Technical Session

C22

Flexible Displays OLEDs

OLEDs Emphasize Flexibility:Aiming at Replacement Demand in Existing Markets while Pioneering New Ones

Datetime: 10/24  14:30 - 17:00

Floor: PACIFICO YOKOHAMA Conference Center

About lecture and lecturer

10.2 inch WUXGA Flexible AMOLED Display Driven by Oxide TFTs

Oxide TFT is a promising candidate for driving flexible OLEDs owing to its high mobility, low-temperature process, and excellent short-range uniformity of electrical properties. High reliability of TFT on plastic substrate is required for practical use of flexible displays. We have developed highly reliable oxide TFTs on plastic substrate, and a 10.2 inch WUXGA flexible OLED display with integrated gate driver circuits. We would like to talk about our developed flexible OLED display driven by oxide TFTs, and input function as new value of flexible display beyond thin & light.

Kentaro Miura

Kentaro Miura

Research Scientist, Electronic Imaging Laboratory, Corporate R&D Center

Toshiba Corporation

2002 Joined Toshiba Corporation

2002-present: R&D in the field of display devices

Research Scientist, Electronic Imaging Laboratory, Corporate R&D Center

Development of High-definition Flexible OLED Display

By applying our original transfer technology, we developed a 3.4-inch qHD flexible AMOLED display with a high resolution exceeding 300 ppi for the first time in the world. We also succeeded in fabricating a prototype of a 13.5-inch 4K2K flexible AMOLED display that conforms to a broadcasting standard for the next generation. In order to achieve such a remarkably high resolution, a white OLED combined with a color filter was used. For the white OLED, a tandem structure in which a phosphorescent emission unit and a fluorescent emission unit are stacked was employed. Furthermore, in order to increase power efficiency and lifetime of the white tandem OLED, revolutionary technologies, ExTET and TTA, were applied to the phosphorescent and fluorescent emission units, respectively.

Kohei Yokoyama

Kohei Yokoyama

Research and Development Division   Leader

Semiconductor Energy Laboratory Co., Ltd.

Kohei Yokoyama received his BS and MS degrees in Chemistry from Tokyo Metropolitan University, Japan, in 2001 and 2003, respectively. After graduation, he joined Semiconductor Energy Laboratory Co., Ltd. and has been engaged in R&D of OLED displays.

Harue Nakashima

Harue Nakashima

Research and Development Division   Leader

Semiconductor Energy Laboratory Co., Ltd.

Harue Nakashima joined Semiconductor Energy Laboratory Co., Ltd in 2001. Since then, she has been engaged in R&D of OLED mainly the development of the material.

Toward the realization of fully-printed flexible OLED displays

In this presentation, current and future technology trends in flexible organic EL (OLED) displays will be discussed. In the first half of the presentation, the latest flexible display technology trends will be reviewed, and the constituent technologies including flexible substrates, TFT backplanes and OLED frontplanes will be examined. Next, recent progress made within our lab in the research and development of flexible OLED display technology using organic TFT devices will be reported. In the second half of the presentation, details of research work aimed at producing fully-printed flexible displays in the future will be described, including OLED pixel formation and fine pattering of the semiconductor and metal electrode layers performed with ink-jet or other printing methods. Lastly, the basic performance characteristics of prototype organic TFT backplanes prepared with solution methods will be presented.

Shizuo Tokito

Shizuo Tokito

Research Center for Organic Electronics, Yamagata University · Vice Director, Professor

Yamagata University

Shizuo Tokito received his D.Eng. and M.A. in Material Science from Graduate School of Engineering Sciences, Kyushu University, and became a Research Associate of Kyushu University. He also worked as a postdoctoral researcher under Prof. Alan J. Heeger, Noble Prize laureate in chemistry, at UC Santa Barbara (US). He then joined Toyota Central R&D Labs Inc. as Senior Research Engineer and later the Japan Broadcasting Corporation (NHK) as a Research Director. He is currently Vice Director and Distinguished Research Professor at the Research Center for Organic Electronics (ROEL) within Yamagata University.

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