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..