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Liquid crystal composition with low refractive index

A technology of liquid crystal composition and refractive index, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems that cannot satisfy the transflective liquid crystal display mode, etc.

Active Publication Date: 2013-11-20
JIANGSU HECHENG DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the optical birefringence of the liquid crystal composition is generally ≥0.0800, which cannot meet the needs of the transflective liquid crystal display mode

Method used

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  • Liquid crystal composition with low refractive index
  • Liquid crystal composition with low refractive index
  • Liquid crystal composition with low refractive index

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Each compound listed in Table 3-1 and parts by weight are prepared into the liquid crystal composition of the present invention, which is filled between the two substrates of the liquid crystal display for performance testing, and the test data are shown in Table 3-2.

[0065] Table 3-1

[0066] Liquid crystal compound (indicated by code) parts by weight 2AANF 12 3AANF 10 5AANF 6 2AAMF 6.5 4AA3 8.5 3AAO1 9 2AAKONF 9.5 3AAKONF 6 4AAKONF 4 3A2AMF 6.5 5A2AMF 6.5 3A2ANF 6 4A2ANF 6.5 3AA1OA5 3

[0067] Table 3-2

[0068] Test items data TN I(°C) 80 Δn(589nm, 20℃) 0.0661 ne (589nm, 20°C) 1.5377 no(589nm, 20℃) 1.4716 Viscosity (mm 2 ·s -1 , 20℃) 20.3 Δε(1KHz, 25℃) +5.6

Embodiment 2

[0070] The compounds and parts by weight listed in Table 4-1 were prepared into the liquid crystal composition of the present invention, filled between the two substrates of the liquid crystal display for performance testing, and the test data are shown in Table 4-2.

[0071] Table 4-1

[0072] Liquid crystal compound (indicated by code) parts by weight 4AMF 5 2AANF 12 3AANF 10 5AANF 6 4AA3 5.5 5AA3 6 3AAO1 9 2AAKONF 9.5 3AAKONF 6 4AAKONF 4

[0073] 5AAV 5 3A2ANF 6 4A2ANF 6.5 3AA1OA5 9.5

[0074] Table 4-2

[0075] Test items data TN I(°C) 75 Δn(589nm, 20℃) 0.0601 ne (589nm, 20°C) 1.5315 no(589nm, 20℃) 1.4714 Viscosity (mm 2 ·s -1 , 20℃) 19.1 Δε(1KHz, 25℃) +4.78

Embodiment 3

[0077] The compounds and parts by weight listed in Table 5-1 were prepared into the liquid crystal composition of the present invention, filled between the two substrates of the liquid crystal display for performance testing, and the test data are shown in Table 5-2.

[0078] Table 5-1

[0079] Liquid crystal compound (indicated by code) parts by weight 4AMF 5 2AANF 12 3AANF 10 5AANF 6 4AA3 5.5 5AA3 6 3AAO1 9 2AAKONF 9.5 3AAKONF 6 4AAKONF 4 5AAV 5 3A2ANF 6 4A2ANF 6.5 4AA1OA3 4 3AA1OA5 5.5

[0080] Table 5-2

[0081] Test items data TN I(°C) 74 Δn(589nm, 20℃) 0.0601 ne (589nm, 20°C) 1.5309 no(589nm, 20℃) 1.4708 Viscosity (mm 2 ·s -1 , 20℃) 19.4 Δε(1KHz, 25℃) +4.92

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Abstract

The invention relates to a liquid crystal composition with a low refractive index. The composition is optimally combined by three crystal compounds, and the double refraction at a temperature below 20 DEG is less than 0.0750. At the same time, the liquid crystal composition has the advantages of wide nematic range, high resistivity and good UV performance, and is suitable for semi-transmission semi-reflection liquid crystal display devices. The liquid crystal composition can well meet the display requirements of the semi-transmission semi-reflection liquid crystal display devices.

Description

technical field [0001] The present invention relates to a liquid crystal composition used in a liquid crystal display device, in particular to a liquid crystal composition with an extremely low refractive index. Background technique [0002] Liquid crystal compound is a liquid crystal phase between solid phase and liquid phase. Its phase state can be roughly divided into nematic phase, smectic phase and cholesteric phase. In display elements, the application of nematic phase is the most Widely used. The inherent optical (refractive index) anisotropy (Δn) and dielectric anisotropy (Δε) characteristics of liquid crystal compounds have been used to produce a large number of liquid crystal display elements, represented by clocks and watches, widely used in electronic computers, various Measuring instruments, automobile dashboards, electronic notebooks, mobile phones, computers, televisions, etc., and the demand is also increasing year by year. In liquid crystal display mode, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/30
Inventor 吴凤朱霞谭玉东张宏伟靳灿辉韩文明于一飞阮群奇孙仲猛
Owner JIANGSU HECHENG DISPLAY TECH CO LTD