The harm of static electricity to LED display screen and its solution

Time:2018-11-29 Views:131

In the process of producing LED display screen, the electrostatic radiation generated will cause the failure of display screen and damage of parts. We cannot ignore the factors causing electrostatic in any link of production.Delenser will explain the harm of static electricity to LED display screen and the solution.

First of all, we need to understand why static electricity is generated in the production process, because electrostatic voltage is generated by the contact and separation of different kinds of substances, this effect is known as friction electrification.LED display screen in the actual production process is mainly the human body and related components of direct contact or indirect contact, so it will lead to the generation of static electricity.

Secondly, we need to know the harm of static electricity generated in the production process to the display screen:

1. When semiconductor devices are placed or loaded into circuits independently, static electricity may cause permanent damage to them even if no power is added.LED is a semiconductor product. If the voltage between two or more pins of LED exceeds the breakdown strength of the component medium, the component will be damaged.

2. The thinner the oxide layer, the greater the sensitivity of LED and drive IC to static electricity.

3, electrostatic pulse energy can generate local heat, so there is a direct breakdown of the lamp tube and IC failure.When this happens, it can be a deadly factor in the life of LED displays.

Finally, we need to know the solutions:

First, grounding, grounding is releasing static electricity through a wire connected to the ground directly, which is the most direct the most effective measures to solve the electrostatic, with usually use the method of grounding conductors, we require artificial using the tools of grounding, grounding anti-static gloves, etc., so in the process of production, requirement worker must wear ground static gloves, especially in the feet, plug-in, after debugging and welding procedure, and inspection, quality personnel must be at least once every two hours to do gloves static test, test record.

Second, buried of ground of electrostatic resistance, anti-static ground wire must be buried in the first 30 metres away from buildings and equipment, the second in order to guarantee the safety and reliability of the ground, should to little more than three root ground earthing, finally pit with a moderate amount of charcoal powder and industrial salt, in order to increase the soil electrical conductivity, the landfill after measure must be using grounding resistance tester.