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A technology of liquid crystal medium and compound, applied in the field of liquid crystal medium, to achieve the effect of high positive dielectric anisotropy, fast response time, high-definition bright spot
Active Publication Date: 2008-04-09
MERCK PATENT GMBH
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[0022] Media available from the prior art fail to achieve these advantages while maintaining other parameters
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Embodiment 1
[0215] CC-3-V 40.00% Clearing point [°C]: 75.5
[0216] PP-1-2V1 7.50% Δn[589nm, 20°C]: 0.1165
[0217] PUQU-3-F 14.50% Δε[kHz, 20°C]: +4.9
[0218] PGP-2-3 5.00%¶ 1 [mPa·s, 20°C]: 57
[0219] PGP-2-4 5.00% V 10 [V / ]: 1.94
[0220] CCP-V-1 18.00% V 90 [V]: 2.89
[0221] PGGQU-3-F 7.00%
[0222] CBC-33 3.00%
[0223] This mixture has a lower viscosity than the mixture of Comparative Example 1 having the same birefringence and the same clearing point.
Embodiment 2
[0225] CC-3-V 36.00% Clearing point [°C]: 74.5
[0226] CC-3-V1 7.00% Δn[589nm, 20°C]: 0.1358
[0227] PP-1-2V1 7.50% Δε[kHz, 20°C]: +4.8
[0228] PGU-3-F 8.50%¶ 1 [mPa·s, 20°C]: 58
[0229] PUQU-3-F 3.00% V 10 [V]: 2.02
[0230] PGP-2-3 6.00% V 90 [V]: 2.95
[0231] PGP-2-4 6.00%
[0232] PGP-2-5 8.00%
[0233] CCP-V-1 8.00%
[0234] PGUQU-3-F 9.00%
[0235] CBC-33 1.00%
Embodiment 3
[0237] CC-3-V 46.00% Clearing point [°C]: 73.0
[0238] CP-3-Cl 7.00% Δn[589nm, 20°C]: 0.1344
[0239]PUQU-3-F 3.00% Δε[kHz, 20°C]: +4.7
[0240] PGP-2-3 5.00%¶ 1 [mPa·s, 20°C]: 55
[0241] PGP-2-4 5.00% V 10 [V]: 1.93
[0242] PGP-2-5 6.00% V 90 [V]: 2.85
[0243] MPP-3-F 7.00%
[0244] MPP-5-F 7.00%
[0245] GGP-3-Cl 5.00%
[0246] CCP-V-1 3.00%
[0247] PGUQU-3-F 6.00%
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Abstract
The invention relates to a liquid crystal medium characterized in that it contains one or more I compounds, wherein, R0, X0 and Y1-7 have the right of requiring a meaning stated in 1, the aim of their uses in electrooptics is related, especially the application of use in TN, TFT, IPS or OCB display.
Description
technical field [0001] The invention relates to liquid-crystalline media (LC media), their use for electro-optical purposes and LC displays containing such media. Background technique [0002] Liquid crystals are mainly used as dielectrics in displays because the optical properties of these substances can be changed by an applied voltage. Electro-optic devices based on liquid crystals are extremely well known to those skilled in the art and can be based on various effects. Examples of such devices are cells with dynamic scattering, DAP (deformation of aligned phase) cells, guest / host cells, TN cells with twisted nematic phase structure, STN (super twisted nematic type) liquid crystal cell, SBE (super birefringence effect) liquid crystal cell and OMI (optical mode interference) liquid crystal cell. The most common displays are based on the Schadt-Helfrich effect and have a twisted nematic structure. [0003] Liquid crystal materials must have good chemical and thermal stab...
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