Application of high power COB light source

COB light source is a high-efficiency integrated surface light source technology that directly attaches LED chips to a mirror metal substrate with high reflectivity. This technology eliminates the concept of brackets, has no electroplating, no reflow soldering, and no patch process, so the process is reduced by nearly one-third and the cost is also saved by one-third.

COB light source can be simply understood as a high-power integrated surface light source, and the light output area and size of the light source can be designed according to the product appearance structure.

Features of cob light source

Cheap and convenient

Electrically stable, circuit design, optical design, and heat dissipation design are scientific and reasonable;

Heat sink process technology is used to ensure that LED has an industry-leading thermal lumen maintenance rate (95%).

It is convenient for the secondary optical matching of the product to improve the lighting quality. ;

High color rendering, uniform light emission, no light spot, healthy and environmentally friendly.

Simple installation, easy to use, reduce the difficulty of lamp design, and save lamp processing and subsequent maintenance costs.

Manufacturing process of cob light source

The process of COB chip on board (COB) is to first cover the silicon wafer placement point on the substrate surface with thermal conductive epoxy resin (generally epoxy resin doped with silver particles), then directly place the silicon wafer on the substrate surface, heat treat until the silicon wafer is firmly fixed on the substrate, and then use wire welding to directly establish electrical connection between the silicon wafer and the substrate.

Advantages and disadvantages of high-power cob light source

Advantages:

Compared with discrete LED devices, COB light source modules can save the primary packaging cost of LEDs, the production cost of light engine modules and the secondary light distribution cost in applications. In the lighting fixture system with the same function, the actual measurement can reduce the light source cost by about 30%, which is of great significance for the application and promotion of semiconductor lighting. In terms of performance, through reasonable design and microlens molding, COB light source modules can effectively avoid the disadvantages of point light and glare in the combination of discrete light source devices; it can also effectively improve the color rendering of the light source without significantly reducing the efficiency and life of the light source by adding appropriate red chip combinations. In terms of application, COB light source modules can make the installation and production of lighting fixtures simpler and more convenient, effectively reducing the application cost. In terms of production, the existing process technology and equipment can fully support the large-scale manufacturing of COB light source modules with high yield. With the expansion of the LED lighting market, the demand for lamps is growing rapidly. We can gradually form a series of mainstream COB light source module products according to the needs of different lamp applications for large-scale production.

Disadvantages:

COB LEDs require more materials, such as phosphors and silica gel, in manufacturing, and have no cost advantage. In addition, the serial and parallel mode of COB LEDs is fixed at the factory, which is not as free as a single high-power LED to match the quantity and color, adjust the color temperature and electrical parameters.

Application of high-power cob light source

LED planar light source (COB planar light source) is energy-saving and environmentally friendly, and multi-core integrated packaging is on an aluminum substrate or a ceramic substrate. It has low thermal resistance, good heat dissipation, low cost, simple and convenient installation, uniform and soft light without light spots and other superior performances, and is favored by home and commercial decorative lighting.

Mainly used in clothing spotlights, counter lighting, jewelry lighting, medical instrument lighting, home decoration lighting, etc., which require soft and enjoyable light sources. LED side light source module, LED injection module, LED backlight module, LED waterproof module, LED non-proof module and LED module.

Application sites: shopping malls, indoors, clothing, cabinets, living rooms, corridors, hotels, bedrooms, kitchens, etc.

Application lamps: T5/T8/T10 fluorescent tubes, bulbs, downlights, wall lamps, ceiling lamps, Par lamps, ceiling lamps, reading lamps, spotlights, jewelry lamps, plant lamps, table lamps, etc.