LIGHTING DEVICE FOR VEHICLES
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United States of America Patent
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app pub date -
Nov 3, 2017
filing date -
May 8, 2015
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Abstract
A method for symmetrising the branches of a lighting device for vehicles having at least two LED branches (ZW1, ZW2 . . . ZWn) connected in parallel. Each branch has at least one series resistor (R1 . . . Rn) and at least one LED (D11 . . . Dn2) connected in series. The at least one series resistor (R1 . . . Rn) of each branch is bridged by a conducting track (LA1 . . . LAn) provided on a printed circuit board. This conducting track is accessible for a tool of a depanelling device, with the aid of which said conducting track can be severed. The current through each branch and/or the brightness of at least one LED (D11 . . . Dn2) is measured in each branch, and in a branch in which the measured current and/or the measured brightness exceeds a definable limit value, the bridging conducting track of the at least one series resistor is severed with aid of the tool.
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