Journal ArticleDOI
Optical properties of general twisted nematic liquid‐crystal displays
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TLDR
In this paper, an analytic expression for the optical field propagating normally in a general twisted nematic liquid-crystal structure was obtained for the first time, based upon which the optical transmissions of the general twisted nematic liquidcrystal displays (including standard twisted, super twisted, supertwisted birefringence effect, lower twisted, and optical mode interference) with arbitrary polarizer orientations, liquid crystal indices of refraction, twist angle, surface pretilt angle, and cell thickness were discussed.Abstract:
An analytic expression for the optical field propagating normally in a general twisted nematic liquid‐crystal structure is obtained for the first time. Based upon this, analytic expressions are obtained for the optical transmissions of the general twisted nematic liquid‐crystal displays (including standard twisted nematic, supertwisted, supertwisted birefringence effect, lower twisted, and optical mode interference) with arbitrary polarizer orientations, liquid‐crystal indices of refraction, twist angle, surface pretilt angle, and cell thickness. Routes for improving the display performances are discussed.read more
Citations
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Journal ArticleDOI
Origin and characteristics of the optical properties of general twisted nematic liquid‐crystal displays
TL;DR: In this article, the origin and characteristics of the field-off state optical properties of the general twisted nematic liquid-crystal displays (LCD) are discussed and the interference between the two normal modes explains precisely, for the first time, the working mechanism for the field off state optical performance of all twisted-nematic liquid crystal displays.
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Journal ArticleDOI
Electro‐optics of electrically controlled birefringence liquid‐crystal displays by 2×2 propagation matrix and analytic expression at oblique angle
TL;DR: In this article, a 2×2 propagation matrix for obliquely propagating light is used to compute the electro-optics of an electrically controlled birefringence liquid crystal display, with arbitrary viewing angle.
Journal ArticleDOI
2 × 2 propagation matrix for electromagnetic waves propagating obliquely in layered inhomogeneous uniaxial media
TL;DR: In this article, a 2 × 2 propagation matrices for finding the obliquely propagating electromagnetic fields in layered inhomogeneous uniaxial structures is presented, which is based on the generalized geometrical-optics approximation method.
Journal ArticleDOI
Optimization of the off-states for single-layer and double-layer general twisted nematic liquid-crystal displays
TL;DR: In this paper, the Jones matrix was used to obtain an analytic closed-form expression for the optical transmission of a general double-layer twisted nematic (TN) liquid-crystal display with arbitrary twist angles and uniform pretilt angles.
References
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Journal ArticleDOI
Voltage-Dependent Optical Activity of a Twisted Nematic Liquid Crystal
Martin Schadt,Wolfgang Helfrich +1 more
TL;DR: In this paper, a new electrooptical effect in twisted nematic liquid crystals is described which allows variation of the rotation of linearly polarized light continuously from 0° to 90°.
Journal ArticleDOI
The optical properties of twisted nematic liquid crystal structures with twist angles ⩽90 degrees
C H Gooch,H A Tarry +1 more
TL;DR: In this paper, it was shown that a liquid-crystal twisted nematic structure can be made with twist angles other than the conventional 90 degrees, and that theoretically the transmission of such a structure when placed between two polarizers aligned parallel and perpendicular to the respective surface molecular directors is given by T=( 1+u2)-1 sin2( theta (1+u 2)12/) where u= pi d Delta n/ theta lambda, and theta is the twist angle, d being the cell thickness, Delta n the refractive index anisotropy
Journal ArticleDOI
Design of Highly Multiplexed Liquid Crystal Dye Displays
TL;DR: In this paper, the importance of various relevant device and material parameters are discussed and optimum conditions for multiplexing at levels over 1 in 100 are found for 3π/2 dye displays.
Journal ArticleDOI
The van der Waals theory of nematic liquids
TL;DR: The van der Waals theory of nematic liquids as discussed by the authors is an approximate molecular theory in which very short-range intermolecular repulsions are approximated by hard-rod exclusions, and somewhat longer-ranged intermolescular attractions are subject to a self-consistent mean-field treatment.
Journal ArticleDOI
Electro‐optical characteristics of a new liquid‐crystal display with an improved gray‐scale capability
TL;DR: In this paper, a new liquid crystal display (LCD) was presented with a much better gray-scale capability than twisted nematic LCD's and a comparably good contrast, which is particularly suited for active matrix applications.
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Origin and characteristics of the optical properties of general twisted nematic liquid‐crystal displays
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