Many friends who are new to LED displays are curious why they are required to bring protective equipment such as shoe covers, static rings, and static clothing when visiting many LED display workshops. To understand this problem, it is necessary to mention the knowledge related to electrostatic protection during the production and transportation of LED displays; many LED displays have failure lights or do not light up, which is mostly caused by static electricity.
Sources of static electricity in LED display production process
1. Objects and materials
2. Floors, work tables and chairs
3. Work clothes and packaging containers;
4. Painted or waxed surfaces, organic and fiberglass materials.
5. Cement floor, painted or waxed floor, plastic floor tiles or floor leather.
6. Chemical fiber work clothes, non-conductive work shoes, clean cotton work clothes.
7. Plastic, packaging boxes, boxes, bags, trays, foam plastic liners.
The harm of static electricity in the production process of LED displays. If anti-static is ignored in any part of the production, it will cause electronic equipment to malfunction or even damage it. When semiconductor devices are placed alone or installed in a circuit, permanent damage to these devices may occur due to static electricity, even if power is not applied. 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 layer, the greater the sensitivity of the LED and driver IC to static electricity. For example, if the solder is not full, the solder itself has quality problems, etc., serious leakage paths will occur, causing devastating damage.
Another type of failure is caused when the temperature of the node exceeds the melting point of semiconductor silicon (1415°C). The pulse energy of static electricity can generate local heat, which can cause direct breakdown of lamps and ICs. This failure can occur even if the voltage is below the breakdown voltage of the dielectric. A typical example is that an LED is a diode composed of a PN junction. The breakdown between the emitter and the base will drastically reduce the current gain. After the LED 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 show up during use, so they have a great impact on the life of the LED product. is fatal.
The production process of LED display screen is a very rigorous and detailed process, and every link cannot be ignored. The electrostatic protection of display screens is also an important part of LED display production. At present, people in the industry do not have a deep enough understanding of electrostatic protection, let alone meet the needs of professional LED display production. More professionals are needed to continue to study and work together. discuss.
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