R&D NEW HOT POINT OF MEDICAL CARE— UVB

 

UVB — ultraviolet uv LED strip is the wavelength of 100 nm to 280 nm, which is of great value in the field of sterilization, medical, biochemical detection, high density information storage and secure communication. Compared with the mercury lamp UV light source, based on aluminum gallium nitride (AlGaN) materials ultraviolet light-emitting diode (LED) has the following advantages：Strong, energy saving, long service life, no mercury and environmental protection etc. UVB LED is gradually infiltrated into the traditional application fields of mercury lamp.At the same time, many other applications can now benefit from UVB LED.such as the white home appliances disinfection module, portable water purification system, mobile phone disinfection, etc., thus showing a broad market prospects, becoming the semiconductor lighting LED, the new hot spot of global LED research and investment.it’s  became global LED research and investment new hotspot in subsequent semiconductor lighting Research Report shows that the future of the LED market may be divided into two parts, one for general lighting visible LED; other is a high-tech innovation as the characteristics of UVB ultraviolet LED.Compared with visible LED, the luminous efficiency and the optical output power of UVB ultraviolet LED are lower than visible LED at present. But now we use the nano scale technology to produce nano pattern substrate,not only improved the quality of materials, but also improve the light extraction efficiency.

280 nm ultraviolet LED @ 20 mA current, the output power of the optical output reached more than 3 MW,can also optimize the packaging process, making deep UV LED light beads encapsulated can be achieved morethan 4 mW optical output power.

WHAT ABOUT THE LOT ELECTRIC CURRENT CAN BE BUILT USING INFRARED LED?

NOVEMBER 15, 2015 EDIT

What about the lot Electric current can be built using infrared LED?

General IR chip processing of the infrared LED can withstand only 4~500mA,preferably at added up to current-limiting resistance.the ir led be electric current under 300 mA in General. VF about in 1.7V the infrared emission tube almost reached the power of peak transmit.under the condition of ir chip with 300mA. All of ir led are subject to the most stringent testing and checking procedures with DC current 50mA.

In instantaneous the current of infrared led can reach the 800mA,then if you use poor infrared led can cause burning or transmit power attenuation fast, the infrared emission tube can withstand the instantaneous current of 1000mA,
but in the current led market, some ir led can withstand the instantaneous current of 1000mA,The solution can solve that problem. of course, the shortcomings of design is battery consumption faster.

Some key features of UV LED strip

 

Some key features of UV LED strip
UV spectral distribution, radiant intensity, radiant quantity and radiation density.
A: Spectral distribution
Spectral distribution is described that reach up to the wavelength distribution surface of the radiation energy. It is often used “nm” to express a relevant standard.
B:UV radiation intensity
Radiant intensity is the radiation power reach up to the surface area of the surface.  Radiation intensity as per square centimeter of “watt” or “mwatt” units to expressed. It varies with the output power, efficiency of the led strip,  Radiation intensity includes — all the factors related to power, efficiency, radiation output, reflectivity, the size and geometry of the led strip. Due to the absorption characteristics of the UV curable material, the light energy reach up to the surface above (below) is less than that of reach up to the surface. The curing conditions may be different in these regions. If the optical is too thick, it may reduce the light efficiency, it can cause the material of curing is not sufficient.

Three: UV LED strip’s radiant energy
The UV LED strip’s radiant energy  Represents that the total amount of radiation energy photons reach the surface of the printing products unit area (while the radiation intensity say the arrival rate). In any given light source, the radiation energy and inversely proportional to the speed of curing .  the radiation energy andtime of curing are inverse ratio.the radiation energy with an accumulation of Radiation intensity time.

 With per square centimeter Joule or mJoule can represent the unit of  radiation energy.  (unfortunately, there is no An Conversion Information between the spectral content and the radiation intensity.) .In ink or coating, the higher the surface of the radiation intensity will provide a high light energy.The Radiation intensity Was Influence depth of cure rather than longer curing time. High degree of radiation allows the use of less light initiator. The photon density increases of the photon – Collision photo initiator, thereby compensating for the lower light initiator concentration. This thicker coating will be effective, because the surface of the photo-initiator absorbs and hinders the same wavelength light to reach deep initiator molecules.

Four: radiation density
Infrared radiation is mainly emitted the infrared energy by the UV light source out. Infrared energy and UV energy is collected and focused on the work surface together Layer.It decision to efficiency of the IR reflectivity and reflector. IR energy can be converted to a single bit of radiation energy or radiation intensity. But in usually, it is the surface temperature is the important part needs to pay attention. There are many techniques to solve the between IR and UV relationship. It can be reduction of the transmission andControl heat transfer. Emission reduction is achieved by reducing the flow of the current.

Revert to Infrared LED light
Infrared LED light is an electromagnetic wave,The wavelength has a range of a few nanometers (1nm=10-9m) to 1 mm (mm).  a part of one's wave band that It is a visible light in the human eyes.we could call it into visible light, visible light wavelength range of 380nm ~ 780nm, visible light wavelength from long wave band to short wave band divided into red, orange, yellow, green, cyan, blue, Wavelength is short than purple, we called it Ultraviolet rays . avelength is longer than red we called it infrared light.

Infrared light Applications：
The infrared led have a long historical standing. Uses. In 1962, People discovered how to form the Electromagnetic wave of infrared ray(using on GaAs on behalf of the III V compound semiconductor PN node that it could be phenomenon of Electromagnetic wave).The infrared led were used to . AlGaAsP class GaAs semiconductor materials to generate infrared ray , The forward voltage of ir led strip is about 3.3V.Ir emitting infrared ray. In generally refers to luminescence center wavelength of over 700nm LED. Much as a remote control and infrared light communication, distance sensor light source, a light source and a printer opt couplers hand piece light source etc.

The question of “BATHROOMMASTER” and infrared light

The question of “BATHROOMMASTER” and infrared light
Question:“BATHROOMMASTER”produced heatingby infrared heating, didn't it?but why will have a strong visible light? Because there is part of the energy is converted to visible light, right? whether can only produce infrared light as the infrared searchlight? In addition, I wonder if there is a way to generate heating with the infrared searchlight.

Answer: Very simple, “BATHROOMMASTER” heating element is the lamp, the lamp emission can not be done in the visible light (filament appeared dark red). It only produces infrared light The lamp is open architecture, not in the bathroom of high humidity environment. can not stand the high humidity in the bathroom surroundings. Night vision system of infrared searchlight (by infrared LED) emitted infrared rays can also will be illuminated objects to heat up, but its power is very small,Each 5mm ir LED total power just only 30 MW, the infrared rays emitted by power within 5 to 10 MW,by that figuring, 100 pieces can only transmit 0.5W infrared.In contrast, “BATHROOMMASTER” each lighting power can reached 275W, the infrared emission power up around 200W. So People can not sense heat with the Night vision system of infrared searchlight. Of course, if you use high-power infrared LED, and increased in number When using this approach, the ir led strip also produces a hot.

Led terms

Led terms

Destination and divided are conveniently studied and scientists of application. The UV radiation is
put the UV radiation is divided into A-band (400 to 315 nanometer), B-band (315 to 280 nm) and C band (280-200 nm), and were known as UVA, UVB and UVC.Like other things, ultraviolet radiation can cause human advantageous aspects and negative aspects.

Through the research of the Science, ultraviolet radiation under matter effect can create a variety of matter effects. and be used for people.Radiometric measurement unit of physical is radiation energy, the radiation term can be applied to the entire electromagnetic spectrum, including microwave, infrared, ultraviolet and X-rays spectrum.

Graphical interpretation of IR led strip emission angle and intensity

Graphical interpretation of IR led strip emission angle and intensity
IR led strip Is the electrical energy, it Can be converted into electrical energy to near-infrared light directly (not visible),is directly converted into near infrared (not visible), it is emitting device that can radiate the infrared light, infrared led strip in the working process of the parameters are not allowed to exceed the limit value, so when using ir led strip should pay attention to the parameters , not free to replace. In addition, it can not arbitrarily change the limiting current resistor of infrared led strip.

The following is used to explain about problems of the emission intensity and emission angle:
 

1. Launch angle θ1/2： in the luminous (or radiant) intensity distribution graph(angular displacement), luminous (or radiant)is greater than half the maximum intensity，and form a angle. in here we need to know the following points: the same two wafers launch tube, 2θ1 / 2 more bigger, then Iv smaller.holder into colloidal deeper ,angle is larger.; There are many effects of emission angle factors that the support pipe bowl size and depth, the mould R angle size and the wafer size height etc..

A significant advantage in LED

LEDs are increasingly popular at the moment,, human have used this Light Technology for more than Many years now.From the start of the invention of practical value incandescent inventing successfully byEdisonin 1879, human have entered into the era of electrification. After 100 years, the incandescent technical is improving, in the meanwhile, other technical means of lights are also used, such as the use of gas discharge fluorescent lamp and LED light using semiconductor technology.

Well, LED lights Why so popular these days?

,LED lights so Popular.the LED is becoming a preferred light source for much more than simple indicators. In fact, todayGeneral Electric (GE), clever lighting technical team responsible for R & D center in The government, told reporters that the traditional incandescent light efficiency is only 10 lumens / watt,high power led module can reach 70 to 80 lumens / watt, LED lights than incandescent light efficiency high, more energy-efficient. Service life, LED lights generally can reach more than 25,000 hours, 20 times more than the traditional incandescent lamp.

In addition, LED lights can also depending on the application, design into different shapes and dimensions, which is also incandescent not have the advantage.

Incandescent excessive energy consumption, starting in 2008, Our government launched the “Green Lighting” project, outdoor led lighting vigorously promote the use of energy-saving technology fluorescent lamp that is energy-saving lamps.

However, energy-saving lamps contain mercury and other harmful elements(energy-saving lamps can only reduce the mercury content, and it is impossible to completely eliminate mercury.), but a serious pollution impact on the environment. It is understood that, for every 1 mg of mercury, 360 tons of water pollution. Mercury content of each energy-saving lamps in about 3 to 5 mg, as of 2011, The government’s number of accumulated through financial subsidies to promote energy-saving lamps in more than 500 million. led outdoor lighting  Our current recycling system is not sound, improper disposal of hundreds of millions of energy-saving lamps, its the pollution consequences will be quite terrible.

LED CHROMATOGRAPHY IS CONSECUTIVE, ISN’T IT?

 

This answer is No. LED light-emitting device made of a single wavelength or mixed wavelength spectrum.In fact,It is actually a band of light,
we has been measured with a spectrometer.the Liquid or solid material inspired by high temperature, emit light of various wavelengths, such as incandescent light, sunlight and hot iron electrode various wavelengths are emitted continuous spectrum.This spectrum is formed by the hot solids  ,liquids or high pressure gases

Follows we think the shape means As shown in the spectrum of a LED,now ,Most of led was used blue light(centered band at 460 nm)
chip and yellow light phosphor composition a superposition of continuous spectrum:

there are several LED, for example, traffic lights, each LED particleis only one color,the composition seen one as linear, emission of light must be in here region;
The other oneis a three-color LED(it contains the RGB three colors ).we could think that it is line spectrum, but there are still several or tens of nanometers in width) mixed spectra are as follows:
The effect—–You see that the white LED is made of blue + Yellow 2 or R+G+B3 kinds of take out .

PAPER MONEY TEST

 

In Generally,Can checking up Paper money for under 410 nm of Violet LED. But every one should know that different ultra-violet are different Result. where is the pathos?

The detection of fluorescence reflection of the color difference are their main factor. The violet led was “gray white fluorescent” for over 380nm uv led strip(or equal to  400nm). it under 400nm lower(reflection fluorescence color tends to the “golden” low in 400nm)visual effect is more obvious, lower the band is getting higher price. So Detection equipment wavelengths of Violet both have 380~410nm in town.Violet LED around the Paper money as follows; major in currencies such aspound, US dollar, euro, franc used 360-380nm Violet LED, 365nm effect best in generally .pound, dollar, euro, and franc able to detection and 390nm or above the 390nm is no reflection fluorescence,380~390nm very weak. so they looks unfit for detection duty.

THE ADVANTAGES AND DISADVANTAGES OF OZONE ULTRAVIOLET LIGHT STRIP DISINFECTION

 

The advantages and disadvantages of ozone ultraviolet light stripdisinfection

UV led strip Will produce a 185nm wavelength of ultraviolet light, this wavelength of ultraviolet light can be outside air O2 into O 3(ozone), ozone is a active molecules, ozone can do Chemical reaction easily with other molecules.causing furtherdecomposition and converted into oxygen, to get purpose that update of fresh air & deodorant sterilization.Because of the need of application, there are many kinds of uv products, such as low ozone (no ozone), ozone, high ozone, and so on.in Generally there are staff of the action,does not recommend the use of ozone ultraviolet light disinfection,Breathe in the oxygen (Contained ozone of air)，causing the body’s oxygen deficiency, the occurrence of dizziness, nausea, the impact of health.

WHAT IS THE APPLICATION OF ULTRAVIOLET UV LAMP?

 

What is the application of ultraviolet UV lamp?
UV lamps are widely used in the fields of LCD, PCB, electronics, printing, plastics, wood, shoes, glass, craft and so on.
1, spray: In general cell phone shell coating, cosmetic case, MP3 small appliance shell and other plastic spray companies also need it!Casing spraying with uv printing both industry requirements  it’s not the same when give it the works(look at it products and equipment),
2, printing: silk screen printing, offset printing, 5-color printing mostly use UV lamp drying and curing UV ink.
3, shoes: use of ultraviolet irradiation of the soles’ material,
So that makes two of the adhesive rubber soles and uppers was better than nature.
4, wood: only the surface of the UV paint coating curing. Because UV paint (light oil or varnish, etc.)has good performance: such as wear resistance, acid and alkali resistance, weather resistance, etc.
5, PCB industry: PCB is a circuit board, UV lamp for circuit board printing, In general use METAL (metal halide lamp), there is also a kind of exposure lamp( also belongs to metal halide lamp), when PCB production, for the exposure of developing, in general use in circuit board company. There be an important Application: exposure of Solder Mask with uv led strip.6, LCD industry: Display of LCD Has adopted low pressure cool UV lamp, and curing with the lamp is not the same, but all belong to the UV lamp, use is not the same.
7, craft: as long as the use of UV on the surface of the oil processing, can be used in ultraviolet light.
8, uv automatic coating line: electrostatic dust gun is used in pre-treatment project, or electrostatic dust stick to deal with.

DISINFECTION WITH UV LED STRIP

 

Disinfection with UV LED strip
People was close to that bacteria and viruses everyday routine. Therefore, to develop good health habits. it’s import thing that regular disinfection。Howerver, people have not the conditions that bring the high pressure steam or ethylene oxide on anytime.but common disinfectant wipes, and so disinfectant of warm water is very unreliable ( for all kinds of microorganisms).LED UVC sterilization, real-time and high efficient, in 2 minutes to reach 99.9% of the sterilization rate, and cold cathode lamp need 6-8 minutes.

*The  ultravilet（www.ledlightmake.com/infrared-ultraviolet-led-strip-c-80_92） LED passed the EU RoHS environmental protection certification, does not contain harmful gas emission and common heavy metal packaging technology

Quality, such as mercury, cadmium, lead, bromine and other substances.

*The physical sterilization, no pollution, no smell, no residue, no toxic side effect.

*LED – very low energy consumption, save battery consumption, compared with the traditional cold cathode lamp, energy saving 80%.

*The switch (above 105Hz frequency modulation), instant start, adjustable lighting, which makes deep UV led the actual service life is much longer than that of mercury lamp and save more battery, easy to carry.

*The high brightness, the effective is five hundred times to thousands of times than mercury lamp unit area output band.

WHY ARE THERE DIFFERENT COLORS FOR LED?

 

A lot people need a white light source when Development of LED project. Development of white LED in 1998. This LED is made by a GaN chip and yttrium aluminum garnet (YAG) package together. GaN chip as blue (p=465nm, Wd=30nm) lightl, high temperature sintering made of YAG containing Ce3+ phosphor emitting yellow light emission  by this blue light, peak 550nm.Blue LED substrate is mounted in the reflective cavity bowl, covered with a thin layer of resin mixed with YAG, about 200-500nm. The blue part of the LED substrate is absorbed by the phosphor,and the other part is mixed with the yellow light can geted white.adjust the thickness of the phosphor layer and changing the YAG phosphor chemical composition of the phosphor layer can the 3500 – 10000 K color temperature colored white.  Import thing is the medium that between the two poles of the light-emitting diode, powder, and called the phosphor, different media emit different colors of light.

THE SUN’S ULTRAVIOLET

Hang my clothes lay in the sun,  the use of which the ultraviolet disinfection. Everybody knows that. Well done. Hoo-rah.  But I still have doubts that the ultraviolet disinfection is probably a little andfiniteBut in recent days of an experiment, let me taste of the power of ultraviolet rays in sunlight! (Of course, the experiment is not to measure ultraviolet).
Recently, we manufactured it —–PCB with photographic blue oil, To the exposure, I do not have use UV LED strip. When exposure, I no ultraviolet light – follow www.ledlightmake.com  production of information, just need a few minutes with 8W UV LED to exposure. Other Information also mentioned that if user no have ultraviolet LED light, you can use sunlight or energy-saving lamp to exposure. First I chose to use 12-watt energy-saving lamps to exposure. after 5 minutes, but no effect.Then we had to choose sunlight exposure. The first time to use Sunlight  no experience, the sun for 5 minutes, the exposure is over, 2 minutes is the best time of exposure for PCB.I can’t believe 2 minutes did this. We  would think that PCB stayed there for half an hour.

IS THAT TRUE? CAN ULTRAVIOLET LIGHT MAKE THAT OZONE?

About Ozone we knows that it is atmosphere‘live be short of Ozone（the atmosphere is both indispensable (ozone layer)），and it is also a kind of environmental pollutants, some people said oxygen can produce ozone in the ultraviolet irradiation, does that mean to the face of the earth。In here have enough oxygen, The oxygen would be have reacted Above.
thus ozone is an air pollutant, so that the ozone is harmful, and some people say that ozone can absorb ultraviolet light, The conclusions that It was just supposed to be the high-altitude ozone layer(the Earth’s surface from the 14- 25 km altitude).ozone layer, the ozone layer in the earth’s outer space, the sun’s ultraviolet radiation Creating a ozone layer in the earth  Outer space.

Until the atmosphere is stable,the ozone layer is security blanket for people live. in normal circumstances . The ozone layer is stable; it is always to protect people from ultraviolet rays.So, “ozone can absorb ultraviolet rays, ultraviolet Produce ozone” is not contradictory, but these two reactions occur in different position in the atmosphere, There is no relationship between the two.

WHY ULTRAVIOLET BE ABSORBED INTO THE OZONE?

Molecular absorption of electromagnetic wave, from a kind of physical phenomenon known as “resonance” .For example, we used to say don’t Marchwhen a large force across the bridge.This is afraid of thepace of vibration and vibration bridge together, (vibration always exists objectively, just some weak so it is difficult for us to feel, but the instrument can measure.)then “overlay”.Load increases  bridge vibration cause landslides. This is a common “resonance” phenomenon.

Similarly, there is also a “vibration” of a different kind of energy levels in molecules inside,  equal to the energy of two different energy level difference when Externally added energy .the molecules will absorb the Externally added energy , which is the “resonance”  of atomic molecular level.Ozone can absorb ultraviolet light, which is due to the molecular structure that it can be Produce the “resonance” with the ultraviolet radiation(within a certain range).ozone be skilled in, just absorb specific part. However, it absorbs part happens could lead to skin cancer, that means a lot coming from “murderer”, We think it exists for many kinds of molecules. The mean,  just different for absorbing electromagnetic wave.

WOULD THE UV CURING LAMP AFFECT HUMAN HEALTH?

In the past a long time, people’s awareness of UV is vague,Dangerous, even harmful. Even the sunlight is dangerous to them!They does not know that there is a beneficial side of ultraviolet radiation on the human body. can help bone growth
First, Medium wave of ultraviolet radiation,can make the deoxy cholesterol into vitamin D in skin. vitamin D enhances the absorption of calcium and phosphorus in the body,growth of children More contact with sun,more activities on outdoors.help prevent rickets.Recently, office’workers in the incidence of rickets has increased, the reason is * closed working environment
*they’s almost con’t touch the sun All day.

Secondly, different wavelength UV-A, UV-B ultraviolet radiation can treat rheumatoid arthritis, lupus, psoriasis, scleroderma, vitiligo, pityriasis rosea and cutaneous T cell lymphoma and skin diseases. But studies suggest a link to  lupus erythematosus shows that patients treated with ultraviolet radiation can significantly reduce the symptoms. and with the extension of treatment time, the effectiveness of the treatment continues to increase.

Again, UV Can also make the microbial cell nucleic acid and protein puree chemical change, to kill microorganisms, uv led strip were conducting an
Sterilization on air, water and polluted surface.

In summary, the three bands of A, B and C have a qualitative damage to the surface of the biological. The most effective band of the three bands is C band, and the wavelength is 253nm. The bactericidal activity of 7Nm was the strongest.

WHY ARE THERE DIFFERENT COLORS FOR LED?

A lot people need a white light source when Development of LED project. Development of white LED in 1998. This LED is made by a GaN chip and yttrium aluminum garnet (YAG) package together. GaN chip as blue (p=465nm, Wd=30nm) lightl, high temperature sintering made of YAG containing Ce3+ phosphor emitting yellow light emission  by this blue light, peak 550nm.Blue LED substrate is mounted in the reflective cavity bowl, covered with a thin layer of resin mixed with YAG, about 200-500nm. The blue part of the LED substrate is absorbed by the phosphor,and the other part is mixed with the yellow light can geted white.adjust the thickness of the phosphor layer and changing the YAG phosphor chemical composition of the phosphor layer can the 3500 – 10000 K color temperature colored white.  Import thing is the medium that between the two poles of the light-emitting diode, powder, and called the phosphor, different media emit different colors of light.