Shenzhen Lianchengfa Technology Co., Ltd.

Entering the autumn and winter seasons, the weather is becoming more and more dry, which is the season when static electricity is most likely to be generated. In a dry environment, the static electricity of the human body usually reaches several thousand volts or even tens of thousands of volts. Although electrostatic discharge (ESD) will not cause life danger to the human body, it can easily cause fatal damage to semiconductor products such as LED electronic screens. How to carry out anti-static work of led electronic screen in winter? What are the anti-static work of LED display? Next, the editor of Liancheng will take you to find out.

Static electricity is a kind of electrostatic charge. Static electricity is generally concentrated on the surface or surface of an object. The initial phase of an object is electrically neutral. When two objects are rubbed, the heat generated on the surface stimulates the movement of internal charges to accumulate on the surface of the object to generate static electricity. If it is a conductor, the charge flows easily and neutrality is restored quickly. So friction is primarily how insulators generate static electricity. The static power supply that affects the circuit mainly includes the human body, plastic products and related equipment. Static power from the environment of use includes objects and materials; floors, workbenches and chairs; packaging containers; painted or waxed surfaces; organic and fiberglass materials; concrete floors; painted or waxed floors; plastic floor tiles or floors Leather; work clothes; non-conductive work shoes; clean cotton work clothes; plastic, boxes, boxes, bags, trays, foam linings.

1. Prevention of Electrostatic Discharge (ESD)

To minimize the damage of static electricity to the LED display, manufacturers, distributors and customers are required to strictly implement the ESD20.20 standard during production, transportation and use. In production, the static electricity is directly discharged to the ground through the wire connection, which is the most direct and effective anti-static method.

(1)Static electricity prevention at the production end?

Conduct electrostatic knowledge and related skills training for personnel using electrostatic sensitive circuits. Establish an anti-static work area, use anti-static floors, anti-static workbenches, anti-static grounding wires and anti-static appliances in the area, and control the relative humidity above 40.

During the production process, workers are required to wear a grounded electrostatic wristband. Especially in the process of cutting feet, plug-in, debugging and post-soldering, and do a good job of supervision, the quality personnel must do an electrostatic test of the wristband at least once every two hours, and make a test record.

When welding, the electric soldering iron should use an anti-static low-voltage constant temperature soldering iron as much as possible, and maintain a good grounding. In the assembly process, use a low-voltage DC electric screwdriver (commonly known as an electric batch) with a grounding wire as much as possible. Ensure that the production pull table, glue filling table, aging rack, etc. are effectively grounded.

The production environment is required to be grounded with copper wires, such as floors, walls, and ceilings used in certain occasions, and anti-static materials should be used. In daily operation, LED display products should always be stored in anti-static bags or containers.

(2)Static electricity protection on the transport side

When transported, keep the delivery vehicle grounded, boxes or other equipment with conductive wheels or protracted connections.

When touching the LED screen product, keep the correct way of taking it, and do not directly touch the PCB board and the electronic components on it.

(3)Client electrostatic prevention

When installing the screen, customers and engineers also need to strictly follow the anti-static operation, and do not directly touch the central electronic components of the product without protection measures. When installing the steel structure of the screen, do a good job of grounding, and guide the static electricity of the screen to the ground.

2. The hazard of electrostatic discharge (ESD)

ESD (Electrostatic Discharge) often occurs in any link in the process of LED display production, transportation, installation, etc. Due to the irregular operation, the product is subjected to electrostatic breakdown, causing sudden and potential damage to the LED display product.

Sudden damage reduces product yield and increases business costs. Sudden damage refers to: the voltage between two or more pins of LED product components exceeds the breakdown strength of the component medium, resulting in serious damage to the components and loss of function. This kind of damage can usually be found in the quality inspection during the production process, and will not directly affect the customer's use, but if the manufacturer suffers from electrostatic interference for a long time, it will increase the production cost.

Potential damage affects the service life of the product and causes losses to customers. Potential damage accounts for a higher proportion of electrostatic discharge (ESD) damage, reaching more than 90%, and because the pulse energy of static electricity causes local heating of the lamp or IC, the breakdown of the lamp and IC is detected. cannot be found in. However, the product becomes unstable, and the phenomenon of dead lights appears one after another in the subsequent use of customers, which greatly affects the service life of the LED display and causes losses to customers.

Finally, only by mastering the correct anti-static knowledge can it help to improve the production efficiency and service life of led electronic screen products, and reduce the occurrence of safety accidents. The above is the content of the anti-static work of LED electronic screens in winter organized by Liancheng Xiaobian. Welcome to add and correct. LCF is a world-leading provider of LED display applications and solutions, as well as a national-level specialized, special, and new little giant enterprise. The main business covers "smart city", "cultural tourism business performance", "commercial display project", "content technology" four sections, with the world's leading automated production equipment and modern post-doctoral research laboratory and perfect sales and services team. Friends who want to buy LED display can also contact us, LCF LED display manufacturer, a big country brand, trustworthy!