1 waterproof-this is the first question that comes to mind, because rain water placed outdoors will directly rain on the screen surface, so how can outdoor LED display be waterproof? The waterproof work of outdoor LED display screen is mainly reflected in three aspects: the first module waterproof, the second box waterproof, and the third frame waterproof. The most important thing is that the box is waterproof. First of all, even if the frame structure is waterproof, it will always leak a little. Generally, the outdoor display area of LED is relatively large. I'm afraid it's hard to do at all. Moreover, when the frame structure is exposed to the sun, rain, temperature and other external conditions, it is easy to cause local waterproof failure. Let's talk about the waterproof of the module. The waterproof of the module is to encapsulate silica gel between the LED lamp and PCB board, but the waterproof of the module is only unilateral, and the power supply and other components in the box are not waterproof. So now there's only the box left. Generally speaking, if you want to buy an outdoor screen, you'd better choose a manufacturer that has passed IP66 (IP66- waterproof, shockproof and dustproof grade). With the above three aspects of waterproof, waterproof work is basically done. (It's best to choose the manufacturer with IP66 grade, because if the waterproof performance of the box is not good, the circuit inside is easy to corrode, which directly affects the life of the outdoor LED display. ) 。
2 Brightness-As the outdoor LED display screen will be exposed to direct sunlight, the sunlight reflected by the screen will affect the playback effect. Sometimes, if the brightness of the LED display screen is too low, you can't see the content on the screen at all. How bright should the outdoor LED display screen be so as not to be affected by direct sunlight? For example, the screen brightness reflected by sunlight in Guangzhou is above 5000 CD/ square, so the screen brightness should be above 6000 CD/ square when there is direct sunlight, so that it will not be affected by sunlight. Most domestic manufacturers of outdoor LED display screens have met this requirement.
3 power consumption-this is a concern of many people. The maximum power consumption of outdoor LED display (full color) is about 800W/ square, which means that when the outdoor LED display reaches the maximum power (peak value) at every moment, the power consumption per square hour will be 0.8 kWh. But not all LED outdoor displays will always be at the peak. Because when all the lights in the screen (RGB lights) are on, and they are the brightest, the LED home display screen will reach its peak. When an outdoor LED display normally plays an animation, the power consumption is only about 65% of the maximum power consumption. Therefore, the power consumption of outdoor LED display screen per square hour is: 0.8KW*65%=0.52 kWh. If the annual power consumption of outdoor LED display screen is calculated by 100 square meter (calculated by playing 12 hours every day), it is:12 * 30 *12 *12.
4 service life-this depends on several aspects. First, materials, including LED lamps, PCB boards, IC, etc. Some foreign brands of LED lights in Ke Rui and Japan are of good quality, but their prices are 4-5 times higher than those in China. In China, Guanglei in Taiwan Province Province and Hangzhou Taxi Blue have done better. In terms of IC, the price of IC accumulated in the United States will be higher, and in terms of PCB, it will be better. Here, I provide a combination with high cost performance: Taiwan Province Guanglei and Hangzhou Shi Lan IC are used for the wick, and Tao Jian is used for the PCB boards in Yuan Zhi and Wei Ming. The service life of this combination is 1 1 year (ideally), but there are some external conditions, such as waterproof, shockproof and dustproof, so if it is an outdoor LED display, it is best to choose a manufacturer that has passed the IP66 certification level. Second, at present, some LED display manufacturers are hand-made, and even many LED display manufacturers are actually looking for others to do OEM work. They don't have actual production capacity (it's best for such manufacturers not to consider that the cost performance will not be too high). LED display screen is not a handicraft, and a good manufacturer must have a complete mechanized production line. Because if you insert LED lights and patches by hand, although the cost will be reduced, there will be many problems. Moreover, if the lamp or patch is inserted manually, many human errors will occur when workers work for a long time, such as virtual welding, and the flatness of the whole screen is poor. Therefore, it is recommended to go to the assembly line of their factory to buy LED display screens, which is the most direct way. Another point is that LED display manufacturers must have a strict quality control system. However, a fully mechanized production line is not enough. The quality of production machinery is also an important factor affecting the quality of LED display screen. Here I provide several important varieties and brands of production machinery: ① mounter, ② plug-in machine, ③ wave soldering, ④ reflow soldering, glue filling machine, lamp finishing machine, etc. The most important things are mounter and lamp insertion machine, wave soldering machine, and "Global" is the best brand of these machines. From the above two aspects of materials and technology, we can see that when buying LED display screens, we must ask to visit their factories, observe their production lines and quality control, and see if they are hand-made or partially hand-made factories. Finally, it would be better if the manufacturer's products have the following product certifications: IP66, CE, FCC, 3C, etc.