How do LED display manufacturers prevent static electricity
We all know that full-color outdoor LED display has good color performance in many fields of life. It has a good reputation for its convenient maintenance, energy and power saving, wind and pressure resistance, stable, reliable and applicable characteristics. As one of the outstanding representatives of LED display products, outdoor full-color LED display has become a charming highlight of smart city construction. However, outdoor full-color LED display is an electronic product after all, and there are many potential hazards, such as static electricity. If it is not protected in time, the service life of the display will be reduced. Let's take a look at how Shenzhen LED manufacturer Chengtong photoelectric prevents static electricity.
1. Electrostatic discharge failure: sudden failure and potential failure. More than 90% of electrostatic failure in the service environment is potential failure, which shows that the anti electric over stress ability of the circuit is weakened and the service life is shortened.
2. Electrostatic source: the electrostatic sources that affect the circuit mainly include human body, plastic products and relevant equipment and instruments, among which the electrostatic power from the use environment includes objects and materials; Floors, tables and chairs; Work clothes and packaging containers; Painted or waxed surfaces, organic and fiberglass materials; Cement floor, painted or waxed floor, plastic floor tile or floor leather; Chemical fiber work clothes, non-conductive work shoes, clean cotton work clothes; Plastics, packing boxes, boxes, bags, plates, foam plastic gaskets.
3. Transportation and packaging: during daily operation, ESD sensitive equipment shall always be stored in anti-static bags or containers. This includes inventory storage, transportation and WIP. Precautions during transportation include the consumption of motorcade, boxes or other equipment, such as conductive wheels or trailers, and the grounding of ESD equipment during transportation; LED display screen is the display product with the widest application range of large screen in the market at present. Because it is a high-end display product and the production cost is relatively high, the LED display screen manufacturer needs to carry out anti-static knowledge training for the company's employees, and the relative humidity is controlled above 40 to reduce the damage rate of LED display screen during transportation as much as possible.
4. Anti static measures: provide training on electrostatic knowledge and related technologies for personnel using electrostatic sensitive circuits; Establish an anti-static working area, use anti-static floor, anti-static workbench, anti-static grounding lead and anti-static appliances in this area, and control the relative humidity above 40; The harm caused by static electricity to electronic equipment may be released anywhere from the manufacturer to field equipment. The hazard is caused by insufficient and effective training and equipment operation failure. LED is a device sensitive to static electricity. InGaN chips are generally considered to be "first" susceptible to interference. Alingapledsshi is "second" or better; ESD damaged equipment can show dim, blurred, extinguished, short or low VF or VR. ESD damaged equipment shall not be confused with electronic overload, such as wrong current design or drive, chip hanging, wire shielding, grounding or packaging, or ordinary environmental induced pressure; ESD safety and control procedures: ESD of most electronic and electro-optical companies is very similar, and ESD control, manipulation and main procedures of all equipment have been successfully realized. These procedures have been used to detect the quality effect of instruments. ISO-9000 certification also lists it as a normal control procedure.
Warm tip: don't think that static electricity is just a small problem and don't pay attention to it. As the old saying goes, "thousands of miles of dike is destroyed by ant nests" and so on, it's too late to think of protection when there are really big problems.
