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WO/2008/065842A1 |
There are provided a discharge lamp lighting device, capable of reducing rush current and power consumption and having a high response speed, and a projector equipped with the discharge lamp lighting device. A resistor (16) is connected ...
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WO2007087296B1 |
A color balanced solid-state backlight (15) provides feedback control of each color using a single photo detector (42) by imposing a modulation pattern (94, 96, 98) on the solid-state lamps revealing individual colors to the photodetecto...
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WO/2008/064715A1 |
The present invention relates to a circuit arrangement and corresponding method for igniting a high-pressure discharge lamp (LA), comprising a main combustion chamber (HaBK) with a first and a second main electrode (HaE1, HaE2) and an au...
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WO/2008/064711A1 |
The invention relates to a dimmer of dielectrically impeded discharge lamps (1) in which electrode groups can be sequentially operated.
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WO/2008/061936A2 |
The invention relates to an electric lamp comprising a light bulb (2) on which a sensory mechanism (7) is disposed that is designed to detect operating parameters of the lamp (1).
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WO/2008/061559A1 |
The invention relates to a circuit arrangement for operating a discharge lamp (LA) with preheatable electrodes with an input terminal for applying an input voltage, an output terminal for providing an output voltage (UA) to a lamp genera...
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WO/2008/061562A1 |
An electronic ballast (10) is equipped with a temperature sensor (20), which constantly measures the temperature of the electronic ballast. On the basis of information on the temperature dependence of the rated life, a duration in which ...
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WO/2008/063003A1 |
A pulse width modulation (PWM) control circuit is disclosed. The PWM control circuit indues an adder summing up an input signal and a conversion signal to generate a summation signal, a quantizer quantizing the summation signal generated...
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WO/2008/058994A1 |
The invention relates to a method for operating a low-pressure discharge lamp with a high colour temperature constancy, which low-pressure discharge lamp has a mercury source from which mercury is removed by evaporation during operation ...
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WO/2008/059639A1 |
An electrode part (1), is installed in a light source in which an electron-emissive material (7) is heated to emit thermions for causing arc discharge for light emission. The electrode part is equipped with a filament (5) for heating the...
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WO/2008/059677A1 |
In order to arbitrarily adjust the output power of an inverter to make the output voltage waveform of the inverter substantially sinusoidal and to keep the output voltage of a converter preceding the inverter substantially constant indep...
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WO/2008/058978A1 |
The invention relates to an illumination system with a discharge lamp for generating primary radiation, a color filter system for generating radiation filtered out of the primary radiation with a first color component, and an electronic ...
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WO/2008/059308A1 |
Electronic circuit means is provided for increasing the ability of fluorescent lamps to be dimmed using standard dimmers, such as phase-cut dimmers. The electronic circuit means includes at least one resistor connected between input term...
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WO/2008/059764A1 |
A discharge lamp lighting apparatus comprises a bridge type rectifying/converting circuit (CR1); feedback circuits (FB1,FB2); a chopper circuit (CR2); a charging circuit (CR3); a resonant circuit (CR4) that resonates with a high frequenc...
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WO/2008/058916A1 |
The invention specifies a lamp with an operating monitor (10) and an operating monitor (10) for a lamp, wherein the operating monitor (10) contains a control unit (3), at least one sensor (4, 8) for detecting operating data, and at least...
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WO/2008/059769A1 |
Conventionally, electric discharge lamp operating devices capable of dimming the discharge lamp of hot-cathode type have been provided. However, as the tube current is decreased, the temperature of the filament lowers. As the tube curren...
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WO/2008/055547A1 |
The present invention relates to a circuit arrangement for firing a discharge lamp, having a first and a second input connection for connecting an input voltage; an inverter, having an input and an output, wherein the input is coupled to...
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WO/2008/056630A1 |
A display device uses a cold cathode fluorescent lamp as a light source. The display device includes: an inclination detection unit which detects that one end of the cold cathode fluorescent lamp is arranged at a higher position than the...
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WO/2008/056435A1 |
Provided is a piezoelectric transformer drive circuit capable of reducing a switching loss of a full bridge circuit which drives a piezoelectric transformer. The drive circuit includes: a full-bridge circuit (1) formed by FFT (field effe...
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WO/2008/056270A1 |
A system receives an input with a light sensor of a device, determines a luminance of a subject based on the received input, and adjusts an output of an assist light of the device based on the determined luminance.
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WO/2008/055544A1 |
The invention relates to a circuit arrangement for operating a high-pressure discharge lamp (14), comprising an electronic ballast that is designed to feed an AC supply signal to the high-pressure discharge lamp (14), the AC supply signa...
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WO/2008/055366A1 |
A method for operating a UV lamp (8) comprising the following steps: - a converter (1) produces a bipolar feed voltage, current-limiting means (13) being provided, - the converter (1) is fed from the supply system and it produces an adju...
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WO/2008/056471A1 |
A cold cathode tube lamp which can be lighted easily when the ambient temperature is low. The cold cathode tube lamp comprises discharge tubes (1, 40) having a pair of electrodes (12, 13, 42, 43) and being driven when a voltage having an...
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WO/2008/052893A1 |
The invention discloses a circuit arrangement for operating at least one low-pressure discharge lamp, in particular a fluorescent lamp or compact fluorescent lamp, with at least two electrode filaments, which are each connected to power ...
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WO/2008/053428A1 |
A driver (1) for driving a gas discharge lamp (2) comprises: a controllable current source (3); a controller (4) for controlling the current source (3); measuring means (5) for measuring the distance between the lamp electrodes (21, 22)....
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WO/2008/053514A1 |
A discharge lamp lighting apparatus is provided with an inverter (4) for converting a direct current voltage into a high frequency voltage; a low voltage insulating transformer (T1) having a primary winding (P1) connected to an output te...
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WO/2008/053613A1 |
A sheet-type transformer comprises a primary winding (1) formed in a flat plate shape and a secondary winding (6) wound around the axis vertical to the surface of the primary winding (1). The end (6a) of the secondary winding (6) on the ...
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WO/2008/050867A1 |
This invention provides a high-pressure discharge lamp characterized by comprising a light transparent hermetically sealed vessel having a discharge space in its inside, electrode means for inducing discharge within a discharge space in ...
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WO/2008/048978A2 |
Systems and methods for an electrodeless plasma lamp as described. A drive probe is coupled to the lamp body to provide the primary power for ignition and steady state operation of the lamp. Feedback is used to adjust frequency in respon...
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WO/2008/047496A1 |
Disclosed is an illuminating device (1) comprising a hot cathode fluorescent lamp (2) having a filament electrode (7) emitting thermoelectrons, an optical sensor (3) for sensing electromagnetic waves emitted from the filament electrode (...
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WO/2008/046797A1 |
The invention relates to an ignition apparatus for a high-pressure discharge lamp (LA), which is equipped with an auxiliary ignition electrode (E3) and with two gas discharge electrodes (E1, E2), which are arranged in a discharge vessel ...
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WO/2008/047273A2 |
A driver (10) for driving a gas discharge lamp (11), preferably implemented as half-bridge converter, has two states, corresponding to rising lamp current (dI/dt>0) and falling lamp current (dI/dt<0), respectively. A controller (12) alwa...
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WO/2008/043234A1 |
A integrated electronic energy-saving lamp in which a rectifier is combined with a lamp tube. The integrated electronic energy-saving lamp comprises a lamp tube (1), a lampstand (2) and a plug (3). There is provided with a rectifier (4) ...
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WO/2008/044192A2 |
A lamp driving circuit (110) for driving a gas discharge lamp (11) is described, comprising current generating means (M1, M2, D1, D2, L, C, C1, C2) for generating a lamp current in discontinuous mode or critical discontinuous mode, and a...
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WO/2008/044413A1 |
A discharge tube lighting apparatus operates as follows: (1) an oscillator generates a triangle wave signal having the same charging and discharging slopes of a capacitor (C2) and turns on and off FETs (Qp1, Qn1); (2) a signal generation...
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WO/2008/044412A1 |
A discharge tube lighting apparatus synchronous operation system capable of operating a plurality of discharge tube lighting apparatuses at the same frequency and phase comprises: (1) a resonant circuit having primary and secondary windi...
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WO/2008/040454A2 |
The present invention relates to the operation of luminous means (3), such as fluorescent lamps and gas discharge lamps, for example. In order to operate an operating device (2) for luminous means (3), a method is implemented, whereby th...
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WO/2008/042069A2 |
A circuit (200) for powering a high intensity discharge lamp (10) comprises first and second input terminals (202,204), first and second output terminal (206,208), first and second inverter switches (SW.sub.l.SW.sub 2), a transformer (24...
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WO/2008/040251A1 |
This invention discloses a multi-lamps electric current control method which includes: When any of the said multi-lamps is open or the resonance circuit parameter is changed, the output voltage of the transformer is adjusted to ensure th...
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WO/2008/041709A1 |
It is possible to provide an image display device capable of accurately evaluating possibility of generation of trouble caused by the state of impure gas in a discharge vessel constituting a high-voltage discharge lamp. The image display...
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WO/2008/037639A1 |
Disclosed is a starter for at least one low-pressure discharge lamp, comprising a glow igniter that is used for starting the lamp and is disposed in an electrode heating circuit. According to the invention, a one-time fuse is provided wh...
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WO/2008/037290A1 |
The present invention relates to a circuit arrangement for starting a discharge lamp (20) with a driving apparatus, at whose output a drive signal with a predeterminable frequency can be provided; an inverter (14), which is coupled to th...
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WO/2008/037292A1 |
The invention relates to the improvement of the EMC of an electronic ballast or a luminaire with an integrated electronic ballast by means of introducing a radiofrequency-absorbing damping element (F), in particular a ferrite bead.
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WO/2008/037118A1 |
The invention discloses an energy-conserving device for illumination system. The energy-conserving device is connected between a power supply of and a lighting assembly of the illumination system. The energy-conserving assembly includes ...
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WO/2008/039298A2 |
An electronic ballast (20) for powering at least one gas discharge lamp (30) comprises a self-oscillating half-bridge inverter (200') having an inverter startup circuit (286,288,290) that does not require a voltage breakdown device, such...
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WO/2008/039290A2 |
A lamp includes a lamp voltage conversion circuit within a base and connected to a lamp terminal. The lamp voltage conversion circuit includes a phase-clipping circuit connected to the lamp terminal and establishing a phase conduction an...
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WO/2008/038527A1 |
A fluorescent lamp (10) is provided with a light emitting tube (102), which has a phosphor film on the inner surface, is filled with a discharge gas and composed of a translucent material; a first internal electrode (101a) sealed at one ...
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WO/2008/035483A1 |
A lamp connector capable of confirming the state of connection between an external electrode provided on the outer peripheral surface of an end of a tubular lamp and a terminal fitting on which the external terminal is mounted. An extern...
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WO2008014941B1 |
An apparatus for monitoring at least one fluorescent lamp, in particular in an explosion-hazard area, which fluorescent lamp has a lamp tube with electrodes arranged at its ends in the form of filaments, and has a ballast, is improved in...
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WO/2008/035268A2 |
Gas discharge lamp unit, comprising a transformer (T) for generating a secondary voltage in the order of magnitude of some hundreds of volts, and an LC circuit (Ls,Cs) for generating from the secondary voltage an output voltage in the or...
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