LED screen display acceptance criteria

With the development of LED display screen and the increasing demand of application, LED display screen manufacturers are springing up, constantly promoting their own brands and products. Customers do not know how to choose from these manufacturers. When purchasing LED screen, it is better to find a manufacturer with a certain scale and a certain popularity in the industry. In the acceptance process, it is more important to ensure that the quality is no problem, For those who don’t understand the industry standard, how to accept it?
Shenzhen LED display factory teaches you how to check the screen

（1） Appearance inspection: general visual inspection and hand feel can initially see whether there is a problem with the LED screen.
（2） Appearance of silk screen printing: the content of silk screen printing should be clear, complete, uniform in color, without burr, defect, tailing and pollution; The specific content, location, pattern and font size of all silk screen printing are described in detail by the corresponding drawings. The manufacturer shall screen in strict accordance with the design requirements of the drawings.
（3） Screen picture: whether the color is consistent, or there is color deviation phenomenon, or even not bright phenomenon.
（4） Coating adhesion: there should be no peeling phenomenon.
（6） The color is consistent with that of the sample plate (normal vision, no obvious color difference observed under natural light or fluorescent lamp), and the same batch of products have no color difference (Note: color difference includes color and gloss); The coating surface shall be smooth, flat and uniform, and the surface shall be free from the following defects: no dry back adhesion, particles, bottom leakage, pitting, blooming, wrinkling and mechanical damage.
Shenzhen LED display factory teaches you how to check the screen
First of all, there are many methods to detect the box, the tools commonly used are: vernier caliper, tape measure, level ruler. Box inspection requirements: the inspection personnel must inspect the box incoming materials one by one in strict accordance with the designer’s drawings to check whether there are few or missing parts. The box inspection should pay attention to the following problems:
（1） After punching and welding the holes of LED module, the flatness of the front surface shall be ensured, and the surrounding panels shall not be warped or deformed, and the flatness error shall be less than 1 mm; The positioning hole size of the front panel of the box is strictly controlled, and the error of the hole size and the hole distance is less than 0.1 mm; The X and Y directions of the group hole axis should be on the same straight line, and the straight line should be perpendicular to the edge of the box, and the perpendicularity should be less than 1 mm.
（2） Check whether the burr is removed, whether the sharp angle is blunt, and no scraping or pricking is allowed.
（3） Check whether the overall assembly requirements of LED box are processed according to the drawings truthfully. All accessories (such as locks and hinges) must adopt the existing standard parts, and their mechanical strength and sealing performance must be ensured during assembly.
（4） All nuts and nut posts must be treated by back teeth to ensure that the screws can be locked in smoothly.
（5） All welding points of the box body must be welded firmly, without false welding, missing welding and other phenomena. The welding points must be ground flat, the welding seams need to be scraped, and the treatment process must be strictly standardized. The welding seam must be polished, sealed and waterproof, smooth and flat without acute angle.
（6） The overall dimension deviation of LED box is not more than 0.5mm, and the difference between two diagonal lines is not more than 1mm