Liquid crystal composition having good light and heat stability and liquid crystal display element

Abstract

The invention provides a liquid crystal composition having good light and heat stability. The liquid crystal composition is prepared from a compound accounting for 5-30% of the total weight of the liquid crystal composition and shown by one or more general formulas I, a compound accounting for 1-30% of the total weight of the liquid crystal composition and shown by one or more general formulas II, a compound accounting for 1-30% of the total weight of the liquid crystal composition and shown by one or more general formulas III, a compound accounting for 1-20% of the total weight of the liquid crystal composition and shown by one or more general formulas IV-1 and IV-2 and a compound accounting for 15-50% of the total weight of the liquid crystal composition and shown by one or more general formulas V, and the liquid crystal composition has large dielectric anisotropy, appropriate high optical anisotropy, low viscosity and good light and heat stability and is suitable for liquid crystal display devices. The invention further provides the liquid crystal display device containing the liquid crystal composition.

Description

technical field

[0001] The invention relates to a liquid crystal composition and a liquid crystal display element, in particular, a liquid crystal composition with good light and thermal stability and its application in a liquid crystal display element. Background technique

[0002] At present, the application range of liquid crystal compounds is becoming wider and wider, and they can be applied to various types of displays, electro-optic devices, sensors, and the like. There are various types of liquid crystal compounds used in the above fields, among which the nematic liquid crystal compounds are most widely used. For example, nematic liquid crystal compounds have been used in passive TN, STN matrix displays and systems with TFT active matrices.

[0003] For the application field of thin film transistor technology (TFT-LCD), although the market has become very large in recent years and the technology has gradually matured, people's requirements for display technology are ...

Examples

Embodiment 1

[0127] The liquid crystal composition of Example 1 was prepared by each compound listed in Table 3 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0128] Table 3 liquid crystal composition formula and test performance thereof

[0129]

Embodiment 2

[0131] The liquid crystal composition of Example 2 was formulated according to the compounds and weight percentages listed in Table 4, and it was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the table below:

[0132] Table 4 liquid crystal composition formula and test performance thereof

[0133]

Embodiment 3

[0135] The liquid crystal composition of Example 3 was prepared by each compound listed in Table 5 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0136]Table 5 liquid crystal composition formula and test performance thereof

[0137]

technical field

[0001] The invention relates to a liquid crystal composition and a liquid crystal display element, in particular, a liquid crystal composition with good light and thermal stability and its application in a liquid crystal display element. Background technique

[0002] At present, the application range of liquid crystal compounds is becoming wider and wider, and they can be applied to various types of displays, electro-optic devices, sensors, and the like. There are various types of liquid crystal compounds used in the above fields, among which the nematic liquid crystal compounds are most widely used. For example, nematic liquid crystal compounds have been used in passive TN, STN matrix displays and systems with TFT active matrices.

[0003] For the application field of thin film transistor technology (TFT-LCD), although the market has become very large in recent years and the technology has gradually matured, people's requirements for display technology are ...

Examples

Embodiment 1

[0127] The liquid crystal composition of Example 1 was prepared by each compound listed in Table 3 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0128] Table 3 liquid crystal composition formula and test performance thereof

[0129]

Embodiment 2

[0131] The liquid crystal composition of Example 2 was formulated according to the compounds and weight percentages listed in Table 4, and it was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the table below:

[0132] Table 4 liquid crystal composition formula and test performance thereof

[0133]

Embodiment 3

[0135] The liquid crystal composition of Example 3 was prepared by each compound listed in Table 5 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0136]Table 5 liquid crystal composition formula and test performance thereof

[0137]

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