In 2017, the light emitting diode ( 领导) Continue to maintain rapid growth, complete production 6409. 800 million only. Guangdong province is light emitting diode ( 领导) At present the country's largest production areas, accounting for more than 69% of the total national output, second is fujian, jiangsu, zhejiang, anhui in turn. Demand for LED lighting industry in China in 2017 about 542. 2 billion, 2016 in 411. 3 billion compared to the increased by only 31. 83%, LED lighting industry in China in recent years, the demand situation as shown in the figure below: at present, the LED in the downstream application market is the largest lighting area, followed by a backlight application and display. Display scale still maintain a relatively stable trend of rapid growth, especially with the mature of small spacing LED display technology, LED display applications will gradually from the large size display application to indoor, outdoor applications will significantly expand, is expected in the next few years will remain very high speed growth, so as to make the LED display in the proportion in the whole industry chain downstream application gradually enhanced. Leds are referred to as the fourth generation of lighting source or green light source, energy saving, environmental protection and long life, small volume, is widely used in all kinds of instructions, display, adornment, back light, general lighting and urban night scene, and other fields. According to the different use function, it can be divided into information display, light, automotive lamps and lanterns, LCD back light, general lighting five categories. According to statistics, in 2010, LED application industry in our country is 90 billion yuan, to the LED application industry growth in 2017 to 534. 3 billion yuan.