FIELD: electricity.
SUBSTANCE: main idea is measurement or perception of levels of current or cycles of activation from pulse width modulation in the previous segment (N-1) in a chain of segment from LED excitation devices with associated LED chains, and control of current through the next segment (N) based on perceived current through the previous one. For example, each LED excitation device (10) can copy the same brightness adjustment level to the next segment, and thus, the same brightness adjustment can be obtained for several segments without any need for separate wiring for distribution of a brightness adjustment signal.
EFFECT: simplifying the device.
10 cl, 6 dwg
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