Compared with UV discharge lamps, UV- LEDs have many advantages: no mercury, no environmental pollution, no health risks; long life; low radiation attenuation; easy to control and adjust. Therefore, UV-LED has broad application prospects and can be used in many fields such as curing, detection, medical treatment, beauty, sterilization, disinfection, communication, and the like.
Medical (phototherapy)
Inada et al. irradiated Jurkat tumor cells with UV LEDs (365 nm). By comparison, the number of apoptosis and necrosis after irradiation with UV LEDs and conventional light source systems is approximately the same. This proves that UV LED has the potential and possibility as a new light source for phototherapy, which can replace the traditional UV fluorescent lamp with heavy system, short life and high energy consumption.
Fluorescence detection (biological detection)
For the continuous fluorescence UV excitation in fluorescence detection, it is difficult to provide periodic response, unable to form a clear fluorescence analysis image, and the fluorescence intensity of organic matter is attenuated with exposure time. Huang et al. used an adjustable pulse control module to realize organic dyes. Fluorescence test of BL-ORT. The structure of the system is shown in the figure below. The period of the pulse control module can be adjusted from 1 to 1 000 ms to improve the stability of the power supply and the uniformity of the radiation of the light source. The led module uses six 3W 405 nm UV-LEDs and six 3 W 375 nm UV-LEDs for fluorescence detection and three white LEDs to provide general illumination of the visible image. When the BL-ORT is excited by pulsed UV-LED light with a period of 30 ms, most of the complete fluorescence data is obtained. Moreover, the energy consumption of such a pulsed excitation source can be reduced to 50%. The system can be used for fluorescence detection in biochemical reactions, security, industrial, agricultural and other fields.
Sewage treatment (sterilization)
Chevremont et al. evaluated the effects of UV-A or UV-C LEDs and their combination on the treatment of municipal wastewater using bacteria and chemical indicators in wastewater. The experiment monitored the residual rate of excreta bio-indicators in urban sewage and the oxidation rate of creatinine and phenol. The results show that the combination of UV-A and UV-C can be used in combination with a UV-LED alone. The content of microorganisms in the wastewater is effectively reduced, and 37% of creatinine and phenol can be oxidized, which is comparable to the effect of using a photocatalyst such as TiO2. This method can effectively recycle urban wastewater, which is of great significance to many countries with water scarcity.
Fuse refers to an electric appliance that, when the current exceeds the specified value, melts the fuse and disconnects the circuit with the heat generated by itself.When the current exceeds the specified value for a period of time, the fuse melts and disconnects the circuit with the heat generated by the fuse itself.A current protector made from this principle.The fuse is widely used in high and low voltage power distribution system and control system as well as power equipment.
Ferrite is a metal oxide with ferrous magnetism.As far as electrical properties are concerned, the resistivity of ferrite is much larger than that of single metal or alloy magnetic materials, and it has higher dielectric properties.Ferrite magnetic energy also shows high permeability at high frequencies.As a result, ferrite has become a non-metallic magnetic material widely used in the field of high frequency and weak current.Due to the low ferrite magnetic energy stored in the unit volume, saturated magnetic induction strength (Bs) and low (usually only pure iron 1/3 ~ 1/5), and thus limits its higher requirements in the low-frequency magnetic energy density in the field of high voltage and high power applications.
Semiconductor Fuse and Ferrite
Semiconductor Fuse, Fuse Cutout, Protection Fuse, Square Fuse, Fuse Link, Ceramic Fuse, Fuse Box, Fuse Resistors
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