The packaging technology of LED displays is crucial to their performance and quality. The following is an introduction to the four packaging technologies of SMD, COB, GOB and VOB:
1. SMD packaging technology:
*SMD is the abbreviation of Surface Mounted Devices, which means surface mount device and is one of SMT (Surface Mount Technology) components.
* Indoor full-color LED screens mainly use surface-mounted three-in-one SMD. This technology encapsulates SMT lamps with LED chips of three different colors, RGB, at a certain distance in the same colloid to form a display module.
* Features: The product has low reliability, poor surface protection, and high defective pixel rate, but the price is relatively low.
2. COB packaging technology:
*COB is the abbreviation of Chip-on-Board, which means chip package on board.
*COB technology integrates light-emitting chips into the PCB board instead of welding them to the PCB one by one. This technology effectively improves the light color of the LED display, reduces risks and costs.
* Compared with traditional SMD packaging technology, COB packaging technology can save LED primary packaging costs, light engine module production costs and secondary light distribution costs. Actual estimates can reduce light source costs by about 30%.
* Features: COB packaging technology has good color consistency, large viewing angle, uniform light spot, high brightness, and good color mixing effect.
3. GOB packaging technology:
*GOB is a new type of LED packaging technology. It uses a special optical thermal conductive nano-scale potting material to fill the gaps between the lamp beads on the conventional LED display PCB board, enhancing the The stability of LED lamp beads.
* GOB display screen is a good solution to the problem of LED display screen being prone to dead lights and lights falling off.
* Traditional SMD packaging technology is prone to lamp failure and deadness, resulting in a high after-sales rate, while GOB packaging technology improves the stability and reliability of the display by filling the gaps between the lamp beads.
4. VOB packaging technology:
* VOB technology LED display has "ten protection" functions, including waterproof, moisture-proof, dust-proof, impact-proof, bump-proof, salt spray-proof, oxidation-proof, blue-light-proof, vibration-proof and anti-static.
* Nano glue is added to the surface of the VOB coated LED display PCB board, which is equivalent to a layer of film, which can protect the internal electronic components from the external environment.
* This technology effectively blocks the contact between electronic components and humid air through three-dimensional coating and comprehensive protection, improving the service life of LEDs.
In short, these four LED display packaging technologies each have their own characteristics and advantages, and the appropriate packaging technology can be selected according to specific application scenarios and needs.