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Digital LED Driver Technology Eliminates Harmful Flicker

Gradually, LED bulbs are replacing incandescent bulbs, and a negative of LED-based concepts is also appeared as well. It is reported that the flicker of LED Lights may cause the health problem, such as photosensitive epileptic seizure, myopia, and headache.New LED technology make the flicker away, and keep your health.

“IEEE experiments suggest US-based LED driver company iWatt claims that its technology avoids these problems. Two factors cause LED lamps to flicker. One is the mains grid frequency that can introduce low frequency flicker to the LEDs which, in contrast to incandescent bulbs, do switch on and off at the rhythm of the grid frequency - much in contrast to conventional incandescent bulbs which are simply to inert to react on the grid frequency. The other factor that transforms LED lamps into nervously flickering lights are dimmers - available dimming circuits frequently are optimized for incandescent bulbs; they cannot cope with quickly reacting light sources such as LED lamps.” It reported by Christoph Hammerschmidt.

The company has developed a two-stage driver topology with patented digital control technology which eliminates flicker under all operating conditions, Brown promises. The algorithm implemented in iWatt's digital LED drivers maps the operating characteristics of dimmers and digitally filters the LED drive current, effectively eliminating voltage spikes that otherwise would cause flicker. The company has characterized a representative sample of dimmers available and implemented its algorithm accordingly, resulting in smooth dimming and ensuring the elimination of low frequency flicker. "Health concerns have to be taken seriously", Scott said. "But our LED driver technology provides a cost-effective solution to safely eliminate this problem".


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