LED LIGHT UNIT AND METHOD OF OPERATING AN LED LIGHT UNIT

• US 20140333221A1
• Filed: 04/25/2014
• Published: 11/13/2014
• Est. Priority Date: 05/10/2013
• Status: Active Grant

• Current Assignee: Goodrich Lighting Systems GmbH (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Goodrich Lighting Systems GmbH (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Trinschek, Robert, Hessling von Heimendahl, Andre, Roebke, Steffen
• Granted Patent: US 9,295,114 B2
• Time in Patent Office: Days
• US Class Current: 315/200.R
• CPC Class Codes: H05B 41/00 Circuit arrangements or apparatus for igniting or operating discharge lamps structurally associated with the discharge lamps H01J61/54, H01J61/56
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/3578 Emulating the electrical or functional characteristics of discharge lamps
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
• CPC Class Codes: Y10T 29/49817 with other than ancillary treating or assembling

Abstract

An LED light unit, in particular for a passenger transport vehicle, such as an aircraft, a road vehicle, a ship or a rail car, is disclosed that has at least one LED and is configured to be used with a high intensity discharge lamp power supply that is adapted to monitor its output behavior. The LED light unit comprises a power input coupleable to the high intensity discharge lamp power supply, a capacitor switchably coupled to the power input for absorbing electrical energy from the high intensity discharge lamp power supply, and a power dissipating element switchably coupled to the power input for dissipating electrical energy from the high intensity discharge lamp power supply.

Claims

14-1. A Method of replacing a high intensity discharge lamp, in particular of a passenger transport vehicle, such as an aircraft, a road vehicle, a ship or a rail car, with an LED light unit according to claim 1, the method comprising the steps of:

(a) disconnecting the high intensity discharge lamp from the high intensity discharge lamp power supply, and

(b) connecting the LED light unit according to the high intensity discharge lamp power supply.