Visionox’s principle researcher Li Lin gave a keynote speech with a theme “Development of Foldable AMOLED Display” at the 3rd OLED Korea Conference held for two days from March 8 to 9 by UBI Research.

Principle researcher Li Lin explained the development trend of flexible display, saying “Initial CRT was originally developed as an oscilloscope, but due to the development of full-color technology, it has been used commonly in our lives. LCD was also developed as a segment display, but due to the development of semiconductor technology, TFT black plane was applied to LCD so that LCD could be able to be used for smartphone and large-screen TV as well. The combination of the latest electronic technology and material technology enables display innovation, and the most innovative technology of OLED different from existing displays is a flexible display, Visionox is intensively developing now”.

In addition, he introduced the development history of Visionox’s flexible display, unveiled touch sensor 7-inch foldable AMOLED display that was developed in November 2016, and announced this module featuring 180° out-folding passed a folding test.

<Flexible AMOLED display with the touch-sensor featuring 180° out-folding, Source: Visionox.com>

He added that in order to develop foldable display, it is very essential to improve reliability of TFT, use durable materials such as strong OCA, scratch-resistant and durable cover window film, thinner circular polarizer layer, and panel-combined touch panel, and decrease module thickness.

Meanwhile, principle researcher Li Lin said “The mass production of Flexible OLED panel finally depends on the yield improvement. But, skills and experience for mass production are still insufficient.” Regarding the question about the development of circular polarizer layer, he answered “Reducing thickness is a key. And, we are considering the way to combine with another layer.” Lastly, regarding the development of Touch panel, “Among various technologies, especially on-cell technology is now under examination”, and regarding materials, “Metal mesh seems to be a good alternative, but there is no specific plan yet” he announced.