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Patent Searching and Data


Matches 801 - 850 out of 32,965

Document Document Title
WO/2009/104137A1
A switch mode power control and mains isolation arrangement, comprising: a power transistor switch arrangement; one or more power transformers (108); a load e.g. a backlight unit (114); a pre-controller (147); a mains isolation element (...  
WO/2009/104508A1
Provided are a backlight device in which the design freedom concerning the disposal position of a circuit board on to which circuit components are mounted can be kept by simplifying the structure of a lamp as a lighting circuit and reduc...  
WO/2009/105247A1
A self-magnetically confined lithium plasma that has an applied axial magnetic field is irradiated at sub-critical density by a perpendicularly oriented carbon dioxide laser to generate extreme ultraviolet photons at the wavelength of 13...  
WO/2009/104113A1
A high voltage transformer is described with an elongate core (38) out of a ferromagnetic material. A transformer frame (36) out of plastic material has segment walls (40) arranged perpendicular to the core (38). A secondary- winding is ...  
WO/2009/104938A2
The present invention relates to a lighting lamp control device, system and method. The lighting lamp control device of the present invention includes a processor for controlling each component in accordance with a firmware; a signal gen...  
WO/2009/101554A1
An electronic starter (100) comprises a housing (130) with a bottom face (133) and main input connector terminals (131, 132) projecting externally from the bottom face (133); an electronic switching circuit (150) arranged in the housing ...  
WO/2009/100755A1
The invention relates to a method for operating a high-pressure discharge lamp, wherein to reduce the current operating power (P1) to a lower target power (P12), said operating power (P1) is decreased in line with a ramp of duration (t11...  
WO/2009/101544A2
The present invention relates to a control circuit of a dimmer assembly for dimming an energy-saving lamp, in particular a gas discharge lamp, the dimmer assembly comprising a dimmer circuit and the control circuit for controlling the ou...  
WO/2009/101743A1
Disclosed is an automotive discharge lamp comprising an inner tube (1) including a light emitting unit (11) having a first space (15) therein and a seal portion formed in the light emitting unit (11), a discharge medium containing a firs...  
WO/2009/102506A1
A circuit or combined ballast for driving a fluorescent lamp and at least one light emitting diode (LED) includes an integrated driver circuit having an alternating current (AC) circuit that includes at least one ballast coil for driving...  
WO/2009/101552A1
An electro magnetic ballast (110; 210) for a gas discharge lamp (2) comprises: input terminals (3), for receiving a mains voltage; lamp connector terminals (4), for receiving a lamp; an impedance connected in series with the lamp connect...  
WO/2009/099422A1
Methods and apparatus for powering a ballast that is dimmable and has a high power factor. The ballast circuit includes a rectifier, bypass capacitor, a driver circuit, and a resonant circuit that are configured to actuate a light source...  
WO/2009/099711A1
A ballast circuit is suitable for driving a high intensity discharge lamp in at least two power modes including a nominal power mode for driving the high intensity discharge lamp at a nominal power and a reduced power dimming mode for dr...  
WO/2009/098800A1
A lighting device (8) including a cold-cathode fluorescent tube (light source) (9) comprises an inverter circuit (16) connected to the cold-cathode fluorescent tube (9) and able to drive the cold-cathode fluorescent tube (9) by PMW dimmi...  
WO/2009/099645A1
Methods and apparatus for saving energy in a ballast comprising a tank circuit for a gas-discharge lamp are disclosed. A feedback circuit and a filament shutoff circuit cooperate to detect energy in the tank ballast and save energy durin...  
WO/2009/099979A1
A backlighting arrangement constituted of: a driving transformer; at least one balancing transformer; a plurality of luminaires, a first end of each of the plurality of luminaires connected to a high voltage lead of the driving transform...  
WO/2009/099978A1
A backlighting arrangement constituted of: a means for receiving an alternating current comprising a first lead and a second lead; at least one luminaire; and at least one first balancing transformer pair each associated with a particula...  
WO/2009/098790A1
[PROBLEMS] To provide a multi-output high frequency step-up transformer for a fluorescent tube for lighting with high current accuracy a plurality of juxtaposed fluorescent tubes to be used as a backlight of a liquid crystal display pane...  
WO/2009/096417A1
Provided is a high-voltage discharge lamp lighting device comprising a converter, an inverter, an igniter, a controller and a pulse-voltage detecting circuit. The converter is constituted to output a DC voltage. The inverter is constitut...  
WO/2009/096173A1
When an electric power switch is turned on, a signal generation circuit generates a start-up video signal for an entire white display for a predetermined period of time. A selector outputs the start-up video signal generated by the signa...  
WO/2009/095584A1
The invention relates to a light flash generator that comprises a discharge lamp (1), a DC supply circuit (6) for the discharge lamp capable of generating a voltage V2 between the anode (2) and the cathode (3), a priming circuit (5) for ...  
WO/2009/096166A2
A high-pressure discharge lamp system has a high-pressure mercury lamp 4 and a lighting circuit 3 that operates the lamp 4. The lamp 4 includes an envelope having a light emitting part 6 having a first and a second electrode 10, 11 arran...  
WO/2009/096424A1
Provided is a high-voltage discharge lamp lighting device comprising an inverter, an igniter, a controller, a pulse-voltage detecting circuit and a starting pulse-voltage adjusting circuit. The inverter is constituted to apply a lighting...  
WO/2009/095649A1
This invention relates to a circuit for controlling a power converter featuring BJTs, through use of a control winding on the transformer that provides the base drive for the BJTs. This controller can control the control winding current,...  
WO/2009/092439A1
The invention relates to a method for regulating a light source (5) to which a DC-DC converter (11) supplies power. In said method, in which a control value is regulated by predefining a desired value for an operational parameter of the ...  
WO/2009/092449A1
The invention relates to a method for improving the starting properties of a high-pressure discharge lamp, wherein said high-pressure discharge lamp, after a predetermined first time span after the shutdown, is operated again for a prede...  
WO/2009/092447A2
The present invention relates to a circuit arrangement for regulating the current through at least one discharge lamp having a control loop (10) comprising: a target value input for supplying a target value (UTarget); an actual value inp...  
WO/2009/092448A1
The invention relates to an electronic ballast for controlling at least one light source (La). Said electronic ballast comprises: an input for connecting a supply voltage (Uv); an output (A) for connecting the at least one light source (...  
WO/2009/090147A1
In order to reduce the amount of wiring complexity involved in conventional starting devices for gas discharge lamps, the invention proposes a starting circuit arrangement in which the lamp, in order to provide an AC supply voltage (UN),...  
WO/2009/089918A1
The invention relates to an electronic ballast for operating at least one gas discharge lamp, comprising a first output connection having a primary side (PW1) and a secondary side (SW1) for coupling to a first coil (W1) and a second outp...  
WO/2009/087729A1
Disclosed is a lighting circuit, which feeds an electric power to a light emitting tube for emitting a light when discharged, and a light emitting element arranged close to the light emitting tube and having higher luminous-flux rising c...  
WO/2009/087748A1
A discharge lamp (1) is provided with a luminous tube (10); an auxiliary bulb (30); a lighting unit (40) including a timer circuit; and a thermal fuse (71) which detects heat from the auxiliary bulb (30). When the auxiliary bulb (30), i....  
WO/2009/087747A1
As the time period from turning off a discharge lamp (OFF) to turning on the discharge lamp again (ON) becomes shorter than a time period (T1) during which the natural discharge of a capacitor (C11) is completed, the lighting time of an ...  
WO/2009/084759A1
An electrode of a hot cathode fluorescent lamp includes a pair of lead wires which are inserted from the outside into a glass tube, passing through a leading end of the glass tube, ends of each of the pair of lead wires protruding outwar...  
WO/2009/084569A1
Provided is an electric discharge lamp lighting device (10) including a control section (40) which performs first control operation for controlling at least the current value, frequency, duty ratio or waveform of a driving current (I) fo...  
WO/2009/081668A1
In lighting equipment which controls power supply to a lamp (11) according to the accumulated lighting time and a light control signal (14), a maximum power supply to the lamp (11) dependent on the accumulated lighting time is supplied t...  
WO/2009/079944A1
An adaptive fluorescent lamp driver circuit (10) for adapting a fluorescent lamp (12) to a power source (14), the fluorescent lamp including a vapour-filled tube and two filaments projecting within the tube, the adaptive fluorescent lamp...  
WO/2009/077951A1
A wake-up lighting device is described, comprising a gas discharge lamp (10) and a lamp driver (1; 2) comprising a power source (100) capable of generating spaced-apart current bursts (51) of alternating lamp current (I). The wake-up lig...  
WO/2009/077911A1
A compact gas discharge lamp (301) comprising four (or more) interconnected tube segments (11, 12, 13, 14) is provided with an external electrode (310) that extends at least throughout the length of the tube segments and that is in conta...  
WO/2009/075940A1
A ballast with self-oscillating inverter and a high- voltage multiplier circuit is disclosed for providing a DC start mechanism for starting an HID lamp. The high voltage multiplier ignites the lamp using direct current (DC) voltage. Thi...  
WO/2009/072051A1
The invention describes a method of driving a gas-discharge lamp (1) wherein, at any one time, the lamp (1) is driven according to one of a plurality of different driving schemes (DS 1 , DS 2 ) and the lamp power is controlled according ...  
WO/2009/069061A1
A method of igniting a gas discharge lamp (2) comprises the steps of first applying a plurality of high- voltage ignition pulses with a relatively low amplitude and subsequently applying high- voltage ignition pulses with a relatively hi...  
WO/2009/070153A1
A lighting system comprising a first plurality of fluorescent lamps (17) constituted by a first and a second lamp (20, 21) having a first common terminal (18) which is connected via a first capacitor (22) to a first terminal (12) of a vo...  
WO/2009/067927A1
A device for lightening several fluorescent lamps includes: an active filter circuit (11), a high frequency rectifier filter circuit (12), a high frequency chopper power output circuit (13) and current phase shift, current limiting, reso...  
WO/2009/069052A1
A method is described for reducing infrared emission from a gas discharge lamp (2) driven in a dimmed condition, the lamp having a nominal rating corresponding to a nominal lamp current magnitude (Im) and a nominal light output. The meth...  
WO/2009/067931A1
A multi-output lightening electric light source device,includes an active filtering circuit, a high-frequency rectification filtering circuit, a high-frequency switch power supply control circuit, a pulse delay phase-shift circuit, three...  
WO/2009/066508A1
A control circuit controls on/off of the switching elements in a step-down chopper circuit and an igniter circuit synchronously, and controls on/off of the switching elements in the step-down chopper circuit depending on the drop width o...  
WO/2009/062835A1
The invention relates to a lighting system comprising a DBD lamp (DBD) and an electronic ballast having a rectangular transducer (S1 - S4) and a charge inductance (L1, L2).  
WO/2009/062542A1
The invention relates to a circuit assembly for operating a high pressure discharge lamp (La), comprising an operating circuit for the high pressure discharge lamp, an input for receiving a switch on/switch off signal for the high pressu...  
WO/2009/062554A1
The invention relates to an auxiliary current supply in, for example, a discharge lamp. A first capacitor (C2) is initially charged by a direct current intermediate circuit or a direct current supply connection (Uzw). When a specific vol...  

Matches 801 - 850 out of 32,965