Date

Place

Room F (Room 320)
33. Transparent/Flexible Display Systems
August 20, 2015 (Thursday)
11:00 ~ 12:30

[33-3]
11:50 ~ 12:15
Title:[Invited] Large Area Flexible OLED Display and Technical Challenges
Weonseo Park, Mireum Lee, Mi Ae Kim, Youn-yeol Yu, Saemleenuri Lee, Dong Yoon Kim, Nu Ri Cheong, Sungjoon Min, Jaekyung Choi, Jungsik Jo, Choongkeun Yoo, SeungMin Lee, Chan Il Park, Minggu Cho, Kwonhyung Lee, Seyeoul Kwon, JongUk Bae, Jonggeun Yoon, Kwon-Shik Park, Sooyoung Yoon, and Inbyeong Kang (LG Display Co., Ltd., Korea)
Abstract: Large area flexible OLED display provides various electronic applications such as curved, rollable, and commertial displayes because of it��s thin and light properties and design freedom. In this work, the world 1st 18-inch flexible OLED display of bottom emission type is introduced. The panel fabrication process will be explained with some key technologies. To realize bottom emission structure, a transparent plastic substrate with thermally stable property was developed. With considering compatibility with TFT processes on a transparent substrate, we employed amorphous indium gallium zinc oxide (a-IGZO) TFTs. The electrical characterics of TFTs on transparent substrates show excellent transfer characteristics, even after detaching carrier glass; called LASER release process. After a fabrication of coplanar type TFT, the R,G,B,W pixels were defined on TFTs and then the flexible encapsulation process was employed on OLED layer to passivate it. After scribing each cell, COF/FPC bonding process was done. LASER release and back film lamination process were performed. In this work, some challenging technologies will be discussed in detail.
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