What is COB light source? What is LED light source? What is the difference between them
What is COB light source? What is LED light source? COB light source can be simply understood as a high-power integrated surface light source. The light output area and dimensions of the light source can be designed according to the product appearance structure. It is cheap, convenient, and electrically stable, and its performance is more advantageous than LED light sources. The LED light source refers to a surface-mounted light-emitting diode electric light source. So, what are the characteristics of COB light source and LED light source? What's the difference between them? This article introduces COB light sources and LED light sources. Friends who are interested in light source knowledge can learn about it.
What is COB light source?
COB light source is a high-efficiency integrated surface light source technology that directly attaches LED chips to a highly reflective mirror metal substrate. This technology eliminates the concept of brackets and requires no electroplating, reflow soldering, or patching processes, so the process is reduced by nearly three thirds. One, the cost is also saved by one-third.
COB light source can be simply understood as a high-power integrated surface light source. The light output area and overall size of the light source can be designed according to the product appearance structure.
The characteristics of COB light source products are that they are cheap, convenient, electrically stable, and the circuit design, optical design, and heat dissipation design are scientific and reasonable. It has more advantages than LED!
Generally speaking, COB light sources are mainly used for indoor lighting. Its advantages are that the assembly process is relatively simple and the light panel is more uniform. However, the heat dissipation is not as good as TOP. It can only be applied in the range of 3-50 watts. The light efficiency will be higher than TOP when compared with the same. A little lower.
The advantages of the COB plane light source are that the luminosity divergence is large and wide, and the light source area is relatively full. The disadvantage is that it consumes more power and is more troublesome to set up.
Features of COB light source:
1. Can be freely matched and combined to form a variety of LED lamps, easy to assemble. It can overcome the disadvantages of large size and high cost of SMD LEDs.
2. High reliability, no dead lights and no plaque. Its precision packaging process allows the chip to fully dissipate heat to ensure the quality of the chip and extend its life.
3. Even light, soft light, no glare, no harm to the eyes. It can directly overcome the dazzling effect of high-power LED on the market. Shortcomings.
4. High color rendering index and high light efficiency. It can achieve 120lm/w and the light-emitting angle is above 120°. Save costs, no need to make another PCB board, green and environmentally friendly, no pollution.
5. Under normal current, the attenuation is minimal and controlled to be less than 3% within 1000H.
6. Safe and reliable, all operate below 50V, and full consideration has been given to application certification.
What is LED light source?
LED is the abbreviation of Light Emitting Diode in English. It is a solid-state semiconductor cold light source. It is an optoelectronic device that uses semiconductor compound materials to make a PN junction. Its light-emitting principle is: when electrons and holes in the PN junction During recombination, the electrons transition from a high energy level to a low energy level, and the electrons release excess energy in the form of emitted photons (electromagnetic waves), producing electroluminescence. The color of LED light is related to the material elements that make up its base. It has the characteristics of long service life, low power consumption and fast response time.
Characteristics of LED light source:
(1) Long working life. As a semiconductor solid light-emitting device, LED has a longer working life than other light-emitting devices, and its brightness half-life can usually reach 100,000 hours. If LEDs are used to replace traditional car lights, their lifespan will be equivalent to that of the car, and they will not need to be repaired or replaced for life.
(2) Low power consumption. LED is a high-efficiency optoelectronic device, so it consumes less power at the same brightness and can significantly reduce energy consumption.
With the development of future processes and materials, LEDs will have higher luminous efficiency.
(3) Fast response time. LED can generally respond within tens of nanoseconds, so it is a high-speed device, which is beyond the reach of other light sources. Using LED to make the high-mounted brake lights of automobiles greatly improves the safety of automobiles at high speeds.
(4) Small size, light weight and impact resistance. This is an inherent characteristic of semiconductor solid devices.
(5) Easy to adjust light and color, and highly controllable. As a light-emitting device, LED can control the brightness through changes in the flowing current, and can also achieve color changes and adjustments through the configuration of LEDs of different wavelengths. Therefore, light sources or displays composed of LEDs can be easily controlled electronically to meet the needs of various applications, and there is no difficulty in compatibility with IC computers. In addition, the application of LED light sources is not limited by space in principle. It is highly malleable and can be extended arbitrarily to achieve building-block assembly. At present, the largest color display screen is LED.
(6) Green and environmentally friendly. Light sources made with LEDs do not contain environmental pollutants such as mercury and lead and will not pollute the environment. Therefore, it is no exaggeration to call LED light sources "green" light sources.
The difference between COB light source and LED light source:
LED light sources refer to surface-mounted light-emitting diodes, which have a large light-emitting angle, up to 120-160 degrees. Compared with early plug-in packages, they have high efficiency, good precision, low false soldering rate, light weight, and small size.
COB light source means that the chip is directly bonded and packaged on the entire substrate, that is, N chips are continuously integrated together for packaging on the inner substrate. It is mainly used to solve the problem of manufacturing high-power LED lights with low-power chips. It 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, soft light, and a uniformly distributed light surface.
In general, COB light source is a light source that is more cost-effective and has better performance than LED light source.
