Ion transport in SSFLCD's

Maximus, Bart; Ley, Erwin De; Meyere, Arnout De; Pauwels, Herman

doi:10.1080/00150199108217614

Cited by 61 publications

(37 citation statements)

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“…For smectic liquid crystals, the description of the dynamic behavior is usually based on a onedimensional description [7,8,10,13]. However, the real behavior is more complicated, because switching is often inhomogeneous, through domain wall motion.…”

Section: Lc Device Definitionmentioning

confidence: 99%

“…The electric field in the LC-layer can be written as a function of the charges using Gauss law [8,10]:…”

Section: Lc Device Definitionmentioning

confidence: 99%

“…The importance of ions in smectic materials has been recognized early on [7][8][9] and there are many reports in the literature about experimental work and theoretical simulations of ion transport [7][8][9][10][11]. In smectic materials the electric field generated by the ions can play an important role in the switching and the bistability of smectic devices.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ion Transport and Switching Currents in Smectic Liquid Crystal Devices

Neyts

Beunis

2006

GFER

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In SSFLC and AFLC devices, the voltage over the liquid crystal is not only determined by the applied voltage, but also by the separation of ions and the spontaneous polarization. The motion of ions and the switching of the spontaneous polarization are therefore interfering phenomena. A simplified model for ion transport and switching of polarization is introduced which is able to explain the shift in apparent threshold voltage and the variation of the hysteresis width.

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Section: Lc Device Definitionmentioning

confidence: 99%

“…The electric field in the LC-layer can be written as a function of the charges using Gauss law [8,10]:…”

Section: Lc Device Definitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ion Transport and Switching Currents in Smectic Liquid Crystal Devices

Neyts

Beunis

2006

GFER

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“…It should also be noted that previous experimental results have shown that ion transport in flcs is such that only one charge carrier is mobile, supporting the ability of flcs to possess a spatially modulated charge density. 36 The diffision of the more mobile species is maximized at this orientation, with ions moving approximately parallel to the long In the plesent flc composite, the photorefractive electro-optic mechanism is derived from orientational effects and not the linear electrooptic effect. First, the majority of flcs have a small degree of electronic second-order nonlinear character, as measured by small electro-optic coefficients (~j) that are 1-2 orders of magnitude lower than their crystalline counterparts.…”

Section: Resultsmentioning

confidence: 99%

<title>Photorefractivity in ferroelectric liquid crystals</title>

Wiederrecht

Wasielewski²,

Fuller³

2000

SPIE Proceedings

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The first observation of photorefiactivity in ferroelectric liquid crystals (flcs) is reported. The flcs are doped with the easily oxidized chromophore perylene, which also functions as the sensitizer.The electron acceptor di-butylpyromellitirnide is added to induce photoconductivity through an efficient intermolecular electron transfer reaction to produce mobile ions. A strong dependence on the orientation of the wavevector of the optical intefierence pattern and polarization of the writing beams relative to the orientation of the flc molecules is observed. The results are interpreted as an orientational photorefiactive effect in which the net polarization of the flc couples linearly to the space-charge field as opposed to nematic liquid crystals in which the dielectric anisotropy couples to the square of the space charge field.

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“…The ion transport in the FLC has been widely explored because it was supposed be an alternative to breaking the bistability of this material. The model developed by Maximus et al [25] is a set of time and space differential equations, which is to be avoided. We use a behavioural model based on observations instead.…”

Section: Ion Transportmentioning

confidence: 99%

Analogue-driven bistable ferroelectric liquid crystals

Madec

Uhring

Hervé

2008

Analog Integr Circ Sig Process

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This paper presents a new driving method allowing fast analogue light modulation with bistable ferroelectric liquid crystals (FLC). The method is evaluated using a functional virtual prototyping design flow. First, a surface stabilized binary FLC cell is modeled in VHDL-AMS language on the basis of well-known theories of FLC. Some physical and environmental phenomena are added (e.g. electronic behavior of the cell, temperature, etc.) in order to improve its reliability. Once the model is validated, a virtual prototype of a FLC pixel is performed by associating the model of the FLC cell and the model of an appropriate wave generator. Simulations show that our new driving method works, but with certain limitations. The most critical one seems to be the high temperature dependence of the pixel response.

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Ion transport in SSFLCD's

Cited by 61 publications

References 0 publications

Ion Transport and Switching Currents in Smectic Liquid Crystal Devices

Ion Transport and Switching Currents in Smectic Liquid Crystal Devices

<title>Photorefractivity in ferroelectric liquid crystals</title>

Analogue-driven bistable ferroelectric liquid crystals

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