LED filament lights gradually rise in the first half of 2015

In 2014, LED filament series products became a highlight both at the Frankfurt exhibition and at the Guangya Exhibition. The combination with traditional incandescent lamp technology, the realization of 360 lighting and the preference of Europeans and Americans for incandescent lamps have all attracted much attention. The fabrication of LED filament is a kind of packaging method which is to package multiple low-power LED chips in series on the substrate, connect them in series with gold wires, and coat and wrap the fluorescent powder. the filament substrate is mostly sapphire, and a few are glass or metal substrates. If LED filament is made with flip chip, its heat dissipation and light effect will be better. Therefore, at present, flip chip COB packaging is a good way to make LED filaments. With the in-depth research and improvement of LED filament manufacturing technology, LED filament application technology, glass bubble sealing bubble inflation technology and stroboscopic power supply technology, many incandescent lamp factories have successfully transformed and upgraded with this. began to enter the field of LED lighting. 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 category is traditional lighting and incandescent lamp manufacturing enterprises, including fozhao, Yaming, NVC, etc. One is LED lighting products manufacturing enterprises, including Dongshan lighting, Yapur, Yinjing Optoelectronics, etc. ; There is also a kind of LED packaging enterprises, including Zhongzhou, Hongli, hangke, Baishi, etc. The products of some enterprises have been publicly available, but there are not many real mass production. Some LED filament lamp products and photoelectric parameters sold on Taobao are shown in Table 1. The average luminous efficiency has exceeded 100Lm/W. The light colors are warm White, positive white and cold white. and the socket interface is E14 or E27, so the incandescent lamp can be directly replaced. CSAResearch thinks that because the LED filament lamp is the LED lighting product which is close to the incandescent lamp at present, and with the characteristics of full-angle light emitting, no need of lens and the production line which can make use of the incandescent lamp, if the problem of heat dissipation and cost is solved, the market will be promising in the replacement market under today's nostalgic retro trend.