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OLED Display Technology

   The rapid development of the new display, OLED is the tube, semiconductor integrated circuits, also formed a large-scale electronic devices industries, and its scope of application covered color television sets, computers, big screen, calculator, games, PDAs, cell phones and outdoor big Screen Display, and so on. OLED display technology and new products related industries accounted for the information industry output value of more than 30%, as the electronic information industry one of the foundation industry, its development speed, technical levels, a direct impact on the entire electronic information industry development.
   Display Technology has driven the continued progress shown leaping development of the industry. More emphasis thin display market, high-quality, humane, and other functions. From the traditional black-and-white, color, Chao-ping, Flat Screen CRT monitors, to the present grade LCD, PDP flat panel display, revealed that the size of the ever-strengthening industry. OLED display technology has been the rapid development of LCD and PDP shaken the dominant position will become highly competitive field of the future revealed that the star.
   OLED display technology is a very young display technology, according to the use of organic semiconductor materials can be broadly divided into small molecular devices and polymer devices (PLED) two. Small molecule OLED technology development early, and therefore also more mature technology. Polymer devices (PLED) development began in 1990, due to spin-coated polymer can be used, methods such as ink-jet printing of film, and could thus greatly reducing the cost of production devices, but the technology is far from mature.
   Because OLED with high brightness, wide viewing angles, fast response and easy to achieve high-resolution full-color display, low voltage DC-driven, low-power, luminous efficiency is high, the temperature characteristic wide, well-resistant harsh environment capacity advantages, but low cost, simple manufacturing process, so it is applicable to cell phones, PDAs, digital cameras, DVD, GPRS, and other small size, its industry prospects are under the general concern of all countries in the world. OLED display technology in the past 10 years of time has made tremendous progress. Current fluorescent luminous efficiency of small molecule device has been more than 16 lm/w, and small molecule phosphor luminescence efficiency devices have been close to 30 lm/w; to launch full-color OLED companies and research units more and more, using low-temperature polycrystalline silicon full-color TFT-driven device has been developed out; white OLED received broad attention has been made of white devices in 100 cd/m2 brightness can be maintained longer. Organic light emitting display technology basically fulfill the requirements of practical applications, particularly in luminous efficiency, in terms of OLED far higher than the PDP level.
   At present, OLED technology to meet the practical requirements, and the technology advantages not play in the material, color, large size, flexibility shown IC, Packaging and production processes, and other areas there is room for improvement. In the long term, the future development of OLED will be along the small size, the size, large size, large size; monochrome, multicolor, color; passive, active screen hard, soft screen direction, the best Monitors should be TFT-AM-OLED.
Global OLED industry has developed rapidly
   With OLED displays more and more used to replace the phone's LCD screen, in 2003 the global OLED display panel market sales income reached 251 million US dollars, and by 2004 the global market OLED display panel sales revenues exceeded 408 million US dollars, up 63 percent. ISuppli forecasts, the global OLED display panel market in 2005 sales will reach 615 million US dollars, than the 2004 growth of 50.7%.
   In 2004, global sales of OLED display panels for 31 million, almost 2003 of 16.8 million sales has doubled.
   In 2004, Samsung SDI in the global OLED display panel market ranked first, accounting for market share of 44 percent, more than the vanguard of the Japanese company.
   In 2004, the global OLED display panel market sales of 89 per cent from the mobile phone market. In the next 10 years, cell phones will always be the biggest OLED display applications market.
   According to Display Search the latest statistics, in 2005 the third quarter of the global OLED shipments of 16.7 million, the total output value reached 130.9 million US dollars, than the same period last year 144 percent. Forecast to 2008, the global OLED industry is expected rapid growth to 22 billion dollars.
   The current global production has OLED at least a number of production lines, pilot lines, as many as have dozens of. OLED in the international research and development and the industrialization of more than 100 companies, of which part of the company has already begun mass production. Japanese manufacturers of OLED technology in an early start to the northeast, headed by Pioneer, TDK, Sanyo, Sony, Seiko - Epson, NEC, and other manufacturers in the development of OLED technology have cast many efforts. In many European and American companies have invested R & D, such as: CDT, Kodak, DuPont, UDC, eMagin, PHILIPS, South Korea has Samsung, LG, Hyundai 10 more than enterprises that get involved in the OLED industry, the Taiwan region has to Po, Tung Yuen laser, AUO, Sheng Park 14 manufacturers into the OLED industry.
   OLED developed rapidly in recent years, the 2001 Sony and Samsung were successfully developed 13 and 15.1 inches active organic light-emitting display, 2002 Toshiba successfully developed 17-inch TFT OLED prototype, the 2003 Sony introduced a 24-inch TFT OLED sample, 2004 Seiko Epson developed a 40-inch organic electroluminescent display panels.
Development of OLED industry in China
   In 2003, the domestic semiconductor letter Lee introduced a small batches OLED production line, the ongoing product and market development, in October 2005 operation, the main production Passive OLED.
   Tsinghua University was established in 1996 OLED project team engaged in OLED technology research, the Chinese mainland has completed the first OLED pilot lines. Shanghai Guangdian in years OLED technology research, in the 2005 first quarter completed pilot lines for small batch production. Shanghai University in 1990 began OLED research, developed a green and white light-emitting device matrix display. Jilin University, starting in 1994 in the development of new materials and properties of OLED research carried out in-depth research system in the new electroluminescent material complex there has been some innovative results.
   On November 6, 2005, Qinghua University and Beijing-dimensional letter Connaught established companies in the Mainland of China Kunshan first OLED mass production lines, the amount of investment is estimated to reach 750 million yuan. Qinghua University and the Victoria letter Connaught industrialization of OLED development planning includes two phases: the first phase construction of two small and medium size OLED production lines, from 2005 to 2006 the building of the first large-scale OLED production line in 2008 after re-building a second production line, the main products used in cell phones, MP3 players, car displays and digital cameras, the two production lines after the production opened, with an annual output of small and medium size OLED devices will reach 20 million or so, the annual output value of about 1.2 billion yuan. The second phase will be based on the market and technical developments, in 2008 after the investment and construction of a large-size OLED production line, product development to 10 inches above the full-color displays.
The core technology has been a breakthrough
   At present, China's OLED technology and the overall level of industrialization and abroad are still about two years gap, but in some core technology already has advanced international level, and have achieved some results.
   The device structure, the structure of China's development of the single-layer device to reduce the materials, equipment and process, the costs have been reduced;
   In materials, Jilin University launched a three-state properties of the phosphor materials, and Tsinghua University Connaught peacekeeping letter jointly developed red light materials were high luminance;
   In the area of color OLED, China has also developed a 260,000-color OLED samples have to catch up with the world level.
The gap with international standards
   Despite this significant progress, but compared with international standards, China's OLED technology and industrialization of certain gaps still exist:
In the area of intellectual property rights
   OLED materials and low molecular structure of the basic patents in the United States mainly Kodak grasp the hands of some patents will be expired, but a series of follow-up of its patents, still formed a relatively complete patent system. PLED materials and macromolecular structure of the main master basic patents in the United Kingdom and the United States CDT companies such as DuPont hands. In active driver, Japan's Sanyo, Sharp, SEL, Eldis South Korea's Samsung, LG, Taiwan's ITRI mastered a certain amount of core patents. China's Tsinghua University and peacekeeping letter Connaught has applied for the 42 domestic and foreign OLED patents, Jilin University and Changchun Ray Machine Station the application of 10. These patents cover OLED materials, device structure, process technology, and drive technology. Internationally, OLED patent holders in the late 1980s of not more than five, has now developed to the more than 200, the constant breakthroughs in core technologies, making the patent holder complementary growing stronger and stronger, not only can a company With its own proprietary technology will be able to produce the most advanced products, intellectual property cooperation inevitable.
On the technical side
   With the international forefront of organic light-emitting display technology, China still exist some obvious technological gap. Outstanding performance: organic light-emitting red-green-blue color materials solutions are imperfect, can not provide a practical Blu-ray luminous materials; phosphorescent material RGB color of the material has not yet practical development success.
In the production equipment
   China did not OLED production equipment manufacturers, the key equipment in Japan, South Korea, European enterprises hands. In addition ITO glass, photoresist, and other raw materials, there are similar problems.
In production
   Since China's TFT technology development lags behind, a panel of technology weak, inadequate production management experience accumulated, OLED Active in the development of the production process it is quite difficult, but also a lack of production and management talent, this is the industrialization of China's OLED construction weaknesses . In short, China's OLED downstream industrial chain is not yet complete, high-quality OLED technology and management talent shortage, the government and business-to - OLED insufficient capital investment are all factors restricting China's industrial progress.
The driver IC area
   Global has been engaged in a number of companies in the OLED driver IC design and production, while China only imported from abroad driver ICs in large-size color screen and technical conditions due to relatively backward equipment, the relative lack of capital investment, with foreign development is a big gap between these areas and its shortcomings are restricted to a certain extent China's organic light-emitting display technology development.
   In 2006, the large-screen display market will continue to expand, the competition will continue to heat up, as in materials research, technology, production equipment, cost control, semiconductor technology and market application of the advances in the next three to five years will be OLED technology to mature and usher in the high growth phase. My OLED enterprises need to seize the opportunity to strengthen their self-development ability and speed up local manufacture and OLED mass production, improve the OLED industry chain.


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