Shenzhen Crescent Optoelectronic Co., Ltd.
Are SMD LED Beads Environmentally Friendly?
At present, more and more surface mounting device led beads have replaced conservative lighting lamps, and are used in l...
What are the Differences between COB Package and SMD Package in the Field of LED Display?
The existence of double giants in the field of LED display has jointly developed and flourished the LED industry. As a c...

What is cob Package?

COB package the full name is chips on board, it is a technology to solve the problem of heat dissipation of LED. Compared with direct plug-in and SMD, it has the advantages of saving space, simplifying packaging operation and high efficiency of thermal management.

COB packaging is to bond bare chips with conductive or non-conductive adhesives on the interconnection substrate, and then wire bonding to achieve its electrical connection. If the bare chip is directly exposed to the air, it is vulnerable to pollution or man-made damage, affecting or destroying the function of the chip, so the chip and bonding wire are encapsulated with glue. It is also called soft package.

The thermal resistance of COB packaged system is much lower than that of traditional SMD packaged system, so the service life of COB packaged LED lamps is greatly improved. Traditional SMD packages use patches to attach discrete devices to PCB boards to form light source components for LED applications. This method has the problems of spot lighting, glare and ghosting. The COB package is an integrated package and a surface light source. It has a large angle of view and can be easily adjusted to reduce the loss of light refraction.

The traditional SMD package method is to attach several different devices to the PCB board to form LED light source components. The problems of electro-optics, ghosting and glare are ubiquitous in the light source made by this packaging process. COB light source does not have the above problems. It belongs to surface light source. Its visual angle is large and easy to adjust, which reduces the loss of light caused by refraction.

Related News
  • Annual Meeting Invitation

    Annual Meeting Invitation

    December 17, 2018Dear______Crescent specialized in LED encapsulation for 9 years. Thanks for your long-term support on Crescent. We would like to invite you to be present at a celebration for new coming year and new p...view
  • Advantages of High Power LED With Warm White Color

    Advantages of High Power LED With Warm White Color

    March 13, 2019First of all, this kind of LED is environmentally friendly, which has no mercury, lead and other heavy metals polluting the environment. It will not produce ultraviolet light when luminescent. So this...view
  • Discussion on Four Categories of SMD LED Lamp Beads

    Discussion on Four Categories of SMD LED Lamp Beads

    June 27, 2019With the rapid development of LED display, there are many different types and sizes of led. SMD LED, LED beads and other products also occupy a place in the LED industry, especially the application of...view
  • SMD LED Color Detection

    SMD LED Color Detection

    March 13, 2019When people face the question of what color is, they always think it is a very simple question. if someone asks the child what color the apple is, the children will say in unison: red. But if you ask ...view