With the sustained and rapid growth of China's economy, energy consumption is increasing, and the contradiction of energy shortage is becoming increasingly prominent. "Research and development of high-efficiency, energy-saving, long-life semiconductor lighting products" is included in the national medium- and long-term scientific and technological development plan (2006-2020) "energy" field "industrial energy saving" priority theme, the development of China's semiconductor lighting industry is welcoming from the main A major historical opportunity for innovation and leapfrog development. First, the importance of LED emergency lighting applications Emergency lighting is an important safety facility for modern public buildings and industrial buildings. It is closely related to personal safety and building safety. When a building has a fire or other disaster, and the power supply is interrupted, the emergency lighting has an important role in personnel evacuation, fire rescue work, and the continued operation or necessary operation and disposal of important production and work. Through the research and development and application of LED lighting application products, it can change the current situation that China's current daily lighting and emergency lighting integration products are scarce and can not guarantee the production and living requirements in an emergency; combined with the implementation of national energy conservation and emission reduction targets, a series of civilian applications should be developed. Emergency semiconductor lighting products, in addition to meeting energy-saving requirements in daily use, provide sufficient illumination and lighting time in emergency situations to escape, rescue and repair power systems. Develop lighting products with built-in power generation function in special emergency environment, which is easy to carry and use, can be recycled many times, and has its own protection function. When natural disasters such as fires and earthquakes occur, emergency lighting is an essential equipment for escape and disaster relief. It is expected that the market demand for semiconductor lighting series applications with emergency functions will exceed 2 billion yuan in the next three years. With the development of China's economy, the safety awareness and safety standards of the society have been greatly improved, and the requirements for emergency lighting products are also getting higher and higher. This not only requires such products to meet emergency needs, but also has the performance of energy saving, humanization, high reliability, and the biggest advantage of emergency semiconductor lighting is here. At the same time, with the development of China's economy and society, the demand for lighting in disaster relief, field construction and off-grid and harsh environments is increasing, and there is also a huge market demand for emergency semiconductor lighting products. The goal of the "Emergency Lighting Efficient Drive Technology and System Reliability Research" project is to promote development by application, break through the key industrialization technologies urgently needed for LED lighting applications, and improve the semiconductor lighting industry chain. Through the integration of lighting technology design, secondary optical design, thermal design, light source structure design, drive circuit and other application technology systems, the scaled application of domestically produced devices in domestic products is promoted. It mainly studies the development of LED light source for emergency lighting, the design of LED emergency lighting, the secondary optical light distribution design of LED emergency lighting, the overall heat dissipation design, the special drive power for emergency lighting and the development of intelligent control system. When the 2010 project is completed, the luminaire efficiency will reach 80lm/W, and 5-10 patents will be applied to meet the urgent needs of earthquake relief, field exploration, military and other emergency lighting fields, and help to solve the lighting protection for emergencies. Perennial emergency lighting product supply mechanism, to achieve demonstration applications in disaster area reconstruction, western development, new rural construction, etc., accelerate the effective promotion of energy conservation and emission reduction, and enhance the international competitiveness of China's semiconductor lighting industry. Second, the difficulty and innovation of LED emergency lighting integration technology research The application of LED in emergency lighting is still just beginning. The design of the drive circuit, the selection of emergency functions and the structural design of the emergency luminaire need to be studied, especially in the emergency lighting standard and the reliability research of the emergency luminaire. The main technical difficulties are as follows: 1. LED packaging technology: Scientific and reasonable LED packaging structure is the key to improve the light extraction efficiency and photoelectric conversion efficiency of LED light source. Therefore, according to the requirements of LED emergency lighting fixtures, a reasonable LED package structure is designed to minimize the light decay, and meeting the heat dissipation requirements is a difficult point in the design of LED light sources. 2, LED cooling technology: LED packaging heat dissipation has become a key factor restricting the development of high-power LED. In order to effectively solve the problem of heat dissipation of high-power LEDs, effective heat dissipation and non-degradation of packaging materials will be adopted to effectively conduct LED heat and solve the problem of light decay. 3, secondary light distribution technology: the most important parameters of emergency lighting fixtures are to meet the requirements of indoor lighting and emergency lighting, the main parameters are average illumination, illumination uniformity and maintenance of illumination time, through secondary optical design, combined with LED illumination Features, designed to meet the optical requirements of the optical requirements to meet the requirements of emergency lighting. 4, LED intelligent control technology: from the characteristics of LED light source, research digital intelligent control mode and drive power. Study the best control method suitable for emergency lighting mode requirements; study the control methods combined with various sensors, research the driving power supply for emergency lighting source and the reliable conversion technology of emergency power supply.
In 2008, major natural disasters such as ice and snow and earthquakes occurred in the southern part of China, and power interruptions have seriously affected the disaster relief work and the lives of people in the disaster areas. Emergency lighting products are particularly important in disaster relief and medical rescue, especially LEDs have small size. Long life, high efficiency, low voltage, safe use, energy saving and other advantages, so the Ministry of Science and Technology will "LED emergency lighting efficient drive technology and system reliability research" as the 2008 863 project for research and development.
The main evaluation indicators are the luminous efficiency of LED light source ≥100lm/W, thermal resistance: ≤9°C/W, luminous efficiency of lamps ≥80lm/W, color temperature: 3000-6000K; color rendering index: ≥80; power factor ≥0.9, Current total harmonic distortion ≤ 20%, power conversion efficiency ≥ 80%.
5. Preparation and drafting of emergency lighting fixture detection methods, reliability evaluation methods and related standard specifications.