[High-tech LED reporter / Wang Cairong] This year, LED commercial lighting and engineering lighting market are rapidly picking up. In the increasingly fierce market competition, the comprehensive performance competition of various LED lighting companies has become one of the key factors to win the market. Among them, the problem of heat dissipation of lamps has always been one of the bottlenecks to be solved.
In general, less than 30% of LED lamps work into light energy, and about 70% of energy is converted into heat. If this part of the heat energy cannot be dissipated in time, the light source will burn out, and the junction temperature will rise, the life will be reduced, and the luminous flux will decrease. For LED lighting fixtures, it is especially important to choose a radiator with excellent performance.
On the morning of November 26th, the 2013 Gaogong LED assembly package sponsored by Zhongwei Optoelectronics Co., Ltd., Han Ruizhong, Marketing Director of Beijing Ruide Sang Energy Saving Technology Co., Ltd. (hereinafter “Rui Desang Energy Savingâ€) will focus on “How to choose A good LED radiator" to give a keynote speech.
"In a normal temperature and stable environment, the heat dissipation effect depends mainly on the thermal conductivity and heat dissipation rate of the material selected for the heat sink, the heat dissipation area of ​​the heat sink, and the temperature difference between the heat sink and the surrounding environment." Han Junzhong said. To choose a good LED heat sink, you should mainly consider the heat sink material, heat sink structure and the core technology of the heat sink.
According to Han Junzhong's view, the most important thing to measure the quality of a radiator is to look at its core technology - heat transfer capability. Only when the heat sink has good heat transfer capability can the heat sink have a good average temperature. Sex. The significance of the temperature uniformity is that it can make a large temperature difference between all parts of the heat sink and the whole environment.
According to the law of cooling, when there is a temperature difference between the surface of the object and the surrounding area, the heat dissipated from the unit area per unit time is proportional to the temperature difference, that is, the larger the overall temperature difference with the surrounding, the better the heat dissipation effect.
Han Junzhong believes that the reason why the whole is emphasized is that as a heat sink, if only the part in contact with the light source has a high temperature and is limited by the thermal conductivity of the material, the temperature away from the light source will gradually decrease until it is not in temperature difference with the surrounding shape. This part of the heat dissipation area is wasted. In the same space volume, it is better than the heat sink with good temperature uniformity.
In addition, Han Junzhong also stressed that the most important point in selecting a high-performance heat sink depends on whether the radiator supplier has an overall thermal management solution. Because the radiator is only an important part of thermal management, but it does not mean all, there are many other points to be aware of, including the maturity of the overall thermal management solution, which can be measured by the barrel theory, that is, the effect is not to look at you. How prominent, but depends on whether you have a fatal short board.
“For example, in some short-term special high-temperature conditions, in order to protect the light source from irreversible damage, can it be adjusted by means of power supply; the thermal conductivity of the heat-conducting medium between the light source and the heat sink is not high or the life cannot meet the requirements. Replace with other media, etc." Han Junzhong said that LED products are important, but the overall service level is more important, because the end customer needs a perfect, reliable product.
In general, less than 30% of LED lamps work into light energy, and about 70% of energy is converted into heat. If this part of the heat energy cannot be dissipated in time, the light source will burn out, and the junction temperature will rise, the life will be reduced, and the luminous flux will decrease. For LED lighting fixtures, it is especially important to choose a radiator with excellent performance.
On the morning of November 26th, the 2013 Gaogong LED assembly package sponsored by Zhongwei Optoelectronics Co., Ltd., Han Ruizhong, Marketing Director of Beijing Ruide Sang Energy Saving Technology Co., Ltd. (hereinafter “Rui Desang Energy Savingâ€) will focus on “How to choose A good LED radiator" to give a keynote speech.
"In a normal temperature and stable environment, the heat dissipation effect depends mainly on the thermal conductivity and heat dissipation rate of the material selected for the heat sink, the heat dissipation area of ​​the heat sink, and the temperature difference between the heat sink and the surrounding environment." Han Junzhong said. To choose a good LED heat sink, you should mainly consider the heat sink material, heat sink structure and the core technology of the heat sink.
According to Han Junzhong's view, the most important thing to measure the quality of a radiator is to look at its core technology - heat transfer capability. Only when the heat sink has good heat transfer capability can the heat sink have a good average temperature. Sex. The significance of the temperature uniformity is that it can make a large temperature difference between all parts of the heat sink and the whole environment.
According to the law of cooling, when there is a temperature difference between the surface of the object and the surrounding area, the heat dissipated from the unit area per unit time is proportional to the temperature difference, that is, the larger the overall temperature difference with the surrounding, the better the heat dissipation effect.
Han Junzhong believes that the reason why the whole is emphasized is that as a heat sink, if only the part in contact with the light source has a high temperature and is limited by the thermal conductivity of the material, the temperature away from the light source will gradually decrease until it is not in temperature difference with the surrounding shape. This part of the heat dissipation area is wasted. In the same space volume, it is better than the heat sink with good temperature uniformity.
In addition, Han Junzhong also stressed that the most important point in selecting a high-performance heat sink depends on whether the radiator supplier has an overall thermal management solution. Because the radiator is only an important part of thermal management, but it does not mean all, there are many other points to be aware of, including the maturity of the overall thermal management solution, which can be measured by the barrel theory, that is, the effect is not to look at you. How prominent, but depends on whether you have a fatal short board.
“For example, in some short-term special high-temperature conditions, in order to protect the light source from irreversible damage, can it be adjusted by means of power supply; the thermal conductivity of the heat-conducting medium between the light source and the heat sink is not high or the life cannot meet the requirements. Replace with other media, etc." Han Junzhong said that LED products are important, but the overall service level is more important, because the end customer needs a perfect, reliable product.
| In the third field, the name of the photo title: Packaged Devices, Equipment and Materials II | ||
| November 26th, 09:00-12:00 , Conference Room D, Hall 5, Guangzhou Poly World Trade Center | ||
| Moderator: Dr. Jin Peng Professor, Peking University Shenzhen Graduate School | ||
| Time Time | Topic | Speaker Speaker |
| 09:00-09:20 | Keynote Speech: LED Light (with) Intelligent Automation Manufacturing Technology 1. What is intelligent automated manufacturing? 2. Technical components 3. Technical transformation business operation examples | Zhao Hongbo Zhongwei Photoelectric General Manager of Instrumentation Division |
| 09:20-09:40 | Keynote Speech: LED Technology Innovation and Market Demand 1. LED technology innovation 2. LED market demand | Gao Jiwei Hang Ke Optoelectronics Technical Director |
| 09:40-10:00 | Keynote Speech: COB Device Development Trends 1. The future of the top ten packaging technology trends 2. COB device technology trends | Gong Wen Jingtai Optoelectronics General Manager |
| 10:00-10:20 | Keynote Speech: PA10T - New Solution for Bright LED Reflector Cup Materials 1. PA10T material and its application advantages in LED reflector cup 2. Application of blonde PA10T material on LED reflector cup | Yi Qingfeng Blonde Technology LED Division technical director |
| 10:20-10:40 | Keynote Speech: Research Status of LED Phosphors and Application of New Phosphors in Lighting 1. Four major challenges for LED general lighting and phosphor lifting solutions 2. LED phosphor selection criteria 3. Common synthetic methods for LED phosphors | Bean sail Chairman of Hilde |
| 10:40-10:50 | Break time | |
| 10:50-11:10 | Keynote Speech: LED Lamp Cost Analysis and Material Selection Development Direction 1. Advantages and disadvantages of aluminum-plastic pipe 2. Advantages and disadvantages of glass tubes 3. The advantages of plastic pipe | Li Yang General Manager of Xinlong Optoelectronics |
| 11:10-11:30 | Keynote Speech: LED Phosphor "Light Quality" Rapid Development 1. Development of phosphors in the field of lighting 2. Development in the field of phosphor display 3. The direction of rapid development of phosphors in the future | Summer day Senior engineer with research rare earth |
| 11:30-11:50 | Keynote Speech: How to choose a good LED radiator 1. The material of the LED heat sink 2. Structure of LED radiator 3. The core technology of LED radiator | Han Junzhong Radsang Energy Technology Marketing Director |
| 11:50-12:10 | Keynote Speech: Application and Influence of Nano Graphene Thermal Conductive Materials in LED General Lighting 1. Good lights in the eyes of ordinary people? 2. Why is thermal conductive plastic the inevitable heat dissipation choice for LED general lighting? 3. In LED lighting, why use plastic instead of aluminum alloy? | Dong Pei Feitai Technology Chairman |
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