[Source: "High-tech LED - Technology and Applications" September issue]
As a new type of energy-saving and environmentally-friendly green light source, LED is bound to be the future development trend. It is called the fourth generation of new light source revolution, with the advantages of green and energy saving. However, the high luminous efficiency and low cost restricts the LED light source to replace the traditional lighting; at the same time, for the LED field, consumers should simply replace the traditional lighting, such as energy-saving lamps, incandescent lamps, etc., LED light sources must be modular, integrated, standardization. In this way, the cost will be optimized, the most popular, and standardized throughout the replacement process.
First, the comparison between traditional packaging and COB packaging
The so-called traditional packaging method is the package form of a single LED device, such as 3528, 3014, 5630, 5050, etc. currently used in the market; the COB module package is an integrated packaging method. (As follows: Table 1)
Table I:
Second, the comparison between traditional COB structure and NEO-NEON COB structure
The reason why LEDs heat up is because electrical energy is not completely converted into light energy, and part of it is converted into heat energy. The conversion of electrical energy to light energy is about 30%, which means that some of the electrical energy is converted into heat. Specifically, the LED junction temperature is caused by two factors. One aspect is the internal quantum effect. When electrons and holes recombine, photons cannot be generated 100%, and the recombination rate of carriers in the PN region is reduced. The leakage current multiplied by the voltage is the power of this part, that is, converted into heat energy, but This part does not occupy the main component, because the internal photon efficiency is now close to 90%; the other is the external quantum effect, the internally generated photons can not be effectively emitted to the outside of the chip and finally converted into heat, this part is the main, large Some of them are converted into heat. Although the incandescent lamp has a very low luminous efficiency of only about 15 lm/W, it converts almost all of its electrical energy into light energy and radiates it. Because most of the radiant energy is infrared, the light efficiency is low, but it is exempted. The problem of heat dissipation. The heat dissipation of LEDs is now more and more important to people. This is because the light decay of LEDs or their lifetime is directly related to their junction temperature. The heat dissipation is not good, the junction temperature is high and the lifetime is short. (As follows: Table 2)
Table II:
Unfinished
For more information, please refer to the September issue of "High-tech LED-Technology and Applications"
As a new type of energy-saving and environmentally-friendly green light source, LED is bound to be the future development trend. It is called the fourth generation of new light source revolution, with the advantages of green and energy saving. However, the high luminous efficiency and low cost restricts the LED light source to replace the traditional lighting; at the same time, for the LED field, consumers should simply replace the traditional lighting, such as energy-saving lamps, incandescent lamps, etc., LED light sources must be modular, integrated, standardization. In this way, the cost will be optimized, the most popular, and standardized throughout the replacement process.
First, the comparison between traditional packaging and COB packaging
The so-called traditional packaging method is the package form of a single LED device, such as 3528, 3014, 5630, 5050, etc. currently used in the market; the COB module package is an integrated packaging method. (As follows: Table 1)
Table I:
Figure 1:
The above-mentioned Figure 1 compares in detail the traditional conduction mode of the LED and the heat conduction channel in the COB module application. It can be clearly seen that the COB structure heat dissipation channel is more direct and the thermal resistance is lower.
Second, the comparison between traditional COB structure and NEO-NEON COB structure
The reason why LEDs heat up is because electrical energy is not completely converted into light energy, and part of it is converted into heat energy. The conversion of electrical energy to light energy is about 30%, which means that some of the electrical energy is converted into heat. Specifically, the LED junction temperature is caused by two factors. One aspect is the internal quantum effect. When electrons and holes recombine, photons cannot be generated 100%, and the recombination rate of carriers in the PN region is reduced. The leakage current multiplied by the voltage is the power of this part, that is, converted into heat energy, but This part does not occupy the main component, because the internal photon efficiency is now close to 90%; the other is the external quantum effect, the internally generated photons can not be effectively emitted to the outside of the chip and finally converted into heat, this part is the main, large Some of them are converted into heat. Although the incandescent lamp has a very low luminous efficiency of only about 15 lm/W, it converts almost all of its electrical energy into light energy and radiates it. Because most of the radiant energy is infrared, the light efficiency is low, but it is exempted. The problem of heat dissipation. The heat dissipation of LEDs is now more and more important to people. This is because the light decay of LEDs or their lifetime is directly related to their junction temperature. The heat dissipation is not good, the junction temperature is high and the lifetime is short. (As follows: Table 2)
Table II:
Unfinished
For more information, please refer to the September issue of "High-tech LED-Technology and Applications"
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