Nematic phase liquid crystal composition

A technology of liquid crystal composition and column phase, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of high charge retention rate, low voltage retention rate, low viscosity, etc., and achieve low viscosity, high resistivity and voltage retention High efficiency and excellent performance

Active Publication Date: 2013-08-21

BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

However, TFT-LCD displays require that the liquid crystal materials used must have good thermal, chemical, electrical, and light stability, high charge retention, low viscosity, and resistivity (ρ≥1.0×10 13 Ω·cm), these properties are unsatisfactory for traditional cyano- and ester-containing compounds

Although biphenyl and phenylcyclohexane liquid crystals containing cyano groups have h...

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Abstract

The invention discloses a nematic phase liquid crystal composition comprising a compound with a first component shown as the general formula I, a compound with a second component shown as the general formula II, a compound with a third component shown as the general formula III, a compound with a fourth component shown as the general formula IV and a compound with a fifth component shown as the general formula V. The nematic phase liquid crystal composition disclosed by the invention has very low overall response time, lower voltage, high resistivity and voltage retention rate, low viscosity, short response time and proper optical anisotropy and dielectric anisotropy; after being treated at high temperature, the nematic phase liquid crystal composition still has high resistivity and excellent high temperature and ultraviolet stability, can be used for a photoelectric display with an active matrix address, and is particularly suitable for manufacturing active matrix TN-TFT (Twisted Nematic Thin Film Transistor) and IPS-TFT (In-Plane Switching Thin Film Transistor) liquid crystal display elements and liquid crystal displays which are rapid in response.

Application Domain

Liquid crystal compositions

Technology Topic

High resistivityChemistry +6

Image

Examples

Experimental program(1)

Example Embodiment

[0062] The performance parameters of Example 1 show that the nematic liquid crystal combination has good low-temperature miscibility, high clearing point, large dielectric anisotropy, fast response time, good high temperature and UV stability, and is suitable for low-voltage driving MOBLE-type TN -TFR display.

[0063] Table 2 The formulation of the nematic liquid crystal composition of Example 2 and its test performance parameters

[0064]

[0065]

[0066] It can be seen from the performance parameters of Example 2 that the nematic liquid crystal composition has good low temperature miscibility, wide nematic temperature range, large dielectric anisotropy, fast response time, and good high temperature and UV stability.

[0067] Table 3 The formulation of the nematic liquid crystal composition of Example 3 and its test performance parameters

[0068]

[0069]

[0070]It can be seen from the performance parameters of Example 3 that the nematic liquid crystal composition has good low-temperature miscibility, wide nematic temperature range, fast response time, high resistivity and voltage retention, and is suitable for fast-response TN-TFT displays. .

[0071] Table 4 The formulation of the nematic liquid crystal composition of Example 4 and its test performance parameters

[0072]

[0073]

[0074] From the performance parameters of Example 4, it can be seen that the nematic liquid crystal composition has good low temperature mutual solubility, moderate clearing point and dielectric anisotropy, moderate optical anisotropy, good high temperature and ultraviolet stability, and fast response speed. TN-TFT display for MNT or NB.

[0075] Table 5 The formulation of the nematic liquid crystal composition of Example 5 and its test performance parameters

[0076]

[0077]

[0078] From the performance parameters of Example 5, it can be seen that the nematic liquid crystal composition has good low temperature mutual solubility, high clearing point, large dielectric anisotropy, moderate optical anisotropy, good high temperature and ultraviolet reliability, and is suitable for TN or IPS mode monitor.

[0079] Table 6 The formulation of the nematic liquid crystal composition of Example 6 and its test performance parameters

[0080]

[0081]

[0082] It can be seen from the performance parameters of Example 6 that the nematic liquid crystal composition has moderate birefringence, moderately high dielectric anisotropy, and high clearing point, and is suitable for automotive IPS-TFTs with fast response at low temperature monitor.

[0083] Table 7 The formulation of the nematic liquid crystal composition of Example 7 and its test performance parameters

[0084]

[0085]

[0086] It can be seen from the performance parameters of Example 7 that the nematic liquid crystal composition has high clearing point, low rotational viscosity and good stability, and is suitable for fast-response IPS-TFT displays.

[0087] Table 8 The formulation of the nematic liquid crystal composition of Example 8 and its test performance parameters

[0088]

[0089]

[0090] It can be seen from the performance parameters of Example 8 that the nematic liquid crystal composition has moderate birefringence, moderately high dielectric anisotropy, high clearing point, very low threshold voltage, and very low rotation. Viscosity, fast response time, suitable for fast response IPS-TFT displays.

[0091] Table 9 The formulation of the nematic liquid crystal composition of Example 9 and its test performance parameters

[0092]

[0093]

[0094] It can be seen from the performance parameters of Example 9 that the nematic liquid crystal composition has moderate birefringence, high dielectric anisotropy, low threshold voltage, low rotational viscosity and fast response time, and is suitable for fast-response IPS-TFT monitor.

[0095] Table 10 The formulation of the nematic liquid crystal composition of Example 10 and its test performance parameters

[0096]

[0097]

[0098] From the performance parameters of Example 10, it can be seen that the nematic liquid crystal composition has good low temperature mutual solubility, high clearing point, large dielectric anisotropy, moderate optical anisotropy, good high temperature and ultraviolet reliability, and is suitable for TN or IPS mode monitor.

[0099] Table 11 The formulation of the nematic liquid crystal composition of Example 11 and its test performance parameters

[0100]

[0101]

[0102] It can be seen from the performance parameters of Example 11 that the nematic liquid crystal composition has good low temperature miscibility, wide nematic temperature range, large dielectric anisotropy, fast response time, and good high temperature and UV stability.

[0103] Table 12 The formulation of the nematic liquid crystal composition of Example 12 and its test performance parameters

[0104]

[0105]

[0106] It can be seen from the performance parameters of Example 12 that the nematic liquid crystal composition has good low-temperature miscibility, wide nematic temperature range, fast response time, high resistivity and voltage retention, and is suitable for fast-response TN-TFT displays .

[0107] Table 13 The formulation of the nematic liquid crystal composition of Example 13 and its test performance parameters

[0108]

[0109]

[0110] It can be seen from the performance parameters of Example 13 that the nematic liquid crystal composition has good low temperature mutual solubility, moderate clearing point and dielectric anisotropy, moderate optical anisotropy, good high temperature and ultraviolet stability, and fast response speed, and is suitable for TN-TFT display for MNT or NB.

[0111] Table 14 The formulation of the nematic liquid crystal composition of Example 14 and its test performance parameters

[0112]

[0113]

[0114] From the performance parameters of Example 14, it can be seen that the nematic liquid crystal composition has good low temperature mutual solubility, high clearing point, large dielectric anisotropy, moderate optical anisotropy, and good high temperature and ultraviolet reliability. IPS mode monitor.

[0115] Table 15 The formulation of the nematic liquid crystal composition of Example 15 and its test performance parameters

[0116]

[0117]

[0118] It can be seen from the performance parameters of Example 15 that the nematic liquid crystal composition has moderate birefringence, moderately high dielectric anisotropy, and high clearing point, and is suitable for automotive IPS-TFTs with rapid response at low temperature monitor.

[0119] Table 16 The formulation of the nematic liquid crystal composition of Example 16 and its test performance parameters

[0120]

[0121] From the performance parameters of Example 16, it can be seen that the nematic liquid crystal combination has good low-temperature miscibility, high clearing point, large dielectric anisotropy, fast response time, good high temperature and UV stability, and is suitable for low-voltage drive MOBLE type. TN-TFR display.

[0122] From Examples 1 to 16, it can be seen that the nematic liquid crystal composition can maintain a fast response time in the low temperature region, can broaden the use temperature of TN and IPS liquid crystal modes, and has a faster response time and a wider range. The viewing angle range is very suitable for TN and IPS monitors.

[0123] Although the present invention only enumerates the specific substances and proportioning mass percentages of the above-mentioned 16 embodiments, and tests the performance of the liquid crystal composition formed, the liquid crystal composition of the present invention can be used on the basis of the above-mentioned embodiments. The compounds represented by the general formulae I, II, III, IV, V, VI, VII, VIII, and the preferred compounds of the general formulae I, II, III, IV, V, VI, VII, VIII involved in the present invention were subjected to Further expansion and modification can all achieve the purpose of the present invention.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Low overall response time
Excellent performance

Positive dielectric liquid crystal composition

ActiveCN103820127AExcellent performanceLow overall response timeLiquid crystal compositionsChemistryDielectric anisotropy

Owner:BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD

Nematic phase liquid crystal composition

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

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Description & Claims & Application Information

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