Analysis of the ten major trends in the development of LED lighting technology

　　1. The mainstream lighting source will turn to LED

　　At present, the luminous efficacy of high-power LED commercial products has reached more than 150lm/W, and the life span has reached more than 30,000 hours. These have made the comprehensive performance of LED surpass other light sources.

　　At the same time, except for the high power, the price of LED lamps is close to that of lamps composed of other light sources. Therefore, relatively speaking, LED has certain advantages. At the same time, the light efficiency of LED laboratory products has reached more than 300lm/W, and through reasonable heat dissipation design, a lifespan of more than 50,000 hours is completely achievable. In principle, there is not much room for improvement in light efficiency and lifespan of other light sources. Therefore, it can be expected that LED will become the mainstream light source in the lighting market in the near future.

　　2. Research on LED device technology will focus on improving the efficiency of green LEDs

　　LED is the core device of semiconductor lighting technology. Currently, red LED and blue LED have high photoelectric efficiency, but green LED has low photoelectric efficiency. This limits the substantial application of LED spectrum flexibility. Therefore, improving the light efficiency of green LED is the most important research topic of LED devices. However, the current GaN-based LED technology route has encountered a great technical bottleneck, and both the existing technology route and the innovative technology route need to be studied.

　　3. Another research on LED device technology will be the research on narrow spectrum LED devices

　　The narrow spectral width of a single LED will help to truly realize the infinite flexibility of assembling LED spectra. This will make the application prospects of LEDs more extensive. At the same time, in LED display, one of the main applications of LEDs at present, if the spectral width of monochromatic LEDs can be reduced, a larger color gamut space can be achieved. This is a large application field.

　4. White light LEDs　for general lighting will gradually shift to RGB mode

　　The light sources used for general lighting are all presented in the form of white light or near white light. At present, the most cost-effective and mainstream white light LEDs on the market are all realized by adding blue light LEDs to YAG phosphors . However, in theory, the RGB method has higher light efficiency, and the use of the RGB method will enable the lamps to be dimmed, adjusted in color, and even adjusted in color rendering index. Therefore, with the improvement of the light efficiency of green light LEDs, it is believed that the RGB method (further extended to 3 or more single-color LEDs mixed in color) will become the mainstream white light LED mode.

　　5. The characterization of the color rendering of light sources will be a long-term debate process, and the characterization in the form of spectrum may be the ultimate result.

　　At present, the parameter that characterizes the color rendering of light sources is mainly the color rendering index. However, this is based on the limited spectral form of traditional light sources. The infinite flexibility of LED spectrum will cause problems in this characterization. It can be expected that if LED achieves true infinite spectral flexibility, then any single-parameter color rendering characterization will actually be flawed, and the ultimate characterization method should be the spectrum itself.

　　6. The application of light sources will include two basic aspects: visual application and non-visual application.

　　LED's flexibility in spectral assembly enables various visual and non-visual optimization applications to be realized through spectral assembly, such as agricultural lighting, medical lighting, LED visible light communication, etc. However, relatively speaking, there are still many problems to be solved in the application of LED in non-visual fields, including: what kind of lighting conditions are the most optimized, and the price of LED needs to be further reduced. The former is a scientific problem, while the latter is an industrialization problem.

　　7. Lighting technology will be deeply integrated with information technology to create smart lighting

　　LED is easy to control and is a semiconductor device. In addition, lamps are related to human life. That is, where there are people, there must be lamps. Therefore, lamps are a good physical carrier of information technology. Therefore, LED can be deeply integrated with information technology, and smart lighting will be born. This will be an important development direction of LED lighting technology in the future.

　　8. The appearance of lamps will have great innovation potential

　　At present, most LED lamps , including LED bulbs, LED downlights , LED tubes, etc., are designed to cater to people's consumption habits, and whether this is the optimal mechanical form of lamps remains to be studied. At least, there is a lot of room for innovation in the future mechanical form of LED lamps.

　　9. OLED will occupy an important position in the display field

　　Compared with LED, which emits light as a point light source, OLED emits light as a surface light source. Therefore, after LED occupies the vast majority of the lighting application (visual and non-visual applications) market in the future, OLED still has certain advantages in the display field.

　　10. Natural light will be valued

　　In recent years, energy-saving lighting, healthy lighting and ecological lighting have received great attention. Using sunlight for lighting is naturally the best choice. Therefore, it is believed that with the advancement of technology, natural light lighting will receive more and more attention.

　　Due to the great flexibility of LED in terms of scale, spectrum and time, the development of LED in the future may give birth to many innovative applications and concepts, which is worth looking forward to. This is the development trend of lighting based on artificial light sources. At the same time, as people's green and environmental protection ecological concepts continue to deepen, natural light lighting will also gain greater development.