Polymer-stabilized ferroelectric liquid crystal for flexible displays

Fujikake, Hideo; Sato, Hiroto; Murashige, Takashi

doi:10.1016/j.displa.2004.04.001

Cited by 60 publications

(25 citation statements)

References 11 publications

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“…The Freedericksz transition was affected profoundly by the dispersed polymer network [6]. Aligned polymer fibers of sub-mm-diameter stabilize the liquid crystal alignement and create high speed grayscale capability [1]. The polymer fibrils present a large internal boundary and to provide a bulk anchoring mechanism which allows a control of the liquid crystal alignment in the bulk.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Polymer Network Density Formed in Short Pitch Ferroelectric Liquid Crystal on the Electroclinic Effect

Petit

Daoudi

Ismaïli³

et al. 2008

Molecular Crystals and Liquid Crystals

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The influence of the polymer network density formed in short pitch ferroelectric liquid crystal on the electroclinic effect has been analyzed. The polymer network is formed from a photo-reactive achiral monomer in a thin planar S Ã c cell. Using an electro-optic response technique, the electric field dependance of the induced tilt angle and the polarization near to the S A À S Ã c transition has been measured for different polymer concentrations. The results show that at phase transition temperature the electroclinic effect and the electroclinic susceptibility are largely controlled by the polymer network. These results are discussed and applied to a simple phenomenological model developed in [20]. This model confirms our observations for all of the polymer concentration studied. The average distance between two fibers and the interaction energy between the liquid crystal molecules and the polymer network are estimated. Good correlation is found between the experimental results and the proposed model.

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Section: Introductionmentioning

confidence: 99%

“…The development of the flexible liquid-crystal displays using polymer stabilized ferroelectric liquid crystals (PSFLC) is currently of high interest [1]. Polymer-stabilized liquid crystals are composite materials in which a low density of the polymer network is dispersed within liquid crystal media [2,3].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Polymer Network Density Formed in Short Pitch Ferroelectric Liquid Crystal on the Electroclinic Effect

Petit

Daoudi

Ismaïli³

et al. 2008

Molecular Crystals and Liquid Crystals

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“…With proper polymers and under suitable polymerization conditions, the polymer network formed can stabilize various optical states of the FLC to achieve either a thresholdless V-shape switching mode, which can be used for creating analog grey scale, or a bistable switching mode for passive addressing devices [8][9][10][11]. PNSFLCs also draw much attention as candidates for flexible displays that can be applied to smart cards or e-paper with very low power consumption [12][13][14]. The electrooptic behavior of the FLC can be modified by the formation of the polymer network [15,16].…”

Section: Introductionmentioning

confidence: 99%

Electrooptical Properties of Diacrylate Based Polymer Network Stabilized Ferroelectric Liquid Crystals

Zheng

2007

Molecular Crystals and Liquid Crystals

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Polymer network stabilized ferroelectric liquid crystals were produced by mixing a ferroelectric liquid crystal with a small amount of photo-cross-linkable diacrylate monomer and in situ polymerization of the monomer in homogeneously aligned ferroelectric liquid crystal environment. The addition of the diacrylate monomer into the ferroelectric liquid crystal causes dramatic reduction in spontaneous polarization and decrease in response speed. The formation of diacrylate polymer network in the ferroelectric liquid crystal can improve the response speed. The V-shape switching can be achieved by properly increasing the amount of polymer network.

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“…Bistable liquid crystal (LC) devices have been extensively investigated and used for display applications because of their unique electrooptic properties, mainly the ability to maintain an image indefinitely without power consumption [1][2][3][4][5][6][7][8][9]. Many ways have been developed to produce bistable LC devices over the past years [10].…”

Section: Introductionmentioning

confidence: 99%

Flexible Bistable Smectic-A Liquid Crystal Device Using Photolithography and Photoinduced Phase Separation

Yang

Guo

Wang

et al. 2012

Advances in Condensed Matter Physics

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A flexible bistable smectic-A liquid crystal (SmA LC) device using pixel-isolated mode was demonstrated, in which SmA LC molecules were isolated in pixels by vertical polymer wall and horizontal polymer layer. The above microstructure was achieved by using ultraviolet (UV) photolithography and photoinduced phase separation. The polymer wall was fabricated by photolithography, and then the SmA LC was encapsulated in pixels between polymer wall through UV-induced phase separation, in which the polymer wall acts as supporting structure from mechanical pressure and maintains the cell gap from bending, and the polymer layer acts as adhesive for tight attachment of two substrates. The results demonstrated that all the intrinsic bistable properties of the SmA LC are preserved, and good electrooptical characteristics such as high contrast ratio and excellent stability of the bistable states were characterized. This kind of SmA bistable flexible display has high potential to be used as electronic paper, smart switchable reflective windows, and so forth.

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Polymer-stabilized ferroelectric liquid crystal for flexible displays

Cited by 60 publications

References 11 publications

Effect of the Polymer Network Density Formed in Short Pitch Ferroelectric Liquid Crystal on the Electroclinic Effect

Effect of the Polymer Network Density Formed in Short Pitch Ferroelectric Liquid Crystal on the Electroclinic Effect

Electrooptical Properties of Diacrylate Based Polymer Network Stabilized Ferroelectric Liquid Crystals

Flexible Bistable Smectic-A Liquid Crystal Device Using Photolithography and Photoinduced Phase Separation

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