As a light source of illumination, the traditional light source will not die, but it will fade out. In the near future, LED will be the mainstream light source. This is basically not the case 10 years ago, but it is estimated that few people do not believe it. . The impact of LED as a mainstream light source is on the surface of the industry, but the development of the lighting discipline is equally large.
Before the LED, the mainstream light source is a heat radiation source, a low-pressure discharge source and a high-intensity discharge source, and the main purpose of the light source is the visual illumination (in order to be consistent with the existing saying, the visual illumination is referred to as illumination below). Due to the inflexibility in space, such as scale, spectrum and time, the focus of the lighting discipline is the material basis light source of illumination. After the research of the light source is mature, the lighting discipline has basically no major development. We have seen that the lighting discipline has a lot of research results in the first half of the 20th century, but in the CIE1931, CIE1964 and CIE1976 chroma systems, after the last major development in 1974, the color rendering index was determined, there was little progress in the lighting discipline. Even approaching the lighting project. This is mainly because the material base light source of illumination is too inflexible. In other words, there are several kinds of light sources, and it is enough to study their application. Therefore, the main research after this is to develop a new light source, and as the mainstream gas discharge source after the heat radiation source, the focus of research is to find a new luminescent substance, or a secondary illuminating method. But LEDs have become the mainstream source of lighting, which will make a big difference in this situation:
(1) The main indicators and prices of LED devices have not yet reached the maturity of technology, especially green LEDs are subject to further technological advancement. Therefore, for a period of time, the development of LED technology will still be an important part of our lighting discipline. However, LEDs have been developed to be available in many fields. Therefore, the focus of the lighting discipline will gradually return to the illumination, that is, the application of the light source, but not the light source itself.
(2) The high degree of flexibility of LEDs will create a huge research opportunity for future lighting disciplines. Because the high flexibility of LEDs will create a broad application area for LEDs, and in various applications, there is an optimal application choice due to the high flexibility of LEDs. This is an academic problem, that is, research opportunities. A typical example is LED plant fill light, which is similar to the human eye because of different wavelength V() values. Plant fill light also has different fill light efficiencies at different wavelengths, that is, there is a concept of so-called light formula. The current research is still in its infancy.
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