Apparatus and method for operating a light generator

摘要

An apparatus and method for operating a light generator (2) with a voltage source (4) makes possible a simple and reliable determination of the light generator's condition. The apparatus provides (a) a device (5; 13) for generating a measurement voltage the voltage present at ale light generator (2), (b) device (6, 9) for generating a first and a second comparison voltage, each proportional to the current flowing through the light generator (2), (c) a device (9, 8) for forming a difference voltage from the measurement voltage and one comparison voltage and a summation voltage from the measurement voltage and the other comparison voltage, (d) two capacitive rectifiers (7) for rectifying the difference voltage and the summation voltage, and (e) a controller (3), by which the rectified difference voltage and the rectified summation voltage can be evaluated.

主权项

1. A device for operating a light generator with a voltage source comprising, in combination:
(a) a device for generating a measurement voltage that is proportional to the voltage applied to the light generator, (b) a device for generating a first and a second reference voltage that are each proportional to the current flowing through the light generator, (c) a device for forming a differential voltage from the measurement voltage and the one reference voltage and a sum voltage from the measurement voltage and the other reference voltage, (d) two rectifiers for rectifying the differential voltage and the sum voltage, and (e) a control for evaluating the rectified differential voltage and the rectified sum voltage.