Electro-optic Effects in Polymer Liquid Crystal Solutions PDF Download
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Author: A. I. Hopwood
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: A. I. Hopwood
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Sonja Krause
Publisher: Springer Science & Business Media
ISBN: 1468439146
Category : Science
Languages : en
Pages : 515
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Book Description
The Advanced Study Institute on Molecular Electro-Optics was held on the campus of the Rensselaer Polytechnic Institute, Troy, New York, USA, from July 14 through July 24, 1980. This Advanced Study Institute was attended by sixteen invited lecturers and by forty-eight other participants. The present volume contains the texts of all of the invited lectures presented at the Institute. Although these lectures were supplemented by many animated discussions and by numerous short contributed papers, it was not possible to include these in the present volume. Molecular electro-optics is a difficult subject for research because it incorporates areas of theoretical physics such as elec tromagnetic theory and hydrodynamics of rotational diffusion, ex perimental physics such as lasers, optics, electric pulsers, and data collection via analog to digital converters and signal aver agers, and physical chemistry of macromolecules and colloids in solution (colloid science, biophysical chemistry, double layer polarization). This volume includes chapters on all of these subjects as well as introductions to magnets-optics and to elec trophoretic light scattering. The Advanced Study Institute was sponsored mainly by the North Atlantic Treaty Organization whose financial support made this meeting possible. Additional financial aid was supplied by the National Institutes of Health of the USA through their Fogarty International Center and the National Institute for Arthritis, Metabolism, and Digestive Diseases. Industrial contri buters consisted of the General Electric Company, Cober Electronics, and Malvern Scientific Corporation.
Author: L.M. Blinov
Publisher: Springer Science & Business Media
ISBN: 1461226929
Category : Science
Languages : en
Pages : 477
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Electrooptic effects provide the basis for much liquid-crystal display technology. This book, by two of the leaders in liquid-crystal research in Russia, presents a complete and accessible treatment of virtually all known phenomena occurring in liquid crystals under the influence of electric fields.
Author: Mona Karlsson
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Author: Ernst Lueder
Publisher: John Wiley & Sons
ISBN: 9780470688182
Category : Technology & Engineering
Languages : en
Pages : 516
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In this second edition of Liquid Crystal Displays, Ernst Lueder provides a timely update to his successful text. His unique combination of theory and practice presents all the information required for the development and manufacture of modern high performance and energy saving LCDs. The author also strives for an easy to understand description of complex facts. The second edition focuses on a variety of liquid crystal cells and their electronic addressing, and outlines new developments including: High performance VA cells, especially for TV, due to two subpixels with excellent γ-correction also at oblique viewing Short optical response times in the range of 1 ms also for inter-gray transitions due to novel addressing waveforms Fringe field switching for acceleration of rise and decay of luminance eliminating frame memories Reduction of motion blur by scanning backlights, high frequency frames, edge enhancement and motion blur modeling Very thin LCDs with power saving LED backlights exhibiting unmatched color purity and larger than NTSC color gamut Printed layers on hydrophobic and hydrophilic areas replacing photolithography Practicing electrical engineers, physicists, chemists and display specialists will find this a valuable resource. Researchers will appreciate the practical guidance given for the design of improved LCDs, whilst students are provided with a useful overview of the field. The Society for Information Display (SID) is an international society, which has the aim of encouraging the development of all aspects of the field of information display. Complementary to the aims of the society, the Wiley-SID series is intended to explain the latest developments in information display technology at a professional level. The broad scope of the series addresses all facets of information displays from technical aspects through systems and prototypes to standards and ergonomics
Author: Marcus James Coles
Publisher:
ISBN:
Category :
Languages : en
Pages : 98
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Author: Horst Stegemeyer
Publisher: Springer Science & Business Media
ISBN: 3662083930
Category : Science
Languages : en
Pages : 260
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Book Description
In 1959, about 1400 compounds forming liquid crystalline phases were known; by 1992, this number had increased to about 50 000. In portable devices like wristwatches, pocket caculators, measuring instruments, and laptop computers the liquid crystal display technology has gained total acceptance and is on the way to encompass the market of colour TV screens. This development makes a volume devoted to liquid crystals in the series Topics in Physical Chemistry desirable. Following the concept of this series, an easy introduction to liquid crystals is given, enabling the reader to understand the basic problems of liquid crystals research and application. Because of the widespread field of different research activities in liquid crystals and applications, various competent authors have been involved in writing chapters on: - Phase types, structures, and chemistry of liquid crystals; - Thermodynamical behavior and physical properties of thermotropic liquid crystals; - Liquid crystalline polymers; - Lyotropic liquid crystals; - Application of liquid crystals in spectroscopy; - Application of liquid crystals in display technology.
Author: Sang Hwa Kim
Publisher:
ISBN:
Category : Liquid crystal displays
Languages : en
Pages : 141
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The main objective of the dissertation is to develop polymer stabilized liquid crystals applications with the aim of fast switching liquid crystal devices. We have scrutinized the design of the experimental setup and the optimization of the polymerization condition. We evaluate and discuss various PSLC systems, including the study of morphology of polymer networks and the electro-optical characteristics. Optically compensated bend (OCB) nematic or pi-cell is known to exhibit a fast response time and wide viewing angle with compensated films. But this bend mode has a splay-bend transition problem. These splay and bend states are topologically distinct and for real display modes it should be operated with bend mode without splay state. We introduced a polymer stabilization of the bend nematic mode in which we used polymer network acts as the volume surfaces to stabilize the bend state of the nematic liquid crystal. The switching time of a polymer-stabilized bend nematic display shows a fast rise time of 1.2ms and a 8.8ms decay time, which is sufficiently fast for video display applications. A liquid crystal blazed grating having a prismatic polymer microstructure has been developed using polymer-stabilized optical pattern forming state of a cholesteric liquid crystal. The prismatic polymer structure is formed by photo-induced localization and polymerization of a small concentration of monomer onto one substrate nearest to the UV The light incident at different angles from the normal. Using these method periodical one-dimensional patterns with a prismatic shape of polymer can be structured at the surface. The optical diffraction properties of the gratings were evaluated by the application of electric field and light incident angles, corroborate the blazed grating of asymmetric reflective index modulation. The dissertation continues on the exploration of an application of the short pitch cholesteric liquid crystals. Uniformly lying helix (ULH) of a cholesteric liquid crystal is formed with an applied electric field and temperature to exhibit the flexoelectric effect. For flexoelectro optic device applications, a problem arises in that the unwinding of the cholesteric helix is generally not completely reversible, and can produce degradation of alignment. As a result, the electro optic device does not fully return to the ULH texture after the applied electric field is removed. To address such a problem, we employ the polymer stabilization technique to stabilize the uniform lying helix texture. By using a small concentration of polymer we are able to stabilize ULH texture without the application of an electric field and lead to a device with two switching modes, amplitude (flexoelectric, at low field) and phase (dielectric, at high field) modulation, exhibiting a sub-millisecond response time.
Author: Gaby Nordendorf
Publisher:
ISBN:
Category :
Languages : en
Pages : 98
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Book Description
Polymer-stabilized liquid crystal blue phases are promising candidates for next generation liquid crystal displays. The electro-optic Kerr effect in blue phases provides fast response times and an optically isotropic dark state, without needing any alignment layers. However, obstacles to overcome are high operation voltage, hysteresis and residual birefringence. In this work, the optics of blue phases with visible Bragg reflections are studied. For polymer-stabilized systems, it is shown that the improved performance results from suppression of electrostriction and field-induced phase transitions. In this context, a method to estimate the quality of polymer-stabilization is established. Additionally, blue phase systems with Bragg reflections in the UV range are considered. Mono-functional mesogenic monomers and non-mesogenic cross-linkers are polymerized to stabilize the blue phase, which differs from the commonly used combination of non-mesogenic mono-functional monomers and mesogenic cross-linkers. For this new blue phase system, the electro-optic performance is investigated depending on sample composition and polymerization conditions. The new system shows promising results on the route to bluephase mode display applications. ; eng
Author: Solomon Musikant
Publisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Science
Languages : en
Pages : 196
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