New Product Of NICHIA Upgrades Again

 On October 6, NICHIA unveiled the high high output UVC LED NC4S334BR, further demonstrating its commitment to UVC LED technology.

The new high output UVC LED NC4U334BR is 6.8*6.8mm and still uses 280nm band to maximize virus capability and maintain practical reliability. At the same time, it can generate 200mW radiation flux at 7.8W input power. Significantly increases the available virus killing power without sacrificing service life. It is one of the highest output UVC LED in the industry.

According to the official information, NC4U334BR’s high output can bring greater possibilities for industrial water treatment and air purification. Previously, the available radiation flux in a given space was limited, and because of the industrial scale traditionally associated with mercury lamps, the instantaneous on/off operation capability of LEDs significantly reduced standby power compared to the time required for mercury lamps to reach full power.

On Sept. 21, NICHIA also issues using high radiation flux 280nm NCSU434B UVC LED, has the highest power conversion efficient 3.5*3.5mm LED. In the typical input power under the condition of 350mA/5.7V, the typical radiation flux is 62mW. In addition, in high density installation, the radiation flux per unit area is about three times that of traditional products. At present, mass production has begun for a variety of bacterial and viral applications, particularly for industrial water and air applications.

UVC LED is one of the most popular sterilization methods, which is expected to completely change the effect of sterilization and disinfection, and may bring more safe sterilization facilities. This is a common understanding in the industry, and it is also an important transition road for UV disinfection from the current mercury lamp to UV LED disinfection in the future.

The last high output UVC LED NC4U334BR is designed to meet the market demand for industrial water treatment and air purification to a certain extent. Importantly, this small but efficient UVC LED can provide high radiation flux, high power. Compared to previous technology, the solution provides better system miniaturization and highly stable long-life performance.

NICHIA is committed to continue to focus on the development of deep ultraviolet LEDs with higher performance and reliability, and to help achieve a mercury-free and carbon-free society through energy conservation.

NICHIA NCSU434A UVC LED 280nm Deep Ultraviolet Light Emitting Diode UVC Lamp Beads

NICHIA has also launched the mid-power NCSU434A UVC LED emitter, which produces a lower radiant output of 17.5mW at a drive current of 100mA and a forward voltage of 5.3V. Smaller than the NCSU334B, the NCSU434A is supplied in a package which measures 3.5mm x 3.5mm x 1.7mm.

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Applications of 280nm NCSU434A UVC UV LED Light Bead:

Industrial equipment

Water purifiers

HVAC systems

Features of NICHIA Deep UVC Ultraviolet LED:

10nm spectrum half-width

110°C maximum junction temperature

Package specifications:

NCSU334B: 6.8mm x 6.8mm x 2.1mm surface-mount package

NCSU434A: 3.5mm x 3.5mm x 1.7mm surface-mount package

NICHIA NCSU434A UV LED Disinfection:

Ultraviolet light technology is a hot topic in the lighting industry today, as UV light is capable of disinfecting and killing biological impurities. In particular, UV-C LEDs are said to revolutionize sterilization and disinfection, improving the safety of health facilities specifically, which is a much needed development in the current pandemic situation.

Peak Wavelength λp	Typ.(nm)	280
Radiant Flux ΦE	Typ.(mW)	62	17.5
Forward Voltage VF	Typ.(V)	5.7	5.3
	Max.(V)	6.5	6.0
Directivity 2θ ½	Typ.(degree)	110
IF	(mA)	350	100
Size	LxWxH (mm)	3.5x3.5x1.72

Bio-Safety Of 222nm Irradiation Lamp For Sterilization

 Because the UV sterilizing lamp currently in use has a wavelength of 254nm, it can cause strong damage to the human body, so it can only used in enclosed space. Various universities have published papers showing that 222nm does no damage to the DNA of epidermal cells and only hits the cornea. In other wards, the new sterilization device can be used in the general environment.

Ultraviolet Sterilization Principle

The DNA of bacterial and viral can be irradiated with 100 to 300nm ultraviolet light, and the DNA will lose its ability to replicate.

Safety of 222nm Excimer Lamp for Sterilization

The ultraviolet disinfection lamp with the wavelength of 254nm has been used for a long time, which can penetrate through the human body to the deep layer of the skin and have strong harm to the human body, so it can only be used in a confined space environment.

The wavelength of 222nm has no effect on human body, and can effectively inhibit bacteria and viruses, so it is a safe light source.

Therefore, it can be used in the ordinary living environment, and there is no restriction on the placement of all places.

the irradiation effect of 222nm excimer lamp and 254nm germicidal lamp

The 222nm excimer lamp is safe for UV irradiation. Our independently developed technology does not output harmful wavelengths to human body. The lamp technology is under patent application for 2020.

e・vio 400 exposure 380mm excimer lamp 222nm

e・vio 100 exposure 100mmexcimer lamp 222nm

e・vio miniature irradiator

e・vio the use effect of miniature irradiator

The Germicidal Experiment Process and Results of NICHIA Exposure at 280nm

 NICHIA Corporation (Headquarters: Anan City, Tokushima; President: Hiroyoshi Ogawa; hereinafter “Nichia”) announces confirmation through experimentation of the inactivation effect (99.99%) of NICHIA’s 280nm deep UV LEDs on the novel coronavirus SARS-CoV-2.

1.Summary of the experimental results

This experiment was carried out by Professor Masako Nomaguchi and Assistant Professor Takaaki Koma of Tokushima University Graduate School of Biomedical Sciences.

Experimental environment (reconstruction) irradiation conditions : irradiation distance 50mm, irradiance 1.7mW/cm2

Experimental results : the inactivation effect of Novel Coronavirus was confirmed to be 99.99% after 30 seconds of deep ultraviolet irradiation.

Irradiation time	Inactivation effect
30 seconds	99.99%
10 seconds	98.42%
5 seconds	93.28%

Table 1. Inactivation effect by irradiation time (reference values)

The Efficacy Assessment of Disinfecting Substances Alternative to Alcohol for Use Against Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) (Ministry of Economy, Trade and Industry) has judged virucidal efficacy of disinfecting substances against SARS-CoV-2 on the basis of the criterion set at a 99.99% or more reduction in viral titer.

The virucidal effect of handwashing and hand sanitizers, recommended as measures to control infectious diseases, is reported to be

• about 99% when washing hands with running water for 15 seconds

• 99.99% when using commonly-available alcohol-based hand sanitizer (containing 77–81% ethanol) for 30 seconds.

However, to get a better cleaning effect, hands must be thoroughly rubbed when washing with water. When using alcohol disinfection, sufficient amounts of alcohol are required to contact the object being sterilized, which takes time and effort.

According to the experimental results of deep ultraviolet ray, we know that it can easily achieve high sterilization effect in a shorter time.

We found that deep 280nm UVC UV LEDs may have a high virucidal effect while saving time and effort.

2. Virucidal power

Sterilization by deep 280nm Ultraviolet LEDs involves the following two factors:

• Wavelength: The difference in the virucidal effect according to wavelength shows that a wavelength of 260 nm exhibits the highest virucidal effect (100%).

• Optical output power: Higher optical output power (radiant flux) of LEDs is favorable.

Sterilization power is obtained by multiplying the virucidal effect according to wavelength by optical output power.

While the life span of the 265nm LED is expected to be approximately 2,000 hours, that of the 280nm LED is expected to be approximately 20,000 hours, or roughly 10 times as long as that of the 265nm LED.

The shorter the wavelength of light emitted from UV LEDs meanslower performance, such as output and lifespan.Therefore, the power conversion efficiency (i.e. wall-plug efficiency or WPE) of the UV LED also declines sharply. Conversely, NICHIA NCSU334B 280nm UVC LEDs can present higher output and longer lifespans.

In addition, the putative life of 280nm is about 20000 hours, while 265nm is estimated to be about 2000 hours, so 280nm is about 10 times longer. Ultraviolet LEDs have the characteristics that : when the wavelength is short, the performance such as light power and life will be reduced, and the photoelectric conversion efficiency will also be very low. This feature results in a high output power of 280nm and long life. Therefore, in consideration of higher bactericidal capacity and longevity, the wavelength of 280nm was adopted for this inactivation experiment.

3.Contribution of pilot products

NICHIA has contributed additional prototype hand-held UV irradiation devices that were made for the inactivation experiment to Tokushima Prefecture (20 units) and Tokushima University (30 units). This rechargeable, portable device can be easily used for sanitizing common spaces and surfaces where alcohol-based solution cannot be used.

NCSU334B
6.8x6.8x2.12
Wavelength	280nm
Radiant flux	70mW
Current	350mA
Forward voltage	5.5V
WPE	3.6%

This device is equipped with 12pcs deep 280nm Ultraviolet UV LEDs NCSU334B  at intervals of 25 mm These LEDs offer the industry’s highest radiant flux, 70mW (typical value), and WPE, 3.6%, at the peak wavelength of 280nm (typical value) (according to NICHIA research).

NICHIA will continue to devote itself to the development of high power deep ultraviolet LED with stronger bactericidal ability in the future, in order to overcome Novel Coronavirus, and hope that this deep ultraviolet LED is used in all kinds of products, also can bring you some help in daily life.

References

1) The Journal of the Japanese Association for Infectious Diseases, 80:496-500, 2006.

2) J. Antibact. Antifung. Agents, Vol.48, No.9, pp.477-480 (2020).

3) JIS Z8811-1968

4）from NICHIA Corporation News

Why Is NICHIA UV LED Fond Of 280nm?

 On December 29, in the expert said, UV LED wind direction jointly held by the expert said 2020 annual meeting · deep ultraviolet LED special summit forum, Mr. Hu Jun, deputy manager of Japan and Asia shared the "280nm sterilization solution and NICHIA UV LED products" keynote speech.

Hu Jun, vice manager of NICHIA, pointed out that NICHIA focused on the development of 280nm UVC LED and improve the optical power, and in 2019 successfully launched the wavelength of 280nm, power of 55mW UVC LED -- NVSU334A. In September 2020, NICHIA launched an upgraded version of 280nm 70mW UVC LED with an external quantum efficiency of 3.6%, while similar UV LED products on the market are usually 265nm.

So, why in a variety of UVC bands, NICHIA chose 280nm as a sterilization solution? Mr. Hu Jun made the scene to answer.

Mr. Hu Jun said that UV sterilization and other comparison, there are many advantages, but in the daily life scene or industrial scene, the use of UV sterilization is not very popular. And even in the sterilization method, the Minamata Convention requires the elimination of mercury, but mercury lamp utilization rate is higher than UV LED. This is because LEDs are not efficient enough to replace all mercury lamps used in everyday life and industry. Therefore, this is a problem facing LED enterprises together.

Therefore, for all LED enterprises, improving efficiency is a top priority. NICHIA chose 280nm as the UVC sterilization product, and it is the only one band, no other band. The reason why NICHIA chose 280nm is that its product development believes that higher conversion efficiency can be achieved at 280nm. The current mass-produced product has an efficiency of 3-4% and a very long life.

Through comparison and verification, the sterilization efficiency of 265nm UVC LED is 95% under the same condition of using 3W power. But the efficiency of 265nm UVC Ultraviolet LED light is not very high. So the power output is not high, which is 50mW. However, the killing efficiency of 280nm UVC LED Light Bead is 60%, which is lower than that of 265nm UVC LED. But it has higher efficiency and higher power output, which can reach 100mW. A simple calculation can be made based on the above data. The output power of 280nm UVC LED is 100mW multiplied by 60% of the sterilization efficiency to get 60 points. The output power of 265nm UVC UV LED Lamp is 50mW multiplied by 95% of the sterilization efficiency to get 48 points. This means that 280nm UVC Ultraviolet LEDs use less power to kill the same bacteria.

In addition, another advantage of 280nm UVC LEDs is that they last longer than 265nm UVC Ultraviolet LED Lights. For example, NICHIA NCSU334B UVC LED product maintains a 92% performance maintenance rate after 5000 hours of use. The 265nm UVC LED light beads dropped to 67% at the same time. From the user’s point of view, users want longer and more reliable products, not frequent replacement.

Therefore, NICHIA chose 280nm band as UVC LED Sterilization Lamp products, together with the industry, is committed to solving the pain point of low efficiency of UVC LED, effectively popularize the healthy and pollu-free sterilization program of UVC LED.

Hand-Held Bacteriocidal UVC UV Germicidal Lamp UV Sterilizer For Home Office Travel Disinfection

Sterilized UV LED Germicidal Lamp Killing Virus is a mercury free, safe and non-toxic Hand-Held Sterilization Equipment, can be rapidly sterilized in 60 seconds, the rate of sterilization up to 99.99%, and simple to operate, a wide range of uses.

Parameters of Portable UVC LED Lamp Killing Bacteria :

Size : 380*40*20mm

Power : 1.8W

Weight : 340g

Material : 6061 aluminium

Charging time : 2 hours

Time of using : 2.5 hours

Charge Mode : TYPE-C port

Switch mode : push button type

Light source : six high power deep UVC-LED Light Beads, evenly distributed

Two Modes of Using for Antiseptic UVC UV LED Sterilization Equipment for Disinfection :

Mode one: Press the bottom button, the indicator light turns blue, press the start button to sterilize, release it to stop. Mode two: Press the bottom button twice, the indicator light turns green. Press the start button to start sterilizing, and it will stop automatically after 180 seconds. Long press the bottom button for 1 second to turn the instrument off.

Applications of Bacteriocidal UV LED Disinfector for Sterilization and Disinfection :

Bedroom,Living room,Hotel,Restroom,Kitchen,Public area,Toys,Pet supplies,Cosmetic applicator.

Advantages of Deep Ultraviolet LED Sterilization compared with traditional mercury lamp ultraviolet disinfection are as follows :

1. Does not contain the heavy metal mercury, environmental protection

2. No ozone, safe for people

3. It takes less time to sterilizer and uses less electricity

4. Durable and hard to break

5. Small size, easy to carry

6. Low temperature, not easy to burn

Features of Hand-held UV LED Disinfectant Apparatus for Sterilization :

Type-C charging interface and it can be charged by portable power bank. Take good care of your families’ health without secondary pollution. Meet the need of low immunity of babies Meet the need of Environment of Pregnant women Meet the need of elder parents with decreased resistance to bacteria Kill the germs on pets.