LED electronic large screen is packaged by thousands of lamp beads. Now the lamp beads commonly used by LED display manufacturers are SMD surface mount lamp beads. Led beads are also light-emitting diodes, LED display packaging, installation and debugging can play video, pictures and text and other information. If the quality of LED beads is not good, it will affect the display effect of the whole screen. So, what is the impact of LED electronic large screen lamp beads on the screen?
What is the influence of LED electronic large screen lamp bead on the screen
One square meter LED electronic large screen needs thousands or even tens of thousands of lamp beads. If the LED lamp beads appear false soldering or dead point, it will affect the beauty of the whole screen. In addition, LED electronic large screen is illuminated by LED beads, which determine the main body of the whole screen optical display performance. With the use of time, the faster the speed of light decay, and then reduce the brightness of the screen.
So how to identify the advantages and disadvantages of LED electronic large screen beads? First of all, we need to see the solder joint. The LED lamp beads produced by regular LED lamp bead manufacturers are produced by SMT process, then solder paste and reflow soldering process. Looking at the quality of FPC, there are two kinds of FPC: copper clad and calendered copper. The copper foil of copper clad plate is protruding. If you look at it carefully, you can see it from the joint between pad and FPC.
In addition, we also need to see the cleanliness of the surface of LED beads. If the SMT process is used to produce LED lamp beads, the surface cleanliness is very good, and there are no impurities or stains on the surface. At the same time, we also need to check the chip and production process of LED lamp. Of course, we can’t see it with our eyes. If you use it, put several LED lamp beads on the aging instrument and use high current to aging for 24 hours or more, then measure the LED brightness of several manufacturers to see which led has the least attenuation, and the products with the least attenuation are of good quality.
There are eight main effects of LED electronic large screen lamp beads on the screen, including viewing angle, brightness, failure, antistatic ability, service life, attenuation characteristics, size and consistency. The following is a brief introduction of the mini photoelectric LED display manufacturers.
Perspective: the perspective of LED electronic large screen depends on the perspective of LED beads. Generally speaking, nowadays, SMD beads are widely used in LED electronic large screens, while the horizontal and vertical viewing angles of LED outdoor displays produced by LED display manufacturers can reach 120 degrees. The viewing angle of LED indoor display is also 120 degrees, while the viewing angle of small spacing LED display can reach about 140-160 degrees. For example, the viewing angle of LED display on the highway is 30 degrees, while that on the stage is 120 degrees to 360 degrees. If it is a 360 degree full view, then choose to install a ring screen or LED cylindrical screen.
Brightness: LED lamp bead is the key factor to determine the brightness of LED display screen. Of course, the higher the brightness of LED lamp bead, the larger the current margin. Generally speaking, LED indoor display brightness requirements are relatively low, brightness value of about 1000cd can basically meet the indoor application. The brightness of LED outdoor display screen is 5-6 times of that of indoor display screen, and even some screens can reach the high brightness above 10000 level.
The LED beads have different angle values. If the chip brightness is fixed, the smaller the angle is, the higher the LED brightness is, but the viewing angle of the display screen will be smaller. Therefore, LED manufacturers generally choose the lamp beads with 120 degree viewing angle to ensure the viewing angle of the audience. And for the display screen with different point spacing and sight distance, we should find a balance in brightness, angle and price. Of course, facing the special needs of some customers, LED display manufacturers also prepare high brightness LED lamp beads.