[Source: "High-tech LED-lighting market" July issue / Xiong Yuheng]
Since the development of LED packaging technology, it has experienced the plug-in (DIP) packaging stage, the surface-mount (SMD) packaging stage, and now, is about to enter the latest COB integrated packaging stage.
The industry generally believes that the traditional plug-in package has low light efficiency and high light attenuation. Therefore, the surface-mount package replaces the plug-in package, which is regarded by the industry as a milestone in the road of LED and has become the mainstream of current packaging.
Survival of the fittest is the natural law, SMD can replace DIP as the mainstream of packaging, and its advantages can not be underestimated. However, DIP packaging can become the mainstream of stable packaging for half a century, and its advantages are unquestionable. Even now, in the outdoor display field, plug-in LEDs still occupy a significant share.
Therefore, under the background of the industry of DIP packaging, there are still many companies that are tilting their development focus to the DIP packaging field. Shuangqiang Lighting Technology Co., Ltd. (hereinafter referred to as "double-powered lighting") is one of the best. Recently, Gaogong LED reporter entered Shuangqiang Lighting, and discussed with Mr. Zhao Qiang, the general manager of the company, about plug-in LED related issues.
Advantages obvious plug-in LED lighting
Gaogong LED Reporter: As far as I know, plug-in LEDs are mostly used in outdoor display fields, and most of them are mainly SMD high-power. Double-powered lighting does not follow LED development. DIP is the main packaging method for company lighting products. What do you think are the advantages of plug-in LEDs for lighting?
Zhao Qiang: The development of plug-in LED packaging technology has been going on for about 60 years, and the related technology is very mature. First of all, the packaging method is considered quite thoughtful for all aspects of LED production; secondly, the material supply chain of the product is also very rich, the price is relatively stable, and the cost is relatively low.
In terms of technology, the plug-in LED has a small single power, a small driving current, and a high electro-optical conversion efficiency, and can be 130Lm/W in a large number of conventional shipments. At the same time, the plug-in LED generates less heat. In the application, as long as the density is controlled, the heat will be dispersed. As long as the shell design is carried out, the convection heat of the air can be fully considered to effectively solve the heat dissipation problem. Currently, plug-in LEDs use many advanced materials and processes in the manufacturing process. At an ambient temperature of 60 ° C, the light decay can be lower than the high power.
In addition, the plug-in LED has a small single power and its luminous intensity is not large. It can solve the problem of glare with different position adjustment and configuration. It can also reach the high-index finger by matching the lamp beads of different color temperatures. The color temperature is adjustable. The plug-in LED illumination angle can be made from 15 degrees to 150 degrees, and can be adapted to many occasions with special requirements.
The power supply of the plug-in LED can be combined with the voltage drop of multiple 3.0-3.4V LEDs, and the AC220V is rectified and filtered before linear constant current, which makes the driving of the LED simple, greatly reducing the cost and failure rate. The large-scale popularization of ordinary people's families provides strong technical and price guarantees.
Gaogong LED reporter: What are the advantages of Shuangqiang in doing plug-in LED?
Zhao Qiang: Since its establishment, Shuangqiang Lighting has always focused on plug-in LEDs and has many years of technology precipitation. From packaged chips to bracket phosphors, gold wire thickness, glue quality and other materials have strict requirements. The contractor's formula is adopted to effectively ensure the performance and reliability of the material. At the same time, the dual-intensity plug-in LED lamp bead is packaged with a large-sized chip, with high brightness and low light decay. Together with the power supply developed and produced by the company, it fully guarantees the high quality of the LED. The whole lighting fixture has reasonable price, good performance, lower failure rate and higher reliability. At present, the plug-in LED can also be mass-produced by using related equipment, and the production efficiency and the patch are basically the same, which is of great significance for the scale promotion of LED lighting.
SMD and COB packaging technology to be upgraded
Gaogong LED Reporter: The time for the establishment of Shuangqiang Lighting is not very long. The SMD has not become mainstream since the company was founded. It is understandable to locate the DIP package. Nowadays, SMD is popular, but the two strong players still insist on DIP not giving up. What is the reason? Zhao Qiang: SMD package solves the volume problem of LED and realizes the scale production of the machine.
However, if the heat dissipation problem of SMD is not effectively solved, the light decay will be very serious, which requires the enterprise to use an aluminum casing and an aluminum substrate to help dissipate heat, which invisibly increases the production cost of the lighting fixture.
At the same time, SMD package has a fatal shortcoming, that is, it is not resistant to moisture, and the glue encapsulated after moisture is easily deteriorated, resulting in greatly reduced light transmittance, resulting in serious light decay of LED lamps, and even more serious death lights. In addition, when SMD is applied to some special occasions, it is necessary to install a reflective bowl and a lens to achieve the same effect as the plug-in LED lamp, thereby increasing the manufacturing cost of the lamp, reducing the reliability, and high failure rate, which is not conducive to the popularization of LED lighting.
I believe that the current SMD technology is not fully mature, and plug-in LEDs have advantages in some application areas. In the future, plug-in LEDs may be replaced more by SMD, but will not be eliminated in the short term.
High-tech LED reporter: SMD packaging development is in the ascendant, COB integrated packaging has been put on the agenda by many companies. How do you view the current development of COB packaging technology?
Zhao Qiang: COB package concentrates multiple LED chips on the package substrate, which can effectively save LED package cost, light engine module production cost and secondary light distribution cost. In the same function lighting system, the light source cost can be reduced by about 30%. . However, COB package heat is concentrated. If the heat dissipation is not good, it will result in low light efficiency and severe glare.
In addition, when the COB package is connected, the gold wire is easily broken and the yield is low. When it is in the application, if there is a problem with a lamp bead, the whole lamp will be scrapped. COB also uses aluminum and aluminum substrates to help dissipate heat, and is currently only suitable for certain high-end locations.
Plug-in LED lighting fixtures do not need aluminum casing for heat dissipation. Ordinary epoxy PCB boards can meet the requirements. The combination is strong, and the advantages of adjustable plug-in angle can be fully utilized to reduce the cost of LED lighting and to make LED lighting popular. At the same time, the plug-in LED process is simple, the technology is mature, the reliability is high, and the fault is reduced. At present, the cost performance is very advantageous.
Since the development of LED packaging technology, it has experienced the plug-in (DIP) packaging stage, the surface-mount (SMD) packaging stage, and now, is about to enter the latest COB integrated packaging stage.
The industry generally believes that the traditional plug-in package has low light efficiency and high light attenuation. Therefore, the surface-mount package replaces the plug-in package, which is regarded by the industry as a milestone in the road of LED and has become the mainstream of current packaging.
Survival of the fittest is the natural law, SMD can replace DIP as the mainstream of packaging, and its advantages can not be underestimated. However, DIP packaging can become the mainstream of stable packaging for half a century, and its advantages are unquestionable. Even now, in the outdoor display field, plug-in LEDs still occupy a significant share.
Therefore, under the background of the industry of DIP packaging, there are still many companies that are tilting their development focus to the DIP packaging field. Shuangqiang Lighting Technology Co., Ltd. (hereinafter referred to as "double-powered lighting") is one of the best. Recently, Gaogong LED reporter entered Shuangqiang Lighting, and discussed with Mr. Zhao Qiang, the general manager of the company, about plug-in LED related issues.
Advantages obvious plug-in LED lighting
Gaogong LED Reporter: As far as I know, plug-in LEDs are mostly used in outdoor display fields, and most of them are mainly SMD high-power. Double-powered lighting does not follow LED development. DIP is the main packaging method for company lighting products. What do you think are the advantages of plug-in LEDs for lighting?
Zhao Qiang: The development of plug-in LED packaging technology has been going on for about 60 years, and the related technology is very mature. First of all, the packaging method is considered quite thoughtful for all aspects of LED production; secondly, the material supply chain of the product is also very rich, the price is relatively stable, and the cost is relatively low.
In terms of technology, the plug-in LED has a small single power, a small driving current, and a high electro-optical conversion efficiency, and can be 130Lm/W in a large number of conventional shipments. At the same time, the plug-in LED generates less heat. In the application, as long as the density is controlled, the heat will be dispersed. As long as the shell design is carried out, the convection heat of the air can be fully considered to effectively solve the heat dissipation problem. Currently, plug-in LEDs use many advanced materials and processes in the manufacturing process. At an ambient temperature of 60 ° C, the light decay can be lower than the high power.
In addition, the plug-in LED has a small single power and its luminous intensity is not large. It can solve the problem of glare with different position adjustment and configuration. It can also reach the high-index finger by matching the lamp beads of different color temperatures. The color temperature is adjustable. The plug-in LED illumination angle can be made from 15 degrees to 150 degrees, and can be adapted to many occasions with special requirements.
The power supply of the plug-in LED can be combined with the voltage drop of multiple 3.0-3.4V LEDs, and the AC220V is rectified and filtered before linear constant current, which makes the driving of the LED simple, greatly reducing the cost and failure rate. The large-scale popularization of ordinary people's families provides strong technical and price guarantees.
Gaogong LED reporter: What are the advantages of Shuangqiang in doing plug-in LED?
Zhao Qiang: Since its establishment, Shuangqiang Lighting has always focused on plug-in LEDs and has many years of technology precipitation. From packaged chips to bracket phosphors, gold wire thickness, glue quality and other materials have strict requirements. The contractor's formula is adopted to effectively ensure the performance and reliability of the material. At the same time, the dual-intensity plug-in LED lamp bead is packaged with a large-sized chip, with high brightness and low light decay. Together with the power supply developed and produced by the company, it fully guarantees the high quality of the LED. The whole lighting fixture has reasonable price, good performance, lower failure rate and higher reliability. At present, the plug-in LED can also be mass-produced by using related equipment, and the production efficiency and the patch are basically the same, which is of great significance for the scale promotion of LED lighting.
SMD and COB packaging technology to be upgraded
Gaogong LED Reporter: The time for the establishment of Shuangqiang Lighting is not very long. The SMD has not become mainstream since the company was founded. It is understandable to locate the DIP package. Nowadays, SMD is popular, but the two strong players still insist on DIP not giving up. What is the reason? Zhao Qiang: SMD package solves the volume problem of LED and realizes the scale production of the machine.
However, if the heat dissipation problem of SMD is not effectively solved, the light decay will be very serious, which requires the enterprise to use an aluminum casing and an aluminum substrate to help dissipate heat, which invisibly increases the production cost of the lighting fixture.
At the same time, SMD package has a fatal shortcoming, that is, it is not resistant to moisture, and the glue encapsulated after moisture is easily deteriorated, resulting in greatly reduced light transmittance, resulting in serious light decay of LED lamps, and even more serious death lights. In addition, when SMD is applied to some special occasions, it is necessary to install a reflective bowl and a lens to achieve the same effect as the plug-in LED lamp, thereby increasing the manufacturing cost of the lamp, reducing the reliability, and high failure rate, which is not conducive to the popularization of LED lighting.
I believe that the current SMD technology is not fully mature, and plug-in LEDs have advantages in some application areas. In the future, plug-in LEDs may be replaced more by SMD, but will not be eliminated in the short term.
High-tech LED reporter: SMD packaging development is in the ascendant, COB integrated packaging has been put on the agenda by many companies. How do you view the current development of COB packaging technology?
Zhao Qiang: COB package concentrates multiple LED chips on the package substrate, which can effectively save LED package cost, light engine module production cost and secondary light distribution cost. In the same function lighting system, the light source cost can be reduced by about 30%. . However, COB package heat is concentrated. If the heat dissipation is not good, it will result in low light efficiency and severe glare.
In addition, when the COB package is connected, the gold wire is easily broken and the yield is low. When it is in the application, if there is a problem with a lamp bead, the whole lamp will be scrapped. COB also uses aluminum and aluminum substrates to help dissipate heat, and is currently only suitable for certain high-end locations.
Plug-in LED lighting fixtures do not need aluminum casing for heat dissipation. Ordinary epoxy PCB boards can meet the requirements. The combination is strong, and the advantages of adjustable plug-in angle can be fully utilized to reduce the cost of LED lighting and to make LED lighting popular. At the same time, the plug-in LED process is simple, the technology is mature, the reliability is high, and the fault is reduced. At present, the cost performance is very advantageous.
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