Electronics Engineering
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Electrical Engineering

What is forward pulse current in Led technology?

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June 09, 2007 3:14PM

When a LED is multiplexed, it is energized not all the time, but only for short periods. Let's say it's in a row of three - this would mean it's only on for 33% of the time. If the current remains the same, it's only 33% as bright. By increasing the current, you make it look as bright as if it were on all the time, even though it isn't. This "pulse current" is thus higher than the normal maximum; because it's only applied for such short periods, it will not damage the LED.