| 摘要 |
<p>A daisy chain dimming solution can be applied in all kinds of LED driver topologies. A central idea is to measure or sense the current levels or pulse width modulation duty cycles in a previous segment (N−I) in a chain of segments of LED driving units with associated LED strands, and control the current through the next segment (N) based on the sensed current through the previous. For example, each LED driving unit (10) can copy the same dimming level to the next segment, and in this way the same dimming can be obtained for several segments without the need for separate cabling for distributing a dimming signal.</p> |
