OLED technology now and in the future

songrisi

OLED technology now and in the future [Copy link]

At the opening ceremony of the 2008 Beijing Olympic Games, LED (light-emitting diode) technology was used extensively to decorate the opening ceremony performance beautifully. The LED screen on the central floor of the "Bird's Nest" venue, the LED decorative lights on the performers, the LED Olympic rings rising in the air, the large LED screen on the stands of the "Bird's Nest" venue, etc., have all become the focus of world attention. Science and technology are developing rapidly. In the field of solid-state lighting and display, although LED technology is still in its infancy, the newer generation of lighting and display technology OLED has developed rapidly. Fantastic display technology OLED (organic light emitting display technology) refers to the technology of organic materials emitting light under the action of electric field. LED is also an electro-optical conversion device, but it uses inorganic materials. It can be seen that OLED and LED are both different and related. The same thing is that both can be used in the fields of display and lighting. The difference is that in the field of lighting, due to structural limitations, LED is a point light source, while OLED is a plane light source; in the field of display, LED display screen is a display device composed of light-emitting diodes, which cannot display high-resolution images, while OLED is a display device composed of a photolithography electrode substrate and an organic light-emitting material, which can achieve high-resolution images. OLED has many advantages such as full solid state, active light emission, and high contrast. It is called "fantastic display technology" by experts in the flat panel display industry at home and abroad. The international community has attached great importance to this new flat panel display technology. In 2005, OLED was listed as one of the 25 most influential innovative technologies for mankind in the past 25 years by CNN (Cable News Network) of the United States; in 2006, OLED was ranked third among the top ten strategic technologies by market research company Gartner. In 1997, the first OLED product for car audio display was born. So far, OLED display screens have been widely used in small and medium-sized display fields such as mobile phones, digital cameras, MP3, MP4, audio, instruments and meters, and will soon be expanded to large-size display and flexible display fields such as notebook computer monitors and color TVs. In 2007, Sony Corporation of Japan launched an 11-inch OLED color TV, which was the first to realize the application of OLED in the field of television. Its excellent picture quality characteristics demonstrate the huge application prospects of OLED in the field of large-size display. OLED display technology is divided into two types according to different driving methods: passive drive OLED (PMOLED) and active drive OLED (AMOLED). Compared with PMOLED, AMOLED has more advantages: AMOLED uses a backplane with TFT (thin film transistor) graphics as a display substrate, so it can obtain a larger display capacity, better display quality, and longer life, thus realizing OLED TV display. In terms of energy saving, AMOLED has shown an extraordinary advantage. The power consumption of a 29-inch CRT TV is about 100 watts, the power consumption of a 40-inch TFT-LCD TV is about 200 watts, and the power consumption of a 50-inch PDP is more than 500 watts. A 40-inch large-size AMOLED TV will consume less than 100 watts, and because it is self-luminous, the actual power consumption will be even lower. Therefore, AMOLED is considered to be one of the most promising next-generation flat panel display technologies. Countries are accelerating their patent layout Market research organization Displaysearch predicts that the output value of OLED displays will reach US$827 million this year and US$3.1 billion in 2012. Now, the OLED industry has formed a certain scale, and the next 5 to 10 years will be a critical period for development. Although OLED technology originated in Europe and the United States, due to the relationship between cost and industrial chain, the countries and regions that finally achieved large-scale industrialization are concentrated in East Asia, mainly Japan, South Korea, mainland China and Taiwan. The author predicts that after 2008, the OLED market will have a greater development and there will be new breakthroughs in technology. There will be a big growth in the small and medium-sized OLED in the market. In terms of application, mobile phone main screens, digital cameras, PMPs, portable DVDs, car displays, especially OLED TVs, will develop faster. In commercial applications, OLED has experienced a development process from PMOLED to AMOLED. PMOLED technology is relatively simple and matures earlier. Since the 1990s, OLED products have been mainly PMOLED. However, with the advancement of OLED technology, AMOLED has developed rapidly and is ready to go. Now, many large flat panel display companies in the world are optimistic about the future of AMOLED and have invested a lot of money in R&D and industrialization. The large number of AMOLED products launched by Sony, Samsung SDI, Qijing Optoelectronics and other companies have further promoted the development of AMOLED industry and technology. Although AMOLED still needs to be greatly improved in production process and yield, these problems will be continuously improved and solved over time. The cost will also be further reduced, and the ability to compete with LCD will be gradually enhanced. In 2008, Japan and South Korea, two major display powers, competed to deploy large-size AMOLED. Sony, Toshiba and other 11 companies jointly tackled the key technologies of the next generation of large-size OLED panels in order to catch up with South Korea. The Japanese government will invest 223.6 billion yen in scientific research funds in the next three years. South Korea's Samsung also plans to increase investment by 529 million US dollars to invest in the research and development of large-size AMOLED displays. While developing OLED technology, companies and research institutions around the world have accelerated their patent layout. According to the data from the patent offices of China, the United States, Europe and Japan, as of July 2007, there were about 16,000 patents related to OLED technology published, of which Japan accounted for about 63%, South Korea accounted for about 12.8%, the United States accounted for about 12.2%, China accounted for about 7.7%, and Germany accounted for about 2%. South Korea and China have strong growth potential. After 2003, the number of patent applications has increased significantly.

songrisi

A sharp rise. How China can seize the opportunity Chinese governments at all levels have attached increasing importance to the research on the industrialization of a number of major high-tech technologies, including new flat panel displays including OLED, and have taken some powerful measures to encourage enterprises to develop research and development, such as increasing government procurement support for independent innovation products. In mainland China, there are dozens of scientific research institutions and enterprises engaged in the research and development and industrialization of OLED. The gap between China's OLED basic technology and that of foreign countries is not large. Researchers have done a lot of work in mechanism research, material development, device structure design, production process technology, etc., and have achieved a series of valuable research results and obtained a large number of patent technologies. The common problem in China's display industry is that the concept of innovation is backward, and enterprises lack confidence and patience in the research of technologies with great long-term value and possible risks. The emergence of OLED technology has provided a relatively historical opportunity for my country to develop independent flat panel display technology. We have also reached the advanced level of foreign countries in the development of PMOLED technology. Facing new opportunities in the display industry, we should make preparations in the following aspects: First, actively develop AMOLED on the basis of developing PMOLED. PMOLED is the foundation. China is not far behind foreign countries. The development of PMOLED technology and industry will lay a good foundation for the development of AMOLED. AMOLED is the future direction of OLED development. Mainland China is still far behind Japan, South Korea and Taiwan in AMOLED research and development. If China cannot speed up development, it will repeat the mistakes of relying on full import in the past CRT and LCD era. Secondly, speed up the pace of industrialization. The development of OLED in mainland China is in the introduction period of industrialization and the growth period of technology. It has started later than foreign countries, so it is particularly important to speed up the pace of OLED industrialization. To speed up the pace of industrialization, we need to pay attention to the following two aspects: 1. Do a good job in equipment research and raw material development and other industrial chain supporting work. Mainland China has a weak industrial foundation and an imperfect industrial chain. Key materials, equipment, components, etc. need to be imported from abroad, which leads to a reduction in product cost advantages. 2. The government should increase its centralized support for OLED and promote the development of independent and innovative flat panel display technology. In terms of technology alliance, most enterprises in mainland China have limited R&D capabilities and it is difficult to carry out projects that require several years of large capital investment. The development of the AMOLED industry requires enterprises with technological advantages in OLED and TFT to form an alliance, which first requires government guidance and support. 3. In terms of the industrial chain, the government needs to formulate a guiding key technology plan to speed up the construction of industrial supporting facilities. 4. In terms of the construction of the OLED technology R&D environment, it is necessary to create a public R&D platform for common technologies related to OLED. 5. In terms of intellectual property rights, it is necessary to strengthen the layout of the OLED field and form a complete intellectual property system.

maningmei

OLED (Organic Light Emitting Display) refers to the technology of organic materials emitting light under the action of an electric field. LED is also an electro-optical conversion device, but it uses inorganic materials. It can be seen that OLED and LED are both different and related.