LEDs enter the field of lighting, the initial form is the lamp beads solder directly on the board, first 3528, 5050, then 3014, 2835.
However, the drawback of this method is that there are many processes, and the LED package is SMT, which has high cost and heat transfer. So COB was introduced to the LED field at this time.
In fact, the COB light source we are talking about is an upgraded version of the SMD light source, then you may ask, what are the upgrades? The following will tell you what is the difference between the cob light source and the SMD light source.
LED SMD means surface-mounted LEDs with a large illumination angle of 120-160 degrees. Compared with the early plug-in package, it is high efficiency, good precision, low solder joint rate, light weight and small size.
It means that the chip is directly packaged on the entire substrate, that is, the N chips are integrated and integrated on the inner substrate for packaging. Mainly used to solve the problem of low-power chip manufacturing high-power LED lights, can disperse chip heat dissipation, improve light efficiency, and improve the glare effect of LED lights.
The COB light source means that the chip is directly packaged on the entire aluminum Substrat, that is, many chips are successively integrated and packaged on the inner substrate. Mainly used to solve the problem of low-power chip manufacturing high-power LED lights, can disperse chip heat dissipation, improve light efficiency, and improve the glare effect of LED lights. The COB luminous flux density is high, and the glare is less and emits a uniform light surface.
The COB light source is a high-efficiency integrated surface light source technology that directly attaches the LED chip to a mirror metal substrate with high reflectivity.
This technology cancel the bracket , electro plating, no reflow soldering, and no chips mounting, so the process is reduced by nearly three points.
The COB light source can be simply understood as a high-power integrated surface light source, and the light-emitting area and external dimensions of the light source can be designed according to the product shape structure.
Electrically stable, circuit design, optical design, and good heat dissipation design;
The heat sink process technology ensures LEDs have an industry-leading heat lumen maintenance rate (95%).
It is convenient for secondary optical matching of products and improves lighting quality. ;
High CRI, uniform light, no spot, healthy and environmentally friendly.
The installation is simple, the use is convenient, the design difficulty of the lamp is reduced, and the cost of lamp processing and subsequent maintenance is saved.
After all we said above, what we should use at last? Here is our suggestion:
Different lamps choose different light sources. It depends on their respective characters.
For example, like LED DOWNLIGHT, we generally recommend COB light source, because the COB design is highly integrated and directly packaged on the substrate (circuit, heat sink integrated design), compact structure, super high power. The point-lighting characteristics of the COB make it ideal for use in high power, small housing, concentrating and directional lighting. In addition to LED DOWNLIGHT, LED TRACK LIGHT, LED SPOT LIGHT is also very suitable for COB light source.
Meanwhile, LED PANEL LIGHT or LED CEILIG LIGHT may be more suitable for SMD, because SMD has multiple light-emitting points, which can fullfil large-area light transmission through the diffuser, and the light is softer and anti-glare.
In fact, regardless of COB or SMD, they are all LEDs, but the packaging method is different. You can choose the suitable one according to your lighting design needs.