US Patent No. 10,143,049

ELECTRONIC OPERATING DEVICE FOR LIGHT SOURCES


Patent No. 10,143,049
Issue Date November 27, 2018
Title Electronic Operating Device For Light Sources
Inventorship Ralf Berchtold, Munich (DE)
Maximilian Schmidl, Pullach (DE)
Assignee OSRAM GMBH, Munich (DE)

Claim of US Patent No. 10,143,049

1. An electronic operating device for light sources, comprising:an input part for inputting an input voltage;
an output part for outputting an output voltage and an output current for the light sources;
wherein the electronic operating device is configured
to operate the output part as a voltage source for a period of time after the input voltage has been applied;
subsequently to operate the output part as a current source after this period of time;
to measure the output voltage and to identify a point of discontinuity in a time profile of the output voltage; and
to prescribe the output voltage at the point of discontinuity as a setpoint voltage for a control loop, which regulates the output voltage and the output current during operation after the period of time.