Special Guest
Beijing Weixinuo Technology Co., Ltd. Senior Consultant Wan Boquan
Xie Qinyi, Deputy General Manager of DisplaySearch Greater China
Lin Jiaxing, Graphic Display Center, Taiwan Industrial Technology Research Institute
Qi Shenghua, general manager of Qijing Optoelectronics
Epson OLED related person in charge
Sharp Business (China) Co., Ltd.
Editor's Note: Since the 1990s, the growth of O LED technology has accelerated rapidly. In 1997, the first O LED product for car audio display was born. In 2007, Sony Corporation of Japan introduced an 11-inch OLED color TV. Its excellent performance highlights the huge application prospect of OLED in the field of large-size display. The OLED industry has been in use for 10 years, and the market size has reached more than 500 million US dollars. In the next 5-10 years, the compound annual growth rate will still maintain double-digit growth. The newspaper invites industry experts and representatives of leading manufacturers to discuss the hot applications and hot topics of OLED.
Large size application is the goal
With the continuous maturity of small and medium-sized OLED technology and industry, large-size OLED technology development and industrialization work is also ready to go.
After years of trials and failures, the OLED industry has also recognized that OLED development must move toward large-scale and flat-panel TV applications.
Wanboquan
The international community has attached great importance to this new flat panel display technology. On March 23, 2005, the Wall Street Journal announced three hot spots for venture capitalists to invest in the next round. OLED is one of them. For the large-scale color display field, AMOLED (Active Matrix OLED) technology has developed rapidly, and small and medium-sized products have been mass-produced and used in mobile phones, PMP and other products. Large-size products are also constantly sampling, especially the response from Sony's launch of the 11-inch OLED color TV in 2007. South Korea's Samsung, LG and other international companies have launched their own AMOLED product development schedule. According to the forecast data released by DisplaySearch, PMOLED (passive matrix OLED) will grow steadily in the future, and the AMOLED market will exceed PMOLED in 2012.
Visionox's breakthroughs in PMOLED technology, including breakthroughs in Kodak's patented new cathode technology and materials, new isolation column technology, multi-co-evaporated material film formation methods, and related process technologies, equipment patents, etc., have been in Kunshan, China An OLED production line has been applied above. It shows the full independent innovation ability of Visionox.
As we all know, the new flat panel display industry is booming, and OLEDs are not yet commercialized in terms of large size. However, with the continuous maturity of small and medium-sized OLED technologies and industries, large-size AMOLED technology development and industrialization work is also ready to go. Internationally, Japan and South Korea are competing to deploy large-size AMOLED industry. It can be said that the era of large-size OLED is coming.
Xie Qinyi
The market for small-size OLEDs (such as mobile phones' main screens and secondary screens) overlaps with TFT-LCDs (thin-film transistor liquid crystal displays). In the early days of OLED development, it faced the problem of overlapping with the TFT-LCD market. The characteristics of PMOLEDs are low-end. Application, the unit price is cheap, but the life of the organic light-emitting material is not as good as that of the LCD. In the initial market, there is no other application, and it must compete with the TFT-LCD in the same market, including the lower-end mobile sub-panel and MP3 portable. Player, etc. On the other hand, AMOLEDs cannot enter large sizes in a short period of time, so they must compete with TFT-LCDs in small and medium-sized markets such as mobile phone main panels, digital cameras, and portable entertainment devices. However, the overcapacity of TFT-LCD has caused many LCD manufacturers to quickly transfer the so-called old production line below the 4th generation line to the production of small-size LCD. Under the circumstances of depreciation and economic scale, it will cause great competitive pressure on OLED. Many OLEDs are even cheaper than TFT-LCDs to get the favor of customers. OLED can't find new flat panel display applications in time and the advantages of TFT-LCD in terms of capacity and technology maturity and cost have caused OLED's dilemma.
After years of experimentation and failure, the OLED industry has also recognized that OLED development must go to large-scale or even flat-panel TV applications. However, in order to achieve large-scale OLEDs, it is necessary to use a TFT-LCD as a backplane (BackPlane). AMOLED is the main direction of future development. The main way is to let the backplane of TFT-LCD drive AMOLED. The mature technology and mass production scale of TFT-LCD can be turned into AMOLED, so that AMOLED can get rid of current and small. The dilemma of the size TFT-LCD melee has turned into a large-scale.
Park Sheng
OLEDs are considered to be the best choice for next-generation flat panel displays due to their self-illumination, light weight, wide viewing angle, high contrast, low power consumption and high response speed. However, the related technology of OLED is not as mature as TFT-LCD, so there are still many difficulties to be overcome in the future market development.
OLED is divided into passive (PM) OLED and active (AM) OLED according to the driving mode of illuminating. Since the PMOLED process is simple and the cost is low, many manufacturers are not required for color and resolution, and replace TN. Applications such as /STN-LCD (twisted/super-twisted liquid crystal display) and VFD (vacuum fluorescent display) are entry points, including mobile phones, personal digital assistants (PDAs), portable game consoles, automotive displays, electronic dictionaries, etc. Other consumer electronics products provide PMOLED products; while AMOLEDs are better suited for large-size development due to better quality, so some large manufacturers, such as Sony and Samsung, use active OLED technology to produce high-resolution, large-size products. The main high-information full-color display applications are targeted at major application areas such as personal digital assistants, digital cameras, computer screens, notebook computer screens or televisions.
At present, Qijing Optoelectronics has completely abandoned the PMOLED product line, and concentrates on research and development and manufacture of AMOLED products with better quality and higher technical difficulty. It will start from the application of small and medium-sized OLED panels, and further invest in the development of large-size OLEDTVs in the future.
Epson
Technically, compared with liquid crystal technology, OLED has the characteristics of simple panel structure, high thickness, high contrast, and fast response. The recent advances in liquid crystal technology are also targeting these areas, narrowing the technology gap. In terms of production, organic light-emitting materials of OLEDs have always had life problems. Especially in color OLED panels, RGB red, green and blue colors use different organic light-emitting materials, and the brightness decay period is different, which leads to the display being in use. A color change has occurred. Previously, the lifetime of full-color OLED display components was basically around 20,000 hours, which could only be used on mobile devices such as mobile phones, and could not be applied to mainstream flat panel displays such as televisions.
In research and development, Epson has been at the forefront of the world. As early as 2004, Epson took the lead in launching the world's largest 40-inch OLED display. Epson's latest research and development "the ultimate black" OLED display system solves the long-term problem of OLED's service life, and successfully extends the service life to more than 50,000 hours, breaking the technical bottleneck of 20,000 to 30,000 hours in the industry. , greatly expanding the application prospects of OLED display systems.
Sakai
While developing organic EL (OLED), we also often get the latest information on organic EL. After analyzing and researching these latest information, we believe that if we use organic EL technology to produce large-scale TV sets, there are still many issues to be solved in terms of product life, reliability, and mass production. The technology has not yet reached the stage of commercialization. Especially when using organic EL to produce large-size TV sets, in addition to the product life needs to be considered, it is also necessary to control the large screen without chromatic aberration to achieve uniformity and the like. In addition, the long-term reliability of the product is also very important. In order to overcome these problems, it is estimated that it will take some time.
Large-scale applications need to solve life problems
One of the major difficulties in the development of O-LED light source is life, but the lifetime of white-light OLED light source devices has been greatly improved in the past two years.
The service life of OLED display systems has always been a major problem. With the continuous breakthrough of technology, the life of OLED display system is gradually prolonged. After breaking through 50,000 hours, it indicates that OLED can be matured and applied to various display products.
Wanboquan
Although device lifetime is a major difficulty in the development of white OLED light sources, the lifetime of white OLED light source devices has been greatly improved in the past two years. The lifetime of white light devices developed by Konica Minolta Technology Center can reach 10,000 hours at an initial brightness of 1000 cd/m2. The luminescence lifetime of the white light device reported by Japan Idemitsu Kosan Co., Ltd. can reach 23,000 hours at an initial luminance of 1000 cd/m 2 .
In solid-state planar lighting applications, Visionox's low-cost white-light O LED lighting technology has made breakthroughs in terms of life and will be the first to be commercialized in the near future. Visionox's research on white OLED lighting is at the forefront of the international market and has achieved breakthrough results. In May of this year, Tsinghua University and Visionox announced that OLED white light illumination products have a lifetime of more than 100,000 hours at an initial brightness of 1000 cd/m2, which is the highest record in the global industry. Tsinghua University and Visionox focus on low-cost and long-life research in OLED lighting technology. They are also in the forefront of the commercial application of OLED white light illumination, and recently launched several samples of OLED special lighting fixtures. In terms of large size, Visionox has accumulated a large number of technical reserves and has also made long-term plans.
Lin Jiaxing
Although AMOLED can take advantage of thinness, high contrast, high response speed, wide color gamut and power saving, it still needs to compete directly with TFT-LCD with rapid display performance on the road of productization, and improve its large-area production. After the cost and longevity issues, there is a chance to have a place.
In the target market of OLED, the small-size panel below 5 inches is still the main application in the short term. In terms of large-size AMOLED displays, Sony is the most active in Japan. In addition to exhibiting 11-inch and 27-inch AMOLEDTV prototypes, it officially produced 11-inch OLEDTV products in December 2007.
Epson
Previously, the service life of OLED display systems has been a major problem. With the continuous breakthrough of technology, the life of OLED display system is gradually prolonged. After breaking through 50,000 hours, it indicates that OLED can be matured and applied to various display products.
From the current large-screen and finished product speed of OLED, the date of the decisive battle between OLED and LCD and PDP will continue to be postponed. Epson's high-quality OLED panel is expected to open a breakthrough in some professional applications. In the fields of image, automobile, high-quality display, etc., users who are sensitive to display quality will abandon the price factor and use OLED to improve their work efficiency or taste.
Sakai
When OLED technology is applied to large-scale TV sets, there are still many technical problems to be overcome in terms of product life, reliability and mass production: First, the service life is not long. After a mobile phone adopts OLED technology, if the light intensity is set to 150 candelas, its service life is 3 years (20,000 hours), and its lifetime is half of the current LCD screen. The second is the difficulty of achieving large-scale. Third, the screen produces black spots. At present, mobile phones using OLEDs appear to be dimmed quickly. To prevent black spots on the screen, try to extend the life of the product.
Park Sheng
OLED has full-color self-illuminating display, no need for backlight module, etc. The whole module is lighter and thinner than LCD. In addition, OLED has ultra-wide viewing angle, high contrast, good resolution and fast response, which is called future display. technology. These are the advantages of OLED, however, in terms of cost control, it is inferior to other display technologies.
Panels developed with OLED technology have been used for some time in digital cameras, mobile phones and other devices that use small screens. Although there are not many products using OLED panels on the market, OLEDs are not used in various application fields. Difficult, major manufacturers have also shown great determination to develop OLED technology and products, and look forward to competing with TFT-LCD.
OLED development requires a good industrial environment
OLEDs, which are in the technological growth period and in the early stage of industrialization, are characterized by technology and capital-intensive industries, and are also policy-intensive industries.
In order to spread the risk, many vendors' strategies have shifted from single-handedly to joint alliances.
Wanboquan
The flat panel display industry is a technology-intensive, capital-intensive industry. The OLED industry, which is in the technological growth period and in the early stage of industrialization, is not only characterized by technology and capital-intensive industries, but also a policy-intensive industry. Due to the large risks in the OLED industry in the early stage of technology growth and industrialization, the market financing ability of enterprises is relatively weak. The development of the OLED industry, whether it is research and development or production line construction, requires a large amount of capital investment. How to make OLED, a highly strategic industry with a high degree of technical relevance and industry-driven, out of the predicament? In this regard, South Korea, Japan, Germany, etc. have developed a development plan for the new flat panel display industry such as OLED, creating a good environment for the development of OLED. In the development of China's OLED technology, government departments at all levels have given considerable attention and support, laying a good foundation for the development of China's OLED industry from the aspects of technology and talents. This shortens the relationship between China's OLED R&D and industrialization. The distance has produced an important boost.
Xie Qinyi
At present, the TFT-LCD industry is gradually developing towards the big ones and the small ones, and OLEDs offer great opportunities for manufacturers who want to continue to enter the flat panel display industry and have no time to participate in the TFT-LCD industry. Many TV manufacturers that do not have built-in TFT-LCD panel production capacity, such as Sony, Hitachi, Toshiba, and Matsushita, have begun to re-develop OLEDs. At present, Sony and Toshiba have also announced plans for a new round of large-size AMOLED construction and mass production. In order to diversify risks and avoid repeating the same mistakes, many manufacturers' strategies have shifted from single-handedly to joint alliances. This kind of new contending situation also hopes to gradually get OLED out of the fate of beauty and mourning, and gradually move towards a new light, becoming a veritable dream display.
Epson
At present, there are three major problems in OLED productization: one is large screen, the other is product life, and the third is cost. Like the traditional display industry, the OLED industry is a technology- and capital-intensive industry with high barriers to entry. The main factors of competition are technological innovation capability, capital investment capability, market development capability, cost control capability, supply chain management capability and team building capability. Different from the traditional display industry, OLED technology is still in the development stage, mainly in two aspects: First, OLED still has many key technologies in a blank state, unable to maximize the technical characteristics and advantages of OLED; Is product development or industrialization technology, there is still not a fully mature standard solution, OLED equipment has been able to meet large-scale production requirements, but there is no standardization, equipment manufacturers understand the OLED production technology is not as good as long-term research and development and pilot production experience. OLED industry.
Park Sheng
Whether the development of a new technology or a new product is complete or fast depends on the amount of resources invested in the entire market. Compared with the TFT-LCD industry, OLED manufacturers are not counting the number of vendors, capital, R&D manpower and time. It is relatively rare, and the technology adopted by OLED manufacturers is still inconsistent. This also makes it impossible to concentrate resources and achieve rapid development in the development of the entire industry chain, the development of raw materials and equipment. Recently, many manufacturers have announced that they will re-invest in the development of OLED technology. Japanese manufacturers have combined strategic alliances, which are expected to make the entire OLED market more mature. Recently, major international manufacturers have launched related applications or announced that they are about to launch panels with OLED technology. Obviously, manufacturers are still full of confidence.
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