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WO/2009/132485A1 |
An adaptive sliding-frequency triggering ignition method for electronic ballast of high pressure gas discharge lamp includes the steps of: measuring an accurate value of free oscillation frequency of the ballast load loop by using a sing...
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WO/2009/132715A2 |
The present invention relates to a novel arrangement and method for eliminating power failures, especially due to glitches, in a device comprising: electrical components configured to be supplied with power, a power source for supplying ...
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WO/2009/134592A1 |
A lighting ballast (10) includes an inverter portion (12) and a resonant portion (14). During a preheat phase, a filament transformer (110) supplies preheat glow currents to lamp cathodes. Also during the preheat phase, the filament tran...
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WO/2009/129860A1 |
The present invention relates to a method for operating at least one discharge lamp (LP) in a circuit arrangement comprising an input with a first and a second input connection for connecting a DC supply voltage (U Zw); an output with at...
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WO/2009/130808A1 |
A power converter includes a conversion circuit, a control circuit, a simulation circuit and a detection circuit. The conversion circuit includes a magnet element and a switching element for power conversion and is structured to convert ...
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WO/2009/129581A1 |
An apparatus for driving a voltage source such as a discharge or LED lamp using a power booster receiving an AC voltage source configured through an inductor to turn on and off periodically in response to a duty cycle of a dimming contro...
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WO/2009/130994A1 |
A high voltage discharge lamp lighting device (10) includes power source circuits (20, 30, 40, 50), and an initiation circuit (60). The power source circuits (20, 30, 40, 50) have a pair of output terminals (55, 56) electrically connecte...
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WO/2009/130861A1 |
Provided is an inverter device which can easily prevent generation of flickers in a light emission device even when the light emission level of the device is lowered. The inverter device includes: a rectifier (2) which performs full-wave...
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WO/2009/127257A1 |
The present invention relates to a high-pressure discharge lamp (10) with a burner (12); a reflector (14) which is coupled to the burner (12) in order to reflect light emitted from the burner (12) in a direction which is predetermined by...
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WO/2009/127252A1 |
The resonant circuit for producing a lamp ignition voltage in an electronic ballast for a high-pressure discharge lamp has an inductive element (12) and a capacitive element (10), wherein, according to the invention, the capacitive eleme...
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WO/2009/127259A1 |
The present invention relates to an operating device (12) for operating a high-pressure discharge lamp (14) coupled thereto, wherein the operating device (12) comprises a memory device (22), wherein at least one characteristic of a high-...
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WO/2009/125660A1 |
Short rise and fall of a lamp voltage in frequency control of a high pressure discharge lamp device are suppressed. The high pressure discharge lamp lighting device AC-lights a high pressure discharge lamp having a pair of facing electro...
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WO/2009/126472A1 |
A lamp filament preheating circuit using modified flyback topology which gives pulsating AC in the secondary of the flyback transformer. The circuit may be controller based or implemented by a monoshot and astable multivibrator. A self-o...
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WO/2009/125661A1 |
Provided is a high-pressure lamp lighting device capable of controlling a lamp voltage properly even if a usable lighting frequency is limited. The high-pressure discharge lamp lighting device is turned on with a synthesized current wave...
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WO/2009/122334A1 |
The present invention relates to a detection circuit (100) capable to detect a rectified phase-cut or sinusoidal waveform using its duty cycle or average value and in response, to select the respective dim mode amongst the linear phase-c...
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WO/2009/122678A1 |
After the start-up operation of a high-pressure mercury lamp (4) has ended, the lamp current is controlled to a constant value to effect a transition to lighting using constant power. Except for a fixed period of time during which modula...
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WO/2009/121508A1 |
The invention relates to an electronic ballast for operating a lamp (11), particularly a gas discharge lamp, comprising: at least two voltage terminals (2, 3) for connecting a supply voltage, a transformer (23), the primary winding (24) ...
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WO/2009/121627A2 |
An inductive component, for example, a throttle for an electronic circuit for powering a discharge light, has an effective magnetic volume of 900 mm3 or less at a lateral dimension which is 20 mm or less in one direction, wherein the fer...
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WO/2009/121493A1 |
In the field of electronic ballast devices, ballast devices are known that can be used with different types of lamps. With those so-called multi-lamp ballast devices, there is a need to precisely detect the lamp and thus the wattage ther...
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WO/2009/122209A1 |
The control circuit comprises a charge pathway for charging a capacitor, and a discharge pathway for discharging the capacitor to a flash lamp, the charge pathway comprising a path including a sequence of conductors and electronic compon...
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WO/2009/122232A1 |
A protection device for an electronic converter, e.g. for halogen lamps, includes a comparator (10) powered via a supply voltage (Vcc). The comparator (10) has an output (Vo), non-inverting (14) and inverting (12) inputs sensitive to a f...
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WO/2009/122612A1 |
Provided is an inverter circuit which can suppress increase of an EMI level. The inverter circuit (20a) is provided with a drive circuit (21) for outputting a pulse signal (S2); a transformer (22), which has one end of a secondary windin...
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WO/2009/120555A1 |
Methods, systems, and devices are described for sensing a phase-cut dimming signal and outputting a control signal compatible with a switching power circuit. Embodiments of the invention generate at least one of a low-frequency pulse-wav...
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WO/2009/118128A1 |
The invention relates to a circuit arrangement for operating a gas discharge lamp, with a full-bridge circuit to which a DC voltage (UO) is applied and which comprises four controllable switches (S1-S4), wherein a gas discharge lamp (EL)...
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WO/2009/119233A1 |
Each discharge tube lighting device comprises a saw-tooth wave oscillator for generating a saw-tooth signal, by which a plurality of switching elements for feeding an electric current to the primary winding of a transformer in a resonanc...
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WO/2009/118134A1 |
In order to start a gas discharge lamp connected in a resonance circuit in a bridge branch of a full bridge circuit, at least two switches (S3, S4) of a half bridge connected in series are cycled at a high-frequency complementary to the ...
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WO/2009/118617A1 |
A hair-growth adjusting light emitting device includes a device body, a light-emitting unit attached to the device body, and a locking unit for locking the light-emitting unit to the device body. The device body has a main capacitor, a d...
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WO/2009/118696A1 |
The present invention provides a system for the control of voltage supplied by an AC source, across a load; the system includes a load requiring a constant supply of voltage. A load parallel inductor (LPI) is connected in parallel to the...
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WO/2009/115983A1 |
The present invention discloses a lamp end-of-life protection circuit for being used in a ballast control circuit of a high-intensity discharge lamp, which comprises a feedback circuit for detecting an ignition state of the high intensit...
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WO/2009/115962A1 |
A switched mode power supply (20) for driving a load (11) comprises: an inductor (L) in series with the load; at least one controllable coil switch (12) in series with the inductor (L); a controller (14) for controlling the coil switch. ...
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WO/2009/115260A1 |
The invention relates to a circuit for controlling the power of a gas discharge lamp, comprising: a half bridge circuit or full bridge circuit, having two switches and two capacitances, wherein the gas discharge lamp is connected in the ...
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WO/2009/115120A1 |
The invention relates to a method for minimizing the insulation stress of a high-pressure discharge lamp system, comprising an operating device that generates a high voltage for starting the high-pressure discharge lamp, wherein an ignit...
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WO/2009/115117A1 |
The invention relates to a lamp system comprising a gas discharge lamp (10) that comprises a lamp bulb (12) that is filled with a filling gas consisting of an inert gas or an inert gas mixture at a cold filling pressure and within which ...
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WO/2009/113201A1 |
Disclosed is an illuminating device comprising a light source (17), a power supply (170) for supplying a driving power to the light source (17), and a relay member (150) for electrically connecting the light source (17) and the power sup...
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WO/2009/113384A1 |
A discharge tube lighting device is provided with resonance circuits (5a to 5d ) where capacitors (C3a to C3d ) are connected to at least primary windings (P1 to P4 ) or secondary windings (S1 to S4) of transformers (T1 to T4) and discha...
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WO/2009/112180A2 |
The invention relates to a method for testing whether at least two gas discharge lamps (L1, L2) to be operated with an electronic ballast (V) are the same type. The coil voltage and the coil current of each hot coil (W1b, W2b) of each ga...
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WO/2009/114528A2 |
The present High Intensity Discharge electronic lamp ballast uses a "set of controls" that can be performed by controlling energy delivery by the "line side converter" to the "lamp side inverter". This set of controls comprises: 1 ) open...
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WO/2009/111944A1 |
An HID ballast (400) with a voltage multiplier and lamp temperature compensation. The ballast (400) includes a temperature compensation circuit (411) and a processing unit (413). The temperature compensation circuit (411) detects a volta...
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WO/2009/111110A1 |
In a lighting ballast there are typically several discrete components that combine to take an external AC signal and convert it to a DC signal, and back to an AC signal for powering a lamp. Several of these components can be housed on an...
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WO/2009/109326A1 |
The invention relates to a circuit for heating and monitoring hot coils (W1b, W2b) of at least one gas discharge lamp (L1, L2), for coil breaks, operated with an electronic ballast. Each of the hot coils (W1b, W2b) that are to be monitor...
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WO/2009/111601A2 |
An electrical control circuit detects a sensed value on a load (500) and outputs an analog sensor signal (106). The analog sensor (106) signal is passed through a plurality of isolation couplers (200,300) which isolate a controller from ...
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WO/2009/109325A1 |
The invention relates to a method for determining the type of gas discharge lamp (L) to be operated with an electronic ballast (V). According to said method, the coil voltage and the coil current are measured according to two successive ...
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WO/2009/110750A2 |
The present invention relates to an LED lighting device, more particularly to an LED lighting device which can control LED brightness of two colors or more by counting the number of control signals (the number of pulses) outputted from a...
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WO/2009/109224A1 |
The invention relates to a circuit arrangement for starting and operating a gas discharge lamp, comprising a converter without control loop, the power output thereof depending on its input voltage, and the converter being controlled by m...
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WO/2009/109223A1 |
The invention relates to a system of a lamp (1) and an electronic ballast (11) having an operating time measuring device (15) that is automatically reset when a new lamp (1) is inserted, the electronic ballast (11) allowing operation of ...
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WO/2009/107460A1 |
A lighting device is characterized by comprising a light source (17), a power source (170) for supplying driving electric power to the light source (17), and a relay electrode (152) for electrically connecting the light source (17) and t...
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WO/2009/108441A1 |
In an instant start ballast, dimming control is provided over a range of operation in which lamps driven by the ballast do not require external cathode heating. An interface circuit (92) includes a winding (90) that is inductively couple...
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WO/2009/107019A2 |
The invention describes a method of driving a gas-discharge lamp (1), wherein the lamp (1) is driven at any one time using one of a number of driving schemes and wherein the operating voltage of the lamp (1) is monitored to obtain a numb...
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WO/2009/107503A1 |
Provided is a discharge lamp control circuit with a ground fault protection function capable of, while suppressing mercury migration, detecting a ground fault in a highly safe manner. A discharge lamp (1) is connected to the discharge la...
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WO/2009/106120A1 |
The invention relates to a device for generating an ignition voltage for a lamp, comprising a first resonance circuit connected to the lamp by means of a switch, wherein a second resonance circuit is connected upstream of the first reson...
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