Patent application number | Description | Published |
20080303402 | Ignition aid and fitting shroud for discharge lamp - An ignition aid ( | 12-11-2008 |
20090200954 | COLOR CONTROL OF A DISCHARGE LAMP DURING DIMMING - A ballast circuit is suitable for driving a high intensity discharge lamp in at least two power modes including a nominal power mode for driving the high intensity discharge lamp at a nominal power and a reduced power dimming mode for driving the lamp at less than the nominal power. The lamp ballast circuit generates a first alternating current waveform during the nominal power mode and generates a background alternating current waveform in the reduced power mode which is perturbed at intervals by a high intensity pulse which helps to reduce the change in correlated color temperature which would otherwise occur in the dimming mode. | 08-13-2009 |
20100001628 | IGNITER INTEGRATED LAMP SOCKET 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 |
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 |
20100019642 | GAS-FILLED SHROUD TO PROVIDE COOLER ARCTUBE - A lamp is provided having an arctube having a light-transmitting envelope. The arctube is surrounded by a gaseous medium confined by a containment envelope such as a hermetic shroud. The gaseous medium is preferably He or H | 01-28-2010 |
20100109503 | METHOD AND APPARATUS FOR POSITIONING A CERAMIC INDUCTION DISCHARGE BODY RELATIVE TO AN INDUCTION COIL - An electrodeless or induction ceramic HID lamp includes a ceramic arc body having a generally spheroidal portion enclosing a discharge chamber and an induction coil received around a perimeter portion of the spheroidal portion. At least one leg extends from the spheroidal portion of the arc body. A mounting structure connects the arc body to the surrounding lamp assembly. In one arrangement, a mounting tube is received over at least a portion of the leg, and may further include a light transmissive shroud that also abuts with the induction coil to precisely locate the arc body relative to the coil. In another arrangement, first and second mounting members extend from spaced locations of the arc body, either as pins or legs extending from the spheroidal portion, or radially extending legs from an equatorial portion of the arc body. In still another arrangement, a ceramic mounting member extends from the arc body and includes a thin peripheral rim having spaced ridges to engage spaced locations of the induction coil. | 05-06-2010 |
20100109504 | STARTING COIL FOR INDUCTION LIGHTING - Life of a starting conductor or coil in an induction lamp is significantly improved with the present disclosure. A mechanical support supports the starting coil adjacent the arc body of the lamp and has features that allow the starting coil to mount thereon. The mechanical support may be made of a high temperature material such as glass, quartz, or ceramic so that light from the lamp is not blocked. In another embodiment, the starting conductor is protected from oxidation by fully encasing the starting conductor within the high temperature material. In still another embodiment, a thin coating of a high temperature material that may or may not be light transmissive could be used as an alternative manner of support. | 05-06-2010 |
20100109831 | INDUCTION COIL WITHOUT A WELD - A multi-turn coil formed from a single sheet of conductive material and the method of forming same eliminates the use of a weld. The multi-turn coil includes a single sheet of conductive material having at least a first turn in a first plane, and at least a second turn in a second plane, where the first plane is parallel to the second plane. An interconnecting fold interconnects the first and second turns, and any additional turns. The method of forming a multiple turn coil includes providing a continuous strip of conductive material having at least first and second turns extending through substantially 360° and formed in a first plane. The method further includes displacing at least the first turn from the first plane into generally overlapping, parallel relation with the second turn. | 05-06-2010 |
20100117509 | HID LIGHTING ASSEMBLY CAPABLE OF INSTANT ON/OFF CYCLE OPERATION - A high intensity discharge lighting assembly capable of instant ON/OFF operation with a lamp housing having therein an HID lamp, an instant ON igniter circuit and lamp driver circuitry. The housing may have a screw in base or may be configured for fixed mounting on an open receptacle box. In one version, a non-replaceable HID lamp has leads permanently connected to the instant ON circuitry. In another version, the HID lamp has an integral base with pins which are plugged in to a socket provided in the housing. | 05-13-2010 |
20100141168 | CLASS-E AMPLIFIER AND LIGHTING BALLAST USING THE AMPLIFIER - An amplifier comprises a power source, a load network comprising a load and a resonance circuit, an input branch having a first end electrically coupled to the power source and a second end electrically coupled to the load network, and an active switch having one terminal electrically coupled to the second end of the input branch. The input branch including at least one parallel-LC-circuit configured to provide an infinitely large impedance at harmonics of a determined order. | 06-10-2010 |
20110043108 | SEAL AND LEG DESIGN FOR CERAMIC INDUCTION LAMP - A ceramic arc body includes a main body having a chamber. A leg extends from the main body and has an internal opening therethrough that communicates with the chamber. An electrically non-conductive seal member is received in the leg opening. A tapered internal surface abuttingly engages the seal member and provides for centering of the seal member relative to the leg. A separate tapering region, shoulder, or stop surface limits insertion of the seal member into the leg opening for precision location of the seal member, and in another embodiment, a single continuous taper inside the leg cooperates with a tapered seal member for both centering and precision insertion of the seal member into the leg. In another embodiment, a hybrid electrode is employed where one portion of the hybrid electrode is electrically non-conductive and a second portion of the electrode is electrically conductive. The hybrid electrode mechanically supports both the lamp and the starting coil and also provides electrical connection to the starting coil. | 02-24-2011 |