With the continuous development of the market economy, people's demand for LED displays is also increasing. LED display has a history of decades of development in China. Our technology in this industry has made considerable progress, and it is almost the same as the world's first-class level. In some areas, even overtaking in corners, we have achieved surpassing foreign technology. , Micro-pitch display technology is one of the representatives.

With the rapid progress and maturity of LED display technology and the improvement of customer requirements, the dot pitch of micro-pitch LED displays is getting smaller and smaller. Now the market has introduced P1.2, P0.9, P0.8 and other fine-pitch LED displays. , And is widely used in video conferences, command and dispatch centers, security monitoring centers, radio and television media and other fields. The characteristics of high-definition display, high refresh rate, seamless splicing, good heat dissipation system, convenient and flexible disassembly and assembly, energy saving and environmental protection of the micro-pitch LED display have been familiar to the majority of industry users. However, when it comes to the specific process of the micro-pitch LED display Many people still don’t know the technology. The following editor will analyze the various process technologies of the micro-pitch LED display, so that everyone can have a more thorough understanding of the micro-pitch LED display.

　　 One. Packaging technology: LED displays with density above P2 generally use lamp beads of 1515, 2020, 3528, and the shape of LED pins uses J or L packaging. When the pins are welded from the side, there will be reflections in the welding area, and the ink color effect is poor. It is bound to increase the mask to improve the contrast. With further increase in density, L or J packaging cannot meet application requirements, and QFN packaging must be used. The characteristic of this process is that there is no lateral welding of the pins, and the welding area is non-reflective, which makes the color rendering effect very good. In addition, it adopts all-black integrated design and compression molding, the contrast of the picture is increased by 50%, and the picture quality of the display application is better than that of the previous display.

　　 2. Soldering process: Too fast reflow soldering temperature rise will cause uneven wetting, which will inevitably cause the device to shift during the process of wetting imbalance. Excessive wind circulation will also cause displacement of the device. Try to choose a reflow soldering machine above 12 temperature zone, chain speed, temperature rise, circulating wind power, etc. as strict control items, that is, to meet the requirements of soldering reliability, but also to reduce or avoid component displacement, and try to control it within the required range. Generally, the range of 2% of the pixel pitch is used as the control value.

　　3. Cabinet assembly: The cabinet is composed of different modules. The flatness of the cabinet and the gap between the modules are directly related to the overall effect of the cabinet after assembly. Aluminum plate processing boxes and die-cast aluminum boxes are currently widely used box types, and the flatness can reach within 10 wires. The splicing gap between the modules is evaluated by the distance between the nearest pixels of the two modules, and the two pixels are too close to light up and then bright Line, two pixels too far will cause dark lines. Before assembling, it is necessary to measure and calculate the seam of the module, and then select the metal sheet of relative thickness as the jig to be inserted in advance for assembling.

　　 Fourth, screen assembly: the assembled cabinet needs to be assembled into a screen before it can display refined pictures and videos. However, the dimensional tolerance of the box itself and the cumulative tolerance of assembly cannot be ignored for the assembly effect of the micro-pitch LED display. If the pixel pitch of the nearest device between the cabinet and the cabinet is too large or too small, it will cause dark and bright lines to be displayed. The problem of dark and bright lines is a difficult problem that cannot be ignored and needs to be overcome in the current micro-pitch LED display. Some companies make adjustments by sticking 3m tape and fine-tuning nuts on the box body to achieve the best results.