Liquid crystals [electronic resource] . Vol. 3 : applications and uses / edited by Birendra Bahadur.

Format:

Book

Contributor:

Bahadur, Birendra.

Language:

English

Subjects (All):

Liquid crystals.

Crystallography.

Physical Description:

1 online resource (424 p.)

Place of Publication:

Singapore ; Hong Kong : World Scientific, c1992.

Language Note:

English

Summary:

This book reviews comprehensively the technological, scientific, artistic and medical applications of liquid crystals. It starts with the basics of liquid crystals and covers electro-optical, thermo-optical, colour, polymeric, lyotropic, and scientific applications of liquid crystalline materials. It discusses the fabrication and operational principles of a full range of liquid crystal displays including dynamic scattering, twisted nematic, supertwisted nematic, dichroic, smectic A, ferroelectric, polymer dispersed, light valve, active matrix, etc., in detail. It also covers the emerging appli

Contents:

Contents of Other Volumes; Contents; Preface; 5 Surface Alignment of Liquid Crystals; 5.1 INTRODUCTION; 5.2 THEORETICAL BACKGROUND; 5.2.1 Surface Energy and Molecular Alignment; 5.2.2 Physicochemical Interaction and Surface Geometrical Effect; 5.2.3 Objections to Creagh's and Porte's Theories; 5.2.4 Naemura's Theory; 5.3 MECHANISM OF SURFACE ALIGNMENT OF LIQUID CRYSTALS; 5.3.1 Liquid Crystal Alignment on the Cleaned Inorganic Surface; 5.3.2 Modification of the Surface; 5.3.3 Effect of Geometrical Structure of the Surface; 5.4 SURFACE ANCHORING ENERGY

5.5 MATERIALS AND PROCESSES USED FOR ALIGNING LIQUID CRYSTALS IN LCDS5.5.1 Homogeneous Alignment; Polyimide; SiO and Other Similar Dielectrics; PVA Coating; Langmuir-Blodgett Films; Other Methods; High Tilt Homogeneous Alignment; 5.5.2 Homeotropic Alignment; 5.5.3 Alignment for Ferroelectric Liquid Crystals; 5.6 TECHNIQUES FOR MEASURING TILT ANGLES; 5.6.1 Orthoscopic Observation by Microscope; 5.6.2 Conoscopic Observation by Microscope; 5.6.3 Magnetic Null Method; 5.6.4 Other Measurement Methods for Tilt Angles; 5.6.5 Measurement of Twist Angle

5.7 IMPACT OF ALIGNMENT AND TILT ANGLES ON THE ELECTRO-OPTICAL PERFORMANCE OF LCDS5.8 RELIABILITY AND LIFE OF VARIOUS ALIGNMENTS AND ALIGNING AGENTS; References; 11 Dichroic Liquid Crystal Displays; 11.1 INTRODUCTION; 11.2 DICHROIC DYES; 11.2.1 Chemical Structure; 11.2.2 Chemical and Photochemical Stability; 11.2.2.1 THEORETICAL MODELLING; 11.2.2.2 DEFECTS CAUSED BY PROLONGED LIGHT IRRADIATION; 11.2.2.3 CHEMICAL STRUCTURE AND PHOTOSTABILITY; 11.2.2.4 OTHER PARAMETERS AFFECTING PHOTOSTABILITY; 11.3 CELL PREPARATION; 11.4 DICHROIC PARAMETERS AND THEIR MEASUREMENTS

11.4.1 Order Parameter and Dichroic Ratio Of Dyes11.4.2 Absorbance, Order Parameter and Dichroic Ratio Measurements; 11.5 IMPACT OF DYE STRUCTURE AND LIQUID CRYSTAL HOST ONPHYSICAL PROPERTIES OF A DICHROIC MIXTURE; 11.5.1 Order Parameter and Dichroic Ratio; 11.5.1.1 EFFECT OF LENGTH OF DICHROIC DYES ON THE ORDER PARAMETER; 11.5.1.2 EFFECT OF THE BREADTH OF DYE ON THE ORDER PARAMETER; 11.5.1.3 EFFECT OF THE HOST ON THE ORDER PARAMETER; 11.5.1.4 TEMPERATURE VARIATION OF THE ORDER PARAMETER OF DYES IN A LIQUID CRYSTAL HOST; 11.5.1.5 IMPACT OF DYE CONCENTRATION ON THE ORDER PARAMETER

11.5.2 Temperature Range11.5.3 Viscosity; 11.5.4 Dielectric Constant and Anisotropy; 11.5.5 Refractive Indices and Birefringence; 11.5.6 Solubility; 11.5.7 Absorption Wavelength and Auxochromic Groups; 11.5.8 Molecular Engineering of Dichroic Dyes; 11.6 OPTICAL, ELECTRO-OPTICAL AND LIFE PARAMETERS; 11.6.1 Colour And CIE Colour Spaces120160166; 11.6.1.1 CIE 1931 COLOUR SPACE; 11.6.1.2 CIE 1976 CHROMATICITY DIAGRAM; 11.6.1.3 CIE UNIFORM COLOUR SPACES & COLOUR DIFFERENCE FORMULAE120'; 11.6.2 Electro-Optical Parameters120; 11.6.2.1 LUMINANCE; 11.6.2.2 CONTRAST AND CONTRAST RATIO

11.6.2.3 SWITCHING SPEED

Notes:

Description based upon print version of record.

Includes bibliographical references.

ISBN:

9789814360432

9814360430