LED light bulbs are far superior light bulb and co. in terms of energy efficiency, durability, and environmental friendliness. In the future, they should be even better.Researchers are currently working on a new semiconductor material as well as a fluorescent, which could revolutionise the colour rendering of white LED.
Despite their enormous efficiency LED bulbs have yet two weaknesses: the colour rendition quality and theirvulnerability to fluctuations in power. You will notice both though hardly household use, researchers are working but still on troubleshooting – with two ground-breaking achievements.
Fluorescent Revolution Improved Colour Rendering White LED
The Ludwig-Maximilians-University of Munich and the Lumileds Development Center Aachen managed to develop a new fluorescent . The light bulb, the strontium, lithium, aluminium and contains nitrogen with europium, surpasses all previous Red-emitting Phosphors and produces a pure red. What a red fluorescent has to do with white LED? Clearly – for generating white light you need intense red light. White light is caused by the manipulation of blue-emitting light-emitting diodes that are coated with different ceramic Phosphors, absorb light and convert all visible spectrum. This mixture is finally white light. The problem so far: no pure red – achieved with the common, red-emitting fluorescent white light quality. That changes the new fluorescent.He not only ensures better colour rendition quality, but increases light output by 14%.Soon, there could be powerful and affordable LED replacement for incandescent bulbs of 100 Watts.
Compact LED Lamps With Higher Light Output And Less Vulnerable To Power Surges
At the Fraunhofer Institute for applied solid state physics, meanwhile is research on Gallium nitride transistors. The advantage of gallium nitride (GaN) is a better dielectric strength and power density compared to Silicon, which so far is used as a semiconductor. Thus, higher temperatures, larger voltages of over 600 volts and currents up to 100 amps are possible with GaN.
In addition, gallium nitride switch with three to tenfold higher frequency than silicon transistors.A higher switching speed, in turn, means that you can be less built-up coils and capacitors in the driver and need less cooling . This more circuits can be, installed on a smaller area making the LED lamps of the new generation not only compact, but also more efficient and cheaper.
First test results according to the efficiency of gallium nitride drivers is 86%. The light output is even twice as high as that of LED lamps with Silicon 2090 lumens.
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