METHOD FOR OPERATING A CIRCUIT CONFIGURATION WITH A CONTROL AND/OR REGULATING MEANS FOR A LIGHT DIODE FIELD

摘要

A method for operating a circuit configuration which includes a power source, a light diode field switched serially with the power source in which the light diode field comprises at least two serial circuits including at least one light diode and a switch, a control and/or regulating means for the light diode field, and a voltage sensor. The control and/or regulation means controlling the controllable switches and the power source such that the control and/or regulation means addresses the controllable switch of at least one serial circuit of the light diode field during a clock cycle for a pulse duration determined by the control and/or regulation means using a control pulse at the control input of the controllable switch for closing. The control and/or regulation means addresses the power source shortly before or at the latest simultaneous with the end of a pulse duration such that the current is reduced, namely by the amount of current through the serial circuit. The controllable switch at the end of the pulse duration is addressed by the control and/or regulation means for opening. During subsequent clock cycles the control and/or regulation means switch on only one of the controllable switches of the serial circuits for a period identified as diagnostics period.

主权项

1. A method for operating a circuit configuration which includes a power source, a light diode field switched serially with the power source in which with the light diode comprises at least two serial circuits which include at least one light diode and a controllable switch, a control regulation means for the light diode field, and a voltage sensor, the method comprising the steps of:
controlling the controllable switches and the power source with the control regulating means, wherein the control regulation means addresses the controllable switch of at least one serial circuit of the light diode field during a clock cycle for a pulse duration determined by the control regulation means using a control pulse at the control input of the controllable switch for closing, and wherein the control regulation means address the power source shortly before or at the latest simultaneous with the end of the pulse duration such that the power is reduced, namely by the amount of current through the serial circuit, with its controllable switch at the end of the pulse duration being addressed by the control regulation means for opening, and wherein during subsequent clock cycles the control regulation means address exclusively one of the controllable switches of the serial circuits for a period identified as diagnostics period for closing.