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What is the difference between COB down light and led down light

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What is the difference between COB down light and led down light

(Summary description)COB down light is a high-efficiency integrated surface light source technology in which LED chips are directly attached to a mirror metal substrate with high reflectivity.

What is the difference between COB down light and led down light

(Summary description)COB down light is a high-efficiency integrated surface light source technology in which LED chips are directly attached to a mirror metal substrate with high reflectivity.

Information

1. Different processes

A led lamp is a lamp using light-emitting diodes as a light source. The led is a solid-state semiconductor device that can directly convert electricity into light. As the third generation of lighting technology after incandescent lamps and fluorescent lamps, led has the characteristics of energy saving, environmental protection, safety and reliability.

COB down light

COB down light is a high-efficiency integrated surface light source technology in which LED chips are directly attached to a mirror metal substrate with high reflectivity. This technology eliminates the concept of brackets, no electroplating, no reflow soldering, and no patching processes, so the process is reduced by nearly three points One, the cost is also saved by one third, in general, it is a lamp that is more advanced and more eye-protecting than the LED lamp.

2. Different light

Led lights are energy-saving, environmentally friendly, no flicker, no ultraviolet radiation, and the disadvantage is blue light hazards. The cob lamp has high color rendering, the light color is close to natural color, no flicker, no glare, no electromagnetic radiation, no ultraviolet radiation, infrared radiation, and can protect eyes and skin.

Advantages of COB down light

1. Manufacturing efficiency advantage

The production process of COB down light packaging is basically the same as that of traditional SMD. The efficiency of die bonding and wire bonding is basically the same as that of SMD packaging. However, the efficiency of COB packaging is better than that of SMD in terms of dispensing, separation, spectroscopy, and packaging. Class products are much higher.

Traditional SMD packaging labor and manufacturing costs account for about 15% of the material cost, and COB packaging labor and manufacturing costs account for about 10% of the material cost. With COB packaging, labor and manufacturing costs can be saved by 5%.

2. Advantages of low thermal resistance

The thermal resistance of the traditional SMD package application system is: chip-die bond-solder joints-tin paste-copper foil-insulating layer-aluminum. The thermal resistance of the COB package system is: chip-solid crystal glue-aluminum. The thermal resistance of the COB down light package is much lower than that of the traditional SMD package, which greatly improves the life of the LED.

3. Light quality advantage

In traditional SMD packaging, multiple discrete devices are pasted on a PCB board to form a light source assembly for LED applications in the form of patches. This approach has problems of spot light, glare, and ghosting. The COB down light package is an integrated package and a surface light source. The advantage is that the viewing angle is large and easy to adjust, reducing the loss of light refraction.
 

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