LED electronic display is the most popular display device in the market. The application and maintenance of display screens are required for the operators. We all put our sights on the power supply, display connection equipment, LED lights, etc., and neglected the knowledge of capacitors. Here we will give a brief introduction to the knowledge of capacitors. A capacitor is a container that can store electric charge. It is made up of two pieces of metal that are close together and separated by insulating material. According to the insulation material, various capacitors can be made. Such as: mica, porcelain, paper, electrolytic capacitors. Structurally, it is divided into fixed capacitors and variable capacitors. Capacitors have infinite DC resistance, that is, capacitors have a DC blocking effect. The resistance of a capacitor to an alternating current is affected by the frequency of the alternating current, that is, a capacitor having the same capacity exhibits different capacitive reactance to alternating current having different frequencies. Why do these phenomena occur? This is because the capacitor is operated by its charge and discharge function, and the power switch s is not closed. The two plates of a capacitor and other ordinary metal plates are uncharged. When the switch S is closed, the free electrons on the positive plate of the capacitor are attracted by the power supply and pushed onto the negative plate. Due to the insulating material between the two plates of the capacitor, free electrons running from the positive plate accumulate on the negative plate. The positive plate will be positively charged due to the reduction of electrons, and the negative plate will be negatively charged due to the gradual increase of electrons. There is a potential difference between the two plates of the capacitor. When this potential difference is equal to the supply voltage, the capacitor stops charging. If the power is cut off at this time, the capacitor can still maintain the charging voltage. For a charged capacitor, if we connect the two plates with a wire, due to the potential difference between the two plates, the electrons will pass through the wire and return to the positive plate until the potential difference between the two plates is zero. The capacitor returns to its neutral neutral state and there is no current in the wire. The frequency of the alternating current applied to the two plates of the capacitor is high, the number of charging and discharging of the capacitor increases, and the charging and discharging current is also enhanced; that is, the blocking effect of the capacitor on the high frequency alternating current is reduced, that is, the capacitive reactance is small, and vice versa. Capacitors have large capacitive reactance to low frequency alternating currents. For the same frequency AC power. The larger the capacity of the capacitor, the smaller the capacitive reactance, and the smaller the capacity, the larger the capacitive reactance. The performance of the capacitor directly affects the overall quality of the display. Therefore, personnel engaged in professional maintenance need to master certain knowledge of capacitance in order to better apply the display screen.
Musk Xylene was once the most widely used of the "nitro-musks", but its use has declined sharply since the mid-1980s due to safety and environmental concerns,and musk xylene is a useful example of the lowest level of such risks which need to be taken into account.
Musk xylene has been used in a wide variety of consumer products since the early 1900s, usually in very small quantities.
Raw Musk Xylol,Raw Musk Xylol Allergy,Raw Musk Xylol Kit,Raw Musk Xylol For Sale Gan Su Original Flavor Co.,ltd , https://www.futureperfume.com
