Shock-free ferroelectric liquid crystal displays with high optical contrast

Лапаник, В. И.; Безбородов, В. С.; Timofeev, Sergei; Haase, Wolfgang

doi:10.1063/1.3530444

Cited by 19 publications

(17 citation statements)

References 6 publications

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“…One of the most attractive ways to get fast LC devices is through the use of ferroelectric liquid crystals (FLC) showing microsecond operating times at low electric voltages [9,10,11]. Additionally to the orientational order, such materials are characterized by one-dimensional positional order, describing the distribution of molecular centers of mass in equidistant smectic planes and spontaneous polarization of LC media.…”

Section: Introductionmentioning

confidence: 99%

Capillary Flow and Shear Viscosity of Ferroelectric Liquid Crystal

Shmeliova¹,

Pozhidaev²,

Kharlamov³

et al. 2018

Liq. Cryst. and their Appl.

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Experimentally shown that the shear flow of a ferroelectric smectic C* liquid crystal (FLC) in flat capillary with homeotropic boundary conditions can be described in the framework of the Newtonian fluids theory if the pitch p 0 of the FLC helix is much less than the capillary gap. The motion of the contact line during the filling of the capillary was recorded in the experiment and compared with the theory, which made it possible to estimate the shear viscosity coefficient η  0.5 Pas, which turned out to be much larger than the rotational viscosity coefficient  . In the capillary filling process, the principal optical axis of the FLC helical structure was oriented mainly perpendicular to the substrates, and the smectic layers were parallel to the substrates. At the same time, narrow dislocation bands arose along the flow direction. The principal optical axis deviated from the normal to the substrates at different angles within the dislocation bands. The total area occupied by dislocations does not exceed 5 % of the flow area; therefore, dislocations do not have a significant effect on the rheological behavior of the smectic C* phase.

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Section: Introductionmentioning

confidence: 99%

Capillary Flow and Shear Viscosity of Ferroelectric Liquid Crystal

Shmeliova¹,

Pozhidaev²,

Kharlamov³

et al. 2018

Liq. Cryst. and their Appl.

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show abstract

“…However, the problems were solved gradually, and in recent years, one can observe a significant progress. For example, the work of LPI team participants in cooperation with other researchers allowed finding the conditions of counteracting to the shock [1][2][3]. In addition, the opportunity was shown to suppress the hysteresis of optical properties, when the voltage polarity changes [4,5].…”

Section: Problems and Solutions In Flcmentioning

confidence: 99%

Paper No 9.1: Unique Parameters of Display Cells Based on New FLC, and Prospects of Their Applications (Invited Paper)

Andreev

Kompanets

2013

Symp Digest of Tech Papers

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“…To achieve this goal, certain properties of the liquid crystal material are essential, especially its response time. Unfortunately, the response times for nematic liquid crystals are not fast enough to avoid the color break‐up effect . Because the target liquid crystal cell response time for FSCLCD should be less than 1 ms (τ on + τ off ), each color (RGB) field image must have a frequency higher than 180 Hz (60 Hz frame frequency).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Predesigned Ferroelectric Liquid Crystals and Their Applications in Field‐Sequential Color Displays

Zhang

Liu

Emelyanenko

et al. 2018

Adv Funct Materials

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A series of low transition temperature and fast response chiral smectic C (SmC*) liquid crystals is designed and synthesized. The phase transition behaviors and electrooptical properties of the synthesized compounds are investigated and compared with reported values. The ferroelectric phase of the liquid crystals is characterized by means of differential scanning calorimetry, polarizing optical microscopy, wide-angle X-ray scattering (WAXS), and electrooptical measurements. The wide SmC* phase is achieved via the induction of achiral trisiloxane and a chiral methyl-lateral substituent onto the terminuses of the molecules. The optimized packing arrangement model is studied based on the exceptionally high apparent tilt angles (≈41°) and smectic layer spacing observed using WAXS. A fast response time of 0.3 ms in an electric field of 10 V µm −1 provides an opportunity to use the synthesized materials for field-sequential color liquid crystal displays (FSCLCDs). An FSCLCD sample cell is fabricated using the synthesized ferroelectric liquid crystals via a red (R), green (G), and blue (B) backlight. A color-frame frequency of more than 500 Hz (i.e., a frame frequency more than 166 Hz) is achieved. As a single material liquid crystal display cell, the synthesized ferroelectric liquid crystals show great performances at room temperature.

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Shock-free ferroelectric liquid crystal displays with high optical contrast

Cited by 19 publications

References 6 publications

Capillary Flow and Shear Viscosity of Ferroelectric Liquid Crystal

Capillary Flow and Shear Viscosity of Ferroelectric Liquid Crystal

Paper No 9.1: Unique Parameters of Display Cells Based on New FLC, and Prospects of Their Applications (Invited Paper)

Synthesis of Predesigned Ferroelectric Liquid Crystals and Their Applications in Field‐Sequential Color Displays

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