Method and circuit apparatus for detecting a failure of at least one light emitting diode in a light emitting diode arrangement

• Main Author: KOVATCHEV EMIL
• Format: Patent
• Language: Chinese; English
• Published: 18.07.2017
• Subjects: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

A method for detecting a failure of at least one light emitting diode in a light emitting diode arrangement to which a supply current is applied by a constant-current source via a supply terminal and in which a respective luminous state of the light emitting diodes is set individually or in groups by means of a respective switching element by respective short-circuiting is disclosed, wherein a voltage signal of a chain voltage dropped across the light emitting diodes and dependent on the respective switching state of the switching elements is tapped off by a circuit apparatus at the supply terminal. The voltage signal is fed to an analog maximum value detector of the circuit apparatus, the maximum value detector is operated for a predetermined measurement duration and a maximum value signal of the voltage signal is provided at an output of the maximum value detector after the measurement duration. 本发明涉及种用于探测在发光二极管设备（2）中的至少个发光二极管（3）的失灵的方法，利用恒流源（6）经由供电接头（7）给所述发光二极管设备施加供电电流（I），并针对该发光二极管设备，借助相应的开关部件（4）通过相应的短路（31）