Flexible Grayscale Ferroelectric Liquid Crystal Device Containing Polymer Walls and Networks

Sato, Hiroto; Fujikake, Hideo; Iino, Yoshiki; Kawakita, Masahiro; Kikuchi, Hiroshi

doi:10.1143/jjap.41.5302

Cited by 101 publications

(57 citation statements)

References 2 publications

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“…Finally, we formed polymer walls and fibers by a two-step exposure to UV light [9], which causes photopolymerization-induced phase separation. In this process, we first heat the solution to a temperature where the solution exhibits nematic phase, and then illuminate local regions with the first UV exposure through a photomask.…”

Section: Fabrication Processmentioning

confidence: 99%

“…In the device, molecularly aligned polymer fibers cause the FLC molecules to become monostable in the rubbing direction, leading to the device capable of grayscale modulation [7]. The polymer walls [8,9] are also aligned in the rubbing direction, and hence, it can exhibit a high-contrast display operation [10]. If reflec-tive devices using these FLC/polymer composite films are realized, we can create low-power-consumption flexible displays suitable for high-quality moving images in bright places.…”

Section: Introductionmentioning

confidence: 99%

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A process for fabricating flexible reflective display devices using a composite film of ferroelectric liquid crystal and polymer

Sato¹,

Fujikake²,

Murashige³

et al. 2007

Electron Comm Jpn Pt II

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SUMMARYWe have developed a process for fabricating flexible reflective display devices using thin composite films of aligned polymer-monostabilized ferroelectric liquid crystals encased between plastic substrates. In order to precisely control the thickness of these films, photolithography is used to fabricate spacer posts on a substrate, and a printing technique that can form a liquid crystal/monomer solution film on the substrate uniformly. Control voltages are applied to the layer via transparent electrodes; in order to prevent a short circuit between these electrodes, an insulator layer is also formed on the other substrate. Once the two substrates are attached to one another, polymer walls and fibers are created in the liquid crystal layer between the two substrates by photopolymerization-induced phase separation which was induced by two-step exposure of ultraviolet light. A fabricated device is sandwiched between a polarizer and a diffuse mirror to make a reflective display. Uniform display operation was obtained when the device was driven with a voltage, even when the device was bent with a 5-cm radius of curvature.

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Section: Fabrication Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A process for fabricating flexible reflective display devices using a composite film of ferroelectric liquid crystal and polymer

Sato¹,

Fujikake²,

Murashige³

et al. 2007

Electron Comm Jpn Pt II

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“…We have recently formed lattice-shaped polymer walls [12] with polymer fibers to increase the mechanical tolerance in order to give excellent bending tolerance, as shown in Fig. 10.…”

Section: Enhancement Of Substrate Spacingmentioning

confidence: 99%

Polymer-stabilized ferroelectric liquid crystal for flexible displays

Fujikake¹,

Sato²,

Murashige

2004

Displays

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“…Reflective liquid crystal displays (LCDs) [1][2][3] and electrophorectic displays (EPD) [4] have been studied for mobile devices, outdoor poster displays, and e-books. Although the technologies of conventional displays, based on LCDs and organic light emitting diodes (OLEDs), are promising for flexible display applications, they require expensive, complex manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Flexible Reflective Color Displays using Thermochromic Pigments

Heo

Sohn

et al. 2013

Journal of the Optical Society of Korea

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This research presents a flexible reflective thermochromic display (TCD) comprised of thermochromic pigments and a patterned indium tin oxide (ITO) film coated on a polyethylene naphthalate (PEN) substrate, and the display's thermo-optical characteristics. The display showed maximum red, green, and blue reflectances of 30%, 38%, and 29%, respectively. Furthermore, the display exhibited a continuous grey color when the temperature was changed continuously. As a flexible display, the display showed reliable thermo-optical performance without image damage even when highly bent. We expect the proposed TCD will be used in outdoor information display applications where low cost is a key factor.

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Flexible Grayscale Ferroelectric Liquid Crystal Device Containing Polymer Walls and Networks

Cited by 101 publications

References 2 publications

A process for fabricating flexible reflective display devices using a composite film of ferroelectric liquid crystal and polymer

A process for fabricating flexible reflective display devices using a composite film of ferroelectric liquid crystal and polymer

Polymer-stabilized ferroelectric liquid crystal for flexible displays

Flexible Reflective Color Displays using Thermochromic Pigments

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