LED technology energy-saving intelligent trend and challenges

LED lighting has the advantages of energy saving, environmental protection, longevity, earthquake resistance, small volume, fast response speed, etc. At present, LED application fields mainly include backlight, general lighting and vehicle lighting. As the price of LED lamps decreases, comfort and safety become the technical direction of semiconductor lighting. In addition, semiconductor lighting will open the era of intelligent lighting. Intelligent lighting has the functions of light brightness adjustment, color temperature adjustment, light soft start, timing control, scene setting, etc. , and meets the requirements of personalization, comfort, secondary energy saving, safety and efficiency. 1. Opportunities and challenges LED lighting has many outstanding advantages: energy-saving DC Drive, electro-optic power conversion close to 100, and the same lighting effect is more than 80 energy-saving than traditional light sources; Long service life up to 60 thousand ~ 100 thousand hours, more than 10 times longer than the traditional light source; The color change mostly uses the principle of red, green and blue three primary colors. Under the control of computer technology, the three colors have 256 gray levels and are randomly mixed to produce 25625625616777216 colors; Environmental protection has neither heat nor radiation, low glare, recyclable, mercury-free, cold light source, and safe touch; High-tech and low-voltage microelectronic products, integrating computer technology, network communication technology, image processing technology, embedded control technology, etc. , are digital information products of semiconductor optoelectronic devices, it has the characteristics of online programming, unlimited upgrade and flexibility. The price of LED lighting is relatively higher than that of traditional light sources, which has become one of the obstacles for LED to enter the market. In addition, overcapacity has also LED to fierce competition in the LED market. The key driving force to promote the development of LED lighting market is the emergence of high brightness LED and intelligent LED controller. Product designers with high-brightness LED face many design challenges, including thermal management, driving scheme, topology and infrastructure. 2. Market trend. In terms of the current level of industry development, LED lighting does not have enough ability to break the traditional lighting concept and still stays on the replacement route; In the replacement route, LED lighting must also rely on government policy guidelines. That is to say, although some of the LED lighting is developed to a sufficient degree of maturity, it is still in the embryonic stage of its infancy relative to the entire market. 2. 1 car [img] /uploads/allimg/140520/22-1405201132411 H. jpg [/img] With the continuous progress of LED lighting technology, LED is gradually applied in the field of automobile lighting. Led r & D manufacturers for automotive applications are highly motivated, and LED does attract the automotive market with its nature. I. The application of ED light source in automobile has many advantages: low energy consumption, long service life, various forms, high recognition, good impact resistance, convenient layout and modeling design, fast response speed and high brightness, the attenuation of light brightness is much lower than that of halogen lamp, and LED can be driven by low-voltage direct current, with small load, weak interference and low requirements on the use environment. These factors are obviously beneficial to energy conservation and driving safety. LED lights are spreading to civilian models. For headlights with higher requirements, they will also be widely used with the increase of LED brightness and the gradual decrease of price. Intelligent application is also a potential advantage of LED. Future LED lighting will not bring higher light efficiency, but better light. In automobiles, intelligent lighting is a popular trend in the future, such as adjusting the brightness and shade of lights as needed, and automatically adjusting the lights in cars with external light, etc. Cars using LED lighting are not only growing in markets such as Europe. In China, new energy vehicles have entered China's 12th Five-Year Plan, which is part of the National Low-carbon, energy-saving and environmental protection industries, conforms to the national industrial support policy, and belongs to one of the fields of LED industry extension. 2. 2 Internet of Things and intelligent lighting, in addition to high luminous efficiency, light quality, light size and intelligent control system will be the focus of LED lighting development in the future. If there is an LED field with significant growth, it must be the intelligent lighting market. Intelligent lighting refers to a distributed wireless telemetry, remote control and remote communication control system composed of computers, wireless data transmission, spread spectrum power carrier communication technology, computer intelligent information processing and energy-saving electrical control technologies, in order to realize the intelligent control of lighting equipment, it has the functions of light brightness adjustment, light soft start, timing control, scene setting and the like, and achieves the characteristics of safety, energy saving, comfort and high efficiency. It requires control, including programmable performance, spectrum control and environmental integration. At present, this is about 2 billion of the total amount of US dollars in the LED lighting market, but it is expected to double in 2014. Intelligent LED lighting control requires controlling the brightness of the light. Programmable Intelligent Control cores are commonly used in architecture systems to receive input from lamp sources, motion sensors and panels. This kind of system can generally be programmed by the user, planning different times and areas in the day, providing different lighting levels, and may change according to different dates of the week. The key of this kind of control is to adjust the brightness and darkness of the LED by using the mechanism of good light output range and stability, and at the same time to optimize lumens per watt in the dimming range, and provides high power factor and low AC line harmonic. To achieve true intelligence, the lighting must be able to sense the surrounding environment and make a local response to environmental changes. The driver itself is not intelligent, and lighting lamps cannot realize local induction at present, so they cannot realize intelligence. The whole industry only regards LED lamps as substitutes for photon generation, but the reality is that there are more and more LED control devices, which all bring new methods for LED lighting. The future development trend is to include sensors and intelligent decision-making schemes in the production of spare lamps, and to meet the needs of users by adjusting the operation mode, while the lighting switch will no longer exist.