Advantages and disadvantages of COB light source
COB light source combines various advantages, such as easier to achieve dimming and color adjustment, high-density packaging, small size, easy light distribution, no patching, reflow soldering process, convenient assembly, etc., and it has been recognized by commercial lighting and other fields. And widely used. The packaging form of COB light source has become an important competitive market in the packaging industry and an important sign of the development watershed of the packaging industry.
COB market competition is not only price, but also the competition of technological upgrading. The disadvantage is that the luminous efficiency is low, most of the COB luminous efficiency on the market is between 100-110LM/W, while other light source devices can reach 160-180LM/W; secondly, the color tolerance is relatively high, mass production At that time, the color consistency of many products on the market is not good, and the color tolerance deviation in the same color temperature or the same shipment batch is too high. The reliability of materials needs to be improved. Because the current COB packaging continues to use the traditional packaging mode, the thermal resistance is high, the sulfur resistance is low, and the high-density packaging is prone to light decay and dead light phenomenon, and the ceramic substrate is easy to brittle. It is not easy to weld, etc.
