LED technology energy-saving intelligent trend and challenges
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LED lighting has the advantages of energy saving, environmental protection, longevity, earthquake resistance, small size and fast response. At present, the LED application field mainly includes three major markets: backlight, general lighting and automotive lighting. As the price of LED lights declines, 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 brightness adjustment, color temperature adjustment, soft start of light, timing control, scene setting, etc., and achieves the requirements of individuality, comfort, secondary energy saving, safety and efficiency.
1. Opportunities and Challenges LED lighting has many outstanding advantages: energy-saving DC drive, electro-optical power conversion is close to 100%, the same lighting effect is more than 80% energy saving than traditional light source; long service life can reach 60,000 to 100,000 hours, than traditional The life of the light source is more than 10 times longer; the color change mostly utilizes the three primary colors of red, green and blue. Under the control of computer technology, the three colors have 256 gray levels and can be mixed arbitrarily, which can generate 25625625616777216 colors; environmental protection has neither heat nor No radiation, small glare, recyclable, no mercury, cold light source, safe touch; high-tech low-voltage microelectronics, computer technology, network communication technology, image processing technology, embedded control technology, etc., is a semiconductor optoelectronic device Digital information products with online programming, unlimited upgrades, and flexible features. The price of LED lighting is relatively higher than that of traditional light sources, which has become one of the obstacles for LEDs to enter the market. In addition, overcapacity has also led to fierce competition in the LED market. The key driver for the development of the LED lighting market is the emergence of high-brightness LEDs and smart LED controllers. Product designers using high-brightness LEDs face many design challenges, including thermal management, drive solutions, topology, and infrastructure.
2. Market Trends As far as the current level of industry development is concerned, LED lighting does not have enough capacity to break the traditional lighting concept and still stay on the alternative route. In the alternative route, LED lighting must also rely on government policy guidelines. That is to say, although some of the LED lighting has developed to a sufficient degree of maturity, it is still at a preliminary stage of the initial stage relative to the entire market.
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With the continuous advancement of LED lighting technology, LEDs are gradually being used in the field of automotive lighting. LED R&D vendors for automotive applications are highly motivated, and LEDs do attract the automotive market with its uniqueness. I.ED light source has many advantages in automotive applications: low energy consumption, long life, various forms, high recognition, good impact resistance, easy layout and design, fast response, high brightness, and low brightness degradation. Halogen lamp, low-voltage DC can drive LED, small load, weak interference, low requirements on the use environment. These factors are obviously beneficial to energy conservation and driving safety. LED lights are spreading towards civilian models. For the more demanding headlights, it will also become popular with the increase of LED brightness and the gradual decline of price. Intelligent applications are also a potential advantage of LEDs. Future LED lighting is not about bringing higher light efficiency, but better light. In the car, intelligent lighting is a popular trend in the future, such as adjusting the brightness of the light as needed, and automatically adjusting the interior lighting with external light. Cars that use LED lighting are not just growing in markets such as Europe. In China, new energy vehicles have entered the 12th Five-Year Plan of China, which is part of the national low-carbon, energy-saving and environmental protection industries. It is in line with the national industrial support policy and belongs to one of the areas of LED industry extension.
2.2 Internet of Things and Intelligent Lighting In addition to high light efficiency, light quality, thin size and intelligent control system will be the focus of future LED lighting development. If there is a very significant growth in the LED field, it must be the smart lighting market. Intelligent lighting refers to the distributed wireless telemetry, remote control and remote control system composed of computer, wireless data transmission, spread spectrum power carrier communication technology, computer intelligent information processing and energy-saving electrical control technology to realize the lighting equipment. Intelligent control, with the brightness intensity adjustment, light soft start, timing control, scene setting and other functions, to achieve safety, energy saving, comfort and efficiency. It requires advanced control, including programmable performance, spectrum control, and environmental integration. At present, this is probably 13% of the total LED market of 2 billion US dollars, but it is expected to double in 2014.
Intelligent LED lighting control requires precise control of the brightness of the light. Programmable intelligent control cores are commonly used in architectural systems to receive inputs from light sources and motion sensors as well as panels. Such systems can generally be programmed by the user to plan different times and areas throughout the day, provide different levels of illumination, and may vary according to different dates of the week.
The key to this control is to adjust the brightness of the LEDs using an optimal light output range and stability mechanism while optimizing the lumens per watt over the dimming range and providing high power factor and low AC line harmonics. To achieve true intelligence, the lights must be able to sense the surrounding environment and react locally to environmental changes. The drivers themselves are not smart, and lighting fixtures are currently not capable of local sensing, so they are not smart enough. The entire industry only uses LED lights as a substitute for photons, but the reality is that there are more and more LED control devices, and they all bring a new approach to LED lighting. The future development trend is to include sensors and intelligent decision-making schemes in the production of spare lamps, and to adjust the operation mode to meet the needs of users, and the lighting switches will cease to exist.