Liquid crystal composition and liquid crystal display device
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A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, and can solve problems such as short life cycle
Active Publication Date: 2019-04-05
JIANGSU HECHENG DISPLAY TECHCO
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[0012] Liquid crystal materials are an important part of liquid crystal displays, and currently global liquid crystal dis
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[0202] Example 1
[0203] The liquid crystal composition of Example 1 was prepared according to the compounds and weight percentages listed in Table 4, which was filled between the two substrates of the liquid crystal display for performance testing. The test data is shown in the following table:
[0204] Table 4 Liquid crystal composition formula and its test performance
[0205]
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[0206] Example 2
[0207] The liquid crystal composition of Example 2 was prepared according to the compounds and weight percentages listed in Table 5, which was filled between the two substrates of the liquid crystal display for performance testing. The test data is shown in the following table:
[0208] Table 5 Liquid crystal composition formula and its test performance
[0209]
[0210]
[0211] As can be seen from Examples 1 and 2, compared with Comparative Example 1, the liquid crystal compositions of Examples 1 and 2 have higher clearing points, greater optical anisotropy, and greater absolute value of dielectric anisotropy. At the same time, the rotational viscosity is smaller and the low temperature stability is better.
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[0216] Example 3
[0217] The liquid crystal composition of Example 3 was prepared according to the compounds and weight percentages listed in Table 7, which was filled between the two substrates of the liquid crystal display for performance testing. The test data is shown in the following table:
[0218] Table 7 Liquid crystal composition formula and its test performance
[0219]
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Abstract
The invention discloses a liquid crystal composition. The liquid crystal composition contains at least one compound of a formula I, and at least one compound of a formula II. The invention also discloses a liquid crystal display device containing the liquid crystal composition. The liquid crystal composition provided by the invention has the characteristics of large absolute value of dielectric anisotropy, good low temperature storage performance, high optical anisotropy, high clearing point, low rotational viscosity and large nematic phase temperature range, has the advantages of fast response speed, high contrast ratio, good weather resistance, and the like, when applied to a display element, and is particularly suitable for use in a liquid crystal display element driven by an active matrix thin film transistor (AM-TFT).
Description
technical field [0001] The invention relates to the field of liquid crystal materials, in particular to a liquid crystal composition and a liquid crystal display device thereof. Background technique [0002] Liquid crystal display elements can be used in various home appliances represented by clocks and electronic calculators, measuring equipment, automotive panels, word processors, computers, printers, televisions, and the like. According to the type of display mode, it is divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrically controlled birefringence), OCB (optically compensated bend, optically compensated bending), IPS (in-plane switching, coplanar transformation), VA (vertical alignment, vertical alignment) and other types. According to the driving method of the component, it is divided into PM (passive matrix, passive matrix) type and...
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