What is the cause of the LED display electrostatic generation? Electrostatic bring what harm to the production of LED display?

by:GKGD     2020-05-01
What is the cause of the full color LED display electrostatic generation? Electrostatic bring what harm to the production of LED display? In recent years, the LED display production technology in China is yet to mature, application field widely popularity and become a trend. But at present most of the manufacturers of LED display is not fully in the production of such products, real ability, thus brought the hidden danger to the full color LED display products, that affect the entire market. The causes of static electricity: from the microscopic said, according to the theory of atomic physics, electrical neutral substance in the electrical balance state, due to the different material electronic contact of gain and loss, the balance of material lost electricity, produce electrostatic phenomena. Tell from the macro, the reasons are: the object between the friction heat production, stimulate the electron transfer; Objects of the contact and separation between electron transfer; Electromagnetic induction cause unbalanced distribution of surface charge; The friction and the synthetical effects of the electromagnetic induction. Electrostatic voltage is made up of different kinds of material and touch each other and separation. This effect is known as triboelectrification, generated by the voltage depends on the mutual friction characteristics of the material itself. Due to the LED display in the actual production process mainly is the human body and the related components of direct contact and indirect contact with static electricity. So according to the characteristics of the industry, we can do some corresponding measures to prevent static electricity. Static electricity in the hazard in the process of producing full color LED display if any link in the production of ignore the anti-static, it will cause electronic equipment failure and even make it to further deteriorate. When the semiconductor devices placed separately or load circuit, even without electricity, due to electrostatic also may cause permanent damage of the device. If known, LED is a semiconductor products, LED the voltage between two or more stitches stitches over components dielectric breakdown strength, will cause damage to components. Oxide layer is thin, the LED and driver IC to electrostatic sensitivity is, the greater the for example of solder is not full, solder itself quality problems, and so on, will have serious leakage path, causing devastation. Another failure is due to the node temperature above the melting point of semiconductor silicon ( 1415℃) When. Electrostatic pulse energy can produce local war fever, hence breakdown tubes and IC failure directly. Even if the voltage is lower than the dielectric breakdown voltage, also can produce this kind of failure. A typical example is that the LED is composed of p-n junction diode breakdown between the emitter and the base current gain drastically reduced. LED by itself or in the drive circuit of each IC after affected by static electricity, or may not appear immediately functional damage, the potential damage of components in use process will usually appear, so are lethal effect on the life of the screen.
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