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In the field of LED display screens, COB (Chip on Board) technology and traditional SMD (Surface Mounted Devices) technology are the two main packaging methods. They have significant differences in display effects, stability, cost and application scenarios. This article will introduce the characteristics and differences of these two technologies in detail to help you better choose the appropriate LED display.
1. Packaging technology
COB Technology:
COB technology, that is, the technology of directly mounting the chip on the substrate, integrates the LED chip directly on the PCB board, eliminating the need for a separate LED lamp bead structure. This packaging method makes the display screen thinner and lighter, easier to install and transport, and more beautiful in appearance. COB LED Display: Explore novel display technology.
COB packaging simplifies the packaging process of LED chips. It directly integrates the LED chips on the PCB board and fixes them with glue. The process is simpler, reflow soldering is not required, and the LED chips are more stable. This packaging method not only improves production efficiency, but also reduces production costs.
SMD Technology:
SMD technology, or surface mount technology, is a mature technology for soldering LED lamp beads on circuit boards. This technology is already very mature, the production process is stable and the manufacturing cost is relatively low.
The packaging process of SMD technology is relatively complicated and requires a certain amount of operation time. The minimum dot pitch can only be 1.2mm. Even if the all-in-one can be made smaller, it still cannot get rid of the problem of light falling. Let me show you the 6 differences between SMD LED display and COB LED display.
2. Display effect
COB Technology:
COB display screens can easily achieve smaller pitches, making the display clearer, more delicate, and the colors softer. This technology gives LED display screens obvious advantages in display effects.
The COB display has good luminous uniformity and high color reproduction, especially in high-resolution imaging, and is suitable for small-pitch P0.9, P0.6 and even P0.4 displays. This display screen can meet the high standards of professionals in terms of display effects.
The COB display uses a "surface" light source to emit light, which effectively suppresses moiré, reduces light refraction, and provides better colors. What is a fine pitch LED display?
SMD Technology:
SMD display screen is suitable for P1.2 and above spacing. With the development of technology, by optimizing the packaging process and using smaller chips, SMD color and brightness uniformity can also meet the needs of most application scenarios. Let you know about P1.2 indoor LED display: price, technology and application.
The point light source structure of the SMD display may appear grainy when viewed at close range, and the color and brightness uniformity are relatively poor. This display may not meet the high standards required by professionals in terms of display effects.
3. Stability and protection
COB Technology:
The packaging of COB display screen is more protective and has stronger anti-collision ability. The device is enclosed in the PCB board, and there will be no adverse phenomena such as lamp falling off or lamp failure during transportation, installation and disassembly. The product can be guaranteed to be intact from leaving the factory to being put into use.
The outer shell mask of the COB display is highly protective, with a surface hardness of 4H, and its anti-collision ability is significantly enhanced. This type of display has obvious advantages in terms of protection.
The COB display has lower thermal resistance and high heat dissipation efficiency, which helps to maintain long-term stable operation and extend the service life of the display.
SMD Technology:
The lamp beads of SMD display screens are soldered on the PCB board, and they are easy to fall off when hit. When repairing, technicians need to go to the site to solder or directly replace the unit board, resulting in a high after-sales rate.
The protection level of SMD display screen is low, and it does not have functions such as moisture-proof, waterproof, dust-proof, shock-proof, and collision-proof. This type of display may not be able to meet the needs of some specific environments in terms of stability.
4. Cost
COB Technology:
COB packaging eliminates the need for separate LED lamp bead structures, which can significantly reduce costs during mass production. This packaging method has certain advantages in cost.
The manufacturing cost of COB display screens is relatively high, mainly due to the high packaging technology requirements, high R&D costs, high enterprise transformation costs, and few manufacturers. What is COB LED display and what is COB LED technology?
SMD Technology:
SMD technology is already very mature and the production cost is relatively low.
The manufacturing cost of SMD display screens is low, but as the dot pitch decreases, the cost will gradually increase. This type of display has certain advantages in cost.
5. Application scenarios
COB Technology:
COB display screens are suitable for occasions with high requirements for display effects, such as studios, high-end conference rooms, weather report halls, commercial displays, etc. These occasions require displays with high definition, high contrast and high color reproduction.
The COB display screen has good protection performance and is particularly suitable for application scenarios with high requirements for environmental adaptability, such as outdoor advertising, security monitoring, etc. This type of display has obvious advantages in specific application scenarios.
SMD Technology:
SMD display screens are suitable for occasions that are cost-sensitive and have relatively low requirements for display effects, such as general commercial advertisements, stage backgrounds, etc.
SMD display screens are highly flexible, with customizable sizes and shapes. They can be spliced into special shapes such as arcs to meet the needs of different sizes and shapes. This type of display has certain advantages in flexibility.
COB LED displays and traditional SMD LED displays each have their own advantages and disadvantages. COB display screens have significant advantages in display effect, stability and protection, and are particularly suitable for occasions requiring high resolution, high definition and high protection. SMD displays, on the other hand, perform better in terms of cost and flexibility, and are suitable for cost-sensitive applications with relatively low requirements for display effects.
