The innovation and achievement of LED emergency lighting integration technology

As China's sustained rapid economic growth, increasing energy consumption, energy shortage has become increasingly prominent contradictions. The research and development of energy efficient, long-life semiconductor lighting products "was included in the national long-term science and technology development plan (2006-2020)" energy "and" energy saving "areas of priority themes, the development of the semiconductor lighting industry in China is ushering in independent innovation, realize the leap forward development of great historical opportunity.

Major natural disasters, snow and earthquake occurred successively in 2008 in southern China power outages, seriously affecting people's lives and disaster relief work, emergency lighting products is particularly important in disaster relief, medical aid, especially LED has a series of advantages of small volume, long service life, high efficiency, low voltage, use safety and energy saving, so the Ministry of science and technology "LED emergency lighting, drive technology and system reliability as research and development for the 2008 863 issue.

First, the importance of LED emergency lighting applications

Emergency lighting is an important safety facility for modern public buildings and industrial buildings. When building fires or other disasters, power outages, emergency lighting, evacuation of fire and rescue work, the important work to continue production, handling operation or necessary, have an important role. Through the application of LED lighting products development and application, can change China's current integration products daily lighting and emergency lighting shortage, can not guarantee the living requirements of the production situation in case of emergency; combined with the implementation of national energy-saving emission reduction targets, should develop a series of civil emergency lighting semiconductor lighting products, such products not only meet the requirements of energy conservation in daily in use, to provide illumination and lighting time enough in the event of an emergency, for the rescue of property and repair of electric power system, escape. To develop the lighting products with the function of generating electricity in the special emergency environment, to achieve the goal of easy to use, can be used for many times, and has the function of self protection.

Fire, earthquake and other natural disasters, emergency lighting is a necessary equipment for escape, disaster relief, is expected within the next 3 years with emergency function of semiconductor lighting series products market demand will be more than 2 billion yuan. With the development of China's economy, the social security awareness and safety standards have been greatly improved, and the requirements for emergency lighting products are also getting higher and higher. This requires not only to meet the emergency needs of such products, but also with energy saving, human nature, high reliability and other performance, and the biggest advantage of emergency semiconductor lighting is here. At the same time, with the development of economy and society in China, the demand for lighting, such as disaster relief, field construction, and the harsh environment, becomes more and more urgent.

The aim of the research on the high efficiency driving technology and system reliability of emergency lighting is to promote the development of the industry, to break through the key technology of LED lighting application and to improve the industry chain of the semiconductor lighting industry. Through the application of lighting system design, two optical design, heat dissipation design, light source structure design, drive circuit and so on, we can promote the large-scale application of domestic devices.

The main research of emergency lighting LED light source LED development, emergency lighting, emergency lighting design LED two optical design and thermal design of emergency lighting, special driving power and intelligent control system development etc..

The main assessment index for the luminous efficiency of more than 100lm/W and LED light source: thermal resistance is not higher than 9 DEG /W, lamp luminous efficiency is more than 80lm/W, color: 3000-6000K; color index: = 80; power factor greater than 0.9, the total harmonic distortion is less than or equal to 20%, the power conversion efficiency is more than 80%.

2010 project completion, luminaire efficiency reached 80lm/W, patent 5-10, can meet the urgent needs of the earthquake relief, field exploration, military and other emergency lighting field, help solve security emergency lighting, emergency lighting products to establish perennial supply mechanism, implemented in the demonstration and application of disaster reconstruction and development of the western region, the construction of new countryside so, to accelerate the effective promotion of energy-saving emission reduction, improve the international competitiveness of the semiconductor lighting industry in china.

Two, LED emergency lighting integration technology research difficulties and innovation

The application of LED in emergency lighting or just started, remains to be studied for structure design of driving circuit design, emergency function selection and emergency lighting, especially in the study of reliability of emergency lighting and emergency lighting standards is lagging behind. The main technical difficulties are as follows:

1.LED packaging technology: scientific and reasonable LED packaging structure is the key to improve the efficiency of LED light source and photoelectric conversion efficiency. Therefore, according to the LED emergency lighting requirements reasonable design of LED package structure, to minimize light, is difficult to meet the cooling requirements of LED light source design.

2.LED heat dissipation technology: LED packaging heat dissipation has become a key factor restricting the development of high-power LED. In order to effectively solve the heat dissipation problem of high power LED, will use the packaging materials and effective heat dissipation without deterioration, LED will effectively heat conduction, and solve the problem of decay.

3 two light distribution technology parameters: emergency lighting is the most important to meet the indoor lighting and emergency lighting requirements, the main parameters are the average illuminance, illumination uniformity and maintain lighting time, through the two light emitting optical design, combined with LED