When buying lights, often hear sales staff say that we are LED lights, environmental protection and energy saving, now everywhere can also hear about led words, in addition to our familiar led lights environmental protection and energy saving, we often hear people mention cob lamps, I believe that many people do not have a deeper understanding of cob, then what is cob? What is the difference with led?
First talk about LED, led lamp is a light emitting diode as the light source, its basic structure is an electroluminescent semiconductor chip, is a solid-state semiconductor device, it can directly convert electricity into light. One end of the chip is attached to a bracket, one end is a negative electrode, and the other end is connected to the positive electrode of the power supply, so that the entire chip is encapsulated by epoxy resin, which protects the internal core wire, and then the shell is installed, so the seismic performance of the LED lamp is good. led light Angle is large, can reach 120-160 degrees, compared with the early plug-in package high efficiency, good precision, low welding rate, light weight, small volume and so on.
In the early days, we saw barbershops, KTV, restaurants, theaters and other led lights composed of numbers or words were mostly used in billboards, and the LED lights were mostly used as indicators and display LED boards. With the emergence of white leds, they are also used as lighting.
LED is known as the fourth generation lighting source or green light source, with energy-saving, environmental protection, long life, small size, safe and reliable characteristics, widely used in a variety of indicators, display, decoration, backlight, general lighting and urban night scene and other fields. According to the use of different functions, it can be divided into information display, traffic lights, car lamps, LCD screen backlight, general lighting five categories.
In theory, the service life of LED lights (single light emitting diodes) is generally 10,000 hours. However, after assembling into a lamp, because other electronic components also have a life, so the LED lamp can not reach 10,000 hours of service life, in general, can only reach 5,000 hours.
The COB light source means that the chip is directly packaged on the entire substrate, that is, N chips are inherited and integrated together on the substrate for packaging. This technology eliminates the concept of support, no plating, no reflow, no patch process, so the process is reduced by nearly 1/3, and the cost is also saved by 1/3. It is mainly used to solve the problem of low-power chip manufacturing high-power LED lights, which can disperse the heat dissipation of the chip, improve the light efficiency, and improve the glare effect of LED lights. COB has high luminous flux density, less glare and soft light, and emits a uniform distribution of light. In popular terms, it is more advanced than led lights, more eye protection lights.
The difference between Cob lamp and led lamp is that led lamp can save environmental protection, no stroboscopic, no ultraviolet radiation, and the disadvantage is the harm of blue light. Cob lamp high color rendering, light color close to natural color, no stroboscopic, no glare, no electromagnetic radiation, no ultraviolet radiation, infrared radiation can protect the eyes and skin. These two are actually LED, but the packaging method is different, cob packaging process and light efficiency are more advantageous, is the future development trend.
Post time: Jan-23-2024