Identify LED display nine skills - quality China lighting network

Flat screen surface roughness to within + / - 1 mm, to ensure that the display image is not distorted, local convex or concave leads to display the visual Angle of corner. Between the box body and box body, gap between modules and modules to within 1 mm one. Gap is too big, will lead to screen border clear, visual. The stand or fall of flatness is mainly decided by the production process. Brightness and the viewing Angle of indoor full color brightness to above 800 CD/m2, outdoor full color brightness to above 5000 CD/m2, to guarantee the normal work of the screen, otherwise it will because the brightness is too low and can't see shown in the image. The brightness of the display is not the brighter the better, should match with the brightness of LED encapsulation. Constantly improve current is added brightness, can lead to LED attenuation too fast, display life fell sharply. Can ask vendor to provide parameters to confirm the report. The size of the screen brightness mainly decided by the stand or fall of LED tube core. Refers to the visual Angle from the screen body measurement can you see the whole screen content the biggest Angle. Viewing angles directly depends on the size of the display screen of the audience, and the bigger the better. Visual Angle to over 150 degrees. The size of the viewing Angle is mainly composed of tube core encapsulated way to decide. The white balance effect white balance effect is one of the most important indicator display. 16 will only show the pure white, if the actual rate is a little deviation will appear white balance deviation, generally pay attention to whether there is a slant blue, white slant yellow phenomenon. Monochrome, an LED and the brightness difference between wavelength difference as small as possible, standing on the screen body side watching a colorless difference or partial color, consistency is better. The stand or fall of the white balance is mainly composed of the brightness of LED tube core wavelength ratio and display control system, and to determine the tube core of color reducibility may also be affected. The reducibility of color reducibility is refers to the display of color reducibility, the color of the display shows both to maintain highly consistent with the colour of the source, so as to ensure the image sense of reality. Dead refers to the phenomenon of Mosaic Mosaic, appear on the screen normally on or often black small four squares, both module necrosis phenomenon, the main reason for the screen by IC or connector quality closes nevertheless. Dead point refers to appear on the screen normally on or black often a single point, how many of the dead point is mainly composed of the stand or fall of tube core and manufacturers anti-static measures whether perfect to decide. Exist between those with and without the shades of color piece is refers to the adjacent modules are clear off color, color transition in module, color piece phenomenon caused mainly by the control system is poorer, grey level is not high, caused by lower scanning frequency. Display stability stability refers to the LED display in the quality of the finished product after aging stage and reliable. To the manufacturer to aging record to get screen shown during aging condition of how to decide. Security of LED display is to rely on more box, each box must b: to do the outside covering crust grounding protection, made of grounding resistance should be less than 0. 1 o. And can bear high pressure, the 1500 v 1 min no breakdown. In the high voltage input and power supply high voltage wiring must be warning signs and banners. The packing and shipping LED display belong to precious cargo, the weight is large, the manufacturer used packing is very important. Generally according to a single box packing, each face must have a protective enclosure cushion, casing internal space is in transit. The outer packing must have clear label. YanZhiXiang

the LED screen mesh