LED display production process in the cause of static electricity
Time:2019-01-08
Views:93
In recent years, the production technology of LED display screen in shenzhen is becoming mature in our country.However, at present, most LED display manufacturers in shenzhen are not fully capable of producing such products, which brings potential risks to LED display products in shenzhen and even affects the whole market.How to standardize the production, how to produce a real sense of low attenuation, long life of shenzhen LED display products?In this paper, the causes of the static electricity generated in the process of LED display production in shenzhen are discussed from the perspective of electrostatic protection.
From the microscopic point of view, according to the theory of atomic physics, when the electricity is neutral, the material is in the state of electric equilibrium.
Macroscopically, the reasons are as follows: friction between objects generates heat and stimulates electron transfer;Contact and separation between objects produce electron transfer;The uneven distribution of surface charge caused by electromagnetic induction;The combined effect of friction and electromagnetic induction.
Electrostatic voltage is produced by the contact and separation of different kinds of materials.This effect is known as triboelectrification, and the voltage produced depends on the nature of the material being rubbed against each other.In the actual production process of LED display screen in shenzhen, the direct contact and indirect contact between human body and relevant components mainly produce static electricity.So according to the characteristics of the industry we can do some targeted electrostatic preventive measures.
Electrostatic hazards in the production process of shenzhen LED display if any link in the production of anti-static neglect, it will cause electronic equipment failure or even damage.
When semiconductor devices are placed alone or loaded into a circuit, static electricity can cause permanent damage to these devices even if they are not energized.As we all know, LED is a semiconductor product. If the voltage between two or more pins of LED exceeds the breakdown strength of the component medium, it will cause damage to the component.The thinner the oxide layer, the LED and drive IC will be more sensitive to electrostatic, such as the solder is not full, solder quality problems, etc., will produce a serious leakage path, resulting in devastating damage.
Another failure is due to the node temperature exceeds semiconductor silicon melting point (1415 ℃).Electrostatic pulse energy can produce local heating, so there is a direct breakdown of the lamp and IC failure.This failure can occur even if the voltage is lower than the breakdown voltage of the medium.A typical example is that the LED is a diode composed of PN junction, and the breakdown between the emitter and the base electrode will sharply reduce the current gain.After the LED itself or IC in the drive circuit is affected by static electricity, functional damage may not occur immediately. These potentially damaged components are usually shown in the use process, so the impact on the life of shenzhen LED display is fatal.
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