1.Working UV LED low current thermal characteristics, LED temperature is not obvious. If the ambient temperature is high, the main wavelength of UV will be redder, the brightness will decrease and be even, but the consistency will be worse, especially the lattice. A large number of display temperature rise on the LED reliability, the stability of the greater impact. Therefore, thermal design is very important.

2.UV guide UV LED to long-term work will lead to light aging, especially for high power UV, the optical failure problem is more serious. When measuring life of UV, only the ultraviolet light source at the end of the life cycle is not enough to turn the light off, should be specified by the percentage of the UV LED light LED life,such as 35%, so it makes more sense.

3.High power UV LED encapsulation mainly considers heat and light. Cooling, copper based thermal lining, and then connecting to the aluminum base of the radiator, in the particle and the heat lining of tin plate welding as the connection, this cooling effect is better and cost-effective. On the light side, UV LED UV light source uses chip flip technology to increase the reflection of reflected light energy at the bottom and side. So you can get more efficient light.

4.UV LED spectrum ultraviolet LED light sources have released a relatively single spectrum to the current market to determine the basis of LED crystal materials, the more mainstream 365nm, 395nm.

5.Current control device of the UV LED electrical characteristics, load characteristics of PN junction and UI curve similar to small changes in the forward voltage, can lead to forward current (index), reserve leakage current, low breakdown voltage. With the increase of temperature, the UV conduction voltage decreases and the temperature coefficient is negative. UV guided energy consumption, partially converted to light energy, that’s what we need. The rest becomes hot, so the connection temperature goes up.