Zkw Group Gmbh

Martin Biesenberger

Friedrich Bauer

Dietmar Kieslinger

Stefan Miedler

Emanuel Weber

Julian Baker

Gerald Fritz

A method and a circuit arrangement for feeding n LED units (LEDto LED) of a lighting unit of a motor vehicle by way of a controlled power source () from a voltage source () having a fluctuating operating voltage (U), in which the LED units (LEDto LED) are interconnected, and in particular k LED units (LEDto LED) of a series connection are short-circuited, when the operating voltage (U) drops, taking a stored weighting with respect to the priority assigned to individual LED units into consideration, wherein current continues to flow simultaneously through (n&#x2212;k) LED units. A memory unit () for storing information about weightings on the priority of certain LED units is assigned to the control unit () for activating the power source, a switching matrix (', Sto S), and in particular a circuit arrangement composed of n controlled switches (Sto S) that each bypass the LED units (LEDto LED, LED) is provided, and the control unit () is configured to compared the operating voltage and/or the current (I) of the power source to predefinable threshold values and to interconnect the LED units as a function of this comparison and the weighting.

Method and circuit arrangement for feeding a series circuit of n LED units

The invention relates to a method for producing a lighting unit of a vehicle headlight, comprising the following steps: provision of a printed circuit board () comprising a plurality of groups (A, B, C) of contact pads () for contacting LEDs (), population of contact pads () in the groups (A, B, C) with LEDs (), wherein the contact pads () to be populated are selected according to a desired light function of the respective group (A, B, C), and provision of securing means (A&#x2033;, B&#x2033;, C&#x2033;) for reflectors (A', B&#x2032;, C&#x2032;) on the printed circuit board (), wherein each securing means (A&#x2033;, B&#x2033;, C&#x2033;) is specifically designed for a reflector (A&#x2032;, B&#x2032;, C&#x2032;) that is adapted to the light function of the respective group (A, B, C).

Method for producing a headlight assembly

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Persenbeug, Austria

Martin Biesenberger