25.2: Repeatedly Foldable Book‐Type AMOLED Display

Komatsu, Ryu; Nakazato, Ryo; Sasaki, Tatsuo; Suzuki, Akio; Senda, Naoyuki; Kawata, Takuya; Ikeda, Hisao; Eguchi, S.; Hirakata, Yoichi; Yamazaki, Shunpei; Shiraishi, Takashi; Yasumoto, Seiji; Bower, Chris; Cotton, Darryl; Matthews, Andrew; Andrew, Piers; Gheorghiu, Catalin; Bergquist, Johan

doi:10.1002/j.2168-0159.2014.tb00088.x

Cited by 60 publications

(49 citation statements)

References 14 publications

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“…Large displays are preferred for mobile devices; however, small displays are more portable. Foldable displays, which are size‐adjustable, offer a promising solution to the portability–practicality trade‐off . Various displaying modes, such as electronic paper, liquid crystal, and organic light‐emitting diodes (OLEDs), have been proposed for foldable displays .…”

Section: Introductionmentioning

confidence: 99%

“…Foldable displays, which are size-adjustable, offer a promising solution to the portability-practicality trade-off. 1,2 Various displaying modes, such as electronic paper, liquid crystal, and organic light-emitting diodes (OLEDs), have been proposed for foldable displays. [3][4][5] The mobile device displays must also satisfy other specifications such as highresolution, low-power consumption, light weight, thinness, durability, and flexible design.…”

Section: Introductionmentioning

confidence: 99%

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A 5.5‐inch full HD foldable AMOLED display based on neutral‐plane splitting concept

et al. 2019

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Splitting of the mechanical neutral plane is a promising concept for foldable displays because it reduces the folding stress in each layer of the display. We verified the splitting concept experimentally and revealed a linear relation between the relative position of the neutral plane and the logarithm of the adhesive's elastic modulus. As the modulus decreased, the position of the neutral plane approached that of perfect splitting. On the basis of the neutral‐plane splitting concept, we developed 5.5‐inch full high‐definition foldable active matrix organic light‐emitting diode (AMOLED) displays, which endured 150 k inward folding cycles and 150 k outward folding cycles with folding radii of 3 and 5 mm, respectively. This study is expected to improve the flexibility of designing foldable AMOLED displays, enabling better balance of the portability versus practicality trade‐off in mobile displays.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A 5.5‐inch full HD foldable AMOLED display based on neutral‐plane splitting concept

et al. 2019

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“…Commercial barrier vendors typically provide multilayer organic-inorganic structures that fail when flexing, or cannot be bent to tight bending radii (below 10 mm). Silicon nitride-based barrier films have been used with success, allowing a display demonstrator with sufficiently wide bezel seal area to be bent over 100 000 repeats to a bending radius of 2 mm without failure 7 . Some of these films are difficult to implement on native polymer substrates, and investigations to create molecularly impermeable thin film barriers have been carried out with varying results [8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

10.2: High‐Performance Barrier Films for Flexible Organic Display and Lighting Applications

Kimmel

Nikkola

Räsänen

et al. 2015

Symp Digest of Tech Papers

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The key requirement in manufacturing flexible organic lightemitting displays (OLEDs) is to protect the deposited electrodes and emitter materials from oxygen and moisture permeation. Multilayered organic/inorganic barrier films can get relatively thick and brittle, and thinner, intrinsically flexible barrier films need to be developed. In this study, we have investigated manufacturing multilayered sol-gel/atomic layer deposition (ALD) structures on poly(ethylene naphthalate) films. The results show improved surface morphology and promising shielding properties against water vapor and oxygen permeation.

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“…We have previously fabricated flexible OLED displays using a combination of white OLEDs and color filters . We also have developed a foldable OLED display folded in three like a folding screen and a display folded in two like a book . By providing the foldable OLED display with a touch sensor, we develop an emerging value‐added touch panel with a wide application range.…”

Section: Introductionmentioning

confidence: 99%

A foldable OLED display with an in-cell touch sensor having embedded metal-mesh electrodes

Watanabe

Iwaki

Uchida

et al. 2016

Jnl Soc Info Display

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A foldable organic light‐emitting diode display integrating a touch sensor is fabricated. The touch sensor has an in‐cell structure where metal‐mesh sensor electrodes are formed in a counter substrate. It is demonstrated that touch on the entire panel surface, including a bent portion, is detected and that the touch panel operates correctly after 100,000 folding operations with a radius of curvature of 5 mm.

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25.2: Repeatedly Foldable Book‐Type AMOLED Display

Abstract: In this study, a 5.9-inch foldable Book-Type 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.

Cited by 60 publications

References 14 publications

A 5.5‐inch full HD foldable AMOLED display based on neutral‐plane splitting concept

A 5.5‐inch full HD foldable AMOLED display based on neutral‐plane splitting concept

10.2: High‐Performance Barrier Films for Flexible Organic Display and Lighting Applications

A foldable OLED display with an in-cell touch sensor having embedded metal-mesh electrodes

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