From the perspective of atomic physics theory, microscopically, matter is in a state of electrical equilibrium when it is electrically neutral. Due to the gains and losses caused by electronic contact with different substances, matter loses electrical balance and generates static electricity. . In recent years, the domestic LED display production technology has gradually matured, with a wide range of applications, and is becoming popular. However, most LED display manufacturers do not yet have the true ability to produce such products, which brings safety hazards to LED display products and even affects the entire market. Static electricity is one of them. So, why does the LED display produce static electricity? What harm does it cause to the production of LED display screens? This article will explain in detail.

1. The cause of static electricity.

According to the theory of atomic physics, microscopically, a substance is in a state of electrical equilibrium when it is electrically neutral. Due to the gain and loss of electrons generated by electronic contact in different substances, the substance loses its electrical balance and generates static electricity.

The macroscopic reasons are: friction between objects generates heat, which stimulates electron transfer; contact and separation between objects produce electron transfer; electromagnetic induction causes uneven charge distribution on the surface of the object; the combined effect of friction and electromagnetic induction.

Electrostatic voltage is generated by different kinds of substances contacting and isolating each other. This effect is known as triboelectric electrification, and the voltage generated depends on the characteristics of the materials rubbing against each other. Because in the actual production process, the LED display screen is mainly caused by direct and indirect contact between the human body and related components to generate static electricity. Therefore, some targeted anti-static measures can be made according to the characteristics of the industry. Such as wearing anti-static clothes and anti-static shoes.

2. Static electricity is harmful in the LED display production process.

If you ignore the anti-static problem in any part of the production, it will cause the malfunction or even the damage of the electronic equipment.

If the semiconductor device is placed alone or in a circuit, even if it is not powered on, it will cause permanent damage to the device due to static electricity. As we all know, LED is a semiconductor product. If the voltage between two or more pins of the LED exceeds the breakdown strength of the component medium, the component will be damaged. The thinner the oxide, the higher the sensitivity of LEDs and driver ICs to static electricity, such as insufficient solder filling and quality problems of the solder itself, which will cause serious leakage and cause serious damage.

3. Because the junction temperature exceeds the melting point of semiconductor silicon (1415°C). Electrostatic pulse energy can generate local heating, which can lead to direct breakdown of the lamp. This kind of failure occurs even when the voltage is lower than the breakdown voltage of the medium. The LED display screen is a diode composed of a PN junction, and the breakdown between the emitter and the base will cause the current gain to drop sharply. After the LED display itself or the various ICs in the drive circuit are affected by static electricity, functional damage may not occur immediately. These potentially damaged components usually only appear during use, so the impact on the life of the display is fatal of.