Circuit arrangement for adapting the characteristics of a light-emitting diode arrangement, light-emitting diode signal lamp and light signal arrangement and their use

摘要

The arrangement has at least one series circuit in parallel with the LED arrangement and containing a load resistance and a controllable switch element. The switch element is coupled to an evaluation device that detects the LED arrangement operating voltage and drives the switch element so a load current flows in the load resistance and the sum of the load and LED currents lies on a current-voltage characteristic determined by external elements. The arrangement has at least one series circuit (3) in parallel with the LED arrangement (2) and containing a load resistance (RL) and a controllable switching element (T) whose electrical resistance in the on state can be controlled via a control input. The switch element is coupled to an evaluation device (4) that detects the operating voltage (UB) of the LED arrangement and drives the switch element accordingly so that a load current flows in the load resistance and the sum of the load current and LED current gives a current value on a current-voltage characteristic determined by external elements, especially monitoring devices. Independent claims are also included for the following: a LED signaling lamp, a light signal arrangement and a method of adapting the current flow through a LED signaling lamp to a defined characteristic.