Class / Patent application number | Description | Number of patent applications / Date published |
315289000 | SURGE GENERATOR OR INDUCTANCE IN THE SUPPLY CIRCUIT | 11 |
20080252232 | Magnetic Ballast Fault Isolation System and Method - A magnetic ballast fault isolation system and method, with a fault isolation system including a magnetic ballast | 10-16-2008 |
20090153070 | High-Pressure Discharge Lamp with an Improved Starting Capability, as Well as a high-voltage pulse generator - A spiral pulse generator is used to start a high-pressure discharge lamp and is accommodated directly in the external bulb of the lamp. The spiral pulse generator comprises two parts which are manufactured jointly as an LTCC component. | 06-18-2009 |
20100001656 | LOW IGNITION VOLTAGE INSTANT START FOR HOT RE-STRIKE OF HIGH INTENSITY DISCHARGE LAMP - A lamp assembly includes a housing that selectively receives a removable, plug-in high intensity discharge (HID) lamp. A transformer and electrical circuit are received in the housing for providing an instant start, hot re-strike ignition of the lamp at less than 25 kilovolts. A circuit for an instant start, hot re-strike of an HID lamp supplies an ignition voltage to the HID lamp that includes pulses having an amplitude of less than 25 kilovolts and a frequency ranging from approximately 20 hertz to approximately 500 hertz. Preferably, the frequency is greater than 100 hertz, more preferably the frequency is approximately 150 hertz. The amplitude of pulses are preferably less than approximately 15 kilovolts, and more preferably approximately 8-10 kilovolts. The pulse width is approximately 200 nanoseconds and the peaks of the pulses are periodic with a period of approximately 2 milliseconds. | 01-07-2010 |
20120319615 | LED DRIVER CIRCUIT AND METHOD OF DRIVING LED - A light emitting diode (LED) driver circuit is provided. The LED driver circuit includes an LED the LED; a power unit which provides a current to the LED through an inductor; a dimming switch which is connected to the LED and bypasses the current provided to the LED; an input unit which receives brightness information of the LED; a logic unit which calculates reference currents for each driving mode according to the received brightness information; a current control unit which controls the power unit to provide the current based on the driving mode and the calculated reference currents to the inductor; and a switch control unit which switches the dimming switch on if the driving mode of the LED driver circuit is switched to the dimming mode. | 12-20-2012 |
20130187564 | TRANSFORMER VOLTAGE DETECTION IN DIMMABLE LIGHTING SYSTEMS - An illumination system detects a peak value of a voltage of a transformer supplying an LED module by analyzing the current value of the voltage and an on-time of the voltage. Based on the detected peak value, a property of the illumination system is adjusted. | 07-25-2013 |
20130193870 | Digitally Controlled Current Regulator for High Power Solid State Lighting - A representative apparatus embodiment provides for controlling current supplied to solid state lighting, such as light emitting diodes. A representative apparatus comprises a memory adapted to store a plurality of current parameters, and a control circuit adapted to modulate an energizing cycle time period for providing a substantially constant DC average current to the solid state lighting in response to a selected current parameter from the plurality of current parameters. In a representative embodiment, the control circuit modulates a current provided to the solid state lighting in response to a predetermined minimum current level (I | 08-01-2013 |
20130264964 | LED DRIVER CIRCUITS WITH CURRENT ENVELOPE CONTROL - A light emitting diode (LED) driver circuit controls switching of an output transistor. The LED driver circuit monitors inductor current flowing through an output inductor that is coupled to one or more LEDs. In response to detecting that the inductor current has reached a peak value, the LED driver circuit switches OFF the output transistor. The LED driver circuit switches ON the output transistor in response to detecting zero crossing of the inductor current. The LED driver circuit may detect zero crossing of the inductor current from a gate voltage of the output transistor by detecting for a negative spike. | 10-10-2013 |
20140265912 | COIL COMPONENT AND ELECTRONIC DEVICE HAVING THE SAME - There is provided a coil component capable of minimizing mutual interference while disposing a plurality of coil parts in a single component. According to an embodiment of the present invention, the coil component includes: a bobbin part including two body parts disposed in parallel, the two body parts having coils wound therearound; and a core including two inner legs inserted into the body parts and two outer legs disposed outwardly of the body parts, the inner legs and the outer legs having the same cross sectional area. | 09-18-2014 |
20160105121 | Module Having Measurement Signal Feedback Via A Galvanically Isolated Converter - The invention relates to a module for operating at least one illuminant, preferably at least one LED, said module having at least one electrically insulating barrier, which separates a primary side that can be supplied, originating from a mains voltage, from a secondary side of the module, from which the at least one illuminant can preferably be supplied. A secondary-side passive circuit is provided, which is connected in a supply path to a primary-side control circuit across the barrier via a galvanically isolated converter. The primary-side control circuit is designed to apply a test signal with predetermined temporal development to the secondary-side passive circuit (via the converter) and simultaneously to monitor a measurement signal generated thereby on the secondary side and fed back into the supply path, more particularly to monitor an increase of current in the converter. | 04-14-2016 |
315290000 | Circuit interrupter in the inductance circuit | 2 |
20110089853 | ELECTRONIC DRIVER APPARATUS FOR LARGE AREA SOLID-STATE LEDS - An electronic driver apparatus is provided for driving power an organic LED, including a switchable inductance circuit and a controller to connect an inductance between a power source and the OLED during a startup period as power is first applied to the OLED. | 04-21-2011 |
20160081152 | GENERATING A VOLTAGE FEEDBACK SIGNAL IN NON-ISOLATED LED DRIVERS - An LED lamp comprises one or more LEDs, an inductive element coupled to an input voltage source and the one or more LEDs, and a switch coupled to the inductive element. A first current detector is coupled between the input voltage source and a ground node of the LED lamp, such that a current detected by the first current detector is proportional to a bulk voltage across the input voltage source. A second current detector is coupled between the inductive element and the ground node, such that current detected by the second current detector is proportional to a drain voltage across the switch. A switch controller controls the switch based on a feedback signal indicative of a voltage across the inductive element, which is generated based on a difference between the current detected by the second current detector and the current detected by the first current detector. | 03-17-2016 |