With the application of OLED panel in iPhone X, which is start to be sold on Nov. 3rd, the global overall market volume of OLED used in smart phones, TVs, smart watches etc., is 473.8 million pieces, increases 12.3% in 2017. Based on the situation that Apple will enlarge the use of OLED panel in the future and Chinese manufacturers emulate the practice of Apple, it is estimated the global overall market volume of OLED will grow rapidly in 2018, and the number can reach to 635.5 million pieces, increase 34.1%.