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| Number | Title | Issue Date |
| 7541726 | Lamp filament A base-up incandescent lamp (10) includes a coiled-coil filament (14) that has a primary wire (18) and a secondary wire (16), the primary wire (18) comprising an overwind that overlies the secondary wire (16) and provides a ... | 06/02/2009 |
| 7528556 | Light regulation device A light regulation device includes at least one light sensor which provides at its output a real brightness value, at least one regulator to which a set brightness value can be supplied, besides the real value, and a number n of output connections, n being greater t... | 05/05/2009 |
| 7486025 | UV depreciation sensor A lamp having a measurable ultra violet light emission and having thereon a first marking revealing at least the operating characteristics of said lamp and a second marking evidencing a change in characteristics in response to exposure to ultra violet emissions. In ... | 02/03/2009 |
| 7474084 | Circuit arrangement and method for driving a gate of a transistor, in particular a MOSFET The present invention relates to a circuit arrangement for driving a gate of a transistor, in particular a MOSFET, which is arranged in an electronic ballast, the circuit arrangement (2) being designed for the variable driving of the gate (221) as a fu... | 01/06/2009 |
| 7470055 | Mounting structure for LED lighting systems A mounting structure for LED lighting sources, includes a support body having attached on one side thereof a circuit board for mounting the LED lighting sources. The circuit board is preferably a printed-circuit board with conductive traces to feed electrical power ... | 12/30/2008 |
| 7459661 | System for evaluating luminance and movement within an observation space, and method for controlling light sources within the observation space A sensor system has a video camera and an evaluation unit, the evaluation unit receiving a video signal from the video camera and providing output information relating to luminance and movement of an observation space. The evaluation unit can include a microcontroll... | 12/02/2008 |
| 7459861 | Lamp containing voltage conversion circuit including forward/reverse hybrid phase-control clipping circuit A lamp contains a lamp voltage conversion circuit which includes a forward/reverse hybrid phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control clipping circuit has a time-based pulse source that tri... | 12/02/2008 |
| 7459867 | Program start ballast A ballast (10) for powering at least one gas discharge lamp (70) in a program start mode comprises an inverter (200), a resonant output circuit (400), and a control circuit (600). During operation of ballast (10), control ci... | 12/02/2008 |
| 7460378 | Overload protection arrangement for electronic converters, for instance for halogen lamps A circuit arrangement for protecting an electronic converter against overloads includes: a low impedance path selectively activatable to prevent ignition of the electronic converter, the low impedance path including an electronic s... | 12/02/2008 |
| 7456588 | Arrangement and method for providing power line communication from an AC power source to a circuit for powering a load, and electronic ballasts therefor An arrangement (900) and method (1000) for providing power line communication from an AC power source (910) to a circuit (900) for supplying power to a load (960), as well as electronic ballasts (20,30,40,70,80) that operate... | 11/25/2008 |
| 7456578 | Circuit arrangement having protective circuit and modification apparatus A circuit arrangement has a drive circuit for a lamp having a first connection for a first filament of the lamp and a second connection for a second filament of the lamp, a protective circuit, coupled on the output side to the drive circuit and on the input side to ... | 11/25/2008 |
| 7446488 | Metal halide lamp ballast controlled by remote enable switched bias supply A vehicle lighting system receives power from a power supply and includes a lighting control module, a lamp, and a ballast having a bias control circuit. The lighting control module provides a remote enable signal to the ballast in response to an input. The bias con... | 11/04/2008 |
| 7443106 | Circuit with switch-off device for the operation of light sources Circuit with a switch-off device for the operation of light sources The invention relates to a circuit with a switch-off device for the operation of light sources (Lp), have the following features: a self-commutated half-bridge inv... | 10/28/2008 |
| 7443109 | LED current pulse limiter arrangement An arrangement for supplying a constant current to at least one LED includes a current source (2; 2a, 2b) with an output capacitor (3) connected across the terminals of the current source. An output inductor (4) is associate... | 10/28/2008 |
| 7439680 | Apparatus for safely connecting the lamp to the equipment voltage ground Apparatus for safely connecting a lamp to an equipment voltage ground, includes a rectification circuit for rectifying the power supply alternating voltage into a direct voltage, and an oscillating circuit for converting the direct voltage into alternating voltage f... | 10/21/2008 |
| 7432664 | Circuit for powering a high intensity discharge lamp 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 (SW1,SW2), a tran... | 10/07/2008 |
| 7432663 | Circuit for igniting a high intensity discharge lamp A circuit (300) for igniting a high intensity discharge (HID) lamp comprises input terminals (302,304), output terminal (306,308), a charging circuit (RIGN,CIGN), a transformer (320) having a primary winding (322 | 10/07/2008 |
| 7432662 | Circuit arrangement and method for operating at least one lamp The present invention relates to a circuit arrangement for operating at least one lamp (LA), which has a first filament (W1) and a second filament (W2), it comprising an apparatus (10) for determining a variable which is correlated with the temp... | 10/07/2008 |
| 7420334 | Electronic ballast for a lamp An electronic ballast for a lamp having a bridge circuit, includes at least one first switch and a second switch coupled between a connection for a supply voltage and a connection for a ground potential, a center point of the bridge circuit between the first switch ... | 09/02/2008 |
| 7402956 | Ballast with zero voltage switching converter A ballast (10) for powering at least one gas discharge lamp (20) comprises a switching converter (100) and an inverter (900). Switching converter (100) includes a transistor (130) and a control circuit (200) that prov... | 07/22/2008 |
| 7394207 | Circuit arrangement having a full bridge with switching load relief for operating lamps The invention relates to a circuit arrangement for operating lamps. The circuit arrangement essentially comprises a full bridge. According to the invention, at least one inductor is connected in series with a full-bridge branch for switching load relief purposes. Th... | 07/01/2008 |
| 7388335 | Apparatus for providing a sinusoidally amplitude-modulated operating voltage, lighting system and method for generating an amplitude-modulated voltage In the case of an apparatus for providing a sinusoidally amplitude-modulated operating voltage, two switches are arranged in the form of a half bridge, and an LC element is arranged downstream of the half bridge. The first switch is driven by a first square-wave sig... | 06/17/2008 |
| 7385353 | Low-pressure discharge lamp The invention relates to a low-pressure discharge lamp comprising a glass discharge vessel (1) which is substantially tubular in form and which is closed in a gas-tight manner on the ends thereof, a filling consisting of an inert gas mixture and quicksilver, ... | 06/10/2008 |
| 7378800 | Starting apparatus for a high-pressure discharge lamp and high-pressure discharge lamp having a starting apparatus and operating method for a high-pressure discharge lamp A starting apparatus for a high-pressure discharge lamp provided with an auxiliary starting electrode, has a series resonant circuit for the purpose of generating the starting voltage for the high-pressure discharge lamp. The resonant inductance of the series resona... | 05/27/2008 |
| 7375475 | Lamp containing power controller having current limited RMS regulated output A lamp contains a voltage conversion circuit that converts a line voltage to an RMS load voltage and includes a switch and a microcontroller that operates the switch to define the RMS load voltage. The microcontroller senses a load voltage of the lamp, compares the ... | 05/20/2008 |
| 7374457 | Inline quick disconnect system with strain relief A lighting system (10) has: a fixture (12) with an axis of orientation (14); and a light source (16) mounted within the fixture (12). A ballast (20), usually positioned on the side of the fixture away from the light source, ... | 05/20/2008 |
| 7361040 | Base with integrated heatsink for compact fluorescent lamps A subassembly (10) for a lamp base, the subassembly (10) has an outer (12) housing having a circumferential wall (14) and a top (16) closing one end (18) of the outer housing (12); at least one lamp receiving aperture... | 04/22/2008 |
| 7358689 | Phase-control power controller for converting a line voltage to a RMS load voltage A phase-control power controller converts a line voltage to an RMS load voltage and includes a phase-control clipping circuit that clips a load voltage to provide the RMS load voltage. The power controller may be in a base of a lamp and connected to a lamp terminal.... | 04/15/2008 |
| 7355348 | Ballast for a discharge lamp having a continuous-operation control circuit The invention relates to a novel ballast for a discharge lamp, in which a continuous-operation control circuit is brought out of operation when a physical operation, which defines a preheating time, of a preheating timer has as yet not been sufficiently returned if ... | 04/08/2008 |
| 7355356 | Circuit arrangement and method for detecting a crest factor of a lamp current or a lamp operating voltage of an electric lamp The invention relates to a circuit arrangement for detecting a crest factor of a lamp current or a lamp operating voltage of an electric lamp (2), the circuit arrangement having a first subcircuit (15), which is designed to determine an averaged value ... | 04/08/2008 |
| 7352134 | Lamp containing fixed reverse phase switching power supply with time-based phase pulse triggering control A lamp contains a lamp voltage conversion circuit within the lamp and connected to a lamp terminal. The voltage conversion circuit includes a phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control cli... | 04/01/2008 |
| 7352079 | Electronic ballast for a lamp An electronic ballast for a lamp has a DC voltage connection; a switching unit having a supply voltage with the DC voltage connection being coupled thereto, and a first capacitor coupled between the supply voltage connection and a reference potential; an AC voltage ... | 04/01/2008 |
| 7348734 | Method for protecting a ballast from an output ground-fault condition A method (700) for protecting a ballast from an output ground-fault condition includes the steps of applying power to the ballast (step 710), providing a startup delay period for a DC-to-DC converter (step 730), monitoring a voltage across a DC ... | 03/25/2008 |
| 7342359 | Forward/reverse hybrid switching power supply with time-based pulse triggering control A phase-control power controller that converts a line voltage to an RMS load voltage includes a fixed phase forward/reverse hybrid phase-control clipping circuit that performs phase-control clipping of a load voltage to provide an RMS load voltage. A conduction angl... | 03/11/2008 |
| 7309963 | Smoothing circuit for improving EMC The present invention relates to an electronic ballast for discharge lamps, for example low-pressure discharge lamps, having a converter having a switching element and a two-part lamp inductor which is connected upstream and downstream of the discharge lamp. An elec... | 12/18/2007 |
| 7307387 | Switchable voltage converter A voltage converter, whose topology can be switched over between a boost converter and a SEPIC. The boost converter has ripple current compensation. As a result, the inductors used can be utilized in optimum fashion. A thyristor which is protected against breakdown ... | 12/11/2007 |
| 7288900 | Illumination system having at least two light sources, and a method for operating such an illumination system An illumination system has at least two light sources of which at least one light source includes an LED, and a driver device designed to operate at least the one LED with a DC signal; a sensor device for determining at least one feature of the light output; an actu... | 10/30/2007 |
| 7288015 | Method of manufacturing a lamp assembly having a retainer connecting a stem to a lamp capsule A stem and lamp capsule are connected together as an assembly using a retainer such that the stem is clamped to one end of the retainer and the capsule is clamped to the other end of the retainer. An oxidizable fuse is connected between leads of the capsule and elec... | 10/30/2007 |
| 7279848 | Electronic ballast for a lamp An electronic ballast for a lamp having a bridge circuit, includes at least one first switch and a second switch, a center point of the bridge circuit between the first and second switch, the center point coupled on one side to a reference potential via the series c... | 10/09/2007 |
| 7276859 | Three-phase electronic ballast with improved three-phase EMI filter A ballast (20) for powering at least one gas discharge lamp (52) from a three-phase AC voltage source (30) comprises a three-phase rectifier circuit (200), a high frequency filter capacitor (300), a high frequency inverter (400 | 10/02/2007 |
