LED Technology News

Nichia UV LED, new releases update: July 2021

Nichia UV LED, new releases update: July 2021

Nichia UV LED product line update 07-2021

 

Nichia is the world's largest LED manufacturer, leading the supply of innovative LEDs to all markets, including UV and UVC LEDs. Durability, brightness and homogeneity are among the major strengths of the Nichia brand. Furthermore, the fine selection allows greater added value for professional processing.

As of 07-2021 the UV portfolio of Nichia as the presented below, with new additions:

  • New UVC LED: NCSU434A at 280nm and 17.5mW for 0.5W power
  • Update of UVC LED: NCSU334B, radiant power increased from 55mW to 70mW at 280nm for 1.8W power
  • New UVA LED: NWSU333B, with an amazing radiant power of 4900mW at 365nm for 12.25W power

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SunLike Natural Spectrum LEDs reveal the true 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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Seoul SunLike LEDs ease eye strain and improves sleep patterns, research confirms

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.

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

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

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-V1MT) and 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 and Japan

Nichia Optisolis LEDs light art museums across Germany and Japan

The innovative Optisolis LEDs from Nichia have a light spectrum that 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 Nichia Optisolis LEDs high quality of light 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 and LED strips 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.

Many museums in Germany have implemented the Nichia Optisolis lighting, among them: 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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Innovative SunLike natural, full spectrum LEDs by Seoul Semiconductor

Innovative SunLike natural, full spectrum LEDs by Seoul Semiconductor

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.

SunLike LED techology from Seoul Semiconductor and Toshiba

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.

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

NICHIA Ultra-High CRI: Optisolis™ LED emitters’ natural light closely matches spectral profile of sunlight.

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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Nichia Vitasolis, Enhanced White LEDs for Human Centric Lighting (HCL)

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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Fact Sheet on UV Disinfection for COVID-19 (2021 update)

Fact Sheet on UV Disinfection for COVID-19

The scientific community now strongly believes that UV disinfection technologies can play a role in a multiple barrier approach to reducing transmission of the virus that causes COVID-19, SARS-CoV-2, based on current disinfection data and empirical evidence. UV is a well-known disinfectant for air, water and surfaces that, when used correctly, can help reduce the risk of infection from contact with the COVID-19 virus. Leading experts from around the world have gathered to develop a guide to the effective use of UV technology as a disinfection measure to reduce transmission of the COVID-19 virus.

It should be noted that "UVC", "UV disinfection" and "UV" as used here and in the scientific, medical and technical literature refer specifically and importantly to UVC light energy (200-280nm light) in the germicidal range, which is not the same as UVA and UVB radiation used in tanning beds or sun exposure.

Facts about UV and COVID-19

Can UVC help prevent the transmission of COVID-19 by reducing contamination?

Based on the available evidence, scientists believe so. Here's why:

  • UVC light has been used extensively for more than 40 years to disinfect drinking water, wastewater, air, pharmaceutical products and surfaces against a whole range of human pathogens. All bacteria and viruses tested to date (many hundreds over the years, including other coronaviruses) respond to UV disinfection. Some organisms are more sensitive to UVC disinfection than others, but all tested to date respond at the appropriate doses. For info about the Fluence (UV Dose) Required for up to 99% disinfection from Viruses, Bacteria, Protozoa and Algae , based on 413 reasearch papers, read our related article.
  • UVC disinfection is often used in conjunction with other technologies in a multi-barrier approach to ensure that any pathogen that is not 'killed' by one method (e.g. filtering or cleaning) is inactivated by another (UVC). In this way, UVC could now be installed in clinical or other settings to supplement existing processes or shore up existing protocols when they are exhausted by excessive demands due to the pandemic.
  • COVID-19 infections can be caused by contact with contaminated surfaces and subsequent touching of facial areas (less common than human-to-human, but still a problem)[vi]. Minimising this risk is critical as the COVID-19 virus can survive on plastic and steel surfaces for up to 3 days[vii]. Normal cleaning and disinfection may leave some residual contamination that can be treated with UVC, so a multiple disinfectant approach is advisable. UVC has been shown to achieve a high level of inactivation of a close relative of the COVID-19 virus (i.e. SARS-CoV-1, tested with an appropriate dose of 254nm UV while suspended in liquid)[viii]. Scientists believe that similar results can be expected in the treatment of the COVID-19 virus, SARS-CoV-2. However, the key is to apply UVC in such a way that it can effectively reach all remaining viruses on these surfaces.
  • There is widespread agreement with CDC guidance for hospitals that the germicidal efficacy of UVC is influenced by the UVC-absorbing properties of the suspension, surface or aerosol in which the organism is located, by the type or spectrum of action of the microorganism, and by a variety of design and operational factors that affect the UV dose delivered to the microorganism (https://www.cdc.gov/infectioncontrol/guidelines/disinfection).

 

The scientific community recognizes that in cases where the UVC light cannot reach a particular pathogen, that pathogen is not disinfected. However, in general, by reducing the total number of pathogens, the risk of transmission is reduced. The total pathogen load can be significantly reduced by applying UV light to the many surfaces that are easily accessible, as a secondary barrier to cleaning, especially under hurried conditions. This would be a relatively simple matter of illuminating relevant surfaces with UVC light, e.g. the air and surfaces around rooms and personal protective equipment.

UV light, specifically between 200-280nm[i] (UVC or the germicidal range), inactivates (aka, "kills") at least two other coronaviruses that are close relatives of the COVID-19 virus: 1) SARS-CoV-1[ii] and 2) MERS-CoV[iii] [iv] [v]. An important caveat is that this inactivation has been demonstrated under controlled conditions in the laboratory. The effectiveness of UV light in practice depends on factors such as exposure time and the ability of UV light to reach viruses in water, air and in the folds and crevices of materials and surfaces.

Are UVC disinfection devices safe?

Like any disinfection system, UVC devices must be used properly to be safe). They all produce varying amounts of UVC light with a wavelength of 200nm-280nm. This UVC light is much "stronger" than normal sunlight and can cause a severe sunburn-like reaction on your skin. The target tissue in the eye would be the cornea (and not the retina). The effect on the cornea is called photokeratitis, which is also known as sweat flash or snow blindness, so it's like sunburn of the eye. It is unlikely that any of the UVC light will pass through the cornea and then the lens to reach the retina as it is a short wavelength (i.e. high frequency).

Some devices also produce ozone as part of their cycle, others produce light and heat like an arc welder, still others move during their cycle. Therefore, general machine and human safety must be considered with all disinfection equipment and these considerations should be addressed in the operating manual, user training and relevant safety regulations.

Are there performance standards and UVC validation protocols for UV disinfectors?

Given the wide range of UVC devices marketed for disinfection of air, water and solid surfaces, the lack of uniform performance standards and the widely varying degree of research, development and validation testing performed on different devices, the scientific community strongly recommends that consumers exercise caution when selecting devices and look for evidence of third-party testing and certification of device materials and electrical components by well-known organizations such as NSF, UL, CSA, DVGW-OVGW or other international requirements.

For UVC devices intended to inactivate air and solid surfaces in the healthcare industry,the scientific community is working intensively with national standards organizations in the lighting and healthcare industries to develop disinfection test standards[x]. The goal is to develop guidelines that will help healthcare providers worldwide select the best possible technologies for their facilities in the fight against multidrug-resistant organisms and other pathogens[xi], such as the COVID-19 virus.

 

Resources

References:

[i] “Miscellaneous Inactivating Agents - Guideline for Disinfection and Sterilization in Healthcare Facilities (2008);” Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Healthcare Quality Promotion (DHQP) (https://www.cdc.gov/infectioncontrol/guidelines/disinfection/disinfection-methods/miscellaneous.html)

[ii] “Large-scale preparation of UV-inactivated SARS coronavirus virions for vaccine antigen,” Tsunetsugu-Yokota Y et al. Methods Mol Biol. 2008;454:119-26. doi: 10.1007/978-1-59745-181-9_11.

[iii] “Efficacy of an Automated Multiple Emitter Whole-Room Ultraviolet-C Disinfection System Against Coronaviruses MHV and MERS-CoV,” Bedell K et al. ICHE 2016 May;37(5):598-9. doi:10.1017/ice.2015.348. Epub 2016 Jan 28.

[iv] “Focus on Surface Disinfection When Fighting COVID-19”; William A. Rutala, PhD, MPH, CIC, David J. Weber, MD, MPH; Infection Control Today, March 20, 2020 (https://www.infectioncontroltoday.com/covid-19/focus-surface-disinfection-when-fighting-covid-19)

[v] Ibid.

[vi] “Preventing the Spread of Coronavirus Disease 2019 in Homes and Residential Communities”; National Center for Immunization and Respiratory Diseases (NCIRD), Div. of Viral Diseases (https://www.cdc.gov/coronavirus/2019-ncov/hcp/guidance-prevent-spread.html)

[vii] “New coronavirus stable for hours on surfaces”; CDC (extracted from N van Doremalen, et al. Aerosol and surface stability of HCoV-19 (SARS-CoV-2) compared to SARS-CoV-1. The New England Journal of Medicine. DOI: 10.1056/NEJMc2004973 (2020) (https://www.nih.gov/news-events/news-releases/new-coronavirus-stable-hours-surfaces).

[viii] “Inactivation of SARS coronavirus by means of povidone-iodine, physical conditions and chemical reagents;” Kariwa H et al. Dermatology 2006;212 (Suppl 1): 119 (https://www.ncbi.nlm.nih.gov/pubmed/16490989)

[ix] “Ultraviolet Radiation and the Work Environment (Revised. See: 74-121),” The National Institute for Occupational Safety and Health (NIOSH), Page last reviewed: March 29, 2017 (https://www.cdc.gov/niosh/docs/73-11005/default.html)

[x] “Pathway to Developing a UV-C Standard – A Guide to International Standards Development”, C. Cameron Miller and Ajit Jillavenkatesa, IUVA News / Vol. 20 No. 4, 2018

[[xi] “Healthcare Associated Infections Workshop Advances Development Of Ultraviolet Disinfection Technologies,” IUVA Press Release, dated 24 Jan 2020 4:14 PM (http://iuva.org/Projects-Articles-Repository/8672736)

Highly efficient disinfection UVC LED systems

 

Flip Chip (CSP) LEDs performance comparison test: Nichia LEDs in first place

Flip Chip (CSP) LEDs performance comparison test: Nichia LEDs in first place

CSP, or Chip Scale Package, is defined as an LED package with a size equal to or less than 20% of an standard LED chip. The CSP product has integrated component features that do not require soldered wire connections, reducing thermal resistance, reducing heat transfer path, and reducing potential sources of error.

Lets compare the CSP LEDs from leading LED manufactures Nichia, Samsung, Philips Lumileds and Seoul Semiconductor. 

 

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