After years of development, at present, 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 has been continuously expanded, and the market application fields have been continuously expanded, from lighting and display to automobile, medical, and agricultural fields. Product quality has steadily improved, and semiconductor lighting has significantly improved energy saving compared to traditional lighting.