At present, LED light pollution is generally classified into three categories in the world, namely white light pollution, artificial daylight and color light pollution. Recently, the industry has frequently exposed the problem of LED light damage. It has been suggested that high-brightness and glare LED combination flashing pattern advertisements have an impact on driving safety.
A research project on light pollution also indicates that LEDs inhibit high levels of melatonin and may affect human health. Vegetables that mature in three months, using LED light energy, actually reduced the growth time by 65%, and may affect or even harm the human body after consumption.
It is understood that in Europe, America and Japan, the problem of light pollution has already attracted people's attention. The United States has also established the International Dark Night Sky Association to fight light pollution. In China, there are still cases in which the government spends huge sums of money to paint night scenes with various kinds of lights. Some netizens expressed dissatisfaction with this. "One side is to promote high-profile energy conservation and environmental protection, and to implement energy saving and reduction for ordinary people and small and medium-sized enterprises. The indicators are on the one hand, and the neon lights are flourishing and flourishing. Whoever spends the money does not say that it is only for the state officials to set fire to the people to light the lights."
"Striking away from the stars, trying to illuminate the sky with lights is a violent city lighting." Some netizens said that the lights are used to illuminate people, not to use the sky. It wastes resources and creates nuisance. While vigorously developing the lighting industry, light pollution should also receive the attention of all sectors of society and lighting workers, especially the current investment in the frenetic LED industry. Due to the existence of many blind production situations, the problem of light pollution caused by unreasonable products should be more Receive attention.
It can be seen that while vigorously developing the lighting industry, light pollution should also receive the attention of all sectors of society and lighting workers, especially the LED industry that is currently investing in enthusiasm. Due to the existence of many blind production, the products are designed with unreasonable products. The issue of light pollution should be given more attention.
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
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