1.uv glue curing light emitting mechanism: the terminal voltage of PN junction formed a barrier. When the voltage of the positive bias is added, most of the carriers in the P and N regions are diffused each other. As the electron mobility is much larger than the hole mobility, a large number of electrons will be distributed to the P region, which will form a small amount of carrier injection in the P region. These electrons are combined with holes in the valence band, and the energy produced is released in the form of light energy. This is the way PN junction is emitting light.

2.UVLED luminescence efficiency: usually called the external quantum efficiency of the component, which is the product of the internal quantum efficiency of the component and the extraction efficiency of the components. The so-called internal quantum efficiency components are actually the electro-optical conversion efficiency of the components themselves, mainly related to the characteristics of the components themselves, such as components, materials, defects and impurities, the components of the base and the components of crystal structure. The extraction efficiency of components refers to the number of photons produced in the component, which can be measured outside the component after the absorption, refraction and reflection of the component itself. Therefore, the factors of extraction efficiency include the absorption of component materials, the geometric structure of components, the refractive index difference between components and packaging materials, and the scattering characteristics of component structure. The product of the internal quantum efficiency of the component and the extraction efficiency of the component is the luminous effect of the whole component, that is, the external quantum efficiency of the component. The key element is to improve the early development of the internal quantum efficiency by increasing the blocking rate is the main means of crystal quality and the changes of crystal structure, which is not easy to put the electric energy into heat energy, thereby indirectly improve the luminous efficiency of the UVLED, so as to obtain the internal quantum efficiency of 70% can be, but the internal quantum efficiency theory is almost close to the theory limit. Under such circumstances, it is impossible to improve the total luminous volume by improving the internal quantum efficiency of components. Therefore, improving the extraction efficiency of components has become an important research topic. The main methods are: the change of grain shape, the structure of TIP and the technology of surface roughness.

3, the characteristics of UV glue curing lamp: current controller. The load characteristic of UI curve is similar to PN junction. It is a slight change of tiny voltage which can lead to a great change in forward current (indicator level), and a reverse leakage current is very small, which is a reverse breakdown voltage. In actual use, it should be chosen. The UVLED forward voltage decreases with the temperature and has a negative temperature coefficient. UVLED consumes power and is partly converted to light energy, which is what we need. The rest is converted into heat, which makes the temperature rise. The heat emitted can be expressed as.

4, the optical properties of UVLED: UVLED provides a FWHM of monochromatic light, because the semiconductor energy gap decreases with the increase of temperature, the emission peak wavelength increases with the increase of temperature, the spectral redshift, the temperature coefficient is 2 ~ + 3 /. UVLED brightness L and forward current. The current is increased and the brightness and brightness are also increased approximately. In addition, the luminance and brightness are also related to the ambient temperature. When the temperature of the environment is high, the composite efficiency is reduced and the luminescence intensity is reduced.

5.uv glue curing lamp heat dissipation characteristics: the current is small, LED temperature rise is not obvious. If the temperature of the environment is high, the main wavelength will be redshifted, the brightness will decrease, and the uniformity and uniformity will be reduced. In particular, the temperature rise of the large screen has a greater impact on the reliability and stability of LED. So cooling design is the key.

6. UVLED life: long working hours can lead to aging, especially for high power light, the problem is more serious. When the service life is measured, the damage degree of the lamp can only be reduced at the end of UVLED life. The life expectancy of UVLED LED should be specified by the percentage of light attenuation, for example, 35%, which makes it more meaningful.

7. high power: the main consideration of heat dissipation and luminescence. In the heat of heat, the copper base heat sink is used to connect the aluminum base radiators, which can be connected by the welding between the grain and the heat lining. UV glue curing lamp this kind of heat dissipation is very good