way...
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6952082 |
Microwave excited ultraviolet lamp system with single electrical interconnection
A microwave excited ultraviolet lamp system having a single electrical cable that supplies operating voltages from a power supply to a lamp head. The single electrical cable may provide high...
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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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6906468 |
Ballast device for uv radiator and also method and device for disinfecting water
The invention relates to a novel ballast device for pre-heating, starting and operating at least one UV emitter, constructed in the form of a gas discharge lamp with two heating coils lying...
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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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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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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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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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6528955 |
Ballast system for a fluorescent lamp
A flasher ballast system includes a high frequency instant start ballast and one or more transformers. The high frequency instant start ballast may provide the strike voltage and perform the...
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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 dis...
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6501225 |
Ballast with efficient filament preheating and lamp fault protection
A ballast (10) for powering a gas discharge lamp (20) having heatable filaments (22,24) includes a filament heating and protection circuit (300) that provides preheating of the filaments,...
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6433490 |
Electronic ballast for at least one low-pressure discharge lamp
An electronic ballast for at least one low-pressure discharge lamp contains an inverter which is connected to a direct-voltage source (UBUS), a load circuit which is connected to the inverter and...
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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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6316878 |
Electric-light bulb
The electric-light bulb is capable of limiting an inrush current and automatically periodically changing brightness. In the electric-light bulb, a filament is provided in a bulb body. A resistance...
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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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6265830 |
Apparatus and method for supplying a regulated current to a magnetron filament
A power supply for supplying operating voltages to a magnetron of a lamp heating or curing system. The power supply is mounted remotely from the magnetron and includes a filament transformer for...
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6259210 |
Power control apparatus for an ION source having an indirectly heated cathode
In a power control apparatus for controlling power supply of an ion source having an indirectly headed cathode, the cathode bias power supply which provides a bias potential between the filament...
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6211619 |
Electronic ballast cathode heating circuit
In a high-frequency electronic ballast, a screw-in fluorescent lamp is connected with and powered by way of a series-resonant LC circuit. A resistive load is connected with the LC circuit, thereby...
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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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6169369 |
Low cost, precision electronic starter
Provided is a lighting circuit (10, 100, 160) which includes a line voltage source 12 used to supply a full wave signal 72 to circuit 10. A ballast 14 is connected to the line voltage source 12,...
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6147455 |
Gas discharge lamp ballast circuit with electronic starter
A ballast circuit with an electronic starter for a gas discharge lamp having a pair of cathodes is disclosed. The circuit comprises a main current path with a first leg connected to one cathode of...
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6140772 |
Method and apparatus for control of fluorescent lamps
A fluorescent lamp controller for fluorescent lamps, the controller being responsive to the instantaneous power applied to the filaments and further generating a computed temperature signal to...
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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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6087781 |
System for controlling fluorescent lamp operation and illumination
Control circuitry causes a fluorescent lamp to flash by cycling the primary of the lamp ballast reactor at a desired cycle rate. This results in the average lamp wattage output being generally...
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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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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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5998930 |
Electronic ballast with two-step boost converter and method
An electronic ballast (10) for fluorescent lamps includes a rectifier circuit (100), a boost converter (200), and an inverter (500). The boost converter (200) includes a boost control circuit (400)...
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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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5994843 |
Light source lighting device
A light source power supply circuit includes a DC power source and an energy accumulating capacitor connected in parallel through a charging switching element to the DC power source. A polarity...
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