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>> Flexible OLED panels will grow rapidly in the next five years 13th,Dec,2017
As the consumer electronics products such as smart phones, smart bracelets, TVs, computers and the like are rapidly developing in the direction of thinness, portability and intelligence, their display screens also undergo rapid evolution and iteration of spherical screens, flat screens and flexible screens. In the era of spherical screen, CRT is the only choice; in the era of flat screen, LCD has become a well-deserved king; in the future era of flexible screen OLED has the advantages of simple structure, ultra-thin, high color saturation and contrast, low power consumption, easy Achieve the advantages of flexible display, a industry and academia investment and research focus.
Flexible OLED panels will grow rapidly in the next five years
In recent years, the use of OLED as the screen of smart phones, smart bracelets, smart watches, television and other products showed rapid growth. In the main battlefield of smart phones, more and more high-end machines use Oled displays, especially flexible OLED screens. According to statistics, China's large-scale use of smart phones OLED screen began in 2016 smart phones OLED screen penetration rate reached 12%. As Apple plans to upgrade its LCD screen to an OLED screen from 2017 to 2018, the upstream and downstream industries at home and abroad are also actively involved in the layout of related industries, and the OLED market is booming. Flexible OLED display panel in the next 5 years to maintain rapid growth momentum, the compound annual growth rate will reach 30% or more, its market size will reach 40 billion US dollars by 2020 or more, OLED screen in the smart phone market penetration will be Over 50%.
There are two mainstream OLED production technology lines
From the technical point of view, mainstream OLED production technology lines can be divided into two types: LTPS-TFT driving RGB LED OLED pixels, and Oxide-TFT driving white OLED pixels Glow and get RGB pixels through the Color Filter. The former is mainly used for small-size display, on behalf of enterprises for the Samsung; the latter is mainly used for large-size display, on behalf of enterprises LG.
Samsung uses LTPS technology, mainly around the smart phone with small-size OLED screen technology in force, from the Galaxy S to Galaxy S7, the screen resolution has been enhanced from 218ppi to 2K (577ppi), OLED mobile phone is expected to reach the future resolution may be achieved 800ppi or so.
LTPS technology has the advantages of high mobility and low power consumption, and is beneficial to mobile terminal devices such as smart phones that are powered by batteries. However, the LTPS itself is a polycrystalline structure with poor uniformity and must be laser annealed and ion implanted High cost of technology, resulting in high product costs, and difficult to apply to large-size panel production.
LG Oxide technology, mainly because of Oxide amorphous structure, easy to achieve large-scale, low-cost preparation, can be used in the field of large-size OLED TVs; However, LG currently uses IGZO (Oxide material) technology TFT backplane mobility Low (~ 10cm2 / Vs), resulting in higher power consumption. If the mobility of Oxide TFT can be greatly improved, the disadvantage of high power consumption can be reversed and it is expected to gain competitive advantages in small size markets such as smart phones. Especially in the field of flexible OLED display, the production temperature of LTPS is up to 450 ° C., which is a severe test for flexible substrate materials and manufacturing processes, and the cost is high. However, the production temperature of Oxide can be as low as 350 ° C., Simple and low cost, greatly reducing the demand for raw materials, is conducive to expanding the localization rate of raw materials and key equipment is an effective way to catch up with China.
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