DIMMABLE LED READING LIGHT UNIT, ARRANGEMENT OF POWER SUPPLY AND DIMMABLE LED READING LIGHT UNIT AND METHOD OF REPLACING A DIMMABLE LIGHT UNIT BY A DIMMABLE LED READING LIGHT UNIT

摘要

A dimmable LED reading light unit includes comprises a dimming module and an LED module, connected in series. The dimming module has an input being connectable to a power supply supplying direct voltage and includes a potentiometer allowing section of a dimming rate and a current controller providing an operating current for the LED module. The LED module includes at least one LED and a current consumer connected in parallel and the current controller is configured to supply direct current to the LED module that substantially corresponds to the sum of the driving current necessary for driving the at least one LED to emit light with an intensity of illumination corresponding to the dimming rate of the potentiometer, and the current consumption of the current consumer.

主权项

1. A dimmable LED reading light unit, in particular for a passenger transportation vehicle, such as an airplane, a bus, a ship or a railcar, comprising:
a dimming module and an LED module, connected in series; and the dimming module having an input being connectable to a power supply supplying direct voltage, the dimming module comprising a potentiometer allowing to select a dimming rate and a current controller providing an operating current for the LED module, the operating current corresponding to the dimming rate of the potentiometer; the LED module comprising at least one LED and a current consumer connected in parallel; wherein the current controller is configured to supply direct current to the LED module that substantially corresponds to the sum of the driving current necessary for driving the at least one LED to emit light with an intensity of illumination corresponding to the dimming rate of the potentiometer, and the current consumption of the current consumer.