China should vigorously develop the O/PLED industry

Academician of Academy of Sciences, China Material Institute of South China University of Technology professor Cao Yong in the 2007 China flat panel display a report entitled "problem and Prospect of" O/PLED flat panel display technology development and industrialization of the industry technology summit report.

Cao Yong said that in 1987, Kodak announced the use of evaporation method to produce OLED technology, PLED began in the United Kingdom in 1990, the results of the study of the University of Cambridge. Compared with LCD, O/PLED has many advantages, such as low power consumption, fast response, wide viewing angle, simple production process and so on. At the same time, because of the changeable structure of organic materials, the color can be adjusted in a large range.

After 20 years of development, O/PLED technology research and development has made remarkable progress. In the last century at the beginning of 90s, Japan for the O/PLED company intends to use it as a notebook computer display, but then LCD application on the display has been very mature, the O/PLED is completely as the next generation of flat panel display technology and research. In the past 20 years, O/PLED devices have made great progress both in efficiency and life. From the data provided by Kodak, OLED red light and blue light efficiency has achieved more than a dozen lumens / watt, half of the white light has reached more than 50 thousand hours. According to the data provided by CDT, the half-life of PLED is also more than tens of thousands of hours, just a little blue, but also close to 10 thousand hours. DuPont Co recently released a solution processing small molecule OLED technology, and is ready to use this technology to produce 4 inches to 6 inches portable DVD display, which is a major breakthrough in the production process of OLED technology. In addition, the passive drive appears to have some difficulties, CDT developed a called "TMA" the new driving scheme, the scheme uses passive driven technology to achieve similar to the active driving effect, CDT ready to launch the product at the end of the year, which will drive a new product for the passive role in promoting.

Cao Yong said, O/PLED industry has made great progress. Kodak introduced a spray heating, the utilization rate of organic raw materials will be increased from 5% to 90%. In PLED, it is not difficult to process large size substrate. In recent years, Litrex has launched the 4.5 generation line (730mm * 920mm) inkjet printing equipment, and they recently launched a 2.4m * 2.4m large inkjet printing equipment.

O/PLED shipments each year, a substantial increase, but by the price impact, the profit is not synchronized growth, while the industry also has several companies out of the ranks of the competition due to financial reasons. But in the past two years, the situation has improved significantly, following the announcement that Samsung will produce active OLED, Sumitomo chemical announced in July this year, will be $285 million to buy CDT, the price is equivalent to the highest price of CDT shares in history.

How should China develop O/PLED industry? Cao Yong believes that in the short term, should focus on supporting 1-2 as soon as possible have the foundation, determined the industrialization of enterprises, to achieve commercial production of O/PLED as soon as possible, the development of a competitive LCD product line, make it become the domestic production of O/PLED seeds. In the long run, the development of O/PLED industry to solve the problem of TFT. O/PLED is current driven, the current is larger, the need for low temperature polysilicon (LTPS) technology. In this regard, the leading international enterprises did not realize large-scale production, the new low-temperature polysilicon so we should support a variety of independent intellectual property rights of the technology, such as Hongkong, the Guo Haicheng group metal induced Yan Dong research application of chemical technology, LTPS Changchun Airlines Group organic TFT technology. On the whole, we should develop the material and technology to form the pixels in order to reduce the production cost and improve the market competitiveness. Domestic enterprises and research institutions should give full play to the advantages of the combination of research, under the support of the government to absorb private capital, to attract international talents, promote the rapid development of China's O/PLED industry.

Source: China Electronics News