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Liquid crystal composition and liquid crystal display device
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A technology of liquid crystal composition and compound, applied in liquid crystal materials, optics, instruments, etc., can solve the problems of no high transparent point and high viscosity, etc.
Inactive Publication Date: 2008-03-12
JNC CORP +1
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However, the composition containing this compound does not have a high clearing point, and the viscosity is relatively large
Method used
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Embodiment 1
[0288] The following compositions were prepared, and each characteristic value was measured according to the above method.
[0289] 3-HB(2F,3Cl)-02 (1-1-1) 14%
[0290] 5-HB(2F,3Cl)-02 (1-1-1) 14%
[0291] 3-HHB(2F,3Cl)-02 (1-2-1) 8%
[0292] 5-HHB(2F,3Cl)-02 (1-2-1) 8%
[0293] 3-HH2B(2F,3Cl)-02 (1-2-2) 9%
[0294] 5-HH2B(2F,3Cl)-02 (1-2-2) 9%
[0295] 2-HH-5 (2-1-1) 11%
[0296] 3-HH-4 (2-1-1) 11%
[0297] 3-HB-02 (2-1-2) 8%
[0298] 5-HB-02 (2-1-2) 8%
[0299] NI=69.3°C; Tc≤-20°C; Δn=0.073; Δε=-2.7;
[0300] VHR-1 = 99.4%.
[0301] Compared with Comparative Example 1, the lower limit temperature of the composition of Example 1 is as low as ≤-20° C., and Δn is also smaller. This in turn has a greater voltageretention rate.
Embodiment 2
[0303] The following compositions were prepared, and each characteristic value was measured according to the above method.
[0304] 3-HB(2F,3Cl)-02 (1-1-1) 15%
[0305] 5-HB(2F,3Cl)-02 (1-1-1) 15%
[0306] 3-HHB(2F,3Cl)-02 (1-2-1) 9%
[0307] 5-HHB(2F,3Cl)-02 (1-2-1) 9%
[0308] 3-HBB(2F,3Cl)-02 (1-2-7) 9%
[0309] 5-HBB(2F,3Cl)-02 (1-2-7) 9%
[0310] 2-HH-5 (2-1-1) 11%
[0311] 3-HH-4 (2-1-1) 12%
[0312] 3-HB-02 (2-1-2) 11%
[0313] NI=69.0°C; Tc≤-20°C; Δn=0.086; Δε=-3.0;
[0314] VHR-1 = 99.2%.
[0315] Compared with Comparative Example 1, the lower limit temperature of the composition of Example 2 is as low as ≤-20°C. This in turn has a greater voltageretention rate.
Embodiment 3
[0317] The following compositions were prepared, and each characteristic value was measured according to the above method.
[0318] 3-HB(2Cl,3F)-02 (1-1-4) 5%
[0319] 5-HB(2Cl,3F)-02 (1-1-4) 5%
[0320] 3-H2B(2Cl,3F)-02 (1-1-5) 15%
[0321] 5-H2B(2Cl,3F)-02 (1-1-5) 15%
[0322] 3-HHB(2Cl,3F)-02 (1-2-4) 8%
[0323] 5-HHB(2Cl,3F)-02 (1-2-4) 8%
[0324] 3-HH2B(2Cl,3F)-02 (1-2-5) 12%
[0325] 5-HH2B(2Cl,3F)-02 (1-2-5) 12%
[0326] 5-HH-V (2-1-1) 17%
[0327] V-HHB-1 (2-2-1) 3%
[0328] NI=70.0°C; Tc≤-20°C; Δn=0.075; Δε=-3.4;
[0329] VHR-1 = 99.2%.
[0330] Compared with Comparative Example 1, the lower limit temperature of the composition of Example 3 is as low as ≤ -20°C. This in turn has a greater voltageretention rate.
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Abstract
What are provided include a liquid crystal composition that satisfies many characteristics among the characteristics such as a wide temperature range of a nematic phase, a suitable optical anisotropy, a negatively large dielectricanisotropy, and a large specific resistance, a liquid crystal composition that satisfies the characteristics and simultaneously has a small optical anisotropy and a low minimum temperature of a nematic phase, and preferably approximately -20 DEG C. or less, and a liquid crystaldisplay device containing the composition. The liquid crystal composition has a negative dielectricanisotropy and contains a first component containing a liquid crystal compound containing, as one of the groups having a ring structure, a benzene ring having two hydrogens adjacent to each other replaced by fluorine and chlorine, and a second component containing a liquid crystal compound having a specific structure containing no halogen, and the liquid crystal display device contains the liquid crystal composition.
Description
technical field [0001] The present invention relates to a liquid crystal composition and a liquid crystal display element, in particular to a liquid crystal composition suitable for an active matrix (AM; active matrix) driven liquid crystal display element and a liquid crystal composition containing the composition Liquid crystal display element. Background technique [0002] The liquid crystal display element (in the present invention, the so-called liquid crystal display element refers to the general term of liquid crystal display panel and liquid crystal display module) utilizes the optical anisotropy, dielectric constant anisotropy, etc. that the liquid crystal composition has; The operating modes of the components are known: phase change (PC, phase change) mode, twisted nematic (TN, twisted nematic) mode, super twisted nematic (STN, super twisted nematic) mode, bistable twisted ( BTN, bistable twisted nematic) mode, electrically controlled birefringence (ECB, electrica...
Claims
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Application Information
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