After years of development, at present, the global LED lighting technology has developed from the pursuit of light efficiency to the improvement of light quality, light quality and multi-functional applications, and the industry has gradually shifted from technology-driven to application-driven. The scale of the industry continues to expand, and the field of market application continues to expand, gradually expanding from lighting and display to automotive, medical, agricultural and other fields. The product quality has been steadily improved, and the energy-saving effect of semiconductor lighting has been significantly improved compared with traditional lighting.