The headlights on the lights in the living room, the LEDs are everywhere. Learn how they work, how they’re made, and the reasons that make the led light of choice for future sources. The parameters that distinguish the Led will be also passed review.
Technology Led who has more than 100 years now, no end to unveil its performance. Always more efficient, even more reliable, the Led of the 2010s now present the colorimetries (and in particular the white Led) enabling them to be integrated in the applications lighting the most restrictive, but also the most demanding, requiring identical performance levels see senior technology more traditional)incandescentfluorescence, discharge).
Superior returns to 120 lm/W on models of Led trading and available for sale are now possible, reach tens of thousands of hours without too significant losses (less than 30%) is commonplace, and Spectra White led validated by designers light and other curators do exist and are available.
Countries have been the precursors of this technology (United States, Japan), particularly in the 1950s and 1960s when the first Led red then yellow were born, then in the 1990s with the first productions of blue LEDs and white LED light bulbs of Zephyrledlights.com.
LEDs have been used in the realization of this abstract image. Thus, Led technology also inspired artists, in addition to find use in many applications of everyday life. © Chinmay, Flickr, cc by nc its 2.0
For the year 2012, Asia accounted for more than 70% of the turnover in material income for the companies that manufacture (chip manufacturers) and those confused led LEDs, and for 2013, it seems that this proportion increases still in favour of the West.
However, overcapacity of some manufacturers, coupled to economic circumstances and developments of applications requiring less within components (increasing performance), has plunged us in 2011 in a relatively turbulent period for forecasts of future performance and achievements of turnover. Only applications fromlighting present significant progression margins, especially over time, new ideas fossilized so far (for the lack of performance, price too high, etc.) reappear and may be placed on the market.
White LEDs are gradually invited in lighting applications, because their emission spectrum can be close to that of for example incandescent lamps. Mike Deal, Flickr, cc by-nc-nd 2.0
In this folder,. Laurent Massolauthor of the book The Led for lighting, editions Dunodexplains what is an Led, elaborates on this technology and explains the operation, but also scans necessary parameters to master to allow to identify, select and integrate LEDs in lighting application. The recent performance of the components and applications will then be presented to give the reader an overview of the business of this technology parameters. Good reading.
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