What is the difference between cob and led?
COB is a type of LED lighting fixtures.
COB is the abbreviation of chip-on-board, which means that the chip is directly bound and packaged on the entire substrate, and N chips are integrated together for packaging. The problem of power LED, etc., can disperse the heat dissipation of the chip, improve the light efficiency, and improve the glare effect of the LED lamp at the same time; COB has high luminous flux density, less glare and soft light, and emits a uniformly distributed glossy surface. It is widely used in lamps such as bulbs, spotlights, downlights, fluorescent lamps and street lamps;
In addition to COB, there is also SMD in the LED lighting industry, which is the abbreviation of Surface Mounted Devices, which means surface mounted light-emitting diodes, which have a large light-emitting angle, which can reach 120-160 degrees. Good precision, low false welding rate, light weight and small size;
There is also MCOB, which is Muilti Chips On Board, which is a multi-faceted integrated packaging method. It is an extension of the COB packaging process. MCOB packaging directly places the chip in the optical cup, and coats each single chip with phosphor powder. And complete the processes such as dispensing. The LED chip light is concentrated inside the cup. To let more light run out, the more light-emitting ports, the higher the light efficiency. The efficiency of MCOB low-power chip packaging is generally higher than that of high-power chips. Efficiency of chip packaging. It directly places the chip on the heat sink of the metal substrate, thereby shortening the heat dissipation path, reducing the thermal resistance, improving the heat dissipation effect, and effectively reducing the junction temperature of the light-emitting chip;