Low-(Delta)<i>n</i>-twisted nematic cell with improved optical properties

Pohl, L.; Weber, G.; Eidenschink, Rudolf; Baur, G.; Fehrenbach, W.

doi:10.1063/1.92421

Cited by 48 publications

(4 citation statements)

References 4 publications

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“…In the AM drive (Section IX), fast response times and, therefore, thin cell gaps are important and an condition, which is generally referred to as the first minimum condition, is often chosen. The first minimum condition ensures a wide viewing angle [46].…”

Section: Transmission Minimums In Normally Black Casementioning

confidence: 99%

The history of liquid-crystal displays

Kawamoto¹

2002

Proc. IEEE

284

127

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The modern history of liquid crystals has been dominated by the development of electronic displays. These developments began in 1964, when Heilmeier of RCA Laboratories discovered the guest-host mode and the dynamic-scattering mode. He thought a wall-sized flat-panel color TV was just around the corner. From that point on, twisted-nematic (TN) mode, super TN mode, amorphous-Si field-effect transistor, and room-temperature liquid crystals were developed. In the beginning, liquid-crystal displays (LCDs) were limited to niche applications such as small-size displays for digital watches, pocket calculators, and small handheld devices. That all changed with the development of the notebook computer industry. In 1988, Washizuka et al. of Sharp Corporation demonstrated an active-matrix full-color full-motion 14-in display using a thin-film-transistor array. The electronics industries now recognized that Heilmeier's 25-year dream of a wall-hanging television had become reality. LCDs could be used to replace existing cathode ray tubes. Through the cooperation and competition of many electronics giants, the LCD industry was firmly established.

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Section: Transmission Minimums In Normally Black Casementioning

confidence: 99%

The history of liquid-crystal displays

Kawamoto¹

2002

Proc. IEEE

284

127

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“…Unfortunately, the presence of the second oxygen atom in the chain usually results in a low nematic clearing point [24][25][26]. However, nematic LCs with two 1,4-disubstituted trans-cyclohexane rings in the molecular core often exhibit a high clearing point [2][3][4][5]. Therefore, such LCs incorporating an alkoxyalkoxy chain may be expected to induce a nematic phase with a reasonably high clearing point as well as low values of the viscosity and the birefringence with advantageous values of the elastic and dielectric constants.…”

Section: Introductionmentioning

confidence: 99%

“…Apolar nematic liquid crystals of low birefringence and low viscosity are required as components of nematic mixtures for liquid crystal displays (LCDs) with high information content and short switching times [1][2][3][4][5][6]. The twisted-nematic LCD (TN-LCD) [1] with even modest information content uses a multiplexed addressing scheme.…”

Section: Introductionmentioning

confidence: 99%

Apolar 2‐alkoxyalkoxy‐substituted nematic liquid crystals

2007

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The synthesis is reported of a series of apolar nematic liquid crystals incorporating an alkoxyalkoxy chain attached in a terminal position to the molecular core. The dependence of the mesomorphism and phase transition temperatures on the nature of the terminal chain with one, two or three oxygen atoms was studied. Some compounds with a completely alicyclic molecular core and a terminal 2-methoxyethoxy chain exhibit a nematic phase with a low melting point, birefringence and viscosity and a relatively high clearing point in the absence of smectic phases. They do not to absorb light in the near UV and may be useful as components of UV-stable nematic mixtures for use in photoluminescent liquid crystal displays. The presence of the methoxyethoxy chain leads to a relatively large dipole moment perpendicular to the molecular long axis.

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“…1,2 However, due to its limited viewing angle, such devices are seldom considered for direct-view displays. A general approach for widening viewing angle is to reduce the d⌬n of the LC layer, 3,4 here d represents the cell gap and ⌬n the LC birefringence. Another approach is to use the optically compensated bend ͑OCB͒ cell.…”

Section: Introductionmentioning

confidence: 99%

A biaxial film-compensated thin homogeneous cell for reflective liquid crystal display

1998

Journal of Applied Physics

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Two-dimensional measurements of cell parameter distributions in reflective liquid crystal displays by using multiple wavelengths Stokes parameters J. Appl. Phys. 95, 4371 (2004); 10.1063/1.1650892 Effects of cell structure on the reflection of cholesteric liquid crystal displaysComputer simulations on the display characteristics of a biaxial film compensated thin homogeneous liquid crystal cell are performed. Results indicate that the biaxial film-compensated reflective displays exhibit a relatively weak wavelength dispersion, wide viewing angle, high contrast ratio, low operation voltage, abundant gray scale, and fast response time. Their potential applications for reflective direct-view and color-sequential projection displays are emphasized.

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Low-(Delta)n-twisted nematic cell with improved optical properties

Abstract: It is demonstrated by model calculations and experimental results, that the range of viewing angles of a twisted nematic (TN) display can be considerably improved by using a liquid-crystal material with a low refractive index anisotropy Dn<0.1.

Cited by 48 publications

References 4 publications

The history of liquid-crystal displays

The history of liquid-crystal displays

Apolar 2‐alkoxyalkoxy‐substituted nematic liquid crystals

A biaxial film-compensated thin homogeneous cell for reflective liquid crystal display

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Low-(Delta)n-twisted nematic cell with improved optical properties

Abstract: It is demonstrated by model calculations and experimental results, that the range of viewing angles of a twisted nematic (TN) display can be considerably improved by using a liquid-crystal material with a low refractive index anisotropy Dn&lt;0.1.

Cited by 48 publications

References 4 publications

The history of liquid-crystal displays

The history of liquid-crystal displays

Apolar 2‐alkoxyalkoxy‐substituted nematic liquid crystals

A biaxial film-compensated thin homogeneous cell for reflective liquid crystal display

Contact Info

Product

Resources

About

Abstract: It is demonstrated by model calculations and experimental results, that the range of viewing angles of a twisted nematic (TN) display can be considerably improved by using a liquid-crystal material with a low refractive index anisotropy Dn<0.1.