| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 315114000 | Electric heater for the load devices | 11 |
| 20120019145 | LED LIGHT EMITTING DEVICE - An LED light emitting device includes an LED light emitting component comprising a visible LED die emitting visible light and an infrared LED die emitting infrared light, a power source driver for providing electric energy for the LED light emitting component, and a temperature sensor for sensing a surface temperature of an outer surface of the LED light emitting component. When a value of the surface temperature is smaller than zero degree Celsius, the temperature sensor outputs a control signal to the power source driver to control the power source driver to supply an electric current to the infrared LED die, whereby the infrared LED die radiates infrared light to melt ice on the outer surface of the LED light emitting component. | 01-26-2012 |
| 20130057154 | Light Dimmer For Fluorescent Lamps And Methods For Use Thereof - A device to control luminosity of a lamp supported by a rapid start ballast, the device including a first terminal and a second terminal configured to be connected in series with the rapid start ballast and the lamp, a current divisor array, in communication with the first terminal and the second terminal, with a plurality of inductors and a commutable element, the commutable element selecting between two current paths employing the plurality of inductors, the commutable element when in a first state selecting a first one of the current paths to provide a higher luminosity setting and when a second state selecting a second one of the current paths to provide a lower luminosity setting, and a transformer in communication with the first terminal and the second terminal configured to provide heating to an electrode of the lamp. | 03-07-2013 |
| 20130200798 | Fluorescent Lamp Dimmer - A fluorescent lamp dimmer is disclosed herein, which may dimmably power one or more fluorescent lamps. The fluorescent lamp dimmer includes a fluorescent lamp power output, at least one fluorescent lamp heater output, a dimmable current source operable to yield a controllable constant current, a current-fed inverter operable to power the fluorescent lamp output from the controllable constant current, and a heater circuit operable to power the at least one fluorescent lamp heater output. The heater circuit provides power at a substantially constant level while the controllable constant current is variable. | 08-08-2013 |
| 20130249405 | DIMMABLE LIGHT EMITTING DIODE LIGHTING SYSTEM - An LED lighting system including a first group of LEDs, a second group of LEDs, and a controller. The first group of LEDs and the second group of LEDs are configured to be independently driven by a first LED drive signal and a second LED drive signal, respectively. The controller is configured receive a dimming signal from a dimmer having a preheat function. The controller is also configured to compensate the dimming signal for the preheat function of the dimmer to generate a compensated dimming signal, generate the first LED drive signal based on the compensated dimming, and generate the second LED drive signal based on the compensated dimming signal. The first LED drive signal is then transmitted the first group of LEDs and the second LED drive signal is transmitted to the second group of LEDs. | 09-26-2013 |
| 20140103810 | LED ENGINE AND CONTROL SYSTEM - A lighting system having a controller, a plurality of lights, and a bidirectional bus interconnecting the controller with the lights. The controller controls of the status of the various lights including the on/off state and intensity of the light by transmitting not only commands along the bidirectional bus, but also the address of the individual lights along the bus to the lights. This address is decoded by a circuit associated with each light to permit the lights to be individually controlled if desired. | 04-17-2014 |
| 20140184075 | OUTDOOR LED LAMP WITH HEATED COVER - An outdoor LED lamp assembly includes a light transmissive cover disposed over at least one LED chip of the lamp assembly. A heating element is provided for providing heat to the cover. A sensor may be used to detect cover conditions, such as the accumulation of condensation, ice or snow on the cover, so as to provide electricity to the heating element and heat the cover in order to remove the condensation, ice or snow on the cover. | 07-03-2014 |
| 20140197736 | FILAMENT DETECTION CIRCUIT - A ballast including a driver circuit, a filament heating circuit, a current detector circuit, and a control circuit is provided. The driver circuit generates an oscillating current signal. The filament heating circuit heats filaments of a lamp connected to the ballast and includes a heating transformer with primary and secondary windings and a switching circuit. The primary winding is connected to the driver circuit and the switching circuit. The secondary winding is connected to the primary winding and may be connected to the lamp. The duty cycle of the switching circuit controls current provided from the driver circuit to the primary winding to heat the lamp. The current detector circuit is connected to the switching circuit and detects a parameter of the current in the primary winding, which indicates the number of lamp filaments connected to the ballast. The control circuit controls the driver circuit based on the detected parameter. | 07-17-2014 |
| 20140239814 | LIGHT-EMITTING DIODE LAMP COMPATIBLE WITH AN ELECTRONIC BALLAST GENERATING PREHEATING CURRENT - An LED lamp has two preheating current control units respectively connected to a first electrode terminal and a second electrode terminal of the LED lamp, two lamp-side rectification circuits, and an LED light string. Each preheating current control unit has a ballast-side rectification circuit connected to one of the first and second electrode terminals and a load-varying circuit having a resistive load and a control circuit. The resistive load is serially connected to a DC output terminal of the ballast-side rectification circuit through the control circuit. The control circuit adjusts a resistance of the resistive load. Two input terminals of each lamp-side rectification circuit are respectively connected to one of the electrodes of each of the first electrode terminal and the second electrode terminal. The LED light string has two ends respectively connected to the two output terminals of each lamp-side rectification circuit, and has multiple series-connected LED elements. | 08-28-2014 |
| 20140375210 | DIMMABLE LIGHT EMITTING DIODE LIGHTING SYSTEM - An LED lighting system including a first group of LEDs, a second group of LEDs, and a controller. The first group of LEDs and the second group of LEDs are configured to be independently driven by a first LED drive signal and a second LED drive signal, respectively. The controller is configured receive a dimming signal from a dimmer having a preheat function. The controller is also configured to compensate the dimming signal for the preheat function of the dimmer to generate a compensated dimming signal, generate the first LED drive signal based on the compensated dimming, and generate the second LED drive signal based on the compensated dimming signal. The first LED drive signal is then transmitted the first group of LEDs and the second LED drive signal is transmitted to the second group of LEDs. | 12-25-2014 |
| 20150296592 | SYSTEMS AND METHODS FOR HEATER CONTROL BY CURRENT LEVEL STEP DETECTION - An airfield lighting system can comprise a control system, a constant current regulator, and a plurality of light fixtures. The control system can command the constant current regulator to output a current level transition sequence. One or more light fixtures of the plurality of light fixtures can detect the current level transition sequence and execute a command at the light fixture, such as actuating a heating element or adjusting the intensity of light emitted by a light source. | 10-15-2015 |
| 20160174322 | LIGHTING DEVICE AND METHOD FOR OPERATING A LIGHTING DEVICE | 06-16-2016 |
