COB integrated light source and LED light source are two kinds of lights that are very famous in today's lamp industry, the difference is that LED integrated light source is generally the use of 1 watt or more large size high-power LED chip, chip size is generally 30MIL or more. The COB light source is mainly based on a low-power LED chip of less than 1 watt, and a very small number of COB light sources will also use a high-power LED chip of more than 1 watt. However, there are some similarities in their overall characteristics, which are analyzed in detail here.

COB integrated light source features

The integration of a number of low-power LED light sources into a stand to get the light source is the integrated light source. Generally refers to the CHIP on Board this package form, is commonly known as cob package, that is, a number of chips directly attached to the substrate, in the use of silicone, epoxy resin or other materials packaged together, yellow is phosphor, the main problem in lighting applications is the heat caused by phosphor volatilizing and lens aging problems. COB integrated light source is widely used in LED bulb, LED lamp cup, LED spot light, LED downlight, LED sky lamp, LED bean lamp products, is one of the mainstream trends of LED lighting source. COB integrated light source mainly has the following characteristics:

1, can be freely matched and combined to form a variety of LED lamps, easy to assemble.

2, high reliability, no dead light, no plaque.

3, uniform light, soft light, no glare, no damage to the eyes.

4, high color rendering index, high light efficiency.

5, in the normal current, the attenuation is minimal, and the control is less than 3% within 1000H.

6, safe and reliable, all work below 50V, for the application of the certification has been fully considered.

7, green environmental protection, no pollution.

LED, high efficiency and energy saving effect, has been given the title of green lighting. Analysis of LED lighting products, COB integrated light source as a light-emitting element, has been the core of LED development, the understanding of COB integrated light source can be divided into several aspects, first of all, the substrate surface with thermal epoxy resin (generally with silver doped epoxy resin) covering the silicon placement point, and then the silicon directly placed on the substrate surface, Heat treatment until the silicon wafer is firmly fixed to the substrate, and then a direct electrical connection is established between the silicon wafer and the substrate by wire welding. The ceramic substrate has a higher reflectivity than the traditional aluminum substrate, which helps to improve the light efficiency. Ceramics have the characteristics of high reliability and long life. The coefficient of thermal expansion and contraction of ceramics is small, and the surface is relatively flat even in high temperature environments, which helps to dissipate heat. Easy to assemble, the ceramic substrate cob light source can be directly assembled on the heat sink through the thermal glue. The high thermal conductivity of the ceramic can ensure that the optical LED has the industry-leading thermal lumen maintenance rate (95%), and the ceramic is an insulator, which helps the LED lighting products pass various high voltage tests and can withstand high voltage 4000v or more.

LED light source characteristics

LED light source is light emitting diode (LED) light source, with high efficiency, long life characteristics. LED light source mainly has ring light source, strip light source, linear light source, back light source, external coaxial reflection light source, internal coaxial point light source, half spherical ridge cover light source and so on.

With the continuous deepening of research on semiconductor luminous materials, the continuous progress of LED manufacturing process and the development and application of new materials (nitride crystals and phosphors), ultra-high brightness leds of various colors have made breakthroughs, and their luminous efficiency has been improved a lot, and chromaticity has achieved all colors in the visible light band. One of the most important is the emergence of ultra-high brightness white leds, which makes it possible to cross the LED application field to the high-efficiency lighting source market. It has been pointed out that high brightness LED will be one of the great inventions after Edison invented incandescent light bulbs.

1, high luminous efficiency, LED after decades of technical improvement, its luminous efficiency has been greatly improved. Moreover, its light has good monochromaticity and narrow spectrum, and can emit colored visible light directly without filtering.

2, less power consumption

3, long service life, the use of electronic light field radiation light, filament light easy to burn, thermal deposition, light attenuation and other shortcomings. The use of LED light small size, light weight, epoxy resin packaging, can withstand high strength mechanical shock and vibration, not easy to break.

4, strong safety and reliability, low heat, no thermal radiation, cold light source, can be safe to touch: can accurately control the light type and luminous Angle, soft light color, no glare; It does not contain mercury, sodium and other substances that may harm health. The built-in microprocessing system can control the luminous intensity, adjust the luminous mode, and realize the combination of light and art.

5, conducive to environmental protection LED for all solid luminous body, shock resistance, impact resistance is not easy to break, waste can be recycled, no pollution. The light source is small, can be combined at will, easy to develop into light, thin, short and small lighting products, but also easy to install and maintain.

Above is the COB integrated light source characteristics, LED light source characteristics detailed analysis, the difference between the two lights I believe you also understand, below to recommend Liyang photoelectric led light source and cob integrated light source, quality assurance.