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Outdoor LED electronic screen acceptance 16 standard
Outdoor LED electronic screen, whether it is installation requirements or product quality requirements than indoor LED display requirements are higher, then for customers, LED display manufacturers in the completion of an outdoor LED display installation, how to accept it? The following LED display manufacturers will briefly introduce the top ten standards for outdoor LED electronic screen acceptance.
1) The appearance of the screen: Watch whether the appearance of the LED electronic screen has no obvious signs of dirt or wear, and whether the mask or the edge of the envelope is uneven.
2) Flatness: According to industry standards, the flatness of the LED display surface should be within ±1mm, the image will not be distorted, and the local convex or concave will cause the blind angle of the LED screen to appear dead angle.
3) Brightness: The brightness of the outdoor LED display is required to be 1500cd/above to ensure the normal operation of the LED display. In addition, we must ensure that the outdoor LED display can clearly see the image under direct sunlight.
4) Viewing angle: The horizontal and vertical viewing angles of outdoor small-pitch LED electronic screens are required to be 140 degrees or more, and the horizontal and vertical viewing angles of ordinary outdoor LED display screens are 120 degrees.
5) Color reproducibility: Color reproducibility refers to the reproducibility of the display screen, ie, whether the color played on the LED display is highly consistent with the color of the playback source, so as to ensure the realism of the image.
6) mosaic phenomenon: watch the LED display whether there will be always bright or often black small four-square, that is, the phenomenon of module necrosis, or black spots phenomenon, that is, the phenomenon of dead lights.
7) With or without color blocks: If there are obvious color differences between adjacent modules viewed from different angles, you can observe whether the LED display has pure red, blue, green, purple, white, yellow, etc. Obvious color difference.
8) White balance effect: In the LED display industry standard, when the ratio of the three primary colors of red, green, and blue is 1:4.6:0.16, the LED electronic screen will show a pure white color, ie, there is no color difference, there is no white blue , Reddish, Bluish and so on.
9) Grounding and electrical strength: The outdoor LED display should be installed with a grounding protection switch, and the protective grounding terminal should be marked. To install the leakage switch, the leakage current to the ground should not exceed 3.5 mA (AC rms value). The ground leakage current is tested at 1.1 times the rated power supply voltage, and the ground leakage between the LED display screen power line and the metal frame is tested. The dielectric strength of the LED display panel shall not cause insulation breakdown at test voltages of 50HZ and 1500V (AC rms) for 1 min.
10) Temperature rise: When the LED display is used normally, the temperature rise of the metal part does not exceed 45K after reaching the thermal equilibrium, and the temperature rise of the insulating material does not exceed 70K.
11) Out-of-control points: The uncontrolled point of the indoor LED display is not more than three ten-thousandths, the out-of-control points of the outdoor LED display should be less than three-thousandths of an inch, and the discrete rate.
12) Lightning protection measures: Install lightning rods on the supporting structure of outdoor LED display screens, indoor LED display screens or LED displays with tall buildings next to them, and do not need to consider installing lightning rods.
13) Steel Structure Lightning Protection: For the counterattack of the steel structure, connect the rigid structure to the shell of the LED display screen, make equal potential, and make a good grounding. The grounding resistance value is generally less than 10 ohms. If the resistance value does not meet the requirements , we must do an additional artificial grounding network, lightning protection device should also be well grounded.
14) Power supply: LED display power supply is 220W ± 10%, 50HZ ± 5% or 80V ± 10%, 50HXZ ± 5% should be specified in the detailed specifications of various types of LED display unit display area of ​​the maximum power consumption Or LED display total power consumption.
15) Heat-dissipating equipment: Outdoor LED electronic screens are required to withstand high temperatures, so to install heat-dissipating equipment, in addition to the LED display cabinet's own fan, the external steel structure must also be equipped with air-conditioning and other cooling equipment.
16) Waterproofing measures: The minimum level of protection for outdoor LED displays is to meet the protection standard of IP65. In addition, LED display manufacturers must use PCB boards coated with three anti-paints on the surface. The cables must have waterproof function. Waterproof and sealing function. Steel structure welded joints should be protected against water and rust to prevent water vapor from entering or rusting.
The above is the introduction of LED display manufacturers on the outdoor LED electronic screen 16 protection standards, including the screen appearance, flatness, viewing angle, brightness, waterproof, lightning protection, grounding, cooling equipment, out of control points, temperature rise, color reproduction There are no mosaics, no color blocks, white balance effects, etc. In addition to these, there are other acceptance criteria. Customers can set different acceptance criteria based on the actual installation environment.