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METROLIGHT LTD.
| METROLIGHT LTD. Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20090218959 | FUEL CONFIGURE BALLAST - A method for employing an electronic ballast. A distributor is provided with the electronic ballast. An operative parameter of the electronic ballast is configurable to operate a type of gas discharge lamp. The distributor is further provided with a configuration mechanism for configuring said electronic ballast. The electronic ballast is attached to the configuration mechanism, the configuration mechanism is attached to a client computer and the client computer is operatively attached to a configuration service, typically over a wide area network, e.g. Internet. The distributor, using the client computer, requests from the configuration server to configure the ballast. The configuration is performed using the configuration mechanism by transmitting instructions from the configuration server to the client computer in response to the request. | 09-03-2009 |
| 20090033238 | IGNITION AND OPERATION OF ELECTRONIC HIGH INTENSITY DISCHARGE LAMPS - A method for igniting and operating a high intensity discharge (HID) lamp using an electronic ballast controlled by a ballast microcontroller. An ignition circuit including a parallel capacitive circuit is connected in parallel to the HID lamp. The ignition circuit being resonant at an ignition resonance frequency. An ignition voltage is provided to the HID lamp at the ignition resonance frequency, thereby initiating ignition of the HID lamp. Upon sensing the ignition, the HID lamp is powered at an operation frequency. Both the ignition resonance frequency and the operation frequency are in a high frequency range above fifty kilohertz. The ignition voltage preferably does not include a significant direct current offset The current flowing through the HID lamp is substantially continuous during the transition from providing ignition voltage during the ignition to powering the HID lamp at the operation frequency. | 02-05-2009 |