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WO/2006/059583A1 |
An inverter controller selectively drives inverter switching elements with a preheat frequency (f1), a start frequency (f2), and an ON frequency (f3) which are different from one another, so as to obtain a preheat mode, a start mode, and...
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WO/2006/056918A1 |
Current arrangement for operating a high intensity discharge lamp or a ultra high pressure discharge lamp, comprising a DC-to-DC converter, a control circuit for controlling the output value of the DC-to-DC converter, and a commutator. T...
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WO/2006/056925A1 |
A gas discharge lamp driver circuit, comprising an inverter (10) of a bridge type, which has first and second input terminals connected to DC power lines (6, 8) for receiving a DC power voltage and output terminals (18) for providing a s...
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WO/2006/056926A1 |
A projection system and a method for operating a discharge lamp are described. The protection system comprises a discharge lamp 12 and driving electronics 14. The color wheel 18 serves as color filter for filtering light 16 emitted from ...
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WO/2006/056143A1 |
A ballast circuit for controlling preheating, ignition or performing dimming of a gas discharge lamp such as a compact fluorescent lamp is disclosed. The ballast circuit has an inverter connected to a pair of input terminals for receivin...
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WO/2006/054855A1 |
Disclosed is a light source device where a lamp and a power supply module are integrated into a lamp housing. A planar light-emitting device using the light source device is also disclosed. The lamp housing includes a tube member and a l...
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WO/2006/054820A1 |
Disclosed herein is a method of driving a fluorescent light which divides the phases of input AC power depending on voltage magnitude and utilizes the low-voltage portions of the divided voltages as heating power for heating filaments, a...
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WO/2006/054601A1 |
The present invention aims at lighting a plurality of cold cathode tubes with uniform luminance by a common power supply using a cold cathode tube lighting device wherein a multilayer substrate with built-in capacitor is used. The presen...
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WO/2006/053529A1 |
The invention relates to a circuit arrangement for operating a high pressure discharge lamp comprising a voltage transformer, a load circuit which is supplied by said voltage transformer and provided with connections for the high pressur...
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WO/2006/051698A1 |
A cold-cathode tube lamp is provided with a glass tube (1); first and second internal electrodes (2, 3) provided inside the glass tube; first and second external electrodes (4, 5) which are provided outside the glass tube and connected t...
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WO/2006/051630A1 |
A backlight inverter in which surface luminance of an LCD is stabilized as compared with that at CCFL actuating by supplying a stabilized lamp current, with no influence by lamp temperature, and its driving method. In a backlight inverte...
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WO/2006/051676A1 |
A multiple discharge lamp lighting device for stabilizing and equalizing the tube currents of a plurality of discharge lamps without providing a ballast element on the secondary side of an inverter transformer. The discharge lamp lightin...
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WO/2006/051926A1 |
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 high-pressure discharge lamp having an arc tube i...
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WO/2006/051495A1 |
An anti-striation circuit employs an inverter topology including a pair of electronic switches (Q, M) that are switched between a conducting state and a nonconducting state in an alternating manner to apply an asymmetrical voltage wavefo...
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WO/2006/048880A1 |
The present invention presents a method of controlling the voltage supplied by a given AC power supply to a load by a means of a serial transformer comprising a pair of windings wrapped around a mutual core, such that the coil fed by the...
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WO/2006/048839A1 |
A lamp power circuit sensing system includes a unidirectional stage (22) having a unidirectional current, a bidirectional stage (24) operably connected to the unidirectional stage (22), and a power sensor (32, 34) operably connected to m...
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WO/2006/048835A1 |
An electronic ballast with remote capacitor placement includes a first housing (34); a second housing (36); an AC/DC converter (22); a DC bus (24) operably connected to the AC/DC converter (22); a lamp driver (26) operably connected to t...
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WO/2006/046405A1 |
A discharge lamp lighting apparatus wherein the tube current can be stabilized at a low cost without providing any ballast elements on the secondary side of an inverter transformer. A discharge lamp lighting apparatus (10) comprises inve...
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WO/2006/045399A1 |
An operating device for an illuminating means, particularly an electronic ballast for gas discharge lamps, comprises a regulating and/or control unit to which operating parameter signals can be supplied, which are converted by an analog-...
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WO/2006/046264A1 |
The present invention relates to a device for managing and controlling power supply of an electric apparatus, characterised in that it comprises a supply interface (4) and a logic unit (3) for managing said interface (4), said supply int...
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WO/2006/046199A1 |
A circuit arrangement and a method for operating a high intensity discharge lamp driver, which assure long-lasting stable operation of a high intensity discharge lamp regardless of the type or the age of the lamp. This is achieved by the...
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WO/2006/046419A1 |
A multiple-discharge-lamp lighting device in which the lamp current of each of a plurality of discharge lamps can be stabilized and made uniform at a low cost without providing a ballast element on the secondary side of an inverter trans...
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WO/2006/047014A1 |
An input line filter (28) separates an ac sinusoidal power source (22) from a power switching stage (26) having a series switching section (44) and a clamp switching section (46). Both the series switching section (44) and the clamp swit...
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WO/2006/046364A1 |
A level shift IC (3b) of a power supply interrupting part (3) interrupts power supply to a smoothing capacitor (4) when an interruption signal (Sa) is inputted for a time (T) from a timer circuit (8) while a discharge lamp (7) is lighted...
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WO/2006/042640A2 |
Disclosed is a device for operating illumination means, especially an electronic ballast (EVG) for gas discharge lamps, comprising a power factor correction circuit (PFC) for reducing harmonic oscillations when accepting input current, c...
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WO/2006/043222A1 |
The invention relates to a method and an arrangement (10) for monitoring a gas discharge lamp (22), comprising a control circuit (18) for detecting an electrical measured value assigned to the lamp voltage. The control circuit (18) is pr...
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WO/2006/044554A2 |
A high intensity discharge (HID) assembly comprises ballast circuits which includes a micro-controller, and an HID headlamp. In order to deter theft of the HID assembly from a vehicle, the micro-controller communicates with a vehicle com...
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WO/2006/043144A1 |
An electronic circuit is provided for controlling the power output of a load connected to the circuit by manipulation of the amplitude of the mains voltage. The load may be fluorescent tube. A sensing circuit coupled to the mains voltage...
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WO/2006/042447A1 |
The present invention discloses an electronic ballast which comprises a main circuit, a load oscillating circuit and a power supply sampling circuit, wherein the main circuit comprises a rectification filter circuit whose input is connec...
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WO/2006/043248A1 |
A resonant igniter circuit (11) employs a switch ignition branch and a resonant ignition branch. The switch ignition branch includes a pair of ignition switches (M1, M2) connected in series with a switch node (Nl). The resonant ignition ...
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WO/2006/040837A1 |
The power consumption and produced heat of an electronic fluorescent lamp ballast used in plants, office buildings, shops, subway stations, tunnels, and homes are reduced. In the diagram showing the structure of an electronic fluorescent...
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WO/2006/040968A1 |
A cold-cathode tube driving apparatus wherein the number of booster transformers has been reduced and the increase in installation space and in cost has been suppressed. This cold-cathode tube driving apparatus comprises a booster transf...
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WO/2006/037265A1 |
There is disclosed a reactive power controller (RPC) for dimming AC mains lighting systems that use ballasts, for example magnetic ballasts. In one embodiment, a DC/AC converter is used to convert a DC voltage, from a DC voltage source, ...
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WO/2006/035347A1 |
An ignition circuit for generating high voltage pulses to a discharge lamp is provided with a switching element (SW1) to enable to stop generating said high voltage pulses when the lamp does not ignite or has ignited. The switching eleme...
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WO/2006/035346A1 |
To dim a high intensity gas discharge (HID) lamp an inductance is connected in series with said HID lamp. The inductance funcitons as a ballast. The HID lamp is supplied by a frequency adjustable AC voltage supply. Since the impedance of...
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WO/2006/033228A1 |
A light source unit used for backlight for applying light to a display panel of a liquid crystal display device includes a cold cathode tube having a discharge electrode at each end of a glass tube filled with a discharge gas. A coil as ...
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WO/2006/032228A1 |
In order to further improve the ignition of gas-discharge lamps, particularly high-pressure gas-discharge lamps, an ignition circuit arrangement is provided for a gas-discharge lamp to which a supply circuit for providing an alternating ...
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WO/2006/033966A2 |
An energy savings device for an inductive, a resistive or a capacitive load, such as a fluorescent light fixture having a magnetic ballast or an electronic ballast, which is powered by an Ac voltage waveform. The energy savings device in...
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WO/2006/030357A1 |
A hot cathode fluorescent lamp (2) comprises a vessel (4) containing two electrodes (8, 9) at a distance from each other with each electrode having two connection leads (10, 11, 12, 13) extending to the outside of the vessel. Across each...
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WO/2006/030569A1 |
An inverter (3) of an H-bridge inverter circuit is provided with a bootstrap circuit for driving high potential side switching transistors (15, 16), a high potential power supply unit (4) for constantly supplying a charging current to ca...
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WO/2006/030432A1 |
An illumination unit that comprises a controller, for determining whether to supply power for lighting a lamp in a normal or emergency mode, according to the presence of power from an electricity network and to the state of a switch, nor...
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WO/2006/026943A1 |
The invention relates to a method and a device for operation of ah high pressure discharge lamp with a low-frequency current of alternating polarity, whereby the high pressure discharge lamp is operated during a start phase at a higher p...
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WO/2006/028781A1 |
An improved apparatus and method for control of discharge lighting, such as HID (high intensity discharge) lighting, effects full-voltage start up of the lighting, and sustained operation of the lighting at a reduced voltage after a sele...
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WO/2006/025674A1 |
A ballast for a CCFL is provided. The ballast includes a power source 100 for receiving an AC voltage, a rectifier circuit 102 for converting an input AC voltage from the power source 100 into a DC voltage, a power factor conditioner 104...
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WO2006004879B1 |
A push/pull switch control is incorporated into the surface pattern of a wall box dimmer having a planar face surface. The switch control is finger nail operated and contains a finger nail groove which is accessible on the bottom end sur...
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WO/2006/021901A1 |
A fluorescent lamp (2), in particular a backlight lamp of a display device, is supplied with an alternating voltage, a frequency and an amplitude of which being greater during ignition than during normal operation of the lamp. The voltag...
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WO/2006/019888A2 |
A push-pull driver for powering fluorescent lamps (110) in a backlight system includes a transformer (100) with three primary windings (102, 104, 106) to realize the advantages of both a push-pull switching topology and a full bridge swi...
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WO/2006/016335A1 |
A method and a circuit arrangement are described for operating a discharge lamp is described, especially a high-intensity discharge lamp or lamps (HID) or UHP [ultra high performance] -lamp, which is/are distinguished by a first and a se...
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WO/2006/016640A1 |
A piezoelectric transducer drive circuit comprising a variable current source (12) being controlled by a differential operational amplifier (11), a constant current source (15) and a switch means (13) connected in series with the variabl...
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WO/2006/016334A1 |
The present invention relates to an apparatus and a method for eliminating electric arc in the field of lighting electronics. Whether or not electric arc is likely to be produced is determined through monitoring the current variation in ...
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