High-clearing-point and high-refractive-index anisotropic negative liquid crystal composition and application thereof
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A liquid crystal composition, high refractive index technology, applied in liquid crystal materials, nonlinear optics, optics, etc., can solve problems such as the risk of damage to the display, and achieve the effects of allowing time and cost, reducing pre-tilt angle, and effective manufacturing process
Active Publication Date: 2015-10-14
JIANGSU HECHENG DISPLAY TECHCO
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Problems solved by technology
However in the manufacturing process of PSA displays it is desirable to avoid exposure to such short wavelength UV radiation as these "intense UV components" are harmful and increase the risk of damage to the various materials and components used in the display
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preparation example Construction
[0185] The preparation method of the compound of general formula I:
[0186] Step 1) the compound of general formula Ia
[0187]
[0188] Carry out hydrogenation reaction, obtain the compound of general formula IIa
[0189]
[0190] Step 2) After reacting the compound of general formula IIa with p-bromophenol, triphenylphosphine, tetrahydrofuran and diethyl azodicarboxylate, the compound of general formula IIIa is obtained
[0191]
[0192] Step 3) combining the compound of general formula Ⅲa with the compound of Ⅳa
[0193]
[0194] Potassium carbonate, tetrakis (triphenylphosphine) palladium, toluene, ethanol and water react, obtain the negative liquid crystal compound of described general formula I
[0195]
[0196] in,
[0197] R 1 and R 2 The same or different, each independently represents H, an alkyl or alkoxy group with 1-10 carbon atoms, or an alkenyl or alkenyloxy group with 2-10 carbon atoms;
[0198] ring express or
[0199] n represents...
Embodiment 1
[0226] 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:
[0227] Table 3 liquid crystal composition formula and test performance thereof
[0228]
[0229]
Embodiment 2
[0235] The liquid crystal composition of Example 2 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:
[0236] Table 5 liquid crystal composition formula and test performance thereof
[0237]
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viscosity
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Abstract
The invention discloses a high-clearing-point and high-refractive-index anisotropic negative liquid crystal composition which includes one or more of compounds represented as the general formula I, one or more of compounds represented as the general formula II, one or more of compounds represented as the general formula III, one or more of compounds represented as the general formula IV and/or one or more of compounds represented as the general formula V. The liquid crystal composition is high in response speed, low in rotation viscosity, high in clearing point, high in optical-anisotropy and high in dielectric-anisotropy. A liquid crystal display device employing the liquid crystal composition is quick in response, is high in clearing point and is low in driving voltage, can achieve balance of all performances and is suitable for liquid crystal displayer in the modes of VA, IPS or ECB. In addition, the polymerization wave band of a liquid crystal medium containing the liquid crystal composition can be closed to a large wave band, so that the liquid crystal medium can be used for producing the display device with a long UV wavelength, thereby reducing or avoiding harmful and damaging effect due to a short UV light component. The liquid crystal composition can be widely used in liquid crystal displayers in the modes of PSA, PSVA or PNLC.
Description
technical field [0001] The invention relates to a negative liquid crystal composition with high-definition bright spots, relatively high refractive index anisotropy, suitable dielectric anisotropy and good UV resistance, and the application of the liquid crystal composition in liquid crystal display elements. 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. As the night scene display method, PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electronically controlled birefringence), OCB (optical compensated bend, optically compensated bending), IPS (in-plane switching, coplanar transition), VA (vertical alignment, vertical alignment), CSH (color super homeotr...
Claims
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