In this article, we are going to introduce you some basic knowledge about COB LED, which is a new trend of LED light bulb development. We wish this information can help you to select LED Light Bulb more wisely.
LED is the abbreviation of lighting emitting diode. All LED lighting is made up of a light package in one form or other. A COB or ‘chips on board’ light is a type of led package. COB LED means chip on board LED. It’s one of bare chip technologies, which interconnect bare chip to substrate by conductive or non-conductive adhesive, and then wire bonding to achieve its electrical connection. COB package is attach number of chips directly to the substrate, then packaged together by silica gel, epoxy resin or other materials, the yellow part is phosphor.
First, heat dissipation is a very important aspect of LED lighting because it can have a major impact on the life expectancy of the luminaire. Traditional LED chips are not placed directly on the substrate. In COB lighting, single LED chips are placed directly on a circuit board (or substrate) which has thermal properties to disperse heat. Therefore COB LED has greater thermal resistance.
Third, COB packaging can allow manufacture to place chips of different color together. As the light color of LED is actually a mix of red, blue, yellow and so on. COB packaging enhances the color rendering. Moreover, as chips are on the same board, its light appearance is more uniform than traditional LED.
To sum up, the advantages of COB LED has:
- Better life expectancy
- higher light levels on the same space
- more stability and reliability
- more uniform light appearance
- greater color rendering