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In 2014, LED filament products became a highlight in both the Frankfurt exhibition and the Guangya exhibition. The perfect combination of traditional incandescent lamp technology, the realization of 360 lighting, and the preference of Europeans and Americans for incandescent lamps have made LED filament lamps attract more attention. The manufacture of LED filaments is a packaging method in which a plurality of low-power LED chips are packaged in series on a substrate, which are connected in series by a gold wire, and the phosphor coating is wrapped. The filament substrate is mostly sapphire, and a few are glass or metal substrates. . If the LED filament is made with a flip chip, its heat dissipation and light efficiency will be better. Therefore, the current flip chip COB package is the best method for LED filament fabrication. With the in-depth research and complete improvement of LED filament manufacturing technology, LED filament application technology, glass bubble encapsulation and non-strobo power technology, many incandescent lamps have successfully transformed and upgraded into LED lighting field. At present, there are more than dozens of manufacturers involved in the field of LED filament lamps in China. These manufacturers are mainly divided into three categories, one is traditional lighting and incandescent lamp manufacturing enterprises, including Buddha Photo, Yaming, NVC, etc. LED lighting products manufacturing enterprises, including Dongshan Lighting, Yapu Er, Yinjing Optoelectronics, etc.; and one type of LED packaging companies, including Zhongzhou, Hongli, Hangke, Baishi and so on. Some of the company's products have been publicly available, but not much to achieve mass production. Some of the LED filament lamp products and photoelectric parameters sold in Taobao are shown in Table 1. The average luminous efficiency has exceeded 100Lm/W, the light color is warm white, white, cool white, and the lamp socket interface is E14 or E27, so Direct replacement of incandescent lamps. CSAResearch believes that because LED filament lamps are currently the closest LED lighting products to incandescent lamps, combined with features such as full-angle illumination, no lens, and incandescent lamp production lines, if the heat dissipation and cost issues are solved, today's nostalgic retro trend There will be great market prospects in the replacement market below.