US Patent No. 10,602,579

METHOD FOR REGULATING AN OPERATING CURRENT OF A LIGHTING UNIT AND CONTROL DEVICE AND MOTOR VEHICLE


Patent No. 10,602,579
Issue Date March 24, 2020
Title Method For Regulating An Operating Current Of A Lighting Unit And Control Device And Motor Vehicle
Inventorship Christian Stoeger, Vienna (AT)
Emil Kovatchev, Vienna (AT)
Assignee Continental Automotive GmbH, Hannover (DE)

Claim of US Patent No. 10,602,579

1. A method of controlling an operating current of a lighting unit by a control device, wherein the lighting unit is connected to a contact pair of the control device, the contact pair being formed of two electrical contacts, and the lighting unit has a light emitting diode arrangement that is operable via the contact pair, and the control device operates the light emitting diode arrangement by generating an operating current that flows via the contact pair, the method comprising:providing the lighting unit with an electrical coding capacitor connected in parallel with the light emitting diode arrangement;
setting with the control device at least one parameter of the operating current depending on a diode type of the lighting unit; and
generating, with the control device, a measurement current that flows through the lighting unit via the contact pair, and identifying, with the control device, the diode type based on a charging duration required for charging the electrical coding capacitor with the measurement current.