Patent ID: 8310170
Filing Date: 2012-11-13
Classification: H05B,Y02B

Abstract:
1. A circuit arrangement for controlling light emitting diodes (LED) ( 1 ) combined in groups ( 1 G), said circuit arrangement comprising a voltage source ( 3 ), at least one driver ( 2 ) which includes outputs ( 2 A) via which current can be supplied to the LED's ( 1 ), and a current control input ( 2 S) by means of which the current deliverable to the LED ( 1 ) is adjustable, the current control input ( 2 S) being connected to an output ( 3 A) of the voltage source ( 3 ), the voltage source ( 3 ) including a voltage control input by means of which the output voltage of the voltage source 3 is controllable and the voltage control input of the voltage source ( 3 ) being connected to an adjustable voltage divider ( 12 , 13 , 14 ) whose total voltage (V o ) is adjustable.