As people continue to pursue the ultimate visual experience, the demand for ultra-high-definition displays is increasing day by day, and LED displays have entered the era of micro-pitch. The LED display has developed from a single color to a two-color, and then to a full-color; the dot pitch is also constantly shrinking, from the previous P30 to P20, P10, P2.5, and then to the rapid development of LED displays below P1.

Under this trend, LED packaging technology has also continued to advance and develop in a diversified direction.

With the arrival of ultra-high-definition display, N-in-one SMD came into being.

Regarding the production of red (R), green (G), and blue (B) primary color chips in color science, continuous development and progress have been made as early as 20 years ago, and chip packaging methods have also become diversified, from DIP packaging to the present SMD, GOB packaging and so on.

GOB and AOB enhance protection function, improve stability and reliability

In view of the limitations of SMD packaging technology, there are two main solutions in the industry: GOB and AOB. Surface treatment is performed on the light board module to prevent moisture, dust, and static electricity, and avoid bumps and scratches. The problem of damage to the lamp beads occurs, which provides a strong guarantee for the stability and reliability of the ultra-high-definition display.

Among them, GOB technology is a surface coating process, similar to the surface gluing process of outdoor display screens. The surface of the SMD lamp board is filled with a layer of transparent epoxy resin, and the surface of the lamp bead is covered with a thickness of 2~5mm to prevent dust And waterproof effect.

GOB technology is suitable for larger-pitch LED displays, such as P8 and P10. If it is applied to smaller-pitch LED displays, it is not easy to dissipate heat, causing the temperature of the display surface to be too high, and the optical display effect is blurred.

AOB is a nano-level surface coating process, mainly including filling layer and surface protection layer. The filling layer improves the ink color of the printed circuit board and the optical effect of the lamp surface to achieve a wide viewing angle, suitable for use in small-pitch LED displays; the surface protection layer prevents the lamp beads from being invaded by moisture and dust. , Becomes the main screen of CCTV 512 special program, the screen color is softer and more delicate, and ultra-high-definition display is realized.