What is the difference between cob light source and led?

The difference between cob light source and led

1, COB is a kind of LED lighting fixtures, COB is chip-on-board acronym, refers to the chip directly throughout the substrate for binding package, N chip integrated together for packaging, mainly used to solve the problem of small power chip manufacturing high-power LEDs, etc., can be dispersed chip heat dissipation, improve luminous efficacy, and at the same time to improve the effect of glare LED lamps; COB luminous flux COB luminous flux of high density, glare less light soft, issued by a uniformly distributed light surface, currently in the bulb, spotlights, downlights, fluorescent lamps and street lamps and other lamps and lanterns on the application of more;

2, In addition to COB, LED lighting industry, there is SMD, also known as Surface Mounted
Devices abbreviation, meaning surface mounted light-emitting diodes, with a large light-emitting angle, can reach 120-160 degrees, compared to the early plug-in package high efficiency, good precision, low rate of false soldering, light weight, small size and so on;

3,And MCOB, that is, Muilti Chips On
Board, that is, the multi-decent integrated packaging, it is the expansion of the COB packaging process, MCOB packaging is the chip directly on the inside of the optical cup, in each single chip coated with phosphor and complete the process of dispensing, etc. The LED chip light is concentrated in the cup inside, to let the light run out more, the more the light out of the mouth of the light efficiency, the higher the efficiency of the MCOB low-power chip package is generally higher than the efficiency of high-power chip package. MCOB small power chip package efficiency is generally higher than the efficiency of high-power chip package. It is directly placed on the chip in the metal and other substrate heat sink, thus shortening the heat dissipation path, reduce thermal resistance, enhance the heat dissipation effect, and effectively reduce the junction temperature of the light-emitting chip;