63‐1: A Stack of Bendable Touch Sensor with Silver Nanowire for Flexible AMOLED Display Panel

Liu, Zhen; Mao, Xurui; Wang, Ming-HSI; Gu, Xin; Shi, Shiming; Zhou, Weifeng; Yuan, Guangcai; Wang, Dawei

doi:10.1002/sdtp.11788

Cited by 9 publications

(6 citation statements)

References 3 publications

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“…Different from the modulus optimization, according to Equation (4), when the film thickness is adjusted, it will lead to the change of down When i = 4, the value of 4 h needs to be reduced. Numerical Simulation: The theory of mechanical analysis provides a direction for panel structure optimization, but quantificationally adjusting the value of 4  requires numerical simulation. Meanwhile, the reliability of the theoretical analysis needs to be verified by the numerical simulation results.…”

Section: )mentioning

confidence: 99%

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P‐10.3: Structural Optimization Method of Foldable AMOLED Panel Based on Mechanical Theory

Shi

Chen

et al. 2021

Symp Digest of Tech Papers

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The multi‐neutral plane phenomenon of foldable panel can obviously reduce the strain of the AMOLED (active‐matrix organic light‐emitting diode) panel after being bent, but it also complicates the optimization of the panel structure. Considering the force balance at the axis of symmetry after the panel was folded, this paper established the basic theory of AMOLED panel structure optimization, which indicated the direction of structure optimization of the panel. Then the theory was validated by numerical simulation. It can be used to guide the structural design of the foldable panel.

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Section: )mentioning

confidence: 99%

“…At present, a great number of research reports are still focused on improving the flexural properties of the components such as Thin Polarizer [2], Touch Pad [3][4], and Light-emitting Diode [5]. In addition, the bending stress of these components is simulated and analyzed [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

P‐10.3: Structural Optimization Method of Foldable AMOLED Panel Based on Mechanical Theory

Shi

Chen

et al. 2021

Symp Digest of Tech Papers

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“…The neutral plane must be balanced to minimize strain in critical layers of the device. Thin film transistors (TFTs), thin flexible encapsulation (TFE), and touch sensors are predicted to be most vulnerable, although newer silver nanowire and metal mesh sensors are more flexible than ITO [22,23]. Although manufacturers continue to improve the durability of OLED displays, publicly available literature indicates that critical components are still quite sensitive to strain.…”

Section: Bonding Requirements In Bent or Curved Displaysmentioning

confidence: 99%

Optically Clear Adhesives for OLED

Abrahamson¹,

Beagi²,

Salmon³

et al. 2020

Luminescence - OLED Technology and Applications

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Optically clear adhesives (OCA) have been used for more than a decade to bond rigid LCD and AMOLED displays for consumer electronics applications, offering optical, mechanical, and electrical performance benefits. The performance requirements of an OCA to bond cover window, touch sensors, and circular polarizers in a plastic OLED display to bent cover glass or a flexible, foldable OLED display are drastically different from a flat, rigid device. For plastic OLED to bent cover glass bonding, the adhesive needs to be strong enough to resist spring back of the flat, plastic OLED devices. For flexible, foldable OLED displays, the neutral plane needs to be managed during folding keeping strain to a minimum in critical layers of the device (e.g., touch sensor, TFT, TFE), and the OCA cannot deform (or cause other layers to deform) during the folding process. Folding also brings challenges to touch sensors that can no longer use conventional passivation layers. As a result, the OCA will be responsible for preventing corrosion of touch sensor materials such as metal mesh, silver nanowire, carbon nanotube, and graphene. The chapter will discuss OCA performance requirements for rigid, flexible, and foldable OLED bonding.

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“…During the bending of the panel, the deformations of adjacent layers are usually not coordinated, and such phenomenon may lead to diverse types of failure. In the literature, many works focused on studying the flexibility of single‐layer component, such as polarizer (POL), 13 trackpad, 14–16 and OLED device 17 . However, the layers in a flexible OLED panel are bonded together in the form of a module stack during the bending process.…”

Section: Introductionmentioning

confidence: 99%

Mechanical simulation of foldable organic light‐emitting diode display supporting layer

Wang¹,

Jia²,

Li³

et al. 2021

J Soc Info Display

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The bending reliability is the key characteristic of foldable organic light‐emitting diode (OLED) panel. In the bending process of foldable OLED panel module, display supporting layer crack and optically clear adhesive (OCA) layer peeling issue often occur. In this study, a periodic pattern supporting layer is designed to solve the peeling and crack issue. The finite element method for simulating the foldable panel was constructed to investigate the correlation between the dimensions of the periodic pattern substructure and the crack stress. The results show that the periodic pattern substructure can decrease the modulus of the bending zone, which can significantly improve the flexibility of the supporting layer. It makes the deformations of OCA to be coordinated during the bending process, thus effectively reducing the peeling issue. In addition, the crack stress values of the periodic pattern substructure directly rely on its dimensions. It indicates that a proper design of the pattern substructure and feature dimensions is important to improve the bending reliability of the OLED panel.

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63‐1: A Stack of Bendable Touch Sensor with Silver Nanowire for Flexible AMOLED Display Panel

Cited by 9 publications

References 3 publications

P‐10.3: Structural Optimization Method of Foldable AMOLED Panel Based on Mechanical Theory

P‐10.3: Structural Optimization Method of Foldable AMOLED Panel Based on Mechanical Theory

Optically Clear Adhesives for OLED

Mechanical simulation of foldable organic light‐emitting diode display supporting layer

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