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| Number | Title | Issue Date |
| 8143793 | Device and method for periodic diode actuation An energy efficient illumination device is provided in which energy consumption is reduced by using a pulse generating circuit which provides power to LEDs in short pulses, and in which the circuit has a lifespan which is comparable to that of an LED. The illuminati... | 03/27/2012 |
| 8093820 | Fluorescent ballast with isolated system interface A ballasting circuit is configured with a circuit having a capability of providing an isolated power supply to various external ballast accessories that interface with a circuit or device for determining the amount of illumination. The ballasting circuit also has a ... | 01/10/2012 |
| 8035307 | AC to DC LED illumination devices, systems and methods Illumination devices (10), systems and methods that convert an alternating current (AC) supply (14) to a direct current (DC) for powering a plurality of light emitting diodes (LEDs) are disclosed. An illumination device (10) comprises a full wav... | 10/11/2011 |
| 7986101 | Variable effect light string A light system that is controllable to generate a plurality of selected lighting effects, the light system includes a main processor, the main processor being in communication with a plurality of light sources; and each of the plurality of light sources having a dis... | 07/26/2011 |
| 7969098 | Dimming circuit for discharging lamp capable of turning off under a low power condition A dimming circuit includes a resonant unit, a rectification unit, a half-bridge output unit, a first switch device and a second switch device, and a selection unit. The rectification unit is connected to the resonant unit. The half-bridge output unit includes a firs... | 06/28/2011 |
| 7956546 | Modular LED light bulb An LED-based lighting device and method for making the same are disclosed. The lighting device includes an LED light source mounted on a heat sink, a power adaptor, and a controller. The power adaptor is configured to be interchangeable with a conventional incandesc... | 06/07/2011 |
| 7679292 | LED lights with matched AC voltage using rectified circuitry An LED light string employs a plurality of LEDs wired in block series-parallel, where the one or more series blocks, each driven at the same input voltage or rectified AC input voltage as the source voltage (110 VAC or 220 VAC), are coupled in parallel. This voltage... | 03/16/2010 |
| 7609006 | LED light string with split bridge rectifier and thermistor fuse A string of lights has an electrical plug at one end and a receptacle at the other end and plural light-emitting diodes (LEDs) in series with a negative temperature coefficient (NTC) thermistor. The device also includes a bridge rectifier providing direct current to... | 10/27/2009 |
| 7545102 | Single-stage electronic ballast device A single-stage electronic ballast device outputs a square wave current to drive an HID lamp, which includes a rectifying and power factor correction unit, a bridge converter and a controller circuit. The rectifying and power factor correction unit has an input conne... | 06/09/2009 |
| 7518316 | Half-wave rectification circuit with a low-pass filter for LED light strings Disclosed is a low cost LED string circuit design that uses an inexpensive half-wave rectification and low-pass filter circuit that is designed to produce minimal flicker in the LED string that is connected to the circuit. The components of the half-wave rectificati... | 04/14/2009 |
| 7446482 | High pressure discharge lamp lighting apparatus A high pressure discharge lamp lighting apparatus comprises a high pressure discharge lamp including a discharge container made of quartz glass in which mercury and halogen is enclosed, and a first and second electrodes in which the first electrode is larger than th... | 11/04/2008 |
| 7407617 | Free radical polymerization method having reduced premature termination, apparatus for performing the method, and product formed thereby A method of polymerizing by a free radical polymerization mechanism, product formed thereby, and apparatus for performing this method, are disclosed. The composition to be polymerized by the free radical polymerization mechanism is irradiated by a substantially cons... | 08/05/2008 |
| 7408356 | Method of determining a zero point of a current sensor A method of determining a zero point of a current sensor in a circuit arrangement for operating a gas discharge lamp includes switching off the current through the sensor for a short period during a first half wave and determining a first test value. Then the curren... | 08/05/2008 |
| 7390115 | LED blinker load assembly An LED blinker load assembly (LBLA) (10) that can be integrated into the envelope of an LED light bulb or be attached externally to a rear, front or side LED lamp assembly. The LBLA (10) is comprised of an input circuit (12) and an output circui... | 06/24/2008 |
| 7364334 | Headlight for a motor vehicle giving a cutoff beam The object of the invention is a light, for a motor vehicle, giving a cutoff beam, in particular of the fog type, having an optical axis. The light having a light source having a filament, the overall shape of which is substantially cylindrical and the axis of which... | 04/29/2008 |
| 7358712 | Power supply control circuit and control method thereof A power supply control circuit includes: a conducting part configured to be controllable in its a conducting amount for conducting a power supply current to a load circuit; a current change ratio detecting part detecting a change rate of the power supply curr... | 04/15/2008 |
| 7358677 | Low-pressure mercury vapor discharge lamp having determined probability of failure Low-pressure mercury vapor discharge lamp has a discharge vessel (10) enclosing, in a gastight manner, a discharge space (13) provided with a filling of mercury and an inert gas in a gastight manner. The discharge vessel comprising electrodes (20 | 04/15/2008 |
| 7339790 | Halogen lamps with mains-to-low voltage drivers A halogen lamp includes a mains base and a converter operably connected to the mains base. The converter has a lamp socket, a toroid transformer, and a heat sink disposed within a center opening of the toroid transformer. A lamp is removably disposed in the lamp soc... | 03/04/2008 |
| 7336037 | Intelligent electrical switching device The present invention, according to a preferred embodiment, is directed to portable electronic devices which operate on exhaustible power sources, for example, batteries. The electronic devices of the present invention comprise at least one signal switch and a micro... | 02/26/2008 |
| 7334915 | Searchlight grip A multi-position switched grip for a searchlight includes a two-ended hand-grip. Each end has a thumb-operable pushbutton switch. A person holds the grip between palm and fingers with thumb on one or the other switch. One end has a hinge to which are connected an el... | 02/26/2008 |
| 7311417 | Waterproof flashlight including electronic power switch actuated by a mechanical switch A flashlight has front and rear interconnected housing portions which define an interior waterproof chamber. The waterproof chamber carries an illumination source, an electronic drive for the illumination source and a power source. A switch system includes an electr... | 12/25/2007 |
| 7312582 | Electronic ballast An electronic ballast for driving at least one lamp comprising a rectifying circuit operatively connectable to an AC line; a current drawing circuit connected across said rectifying circuit; and an inverter circuit connected to said rectifying circuit that supplies ... | 12/25/2007 |
| 7291988 | Electronic high intensity discharge lamp driver A high intensity discharge (HID) driver for a HID lamp which can be used as a HID ballast is provided. The HID driver at least includes an input processor connected to an input power for suppressing a transient and in in-rush current of the input power, a main drive... | 11/06/2007 |
| 7280375 | Circuit arrangement for operating at least one light-emitting diode A circuit arrangement is for operating at least one light-emitting diode LED in an electrical circuit at a service voltage greater than the forward voltage of the at least one light-emitting diode. The light-emitting diode is PWM-controlled. The circuit includes rea... | 10/09/2007 |
| 7276858 | Decorative lighting string with stacked rectification An improved decorative light string circuit comprises full bridge rectification located in or downstream of the front plug, wherein the rectification circuit contains one or more voltage reducing and/or filtering elements in order to reduce or limit LED drive curren... | 10/02/2007 |
| 7265503 | Applications of halogen convertor control IC The functionality of electronic convertors for low voltage filament lamp applications, such as halogen lamps, can be increased by including auxiliary circuits. Such auxiliary circuits may include gate drive resistors; a charge pump for sustaining the DC supply; open... | 09/04/2007 |
| 7265502 | Dimming apparatus of light emitting unit The present invention discloses a dimming apparatus of a light emitting unit that uses a sensor to detect an external signal such as sound, shadow, temperature or digital image for changing the light emitting conditions such as brightness, color, frequency or blinki... | 09/04/2007 |
| 7256556 | Equipment and methods for emergency lighting that provides brownout detection and protection The present invention relates to systems, equipment and methods that provide emergency lighting and allow the detection of brownout conditions. One aspect of the present invention is an emergency lighting system with an input voltage interface for receiving an input... | 08/14/2007 |
| 7234833 | Work light A work light having one or more light emitting diodes (LEDs) to provide a high intensity beam pattern. In one arrangement two LEDs are tilted away from each and in another arrangement one LED is used together with a shaped reflector to provide an elliptical beam. | 06/26/2007 |
| 7231060 | Systems and methods of generating control signals Separating a source in a stereo signal having a left channel and a right channel includes transforming the signal into a short-time transform domain; computing a short-time similarity measure between the left channel and the right channel; classifying portions of th... | 06/12/2007 |
| 7227314 | Voltage equalization method and apparatus for low-voltage lighting systems A method and apparatus to equalize the voltage across each light bulb in a low-voltage lighting system, commonly found in the yards of private homes and businesses. The present invention consists of a power compensation element that is inserted in-line with each lig... | 06/05/2007 |
| 7221100 | Gas discharge lamp power supply An apparatus for providing power to a gas discharge lamp comprises a storage capacitor and an ignition switch coupled through a primarily parasitic first inductor to a parallel combination of a diode assembly and a second inductor in series with a gas discharge lamp... | 05/22/2007 |
| 7220016 | Flashlight with selectable output level switching A flashlight has a lamp, a power source, two switches, and a controller connected to the switches. The first switch controls delivery of power to the lamp, and the second switch selects a dimmed brightness level. The first switch may invoke the dimmed level, or a ma... | 05/22/2007 |
| 7207689 | Touch activated purse illumination assembly A touch-activated purse illumination assembly having a base unit housing a circuit assembly, a power source and at least one elongated light emitting portion. Touch sensitive switching means are included in the circuit assembly, and feature a pair of partially expos... | 04/24/2007 |
| 7199532 | Lamp containing phase-control power controller with analog RMS load voltage regulation A lamp includes a phase-control power controller within the lamp. The phase-control power controller includes an analog load voltage sensor that provides an optical output related to an RMS load voltage and a phase-controlled dimming circuit that has a comparison ci... | 04/03/2007 |
| 7196478 | Circuit arrangement A driver for driving a gas discharge lamp includes an inductive ballast implemented as auto-transformer having a central tap, connected between one output terminal and a first input terminal, and a triac connected between a second output terminal and a second input ... | 03/27/2007 |
| 7185999 | Flashlight with touch sensing on/off operation A flashlight senses when it is picked up, and then automatically turns on. When the flashlight is released or set back down, it automatically turns off. Touch or contact sensors sense the touch of a human hand, causing a circuit in the flashlight to switch on a ligh... | 03/06/2007 |
| 7186002 | Flashlight with selectable output level switching A flashlight having a lamp, a power storage element, a switch, and an electronic controller. The controller has a switch input connected to the switch and operates in response to the input to deliver power from the power storage element to the lamp. The controller m... | 03/06/2007 |
| 7180248 | Inductively coupled ballast circuit A ballast circuit is disclosed for inductively providing power to a load. The ballast circuit includes an oscillator, a driver, a switching circuit, a resonant tank circuit and a current sensing circuit. The current sensing circuit provides a current feedback signal... | 02/20/2007 |
| 7170231 | Lamp that sets desired RMS load voltage with variable pulse width modulation A lamp includes a voltage controller that converts a line voltage to a desired RMS load voltage. The voltage controller is entirely within a lamp base and uses pulse width modulation to define the RMS load voltage. The voltage controller has a feed-back circuit that... | 01/30/2007 |
