In the LED display more and more widely used today, the display technology is also with the development of the market economy more and more mature. All walks of life will use the LED display, but non-industry people still know very little about the LED display, when choosing to buy, will inevitably encounter many problems. The following editorial to share with you the LED display screen and box inspection standards.

When buying, LED display screen body inspection is very necessary. 

First of all, from the appearance of the inspection: general visual inspection and feel can initially see the display screen body whether there is a problem; 

second, the display coating should not have any shedding phenomenon;

third, to check the screen screen color is consistent, or there is no off-color phenomenon, not bright phenomenon; 

fourth, the screen screen printing content should be clear, complete, uniform color, no burrs, defects, trailing, pollution phenomenon, all the specific content of the screen printing, location, pattern and font size, by the corresponding screen prints. All screen printing specific content, location, pattern and font size, described in detail by the corresponding drawings, manufacturers strictly according to the design requirements of the drawings screen printing. 

Fifth, the color is consistent with the sample, normal vision in natural light or fluorescent light observation without obvious color difference, the same batch of products without color difference, the coating surface is smooth, flat, uniform, the surface shall not be dry back to sticky, particles, leakage of the bottom, pockmarks, hair flower, wrinkles, mechanical damage and other defects.

Finish the screen body inspection standards, the next should speak box body inspection standards.

LED display box test method is more, generally use the tools are: vernier calipers, tape measure, level ruler. Box test requirements inspectors must be strictly in accordance with the designers drawings of the box material to carry out one by one inspection, check whether there are fewer, missing processing parts. Box testing should pay attention to six issues,

first, the LED display box size deviation is not greater than 0.5mm, the two diagonal difference is not greater than 1mm; 

second, check whether the burr is removed, whether the sharp angle is obtuse, do not allow scraping, stabbing phenomenon; 

third, each nut and nut column must be processed by the tooth back to ensure that the screws can be successfully locked into; 

fourth, the test box overall assembly requirements according to the drawings as a matter of fact Processing, each accessory (such as locks, hinges) shall use the existing standard parts, assembly must ensure its mechanical strength and sealing performance; 

Fifth, the box of each weld welding must be solid, no welding, leakage of welding and other phenomena, the welding point must be ground, the weld needs to be done at the scraping gray, the processing technology must be strict standards, the weld must be polished at the sealing of waterproofing, smooth, flat and no sharp corners; 

Sixth, the punching of LED module holes and welding After molding should ensure the flatness of the front, around the panel shall not have warping, deformation, flatness error is less than 1MM, the front panel of the box positioning holes size is strictly controlled, the hole size and hole distance error is less than 0.1mm, the group hole axis X, Y direction should be in the same straight line, and the straight line should be perpendicular to the edge of the box, perpendicularity is less than 1mm.

The above is a small compilation of the screen and box inspection standards, I hope that the upcoming procurement of display or display industry is interested in friends to help. LCF warm tips: customers in the purchase of LED display, it is best to choose a certain scale, in the industry has a certain popularity of the LED display manufacturers, and in the delivery of goods before the factory inspection, to ensure that the products purchased have no quality problems.