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Liquid crystal composition and liquid crystal display device thereof

A technology of liquid crystal compositions and compounds, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve problems such as slow response speed, inability to display fast-moving pictures, and impact on energy-saving and environmental protection performance of liquid crystal display devices

Active Publication Date: 2020-05-08
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They all have their own advantages and disadvantages: MVA mode has the characteristics of high contrast and fast response, but it needs a biaxial compensation film and two elliptical polarizers, so the cost is higher; OCB mode is difficult to maintain stable control with AC voltage , the transmittance of R, G, and B monochromatic light is also different. In addition, in the case of no field, the molecules in the liquid crystal cell are arranged in a direction parallel to the substrate. In order to achieve a curved arrangement, it is necessary to Add a voltage to the box for a few seconds to preset, and then maintain this arrangement at a lower voltage, which is inconvenient to use; IPS mode only needs a linear polarizer without a compensation film, but its response speed is too fast Slow, unable to display fast-moving pictures
[0015] In addition, in order to maintain a sufficiently high transmittance, the absolute value of the dielectric anisotropy of most liquid crystal compositions in the prior art is relatively low, resulting in a relatively high driving voltage of a liquid crystal display device comprising such a liquid crystal composition, The direct result is that the energy-saving and environmental protection performance of liquid crystal display devices is affected

Method used

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  • Liquid crystal composition and liquid crystal display device thereof
  • Liquid crystal composition and liquid crystal display device thereof
  • Liquid crystal composition and liquid crystal display device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0230] The liquid crystal composition of Example 1 was prepared according to the compounds and weight percentages listed in Table 3, which was filled between the two substrates of the liquid crystal display for performance testing.

[0231] Table 3 liquid crystal composition formula and performance parameter test

[0232]

[0233]

Embodiment 2

[0235] The liquid crystal composition of Example 2 was formulated 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.

[0236] Table 4 liquid crystal composition formula and performance parameter test

[0237]

Embodiment 3

[0239] The liquid crystal composition of Example 3 was formulated 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.

[0240] Table 5 liquid crystal composition formula and performance parameter test

[0241]

[0242]

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PUM

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Abstract

The invention provides a liquid crystal composition, which comprises at least one compound represented by a general formula I, at least one compound represented by a general formula II-1 and / or general formula II-2, at least one compound represented by a general formula M, and at least one compound represented by a general formula N. The invention also provides a liquid crystal display device containing the liquid crystal composition. The liquid crystal composition provided by the invention has properly high optical anisotropy, properly high clearing point, good low-temperature stability, highdielectric anisotropy, high transmittance and large elastic constant. When the liquid crystal composition is applied to an IPS liquid crystal display device, the transmittance of the display device can be effectively improved, so that the display device has a good display effect and also has good energy-saving and environment-friendly characteristics.

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 (LCD) has been developed rapidly due to its small size, light weight, low power consumption and excellent display quality, and is especially widely used in portable electronic information products. With the increase in the size of LCD screens for portable computers, office applications, and video applications, there are still some problems to be solved in order to enable LCD displays to be used for large-screen display and eventually replace cathode ray tubes (Cathode Ray Tube, CRT). Such as improving viewing angle characteristics, increasing response speed, increasing contrast, increasing transmittance, etc. The relatively narrow viewing angle of the LCD means that when viewed away from the direction perpendicular to the normal line of the liquid...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/46G02F1/1343G02F1/137
CPCC09K19/44C09K19/46G02F1/134363G02F1/137
Inventor 姚利芳魏科金睿
Owner JIANGSU HECHENG DISPLAY TECHCO
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