With the progress and development of society, energy and environmental issues have increasingly become the focus of the world. Energy conservation and environmental protection have increasingly become the main driving force of social progress. In people’s daily life, the demand for lighting power accounts for a very large proportion of the total power consumption, but the existing traditional lighting methods have defects such as large power consumption, short service life, low conversion efficiency and environmental pollution, which are not in line with the purpose of saving energy and protecting the environment in modern society, Therefore, a new lighting mode that meets the needs of social development is needed to replace the traditional lighting mode.

Through the continuous efforts of researchers, a green lighting mode with longer service life, high conversion efficiency and low environmental pollution, namely semiconductor white light emitting diode (WLED), has been prepared. Compared with the traditional lighting mode, WLED has the advantages of high efficiency, no mercury pollution, low carbon emission, long service life, small volume and energy saving, This makes it widely used in transportation, lighting display, medical devices and electronic products.

At the same time, LED has been recognized as the most valuable new light source in the 21st century. Under the same lighting conditions, the energy consumption of WLED is equivalent to 50% of that of fluorescent lamps and 20% of that of incandescent lamps. At present, the global traditional lighting power consumption accounts for about 13% of the world’s total energy consumption. If WLED is used to replace the global traditional lighting source, the energy consumption will be reduced by about half, with remarkable energy-saving effect and objective economic benefits.

At present, white light emitting diode (WLED), known as the fourth generation lighting device, has attracted much attention because of its excellent performance. People have gradually strengthened the research on white LED, and its equipment is widely used in many fields such as display and lighting.

In 1993, Gan blue light emitting diode (LED) technology made a breakthrough for the first time, which promoted the development of LED. At first, researchers used Gan as the blue light source and realized the white light emission of a single led by using the phosphor conversion method, which accelerated the pace of LED entering the lighting field.

The biggest application of WLED is in the field of household lighting, but according to the current research situation, WLED still has great problems. In order to make WLED enter our life as soon as possible, we need to constantly improve and improve its luminous efficiency, color rendering and service life. Although the current LED light source can not completely replace the traditional light source used by human beings, with the development of science and technology, LED lamps will become more and more popular.