A new spectral modulation technique - - like healthy light source of sunlight

A new spectral modulation technique - - like healthy light source of sunlight

  • 2020-03-27
  • Views:1

A new spectral modulation technique - - like healthy light source of sunlight

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  • Categories:NEWS
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  • 2020-03-27
  • Views:1

As the largest and fastest growing industry in the world, big health industry has become a new engine of global economic development.The development of healthy lighting focuses on safety, high quality and comfort, and it is important to master the therapeutic illumination, active health intervention and customization of personality.On December 20, 2019, and light and Frankfurt, Aladdin, south lighting institute network joint health lighting industry chain leading group, jointly launched "2019 light health industry market trends summit", invited many research in the field of the top experts, business leaders, according to different themes and topics, from a biological, medical, vision, technology, standards, industry development, and many other direction to explore, in-depth dialogue, promote the development of healthy lighting industry in the future.

Humanity's need for light is constantly on the rise.Heidike has two ways to deal with it, one is full spectrum or sunlight-like SMD and COB, the first is about health and human lighting.In 2017, the Nobel Prize was awarded to the three experts, who mainly discovered the non-visual sensitive curve, its spectrum of about 475, 480, in addition to the blue light harm of a sensitive range, the central value of 430, 440.The pink spectrum in the middle, which is the spectrum of leds that we use traditionally today, you can see that the spectrum that we use to excite 450 blue light is still in the short wavelength range, which has a greater impact on the retina.Because long wavelength blue light is missing, it is relatively poor in the regulation of rhythm.

In our view, there are two ways to achieve a better regulation effect. One is traditional, namely, directly using blue light chip to stimulate, using a relatively short wavelength phosphor powder, phosphor powder reached about 495, 500 nm, its spectrum to the rhythm of the adjustment component will be more, 97 and 90.First, because it has more long-wavelength blue light, the white light is made up of blue, green and red primary colors, so short-wavelength blue light can be relatively less.The other, which is part of the rhythm regulation, is more of the long-wavelength blue and short-wavelength green, and more of the red.Teacher he kaijun gave us a topic today, that is, how much red light about 700?It's honest to admit that in leds, unless you're using a pure red light chip, using a phosphor, there's basically not enough red light in the order of 700 nanometers, because then the LED's light efficiency drops very low.

Here's a little bit of a coincidence. On May 21, 2018, I saw a news release from riya, who launched a product called Vitasolis, which compares this blue spectrum with the traditional spectrum, and you can see that it's saddle in the phosphor part.This saddle, he said, was a very natural white light, and it was a natural white light.But because it has more blue light at longer wavelengths, he says it can increase the regulation of the rhythm, increasing energy.Just the CoreSP?The technology, which works the same way as this one, is basically enough blue light in this long band.

The second way, which I think is a little bit more relevant to today's topic, is the solar like spectrum or the strong spectrum.So in this case, I'm going to compare it to the one that I just talked about, which is 90, and it's going to essentially fill in the hole that's going down around 480.You can see that I used the violet chip to excite this blue light, and the short wavelength blue light went down quite significantly, the long wavelength blue light was more abundant, and the violet light was there but not too much.The red light, it's still very far from the red light in the solar spectrum, but it's still relatively tilted.

The first way should be to make a more prominent contribution to the industry, here it is to use all purple light chip to stimulate a variety of phosphors, including about 450, 475 phosphors, it should be very superior to the spectral properties of the simulation, including blue light damage, adequate rhythm regulation, but also has the following shortcomings.The first one is expensive and low light efficiency.Another point USES 475 phosphor powder, its power is more difficult to go up.

The second is to use multichannel blue chips to stimulate phosphor powder, the more important is around 430, the blue chip, at the same time fill it in some other blue light, on the one hand, 430 inspired longer wavelengths phosphors, but if we look at the figure on the right in the middle of the word, its launch in 480, but it inspired sharply after more than 400 nanometers, if at around 430, it stimulates the efficiency is very low, so the effect is?The long wavelength blue light produced by the rhythm regulation is not sufficient, there is a great chance that the blue light of 430 will be a little too much, but this scheme is relatively high in light efficiency and low in cost.

Another way is to use a violet chip to produce long wavelengths of blue light, while at the same time having enough phosphors of other wavelengths to excite it.This is using our sunlight-like COB, which can simulate the spectrum of sunlight at different time periods, including the blackbody radiation at night.

This is a couple of different solar spectra, the first two of which are from a leading brand in the industry, 5000K and 5600K. You can see that the spectral continuity is very good, but the purple part is sometimes a little bit more.The other thing is, it's a good long wavelength blue spectrum, a long wavelength blue light and it's excited by phosphors.At the bottom left is the mainstream spectrum, which is less well complemented by the long-wavelength blue spectrum.Right down here is using heidecco CoreSP, right?Technical production of 4500K class of sunlight.You can see that the violet component is there, but it's reasonable, it's very low.So short wavelength blue light, which is basically flat to the whole spectrum, is pretty well controlled.The dent in the long wavelength blue light, it's almost hard to see, so from a spectral point of view, I think this is the same as CoreSP, right?From the point of view of the limitation of violet light and the filling of long wavelength blue light, not bad.The SMD, made using this technique, consists of an analog 3000k-like sunbeam.The other one is 4500K, and the other one is 5500K with high color temperature. In this case, you can see that the filling effect of long wavelength blue light is also very good.(Reprint)

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