LED light unit and method of operating an LED light
First Claim
1. A LED light unit, in particular for a passenger transport vehicle, such as an aircraft, a road vehicle, a ship or a rail car, the LED light unit having at least one LED and being configured to be used with a high intensity discharge lamp power supply that is adapted to monitor its output behavior, wherein 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,a power dissipating element switchably coupled to the power input for dissipating electrical energy from the high intensity discharge lamp power supply, anda control circuit coupled to the power input, wherein the control circuit is configured to sense an electric behavior at the power input, deducing the kind of driving power supplied by the high intensity discharge lamp power supply, and is further configured to selectively couple the capacitor to the power input and to selectively couple the power dissipating element to the power input as a response to the electric behavior at the power input in such a way that the LED light unit emulates an electric behavior of a high intensity discharge lamp.
1 Assignment
0 Petitions
Accused Products
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.
11 Citations
14 Claims
-
1. A LED light unit, in particular for a passenger transport vehicle, such as an aircraft, a road vehicle, a ship or a rail car, the LED light unit having at least one LED and being configured to be used with a high intensity discharge lamp power supply that is adapted to monitor its output behavior, wherein 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, a power dissipating element switchably coupled to the power input for dissipating electrical energy from the high intensity discharge lamp power supply, and a control circuit coupled to the power input, wherein the control circuit is configured to sense an electric behavior at the power input, deducing the kind of driving power supplied by the high intensity discharge lamp power supply, and is further configured to selectively couple the capacitor to the power input and to selectively couple the power dissipating element to the power input as a response to the electric behavior at the power input in such a way that the LED light unit emulates an electric behavior of a high intensity discharge lamp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A Method of operating an LED light unit having at least one LED, in particular in a passenger transport vehicle, such as an aircraft, a road vehicle, a ship or a rail car, wherein a power input of the LED light unit is coupled to a high intensity discharge lamp power supply adapted to monitor its output behavior, the method comprising the steps of:
-
(a) coupling a capacitor to the power input for absorbing electrical energy from the high intensity discharge lamp power supply in a charging phase, (b) coupling a power dissipating element to the power input for dissipating electrical energy from the high intensity discharge lamp power supply in a voltage conditioning phase, (c) de-coupling the power dissipating element from the power input in a nominal operation mode, and (d) sensing an electric behavior at the power input, deducing the kind of driving power supplied by the high intensity discharge lamp power supply and carrying out steps (a), (b) and as a response to the electric behavior at the power input in such a way that the LED light unit emulates an electric behavior of a high intensity discharge lamp. - View Dependent Claims (13, 14)
-
Specification