LED Technology News

Nichia's 2-1 Tunable White LEDs bring amazing new design posibilities

Nichia 2-1 Tunable white LEDs NF2W757G-MT NJCWL024Z-V1MT NVCWJ024Z-V1MT

The new Color Tunable Series from Nichia are game-changing single surface, tunable white LEDs that allow the user to smoothly transition color temperature from warm white to cold white.

The series are ideal for many applications, such as commercial, retail spot lights and residential downlights. Retail stores can change the light color based on their display or objects in it. Families will be able to change the color temperature of their home to best suit their natural biological rhythms.

Nichia’s color tunable LEDs are available in the standard 757 package and chip-on-board (COB).

Nichia 2-1 Tunable White 757 LED 2700-6500K

The game changing NF2W757G-MT in the standard 757 package use a new patented technology to allow smoothly transition from warm white 2700K to cold white 6500K. The significant innovation is its ability to accomplish color tuning under a small, single light emitting surface (LES), thus achieving superb color uniformity with high color quality, up to 90 CRI. The 2-in-1 tunable white 757 enables thinner, sleeker optical designs, eliminating the need for bulky mixing chambers.

Nichia 2-1 Tunable White COB LEDs 2700-5000K

The Nichia COB 2-1 Tunable White Series are available in two sizes, 24x19mm (NVCWJ024Z-V1MTand 19x16mm (NJCWL024Z-V1MT), and make posible to build lighting fixtures with adjustable color temperature from warm white 2700K to pure white 5000K.,Nichia's color tunable COB provides a smaller light emitting surface and better color mixing than other options on the market. 

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Nichia Optisolis LEDs light art museums across Germany

The innovative Optisolis LEDs from Nichia natural spectrum LEDs that emit light which closely matches the spectrum of natural sunlight.

The extraordinary result is achieved by using a revolutionary new phosphor technology and special blue LED chip. The spectrum of the 420nm blue chip contains almost no UV emissions and in combination with the phosphor achieves a CRI value of 98+, an ultrahigh number considering sunlight has CRI 100.

The high quality of light from Nichia Optisolis LEDs renders colors accurately and adds the benefit of increased awareness of contrast and texture. In combination with their very low UV emissions, Optisolis light fixtures are particularly suitable for use in museums and art galleries where the highest possible CRI value is preferred without damaging the valuable works of art with UV rays.

The first to implement Nichia Optisolis lighting are museums in Germany: Zeppelin Museum in Friedrichshafen, the Ludwig Museum in Koblenz and the Picasso Museum in Münster.

Zeppelin Museum Friedrichshafen: LED lighting (left) and Optisolis LEDs by Nichia / Lumitronix (right)

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NICHIA Ultra-High CRI: Optisolis™ LED: closest possible match to natural light


Nichia Optisolis LEDs with the full spectrum of sunlight

The latest innovation in LED development is the Nichia Optisolis technology. The full-spectrum NF2W757G-F1 and NF2L757G-F1 Optisolis LEDs from world market leader Nichia are capable of generating a light spectrum that comes closest to that of the sun. 

As a result, the Optisolis family of packaged LEDs are Ultra-High CRI light sources, with almost maximum scores for all 16 of the color samples that are used in the color rendering index metric. The 5000K Nichia NF2L757G-F1 Optisolis LED can achieve a Ra of 99 out of 100 and almost maximum IES TM-30-15 levels with Rf at 98 and Rg at 99. 

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Seoul SunLike LEDs ease eye strain and improve sleep patterns, two research studies discover

The positive health effects of the uniform spectral power distribution of the SunLike LEDs from Seoul Semiconductor have been confirmed in two independent studies, by universities from Switzerland and South Korea.

The new SunLike technology brings a major improvement to the LED spectral power distribution (SPD) which now mimics the SPD of the sun within the bounds of the human visual range. The SunLike LEDs LEDs use a three-phosphor mix and a violet emitter to achieve the SPD. Seoul has said that the LEDs can be used in a variety of applications including in human-centric lighting or lighting for health and well-being where tunable lighting can be applied to improve human well-being.

 

A study published by the University of Basel in Switzerland titled “Effect of daylight LED on visual comfort, melatonin, mood, waking performance, and sleep” found that volunteers had better visual comfort, more alertness, and happier moods associated with exposure to SunLike LEDs  compared LEDs. 

The university published the research in the Journal of Lighting and Research Technology. Professor Christian Cajochen led the research team investigating what they referred to as LEDs with a daylight spectrum.

The results are based on a study of volunteers who, in two separate test sessions, were exposed to Seoul Semiconductor SunLike LEDs in one session and to conventional white LEDs at the same CCT in the other session. The volunteers exposed to the uniform spectral power distribution (SPD) of the SunLike LEDs experience better sleep patterns and reported improved visual comfort and heightened daytime alertness.

15 young male volunteers took part in the tests in Basel, spending 49 hours twice in a laboratory. During each session, the volunteers received light exposure at the same CCT and intensity levels, the only difference being the SPD of LED-based lighting products. 

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SunLike Natural Spectrum LEDs reveal color and depth of artistic works

Seoul Semiconductor’s SunLike Series with TRI-R technology are the world’s first natural spectrum LEDs, as they produce light that closely matches the spectrum of natural sunlight. This is made possible by using a new LED architecture, with a purple emitter in combination with a red, green, and blue (RGB) phosphor mix, unlike conventional white LED that use a blue emitter and yellow phosphor. 

Spectra comparison Sunlike LEDs, sunlight, ordinary LEDs, fluorescent light

This new approach has the effect of accurate rendering of colors, almost as daylight, with the added benefit of increased awareness of contrast and texture.

Sunlike LEDs will make art have the same colors and contrast as under sunlight


The high quality of the SunLike LEDs light spectrum is expressed also by the traditional color rendering index (CRI) and the new Color Fidelity Index. Therefore, SunLike LEDs have CRI 97+ and  Rf 96(TM30 Fidelity Index), values that indicate the high accuracy of reproducing the original color from 99 representative color indexes.

SunLike TM-30 Color Fidelity Score

With the unique quality of the light spectrum, SunLike LED fixtures are perfect for lighting art, such as paintings, frescoes, mosaics, sculptures and many other exhibits. We will soon see art in many museums or historic places around the world in a new light.

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Innovative SunLike Natural Spectrum LEDs by Seoul Semiconductor

SunLike LED techology from Seoul Semiconductor and Toshiba

Seoul Semiconductor’s SunLike Series LEDs are the world’s first natural spectrum LEDs, as they produce light that closely matches the spectrum of natural sunlight.

SunLike LED package design


This achievement comes from using a new LED architecture, with a purple emitter in combination with a red, green, and blue (RGB) phosphor mix, unlike conventional white LED that use a blue emitter and yellow phosphor.  By removing the blue LED light source and replacing it with a purple light LED chip, lighting technology is fundamentally transformed. For the first time it is possible to render colors accurately with very low energy use and positive effects on health. Compared with other LED lights, the new SunLike Series does not have a blue energy peak associated with eye discomfort and poor sleep patterns.

Furthermore, an ordinary LED spectrum is very different to sunlight, whereas SunLike’s spectrum is very similar. Thus, the light sources with SunLike Series LEDs will more accurately show the color of objects, as they would appear in natural sunlight. It's natural light spectra has color rendering of CRI-97 – close to CRI-100 of sunlight, and much higher than the CRI-80 of conventional LEDs.

The SunLike packaged LED technology from Seoul is based in part on a Toshiba phosphor technology called TRI-R. By using the TRI-R, the LEDs deliver a uniform and broad spectral power distribution (SPD) that is more like sunlight than are typical phosphor-converted white LEDs.

The applications of this new LED technology, with its diminished blue light peak, similar spectral curve to sunlight, accurate rendering of colors and reduced scattered reflection and glare are many, from Human Centric lighting for our home and office to commercial and art lighting.

Human Centric lighting

‘Human-centric lighting’ describes lighting that is designed to work with the human body’s natural rhythms. It relies on the well-established fact that the human eye detects the presence of a particular wavelength of blue light in the spectrum that makes up sunlight, and uses this to judge what time of day it is. In this way, light helps regulate our sleep–wake cycles and other bodily rhythms, and has a significant impact on our mood and well-being.
Color temperature of sunlight
Human-centric lighting harnesses this effect by adjusting its brightness and colour temperature during the day to mimic natural light. To achieve its purpose, human-centric lighting must have a spectrum that resembles that of real sunlight, with just the right level of the crucial blue wavelength that triggers the body’s response. Most solutions described as human-centric do not have a spectrum that resembles that of real sunlight, so they end up providing too much or too little blue.

Seoul Semiconductor’s SunLike Series LEDs are different, as are the first LEDs to be closely matched to real sunlight, so they have the right level of blue that trigger the desired biological stimulus.

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Nichia Vitasolis, Enhanced White LEDs for Human Centric Lighting

The new Vitasolis™ technology from Nichia are LED light sources with spectrum meant to stimulate activity. 

 This development in based on recent research that has revealed in detail the relationship between light and human behavior. Humans can recognize the brightness and color of light while human circadian rhythms can be affected by different wavelengths, especially the blue-green area. For example, lighting has an effect on the level of activity throughout the day, including wake up in the morning, daytime activities, and nighttime sleep aids.

Vitasolis has a very natural white light and its spectrum contains more energy in the blue-green region, which helps control the human circadian rhythm. The spectral distribution of Vitasolis clearly illuminates the object while maintaining high light efficiency.

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Human Centric Lighting, a return to daylight basics

Human Centric Lighting

For most of history, humans lived, worked and slept under the governance of natural light. The flickering light of candles was a poor substitute and did little to change the rhythm of life for all but the wealthy few.

Life went on under a dynamic light ,with changing tone and brightness, as a day went by and seasons changed. Then, one day, electric light was invented and everything changed. From that point forward a "golden hour" or "afternoon" could be at any time of day, on any point on the planet or beyond, outside or inside, from our living room to a windowless office or deep underground.

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New LED design for increased performance and optimised lighting fixture cost

New Led Deign, the Flip Chip

When making a decision to purchase LED lighting technology we are usually put in the balance price and cost of ownership, the reason behind this being that LED technology is general more expensive. 

However, the current market penetration rate of LED shows the argument that lower cost of ownership due to energy savings and long product lifetime is more than worth price difference is convincing.

This approach can have serious problems when the promised long term savings do not materialize. A LED can fail or degrade sooner that expected due to many reasons, from false advertising (the LED design could never perform as advertised), poor handling of heat management to mistakes in the product design. A customer faced with this issue could loose trust in the LED technology.

The solution is to reduce the price of LED products without a compromise of performance and quality. Innovation is the way to do it as is the case of Nichia's new LED design with Direct Mountable Chip technology.

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