Quantum dots for LEDs

Last month, I wrote about CFLs and LED light bulbs, and today, I found a great video from Economist magazine, which not only talks about a new technology called quantum dots, but also does a great job of explaining the differences between incandescents, CFLs and LEDs when it comes to the light spectrum and lumens they emit.

It turns out a company in Massachusetts called QD Vision is among a handful of companies that are developing quantum dot filters for LED bulbs. These filters improve the spectrum emitted by LEDs to make the light less harsh, warmer, and closer to the spectrum of incandescent light bulbs, which ultimately makes it more pleasing to the eye. Personally, I think their filters make the light slightly redder than it needs to be, but still, it’s a step in the right direction.


2 Thoughts

  1. Very interesting technology. Thanks for sharing. I do know that companies such as Philips Lumileds are working to solve the same issue. I don’t know the exact technology they are using but I believe they are developing advanced phosphors that emit a much warmer spectrum. There are also other technologies to solve the spectrum issue. One is to use red, green & blue LED’s in an array. With the proper control circuitry, you can create just about any color in the visible spectrum. I have seen examples of this that work very well. At the moment, what is keeping these technologies from being mains stream is the cost. In the next 5 or so years I believe we will see the cost of LED technology for residential lighting become competitive with CF bulbs, but with the advantages of much longer useful lives, higher efficiencies and the elimination of the mercury disposal problem.

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    1. Glad you liked it, Jeff! It’s so interesting to watch what’s coming down the pike when it comes to lighting. I don’t know why, but I’ve always been fascinated by light bulbs. It’s so cool to see an inanimate object generate light.

      On a related note, did you hear about Parans Luminaires? It’s natural daylight, captured on rooftops and delivered through fiber optic cables inside a building. That’s also really neat.

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