scholarly journals Investigation of Liquid Crystal Ripple Using Ericksen-Leslie Theory for Displays Subject to Tactile Force

2013 ◽  
Vol 2013 ◽  
pp. 1-11
Author(s):  
Y. J. Lee ◽  
T. S. Liu ◽  
Mao-Hsing Lin ◽  
Kun-Feng Huang
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Tilt Angle ◽  
Optical Transmission ◽  
Liquid Crystal Display ◽  
Viscosity Coefficient ◽  
Equation Of Motion ◽  
Angle Variation ◽  
Analytical Derivation ◽  
Molecule Equation

Liquid crystal display panels subjected to tactile force will show ripple propagation on screens. Tactile forces change tilt angles of liquid crystal molecules and alter optical transmission so as to generate ripple on screens. Based on the Ericksen-Leslie theory, this study investigates ripple propagation by dealing with tilt angles of liquid crystal molecules. Tactile force effects are taken into account to derive the molecule equation of motion for liquid crystals. Analytical results show that viscosity, tactile force, the thickness of cell gap, and Leslie viscosity coefficient lead to tilt angle variation. Tilt angle variations of PAA liquid crystal molecules are sensitive to tactile force magnitudes, while those of 5CB and MBBA with larger viscosity are not. Analytical derivation is validated by numerical results.

Optically Controlled Alignment Of Liquid Crystals

1994 ◽  
Vol 345 ◽  
Author(s):  
Wayne M. Gibbons ◽  
Paul J. Shannon ◽  
Shao-Tang Sun
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Energy Density ◽  
Tilt Angle ◽  
Liquid Crystal Display ◽  
Polarized Light ◽  
Processing Parameters ◽  
Optical Energy ◽  
Important Processing

AbstractOptically controlled homogeneous-to-homogeneous alignment of liquid crystals using polarized light is reviewed. Application of this technology to liquid crystal display manufacturing is discussed. Important processing parameters such as tilt angle and optical energy density will be addressed.

Ideal Liquid Crystal Display Mode Using Achiral Banana-Shaped Liquid Crystals

2006 ◽  
Vol 45 (No. 10) ◽  
pp. L282-L284 ◽  
Author(s):  
Yoshio Shimbo ◽  
Yoichi Takanishi ◽  
Ken Ishikawa ◽  
Ewa Gorecka ◽  
Damian Pociecha ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Liquid Crystal Display ◽  
Ideal Liquid ◽  
Display Mode

scholarly journals In-plane Switching Deformed Helix Ferroelectric Liquid Crystal Display Cells

Crystals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 543 ◽  
Author(s):  
Evgeny P. Pozhidaev ◽  
Timofey P. Tkachenko ◽  
Artemy V. Kuznetsov ◽  
Igor N. Kompanets
Keyword(s):  
Liquid Crystal ◽  
Tilt Angle ◽  
Optical Switching ◽  
Liquid Crystal Display ◽  
Ferroelectric Liquid Crystal ◽  
Natural Feature ◽  
Helix Pitch ◽  
Sub Wavelength

In-plane electro-optical switching (IPS) is a natural feature of a conventional planar-aligned display cell based on the deformed helix ferroelectric liquid crystal effect (DHFLC-effect) with a sub-wavelength helix pitch, if the tilt angle is close to 40 degrees.

Novel Dichroic Polarizing Materials and Approaches to Large-Area Processing

1998 ◽  
Vol 508 ◽  
Author(s):  
Yuri. A. Bobrov ◽  
Sean M. Casey ◽  
Leonid. Y. Ignatov ◽  
Pavel I. Lazarev ◽  
Daniel Phillips ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Liquid Crystal Display ◽  
Substrate Surface ◽  
Continuous Production ◽  
Lyotropic Liquid Crystals ◽  
Large Area ◽  
Rigid Plastic ◽  
Coating Materials ◽  
Wide Range

AbstractWe have developed new polarizing coating materials and processes which enable the fabrication of polarizers for large-area liquid-crystal displays. The polarizing materials are novel discotic surfactants which self-assemble in aqueous solutions to provide a stable liquid-crystalline phase within a wide range of concentrations and temperatures. These lyotropic liquid crystals in an aqueous medium can be spread on a substrate surface by a variety of techniques including a knife-like doctor blade, a rolling cylinder, or a roll-to-roll method. Under the shearing force applied during deposition, the liquid crystals align on the substrate forming a dichroic polarizer. This alignment process allows continuous production of large-area polarizing films at low cost compared with the current technology that requires stretching of the films. Thin coatings can be applied to flexible plastic films, glass, or rigid plastic substrates. Direct coating of the polarizing material on glass eliminates several process steps in liquid-crystal display production since lamination of the polarizing film is no longer required. These new polarizing films have a high optical performance including a polarizing efficiency of above 98% and a dichroic ratio as high as 7.7.

scholarly journals Frank Matthews Leslie. 8 March 1935 – 15 June 2000

2003 ◽  
Vol 49 ◽  
pp. 315-333 ◽  
Author(s):  
R.J. Atkin ◽  
T.J. Sluckin
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Liquid Crystal Display ◽  
Nematic Liquid Crystals ◽  
Continuum Theory ◽  
Hydrodynamic Theory ◽  
Smectic Liquid Crystals ◽  
Applied Mathematician ◽  
Similar Task ◽  
Device Technology

Frank Leslie was a distinguished applied mathematician, who was above all foremost in creating the modern continuum theory of nematic liquid crystals in the late 1960s. This theory is now known as the Ericksen-Leslie theory, and the crucial elements in it as Leslie coefficients. After developing the hydrodynamic theory of nematic liquid crystals, he went on to perform a similar task in the 1990s for smectic liquid crystals. He also actively collaborated with experimentalists and engineers involved in liquid crystal applications, and his work has been extremely influential in the development of liquid crystal display (LCD) device technology.

Photo-Induced Surface Alignment Of Nematic Liquid Crystals On Polyamide-Imide Layers

1995 ◽  
Vol 413 ◽  
Author(s):  
David C. Rich ◽  
Enid K. Sichel ◽  
Peggy Cebet
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Ultraviolet Radiation ◽  
Short Wavelength ◽  
Optical Transmission ◽  
Nematic Liquid Crystals ◽  
Uv Exposure ◽  
Surface Alignment ◽  
Linearly Polarized ◽  
Crystal Cells

ABSTRACTA technique for producing surface-induced liquid crystal nematic alignment is presented. The alignment film is a simple, inexpensive polyamide-imide, which is treated with linearly polarized short wavelength ultraviolet radiation (λ = 254 nm). The alignment performance of UV-aligned layers is shown by optical transmission of the liquid crystal cells to be comparable to that of brushed layers. Strong alignment is produced within minutes of UV exposure and is maintained with long exposures.

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