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WO/2011/020199A1 |
This invention provides an integrated power supply for a controller of an electronic ballast for a fluorescent lamp. The integrated power supply couples output power from the electronic ballast and uses the coupled power to provide power...
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WO/2011/022718A2 |
A sleep circuit for use in a resonant inverter is disclosed. The sleep circuit activates "sleep mode" (noncontinuous operation) when the inverter output has no connected load, or a connected load is non-operative (eg, fails). The "sleep ...
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WO/2011/021096A1 |
An embodiment relates a method comprising creating a reversible change in an electrical property by adsorption of a gas by a composition, wherein the composition comprises a noble metal-containing nanoparticle and a single walled carbon ...
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WO/2011/022116A2 |
A method for starting a high intensity discharge lamp and a ballast incorporating same. The method includes obtaining a cumulative probability function of breakdown times, P(t), for the lamp at a voltage, V; determining a minimum pulse l...
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WO/2011/018324A1 |
The invention relates to a method for controlling a voltage transformer (10) for operating a switchable load (51), with at least one inductance (L) and a switch (5) which is controlled using a digital control device (20), wherein, when t...
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WO/2011/020016A1 |
Apparatus and associated methods involve operation of an LED light engine in which a relative intensities of selected wavelengths shift as a function of electrical excitation. In an illustrative example, current may be selectively and au...
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WO/2011/015468A1 |
In circuitries of the type used so far, amperage is measured during the ignition of a discharge lamp (LP) and is controlled by varying the frequency of this ignition current. The same type of control is now also used to adjust the prehea...
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WO/2011/012373A1 |
The present invention relates to an electronic ballast (10) for operating at least one discharge lamp having an input having a first and a second input connection for coupling to a DC supply voltage, wherein the second input connection i...
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WO/2011/009187A1 |
A method and apparatus are provided for operating a control switch. In one embodiment, the control switch includes an input terminal coupled to an alternating current (AC) power supply, a load terminal coupled to a load, a triac circuit ...
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WO/2011/010481A1 |
A high-voltage transformer driving circuit (12) and a high-voltage transformer (13) drive a discharge tube (1). A tube current synthesizing/high-pass filter circuit (15) synthesizes the tube current of the discharge tube (1), and extract...
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WO/2011/010269A2 |
A lighting device that is of reduced size and lower cost is obtained by realising changes in output through the use of a common coil or switch and the observation of a plurality of input states. A plurality of DC power sources having app...
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WO/2010/104297A9 |
The present invention relates to an active constant power supply apparatus, and more particularly, to an active constant power supply apparatus which can rectify power with a variety of intensities and frequencies without using a high ca...
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WO/2011/010343A1 |
Stable light emission at high luminance is obtained while suppressing power consumption, by specifying an on-period based on a peak current value of a light emitting element, making the maximum amplitude of the pulse in the on-period equ...
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WO/2011/007283A2 |
ABSTRACT OF THE DISCLOSURE An electronic ballast and startup method including an electronic ballast operably connected to a lamp having a lamp filament, the electronic ballast having a timer (110) generating an inverter control signal (1...
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WO/2011/008635A1 |
An LED lamp is provided in which the output light intensity of the LEDs in the LED lamp is adjusted based on the input voltage to the LED lamp. A dimmer control unit detects a type of dimmer switch during a configuration process. Using t...
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WO/2011/003265A1 |
A method for automatically controlling the output power of a gas discharge lamp includes: detecting the luminous decay variation of the gas discharge lamp; according to the detected luminous decay variation, matching a corresponding actu...
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WO/2011/003855A1 |
The invention relates to a method for operating gas discharge lamps (3) comprising a temperature-dependent characteristic current/voltage curve U(I). The method is characterized in that, in order to prevent an unstable operation at low e...
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WO/2011/005393A1 |
A ballast with end∼of∼life ("EOL'') protection is presented in which the voltage across a lamp at EOL is controlled to prevent the lamp from overheating, while the voltage across the lamps not at EOL is maintained to allow normal ope...
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WO/2011/001339A1 |
The present invention proposes a circuit for converting DC into AC pulsed voltage. The circuit comprises two controllable semiconductor switches. By controlling the opening and closing of the semiconductor switches, the circuit can opera...
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WO/2011/000574A1 |
The present invention relates to a method for driving and to an associated command and control device for discharge lamps (2), for example high pressure sodium lamps (2), supplied by an alternating current electrical supply network. Both...
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WO/2011/000189A1 |
A xenon lamp ballast module (4) suited for mains supply is provided, which is connected between a mains alternating current supply (ACV) and a xenon lamp(1). The ballast module (4) comprises an alternating current supply input terminal (...
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WO/2011/002600A1 |
A lighting arrangement constituted of: a power factor correction circuit; a lighting controller operative at an electrical potential consonant with the electric potential of the output of the power factor correction circuit; a switching ...
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WO/2011/001340A1 |
The present invention proposes a circuit for converting DC into AC pulsed voltage. The circuit comprises two or four controllable semiconductor switches as well as a corresponding controller unit. The controller unit controls the opening...
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WO/2010/150113A1 |
A resonant power converter (1) for driving an inductive load as, e.g. an inductively coupled gas- discharge lamp, is designed for operation at an operational frequency (Fop) of 13.56 MHz and comprises: a series arrangement of a first ind...
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WO/2010/150151A2 |
An electronic ballast for supplying a lamp load is described. The electronic ballast comprises an inverter arranged in a half-bridge configuration for providing an AC voltage and at least one lamp load circuit. The inverter comprises an ...
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WO/2010/145535A1 |
A dimmer luminaire includes a power source module (1), a touch-signal conversion unit (5), a microprocessor control unit (6), a driving unit (2), and a main lamp (3). The power source module (1) supplies the driving unit (2) controlled b...
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WO/2010/143944A1 |
The invention relates to a power factor corrector device (500) for a dimming circuit, comprising: a power factor corrector circuit (400) comprising at least one capacitor (Cl, C2), to be coupled to a low frequency DC bridge rectifier out...
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WO/2010/139552A1 |
The present invention relates to an adaptor (10a, 10b) for a fluorescent light (14) having a first (16a) and a second helix (16b) comprising at least one first coupling device (24a, 24b) having at least one first (46a, 46b) and one secon...
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WO/2010/140124A2 |
The present invention provides a method of monitoring performance of a discharge lamp. The discharge lamp includes electrodes and a discharge vessel filled with gas and equipped with a luminescent layer, wherein the gas is intended to em...
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WO/2010/136954A1 |
This invention relates to a power unit for a lighting system. Said power unit includes a mains power input (2), output terminals (3a, 3b) and a power supply (5) for regulating a supply voltage (V1) of the power unit (1). The power unit f...
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WO/2010/138079A1 |
An exemplary embodiment of the invention, a dimmer system and a dimming method employed thereby, is described. The dimmer system communicates AC power having alternating AC current half-cycles to a gas discharge lamp for energizing the g...
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WO/2010/136918A1 |
A luminaire conversion kit for a luminaire with a lamp, the luminaire defining an original space, the conversion kit including a dual capacitor (60) operably connected to the lamp, the dual capacitor (60) having first capacitor (62) and ...
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WO/2010/134397A1 |
Provided is a high-voltage discharge lamp lighting apparatus having a smaller size and a simple structure for lighting a high-voltage discharge lamp that uses a starting light source. The high-voltage discharge lamp lighting apparatus ha...
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WO/2010/133990A1 |
The invention relates to a power supply circuit for supplying power to a lamp, comprising: - an input side to connect the power supply circuit to a dimmer; - an output side to connect the power supply circuit to the lamp; - a capacitor c...
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WO/2010/130292A1 |
The invention relates to an LCD projector having a high-pressure discharge lamp, wherein the luminous intensity of the lamp is adapted to the average brightness of the image during projection, in order to thereby improve the contrast of ...
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WO/2010/131538A1 |
Provided is a high-pressure discharge lamp lighting device in which it is possible to control the number of inversions of the polarity of a lamp lighting current, i.e., the lighting frequency in an appropriate range even for a light sour...
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WO/2010/125843A1 |
A lighting device (3) provided with a cold-cathode fluorescent lamp (light source) (9), and a light-emitting face (10c) that emits light coming from the cold-cathode fluorescent lamp (9), is also provided with; an inverter circuit (drivi...
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WO/2010/126601A1 |
An AC-driven LED circuit includes a first circuit having a first branch and a second branch which connect at first and second common point The common points provide input and output for an AC driving current from a driver of the circuit ...
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WO/2010/125053A1 |
The invention relates to a power-controlled operating circuit (1, 21) for a lighting means (LP, LD) and a method for operating the same. For the power control, the actual power value (Pactual) must be measured and compared with a specifi...
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WO/2010/124314A1 |
The invention relates to an emergency light operating device (1) for a gas discharge lamp (5), wherein the emergency light operating device (1) comprises an isolated PFC as the input stage and a DC/AC converter (4) at the output.
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WO/2010/125487A1 |
A lamp driving circuit and method for driving a gas discharge lamp provided with supply electrodes, and an ignition electrode. A DC supply current is generated by a buck converter having a buck converter operating frequency. An inverter ...
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WO/2010/121968A1 |
The application relates to an RF amplifier for Electrodeless High Intensity Discharge Lamps (EHID). The RF amplifier comprises a plurality of amplifier stages (PA1-PAn) that are coupled between an input signal power divider (PD) and an o...
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WO/2010/120683A1 |
A fluorescent lamp light intensity dimming control generates a pulse width modulation (PWM) signal at about a fifty percent duty cycle and has very fine frequency change granularity to allow precise and smooth light dimming capabilities....
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WO/2010/118626A1 |
The present invention relates to an electronic ballast for a fluorescent lamp and an energy-saving lamp. A multi-function module MK circuit is added to the electronic ballast which is based on a half-bridge inverter circuit. The multi-fu...
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WO/2010/118406A2 |
Various apparatuses and methods for starting a thyristor are disclosed herein. For example, some embodiments provide an apparatus for starting a thyristor, the apparatus including a thyristor, a switch, a load connected to the thyristor ...
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WO/2010/115773A1 |
The invention relates to a circuit arrangement for operating a high-pressure discharge lamp (5) having a straightened arc, comprising: at least one first (Q1) and one second electronic switch (Q2) in a first half-bridge (6); a supply vol...
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WO/2010/116272A1 |
An HID lamp ignitor for a lamp including a transformer (92) having a primary winding (94) inductively coupled to a secondary winding (96) operably connected to a lamp output (98); a first switch circuit (100) operably connected between D...
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WO/2010/115687A1 |
The present invention relates to a circuit assembly for operating at least two different types of discharge lamps, for the operation of which different lamp currents are required. The discharge lamp is connected in series to a coupling c...
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WO/2010/118399A2 |
Various embodiments of a dimmable power supply are disclosed herein. For example, some embodiments provide a dimmable power supply including an output driver, a variable pulse generator and a load current detector. The output driver has ...
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WO/2010/111721A1 |
An operating device for a lamp, comprising at least one circuit board, at least one base plate which has good thermal conductivity and comprises retaining elements, wherein the circuit board has openings in which the retaining elements a...
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