[Parameters] Several Key Parameters of UVLED Lamp Beads

UVLED is a semiconductor luminous device. Like commonly used lighting LEDs, its core is PN knot. The main emitting mechanism is that when the PN knot is added with a positive voltage, the potential of the PN knot will decrease. At this time, the electrons in the N area spread to the P area, and the cave in the P area spreads to the N area, but the number of the former is far from the latter than the latter. It is much bigger, so the electrons will be compounded in large quantities, and the energy generated by the composite is released in the form of light. UVLED has the following key parameters: 1. The wavelength UVLED has a single peak wavelength, the UVA band is mainly 365nm, 385nm, 395nm, etc. The following is a 365nm wavelength chart. 365nm is just its peak wavelength. Bandwidth, about 360nm-370nm. The wavelength of UVLED will also be drifted by other factors during luminous process. It is mainly two factors: current and temperature. As shown in the figure, we can see that with the increase in the current and temperature, the wavelength will gradually become larger. Therefore, when designing the system, we must fully consider the current value and the working temperature of the beads at the time of work. Generally, we work near the peak wavelength. 2. Optical power (irradiated strength) Optical power refers to the light of the lamp beads. Different wavelengths are different due to the different efficiency of electro -light conversion. Generally, the shorter the wavelength is in the current technology, the lower the electro -optical conversion efficiency. The lower the time of time, the higher the other, the higher the UVA's LED is generally more luminous than that of the UVC LED. The following is the relationship between the optical power and current of a certain UVLED: 3. The meaning of VFVF is forward Voltage, that is, when the diode is fully driven, the diode itself PN knot is the IF. Voltage difference. When the VF of UVLED generally appears, when comparing the lamp beads with different wavelengths, UVA's lamp beads are generally 3.5V-3.8V, and UVC's lamp beads are generally 5V-7V. When the same manufacturer produces the same products, the VF generally manages the VF, so that the device application manufacturer will be classified and managed during the patch. The current adding to the lamp beads is not at the same time, and its VF also changes. Generally speaking, the larger the current, the larger the VF, as shown in the figure below: Tianhui's UVLED surface light source uses imported UVLED lamp beads, high -quality constant stream sources, excellent heat dissipation combined with excellent heat dissipation Design, with the advantages of compact structure, high reliability, and high stability. The products are well received by customers.