According to market research firm iSuppli, manufacturers have launched mobile phones using active matrix organic light-emitting diode (AM? COLED) main screen, which is expected to push the display market to explode in the next few years.
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   Between 2009 and 2015, shipments of OLED displays, which serve as the main screen for mobile phones, are expected to grow sevenfold. In 2015, global OLED mobile phone main screen shipments will increase from 22.2 million in 2009 to 178 million.
   “AM-OLEDs offer superior image quality compared to traditional LCDs, especially in terms of contrast and response time,†said Vinita Jakhanwal, principal analyst of iSuppli's small and medium display business. “The power consumption is also low. This will extend battery life. As smartphones become increasingly the consumer's primary Internet access device, the ubiquity of AM-OLEDs and the ability to extend working hours make them an attractive choice for smartphones."
   Although the growth momentum is so strong, the proportion of OLEDs in total mobile phone main screen shipments will remain at a low level in the next few years. In 2013, it is expected to account for 6% of total unit shipments, up from 2% in 2009. . The only factor limiting the expansion of OLEDs is the limited number of suppliers and factories in the AM-OLED market.
   Nokia's new N85 is a new generation of mobile phones with a relatively large OLED main screen. The N85 features a 2.6-inch AM-OLED display with a pixel format of 240 x 320. iSuppli conducted a disassemble analysis of the N85. The cost of the AM-OLED is estimated to be $7.05, while the cost of a liquid crystal display of the same size and resolution is $6.50.
   Other new phones with AM-OLED main screens include Samsung's Impression and i8000 Omnia II. According to Jakhanwal, some OLED-enabled handsets, mainly PM-OLED technology, have only served as a secondary screen for mobile phones due to their inherent limitations in size and resolution.
   According to Jakhanwal, AM-OLED can achieve QVGA, WQVGA and higher resolution pixel formats, so it is suitable for serving as the main screen of a larger mobile phone. The recent price decline and the improvement of the yield have also made AM-OLED economical in the main screen application of mobile phones.
   Because of this, the main screen of mobile phones will surpass the secondary screen from 2010 and become the largest application area of ​​OLED, and will stay ahead until 2015. The OLED home screen is an attractive growth opportunity compared to the overall market dominated by LCD technology. From 2009 to 2015, the unitized annual growth rate (CAGR) of unit shipments of global OLED mobile phone main screens will reach 41.4%, compared with 8% for all types of mobile phone screens from 2009 to 2013.
   In addition to being used in smartphones, manufacturers may also use AM-OLEDs as a 2.2- to 2.6-inch QVGA home screen for traditional handsets, especially if their production and price are comparable to LCDs. Among other advantages, OLED technology is more environmentally friendly than traditional LCDs.
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