How to prevent static electricity on LED display

  Many friends who are new to LED display are curious about why they are required to wear shoe covers, anti-static rings, anti-static clothing and other protective equipment when visiting many LED display workshops. To understand this issue, we need to talk about the knowledge related to anti-static protection in the production and transportation of LED display; many LED display screens have dead lights or are not lit, mostly due to static electricity.

　　The source of static electricity during the production of LED displays

　　1. Objects and materials

　　2. Floor, work desk and chair

　　3. Work clothes and packaging containers;

　　4. Painted or waxed surfaces, organic and fiberglass materials.

　　5. Cement floors, painted or waxed floors, plastic tiles or floor coverings.

　　6. Chemical fiber work clothes, non-conductive work shoes, and clean cotton work clothes.

　　7. Plastics, packaging boxes, boxes, bags, trays, foam plastic pads.

　　The harm of static electricity in the production process of LED display screens If anti-static is ignored in any link of production, it will cause electronic equipment to malfunction or even damage it. When semiconductor devices are placed alone or loaded into a circuit, even if there is no power, static electricity may cause permanent damage to these devices. As we all know, LEDs are semiconductor products. If the voltage between two or more pins of an LED exceeds the breakdown strength of the component medium, it will damage the component. The thinner the oxide layer, the more sensitive the LED and driver IC are to static electricity. For example, if the solder is not full, the quality of the solder itself is problematic, etc., serious leakage paths will be generated, 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 heating, thus directly breaking down the lamp and IC. This failure can occur even if the voltage is lower than the breakdown voltage of the medium. A typical example is that LED is a diode composed of PN junctions, and the breakdown between the emitter and the base will cause a sharp decrease in 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 only show up during use, so they are fatal to the life of LED products.

　　The production process of LED display is a very rigorous and meticulous process, and every link cannot be overlooked. The electrostatic protection of the display is also an important part of the production of LED display. At present, the industry's understanding of electrostatic protection is not deep enough, and it cannot meet the needs of professional LED display production. More professionals are needed to continue research and discuss together.

　　How to prevent static electricity in LED display production:

　　1) Provide electrostatic knowledge and related technology training to personnel using electrostatic sensitive circuits.

　　2) Establish an anti-static work area, use anti-static floors, anti-static workbenches, anti-static grounding leads and anti-static equipment in the area, and control the relative humidity above 40.

　　3) The harm caused by static electricity to electronic equipment may occur anywhere from the manufacturer to the field equipment. The harm is caused by insufficient and effective training and equipment operation failure. LED is a device sensitive to static electricity. INGAN chips are usually considered to be "first" susceptible to interference. And ALINGAPLEDSSHI "second" or better.

　　4) ESD damaged devices can show dim, fuzzy, off, short or low VF or VR. ESD damaged devices should not be confused with electronic overstress, such as: due to incorrect current design or drive, chip hanging, wire shield grounding or packaging, or general environmental induced stress.

　　5) ESD safety and control procedures: Most electronic and electro-optical companies have very similar ESD and have successfully implemented ESD control, manipulation and master procedures for all equipment. These procedures have been used to detect quality effects of ESD instruments since ancient times. ISO-9000 certification also includes it in normal control procedures.