Repeatedly foldable AMOLED display. Issue 2 (9th March 2015)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Journal of the Society for Information Display. Volume 23:Issue 2(2015:Feb.)
• Page Start: 41
• Page End: 49
• Publication Date: 2015-03-09
• Subjects: Information display systems -- Periodicals; 621.38154205
• DOI: 10.1002/jsid.276
• Languages: English
• ISSNs: 1071-0922

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>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/m²⋅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.</p> </abstract>