Patent ID: 9295120
Filing Date: 2016-03-22
CPC Classification: H05B,Y02B

Claim Text:
1. An LED lighting apparatus comprising a control module having a push-pull circuit for generating a pulse-width-modulated (PWM) signal, an LED lighting module which is connected to the control module via a signal transmission path, which comprises two lines and is intended to transmit the PWM signal to a signal converter accommodated in the LED lighting module, and to a current source, the brightness of at least one LED being controlled using the signal converter on the basis of the PWM signal received thereby, the LED lighting module also containing a device for generating a detector current having a predefined level, and a measuring circuit for measuring the instantaneous level of the detector current being connected in the control module in such a manner that, during the switched-off times of the PWM signal, the measuring circuit is connected to the LED lighting module via the signal transmission path such that the instantaneous level of the detector current can be measured using the measuring circuit and a functional state of the LED lighting module can be determined therefrom.