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Repeatedly foldable AMOLED display
Author(s) -
Komatsu Ryu,
Nakazato Ryo,
Sasaki Takeru,
Suzuki Akio,
Senda Naoyuki,
Kawata Takuya,
Jimbo Yasuhiro,
Aoyama Tomoya,
Ohno Naoto,
Kawashima Susumu,
Ikeda Hisao,
Eguchi Shingo,
Hirakata Yoshiharu,
Yamazaki Shunpei,
Shiraishi Takashi,
Yasumoto Seiji,
Nakada Masataka,
Sato Masataka,
Bower Chris,
Cotton Darryl,
Matthews Andrew,
Andrew Piers,
Gheorghiu Catalin,
Bergquist Johan
Publication year - 2015
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.276
Subject(s) - oled , amoled , passivation , materials science , optoelectronics , diode , layer (electronics) , optics , active matrix , composite material , thin film transistor , physics
Abstract In this study, a 5.9‐inch foldable active‐matrix organic light emitting diode (AMOLED) display was developed. A folding test was performed repeatedly. The display survived the folding test (100,000 folds) with a curvature radius of 2 mm. To protect an organic light emitting diode (OLED) against moisture, inorganic passivation layers are provided on the upper and lower sides of the flexible display. Using our transfer technology, high density passivation layers can be obtained. The measured water vapor transmission rate of the layer is 7 × 10 −6 g/m 2 ⋅day or less, which improves OLED reliability. With these techniques, we have developed a book‐type display, which is repeatedly foldable like a book, and a tri‐fold display including a display area, which is foldable in three.