source:Other information release time:2024-01-06 Hits: Popular:PCB Assembly company
The most critical thing about flexible screen technology is how to ensure the stability of the device. "The stability is mainly related to the amount of water and oxygen that penetrate into the device from the outside during use. The amount of water and oxygen penetration first depends on the airtightness of the flexible substrate itself; in order to improve the flexibility of the device, the thinner the substrate, the better Good. But if the substrate becomes thinner, its airtightness cannot be guaranteed. This is a contradiction, and the airtightness of plastic is not as good as that of glass." Zou Dechun said, this requires finding the best flexibility and airtightness of the substrate. The coordination point is to prevent water and oxygen from penetrating into the device while ensuring the flexibility of the device.
Regarding the controversial issue on the Internet, "Is the flexible OLED screen that is not afraid of falling afraid of too high or too low temperature?" Zou Dechun said: "Flexible OLED does have the advantages of not being afraid of falling and being able to bend. These advantages all come from its plastic substrate. Flexibility. However, the flexibility of plastic films is closely related to the ambient temperature. Environments with too high temperatures, such as above 100°C, and too low temperatures, such as below minus 10°C, are not suitable for the use of flexible OLEDs. In short, it is still necessary to coordinate flexibility and Relationship between package airtightness.”
Liang Xiao believes that if the "flexible film" is made well, then the flexible OLED as a screen will be more secure in resisting excessively high or low temperatures. And with the development of technology in the future, these problems will definitely be solved.
According to data, the polyethylene terephthalate film "Teonex" produced by Teijin DuPont Film Company, a joint venture between Japan and the United States, has been used as a circuit in the 7.4-inch flexible OLED display developed by the U.S. Flexible Display Center Substrate material, which shows that after solving the contradiction between flexibility and air tightness, the application of flexible screens is constantly increasing.Solar Energy System
What is the current situation in China in terms of R&D and production of flexible OLED panels?
Zhou Wang, deputy manager of the North China Marketing Department of Beijing Visionox Technology Co., Ltd., said that currently there are only a handful of domestic R&D and production companies for flexible OLED materials, and few have actually entered mass production into industrialization, let alone the application of flexible OLED. In 2013, the global OLED TV market will reach US$1.4 billion, and by 2015, OLED display revenue will reach US$6 billion.
"Flexible OLED can be said to be the most ideal flat-panel display technology, but its materials and preparation processes are much more difficult than ordinary flat-panel OLED. There is still a big gap between China and Japan and South Korea in these two aspects." Zou Dechun said, In terms of ITO/PET substrates with excellent transparency, conductivity and flatness, they mainly rely on Japan. In addition, Japan and South Korea also have more advanced processes in terms of preparation technology, especially packaging technology.
"Today we are still working hard to mature glass substrate OLEDs, while foreign countries have begun to regard flexible material screens as the main development direction in the future. In the field of mobile phone screen display, we have tried very few so far and lack a sense of innovation. If there is One day when flexible screens become the main carrier of electronic displays, we may fall behind others." Liang Xiao believes, "If we want to keep up with this trend, we have to catch up now."
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