Nematic liquid crystal composition, and liquid crystal display element using same

A technology for liquid crystal display elements and liquid crystal compositions, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, can solve the problems of unsatisfactory high-speed responsiveness, and achieve excellent display quality, poor display suppression, and fast response speed. Effect

Inactive Publication Date: 2016-07-27
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] This liquid crystal composition uses liquid crystal compounds (C) and (D), which are compounds whose Δε is approximately 0, but the high-speed responsiveness of this liquid crystal composition does not satisfy the performance required for use in liquid crystal televisions, etc.

Method used

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  • Nematic liquid crystal composition, and liquid crystal display element using same
  • Nematic liquid crystal composition, and liquid crystal display element using same
  • Nematic liquid crystal composition, and liquid crystal display element using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5、 comparative example 1～5-2

[0585] Prepare LC-1~LC-5 (Examples 1~5), LC-1′~LC-5” (Comparative Example 1~Comparative Example 5-2). The composition and physical properties of the liquid crystal composition are shown in Table 1 Note that the symbols on the left side of the content are abbreviated descriptions of the above-mentioned compounds.

[0586] [Table 1]

[0587]

[0588] The liquid crystal compositions LC-1, LC-2, LC-3, LC-4 and LC-5 of the present invention contain the compound represented by the general formula (i), so they are different from those that do not contain the compound represented by the general formula (i). Compared with the liquid crystal composition LC-1'~LC-5" (comparative example), γ 1 Small enough, K 33 Larger, so the index of response speed is γ 1 / K 33 A smaller value is displayed, and when the response speed is actually measured, the response speed is improved at the same rate. In addition, using the liquid crystal compositions LC-1 to LC-5, FFS mode liquid crystal dis...

Embodiment 6

[0590] (Example 6, Comparative Example 6)

[0591] LC-6 (Example 6), and LC-6' (Comparative Example 6) were prepared. Table 2 shows the composition of the liquid crystal composition and its physical properties.

[0592] [Table 2]

[0593]

[0594] Since the liquid crystal composition LC-6 of the present invention contains the compound represented by the general formula (i), compared with the liquid crystal composition LC-6' (comparative example) not containing the compound represented by the general formula (i), K 33 Larger, so the index of response speed is γ 1 / K 33 A smaller value is displayed, and when the response speed is actually measured, the response speed is improved at the same rate. In addition, using the liquid crystal composition LC-6, an FFS mode liquid crystal display element was produced, and the voltage retention, burn-in, transmittance, and solubility at low temperature were evaluated by the above-mentioned method, and the results showed extremely exc...

Embodiment 7～9、 comparative example 7～9

[0597] LC-7 to LC-9 (Examples 7 to 9) and LC-7' to LC-9' (Comparative Examples 7 to 9) were prepared. Table 3 shows the composition of the liquid crystal composition and its physical properties.

[0598] [table 3]

[0599]

[0600] Since the liquid crystal compositions LC-7 to LC-9 of the present invention contain the compound represented by the general formula (i), they are different from the liquid crystal compositions LC-7' to LC-9 which do not contain the compound represented by the general formula (i). ' (comparative example) compared to K 33 Larger, so the index of response speed is γ 1 / K 33 A smaller value is displayed, and when the response speed is actually measured, the response speed is improved at the same rate. In addition, using liquid crystal compositions LC-7 and LC-8, FFS mode liquid crystal display elements were produced, and liquid crystal composition LC-9 was used to produce VA mode liquid crystal display elements, and the voltage retention rate and...

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Abstract

Provided are: a liquid crystal composition which, without causing a decrease in the refractive index anisotropy (delta n) or the nematic phase-isotropic liquid phase transition temperature (Tni), has a sufficiently low viscosity (eta), a sufficiently low rotational viscosity (gamma 1), a high elastic constant (K33), and a large absolute value for negative dielectric constant anisotropy (delta epsilon); and a liquid crystal display element which uses the liquid crystal composition, in which display defects are non-existent or suppressed in VA type displays and the like, which exhibits excellent display quality, and which exhibits a rapid response speed. Specifically, provided are: a liquid crystal composition which has negative dielectric constant anisotropy, contains one or more compounds represented by general formula (i) as a first component, and contains one or more compounds selected from among compounds represented by general formula (L) as a second component; and a liquid crystal display element which uses the liquid crystal composition.

Description

technical field [0001] The present invention relates to a nematic liquid crystal composition having a negative dielectric constant anisotropy (Δε) useful as a liquid crystal display material, and a liquid crystal display element using the same. Background technique [0002] Liquid crystal display elements are used in various electrical appliances for households such as clocks and calculators, measuring instruments, panels for automobiles, word processors, electronic notebooks, printers, computers, televisions, and the like. As a liquid crystal display method, representative examples include: TN (Twisted Nematic, twisted nematic) type, STN (SuperTwisted Nematic, super twisted nematic) type, DS (Dynamic lightscattering, dynamic light scattering) type, GH (GuestHost, guest-host) type , IPS (InPlaneSwitching, plane switching) type, OCB (Optically Compensated Birefringence, optically compensated birefringence) type, ECB (Electrically Controlled Birefringence, voltage controlled b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30C09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/24C09K19/32C09K19/34C09K19/38C09K19/42C09K19/54G02F1/13G02F1/1337
CPCC09K2019/0448C09K2019/123C09K2019/3027C09K19/3066C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3016C09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/24C09K19/30C09K19/32C09K19/42G02F1/13G02F1/1337C09K19/3003C09K19/3402C09K19/542C09K2019/3422C09K2019/548G02F1/1362
Inventor 丸山和则平田真一
Owner DIC CORP
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