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Liquid crystal composition, liquid crystal display element, and liquid crystal display

A technology of liquid crystal display element and liquid crystal composition, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., which can solve the problems of insufficient drop mark suppression effect, etc., and achieve good characteristics, less occurrence of screen burn-in, and less drop marks Effect

Inactive Publication Date: 2015-06-24
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, there is a problem of display burn-in caused by the polymeric compound added to the liquid crystal composition, and the effect of suppressing drip marks is insufficient.

Method used

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  • Liquid crystal composition, liquid crystal display element, and liquid crystal display
  • Liquid crystal composition, liquid crystal display element, and liquid crystal display
  • Liquid crystal composition, liquid crystal display element, and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0253] [Example 1, Comparative Example 1]

[0254] Liquid crystal compositions having the compositions shown in Table 1 were prepared, and their physical properties were measured.

[0255] In addition, using the liquid crystal compositions of Example 1 and Comparative Example 1, respectively figure 1 The VA liquid crystal display element shown. This liquid crystal display element has a reverse-stacked thin film transistor as an active element. The injection of the liquid crystal composition was performed by the dropping method (ODF method). Further, the obtained display element was evaluated for burn-in, drop marks, process adaptability and solubility at low temperature by the aforementioned method. The results are shown in Table 2.

[0256] [Table 1]

[0257]

[0258] In Table 1, the compound represented by the chemical formula (b4) of Comparative Example 1 is a compound represented by the structural formula of the following formula (b4).

[0259] [chem 29]

[0260]...

Embodiment 2

[0264] [Example 2, Comparative Example 2]

[0265] Liquid crystal compositions having the compositions shown in Table 3 were prepared, and their physical properties were measured.

[0266] In addition, for the display elements produced in the same manner as in Example 1 using the liquid crystal compositions of Example 2 and Comparative Example 2, evaluations of burn-in, drop marks, process suitability, and solubility at low temperatures were performed. The results are shown in Table 4.

[0267] [table 3]

[0268]

[0269] [Table 4]

[0270]

[0271] The liquid crystal composition of Example 2 has a liquid crystal phase temperature range of 87.3° C. which is practical as a liquid crystal composition for TV, and also has good refractive index anisotropy and dielectric constant anisotropy. In addition, it is also excellent in solubility at low temperature. Further, using the liquid crystal composition of Example 2 to produce figure 1 The VA liquid crystal disp...

Embodiment 3～6

[0273] Liquid crystal compositions having the compositions shown in Table 5 were prepared, and their physical properties were measured.

[0274] In addition, for the display elements produced in the same manner as in Example 1 using the liquid crystal compositions of Examples 3 to 6, evaluations of burn-in, drop marks, process suitability, and solubility at low temperatures were performed. The results are shown in Table 6.

[0275] [table 5]

[0276]

[0277] [Table 6]

[0278]

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PUM

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Abstract

A liquid crystal composition having negative dialectric anisotropy, wherein the liquid crystal composition contains a component (B) including a compound according to formula (1), the compound (B) being a component having neutral dielectric anisotropy; and a dielectric negative component (A) containing two or more types from the group of compounds represented by formulas (2) through (5). R1 and R4 represent a C1-8 alkyl group, and R2 and R3 represent a C1-8 alkyl group or a C2-8 alkenyl group.

Description

technical field [0001] The present invention relates to a liquid crystal composition, a liquid crystal display element and a liquid crystal display using the liquid crystal composition. Background technique [0002] Liquid crystal display elements have developed from clocks and electronic calculators to various measuring instruments, automotive panels, word processors, electronic notepads, printers, computers, televisions, clocks, advertising display boards, etc. Typical liquid crystal display methods include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, VA (Vertical Alignment) type using TFT (Thin Film Transistor), and IPS (In-Plane Switching) type. The liquid crystal composition used in these liquid crystal display elements is required to be stable against external factors such as moisture, air, heat, and light, and to display a liquid crystal phase in as wide a temperature range as possible around room temperature, and to have low viscosity and low driving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30C09K19/12G02F1/13
CPCC09K19/3003C09K19/44C09K19/544C09K2019/0448C09K2019/123C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3016C09K2019/3027G02F1/0045
Inventor 河村丞治岩下芳典
Owner DIC CORP
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