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| Number | Title | Issue Date |
| 8154211 | End-of-life protection circuit and method for high intensity discharge lamp ballast An apparatus and method thereof for igniting and operating a high intensity discharge (HID) lamp during an in service life, and powering down the lamp when an end-of-life (EOL) lamp condition is detected. The apparatus and method defines a series of thresholds of la... | 04/10/2012 |
| 8030850 | Fluorescent lamp driving apparatus with abnormality detection circuit In an apparatus for driving a CCFL, a first inverter outputs a first alternating current (AC) voltage to one end of the CCFL. A second inverter outputs a second AC voltage having a reversed phase to the first AC voltage to the other end of the CCFL. A first current-... | 10/04/2011 |
| 8018165 | End-of-lamp life detection circuit An end of life (EOL) detection circuit for a gas discharge lamp. The circuit includes a comparator for comparing an input voltage to first and second threshold voltages and providing an EOL signal; a sensing circuit for sensing a DC offset in the lamp-voltage during... | 09/13/2011 |
| 7923934 | Battery-powered fluorescent lamp A lamp includes a light source, a power tool battery for providing a DC voltage level, and a base for housing the power tool battery. A stem is coupled to the base and supports the light source. A power inverter converts the DC voltage level to an AC voltage level, ... | 04/12/2011 |
| 7911147 | Limited current circuit of digital inverter for LCD backlight A limited current circuit of this invention comprising: a transformer that raises an alternating current (AC) power supplied from the digital inverter to an AC voltage of a high voltage to light a lamp; a voltage/current detection unit that detects at least one of t... | 03/22/2011 |
| 7847486 | LED lighting system A lighting system has an array (100) of at least one light-emitting solid-state element such as a light-emitting diode (LED) or a laser diode. A voltage source (10), which may supply either alternating or direct current, energizes the array. Array stat... | 12/07/2010 |
| 7482758 | Magnetic low voltage dimmer The present invention provides a magnetic low voltage dimmer circuit that reduces DC magnetizing current which may be present in a dimmer system. The dimmer circuit delivers an RMS value of an AC supply voltage to a load while preventing or reducing a DC magnetizing... | 01/27/2009 |
| 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 |
| 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 |
| 7427838 | Light source controlling circuit and portable electronic apparatus A light source controlling circuit controls a light source outputting continuous light. The light source controlling circuit has a power supply circuit supplying an electric power to the light source, a light source monitoring circuit monitoring a state of the light... | 09/23/2008 |
| 7369060 | Distributed intelligence ballast system and extended lighting control protocol A ballast for use in a multi-ballast lighting system wherein the ballasts are coupled together by a digital communication network. The ballast comprises a power circuit portion for providing an electrical current to power a lamp. The ballast further includes a senso... | 05/06/2008 |
| 7362103 | System for driving a plurality of lamps and fault detecting circuit thereof A system for driving a plurality of lamps includes an inverter circuit (20) and a fault detecting circuit (30). The inverter circuit includes a plurality of outputs divided into a first output part and a second output part. The fault detecting circuit ... | 04/22/2008 |
| 7358682 | Discharge lamp lighting apparatus A discharge lamp lighting apparatus includes a transformer defining primary and secondary sides; a transformer driving circuit to drive the primary side of the transformer thereby lighting a discharge lamp connected at the secondary side of the transformer; a contro... | 04/15/2008 |
| 7333903 | Light management system having networked intelligent luminaire managers with enhanced diagnostics capabilities A network operation center for a light management system having networked intelligent luminaire managers. A plurality of networked luminaire managers, each collocated with a respective luminaire, monitor the status of their respective luminaires. The luminaire manag... | 02/19/2008 |
| 7323826 | Anti-cycling control system for luminaires An anti-cycling luminaire control system may detect repeated lamp-off conditions and interrupt power to the lamp and provide an indication of lamp cycling after a predetermined number of lamp-off conditions has been detected. The control system also provides a cool-... | 01/29/2008 |
| 7321206 | LED driving apparatus An apparatus for driving an LED is provided. The driving apparatus may have an LED unit including at least one LED, and a current controlling unit for controlling the magnitude of current flowing through the LED unit in response to a control signal. The LED driving ... | 01/22/2008 |
| 7315130 | Switching control for inverter startup and shutdown An electronic ballast circuit for a lamp is described, wherein the ballast comprises a power factor correction circuit coupled to an inverter circuit. The inverter circuit is further coupled to a trigger circuit, which is in turn operatively connected to a hot or ne... | 01/01/2008 |
| 7312965 | Aircraft applicable current imbalance detection and circuit interrupter and packaging thereof The aircraft applicable current imbalance detection and circuit interrupter interrupts an electrical circuit when a current imbalance is sensed. The current imbalance detection and circuit interrupter includes a housing, power supplies, a sensor for sensing a curren... | 12/25/2007 |
| 7279850 | Decoupling circuits Power taken inductively from the alternating current in a track is received by a resonant circuit which is output controlled by a switching circuit asynchronous with the frequency of the power supply. The switch on and off time is controlled to regulate the output p... | 10/09/2007 |
| 7262557 | Apparatus for illuminating footwear An apparatus for illuminating footwear includes a circuit combining a switch having a resilient spring and a light sensitive switch. ... | 08/28/2007 |
| 7247998 | Transient detection of end of lamp life condition apparatus and method A sensor system adapted to detect unwanted transients in the primary side of a luminous lamp load driving circuit and effect a change in operation of the driving circuit. A detection circuit is adapted to detect a transient, determine if it is an appropriate end-of-... | 07/24/2007 |
| 7242141 | Integrated fuses for OLED lighting device An embodiment of the present invention pertains to an electroluminescent lighting device for area illumination. The lighting device is fault tolerant due, in part, to the patterning of one or both of the electrodes into strips, and each of one or more of these strip... | 07/10/2007 |
| 7225345 | Employing sense resistor as safety fuse in limited power source applications A communication network utilizing Power Over Ethernet technology including Power Sourcing Equipment (PSE) that includes a multi-purpose device that operates as a current sensing resistor under normal electrical operating conditions and operates as a protection devic... | 05/29/2007 |
| 7207688 | Interactive shoe light device An interactive shoe light device includes at least one power source, at least one motion switch to generate an activation signal in response to an electrical engagement within the motion switch, the activation signal indicating at least duration of electrical engage... | 04/24/2007 |
| 7191510 | Electroluminescent (EL) lamp with current limiting fuse An electroluminescent (EL) lamp having at least two integral fusible links and a method of manufacturing such a lamp are disclosed. The present invention provides for a fusible link between the front electrode input power contact area and the transparent electrode. ... | 03/20/2007 |
| 7193372 | Electronic ballast with voltage converter having improved damping arrangement An electronic ballast for a lamp (16) having an input circuit (10) having a connection to a voltage supply, an output circuit (14) having a connection for the lamp (16), and a voltage converter apparatus (12), which is arranged bet... | 03/20/2007 |
| 7183721 | Ballast with circuit for detecting and eliminating an arc condition An apparatus for powering a lamp connected to a ballast circuit. A DC bus provides a DC voltage signal to an inverter. A control circuit selectively energizes the inverter to generate an AC signal for powering the lamp load via the rectifier circuit and an inverter ... | 02/27/2007 |
| 7164240 | Method and apparatus for driving an external electrode fluorescent lamp A technique for driving one or more EEFLs, having first and second ends, in a bank of EEFLs involves driving the EEFLs at both the first and second ends. In a non-limiting embodiment a device constructed according to the technique includes a bank of EEFLs connected ... | 01/16/2007 |
| 7154232 | Ballast control IC with multi-function feedback sense A multi-function feedback sense input in an electronic ballast control indicates a number of lamp faults on the basis of lamp parameters exceeding specified thresholds. An end of life detection is achieved by conditioning a lamp feedback with a DC offset to provide ... | 12/26/2006 |
| 7141933 | Systems and methods for a transformer configuration for driving multiple gas discharge tubes in parallel An apparatus and methods for balancing current in multiple negative impedance gas discharge lamp loads. Embodiments advantageously include balancing transformer configurations that are relatively cost-effective, reliable, efficient, and good performing. Embodiments ... | 11/28/2006 |
| 7123462 | Load control device A load control device having a power control element connected in series to a series circuit of a load and an alternating power supply and a snubber circuit comprises suppressing means for suppressing current flowing through the snubber circuit when the load is not ... | 10/17/2006 |
| 7120560 | Lamp monitoring and control system and method A system and method for remotely monitoring and/or controlling an apparatus and specifically for remotely monitoring and/or controlling street lamps. The lamp monitoring and control system comprises lamp monitoring and control units, each coupled to a respective lam... | 10/10/2006 |
| 7119494 | Circuit designs and control techniques for high frequency electronic ballasts for high intensity discharge lamps The present invention provides an electronic ballast for a high intensity discharge lamp such as a metal halide lamp. The ballast includes an inverter and a resonant circuit with an ignition capacitor between the resonant circuit and the lamp. The ignition capacitor... | 10/10/2006 |
| 7113893 | Lamp monitoring and control unit and method A unit and method for remotely monitoring and/or controlling an apparatus and specifically for remotely monitoring and/or controlling street lamps. The lamp monitoring and control unit comprises a processing and sensing unit for sensing at least one lamp parameter o... | 09/26/2006 |
| 7098097 | Mass-production packaging means and mass-production packaging method A mass-production packaging means suitable for mass-production packaging of an organic luminescent display. An organic electroluminescent display panel on which an organic luminescent device has been formed is first provided. Then, an UV laser is used to clean the s... | 08/29/2006 |
| 7091676 | Arc maintenance device for high density discharge lamps including an adaptive wave form monitor A supplemental arc maintenance electrical supply for a high density discharge (HID) lamp (L) for applying a high frequency supplemental arc voltage to maintain the arc during a period of unstable or intermittent AC supply in addition to or in lieu of the voltage or ... | 08/15/2006 |
| 7091675 | Driving apparatus for cold cathode fluorescent lamps A driving apparatus (2) for cold cathode fluorescent lamps (CCFLs) includes a primary and a secondary driving circuits (22, 21), a primary and a secondary light tubes (24, 23), a primary and a secondary feedback circuits (26, 27), and two... | 08/15/2006 |
| 7064496 | State detection device A state detection device is disclosed that is for detecting driving states of plural loads which are connected with each other in parallel and are driven by a driving unit. The state detection device includes a voltage detection unit for detecting voltages applied t... | 06/20/2006 |
| 7061183 | Zigzag topology for balancing current among paralleled gas discharge lamps An apparatus and methods for balancing current in multiple negative impedance gas discharge lamp loads. Embodiments advantageously include balancing transformer configurations that are relatively cost-effective, reliable, and efficient. Embodiments include configura... | 06/13/2006 |
| 7057354 | Frequency controlled lighting system A method and apparatus for illuminating lighting elements in one or more predetermined patterns. A preferred frequency controlled lighting system implementing this method includes a motion switch, a controller, a sound generator, and lighting elements. The motion sw... | 06/06/2006 |
