Liquid crystal composition and application thereof

A technology for liquid crystal compositions and compounds, applied in liquid crystal materials, chemical instruments and methods, etc., can solve problems such as poor compatibility and solid precipitation, and achieve the effects of low liquid crystal conductance, low rotational viscosity, and improved liquid crystal reliability.

Active Publication Date: 2021-05-21
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hindered amine compounds, as UV absorbers for liquid crystals, have good physical and chemical stability and excellent UV resistance. However, when known hindered amine compounds are miscible with liquid crystal materials, their compatibility will deteriorate. problem, especially when applied to a lower temperature environment, solid precipitation often occurs

Method used

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  • Liquid crystal composition and application thereof
  • Liquid crystal composition and application thereof
  • Liquid crystal composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6 and comparative example 1

[0116] By adding different contents of GUEST-1 (belonging to general formula I-2) in the following table 4-1 to HOST-1: Constituting Comparative Example 1 and Examples 1-6 of the present invention, the performance test results are shown in Table 4-2.

[0117] Table 4-1 Embodiment 1-6, the formula of comparative example 1 liquid crystal composition

[0118]

[0119] Table 4-2 Performance test data of the liquid crystal composition of Examples 1-6 and Comparative Example 1

[0120]

[0121] From the data in Table 4-2, it can be seen that the low-temperature storage time of the liquid crystal composition containing the compound of the general formula I of the present invention has not been shortened, and even extended, the initial VHR- is higher, and the conductance is lower. It can be seen from this , the liquid crystal composition of the present invention has better low temperature stability and reliability.

[0122] figure 1 It is the RDC diagram of the liquid crysta...

Embodiment 7-10 and comparative example 2

[0124] By adding different contents of GUEST-2 (belonging to general formula I-9) in the following table 5-1 to HOST-2: Constitute Comparative Example 2 and Examples 7-10 of the present invention, and the performance test results are shown in Table 5-2.

[0125] Table 5-1 Embodiment 7-10, the formula of comparative example 2 liquid crystal composition

[0126] Example 7 Example 8 Example 9 Example 10 Comparative example 2 GUEST-2 content (ppm) 100 200 500 1000 0

[0127] Table 5-2 Performance test data of the liquid crystal composition of Examples 7-10 and Comparative Example 2

[0128]

[0129]

[0130] From the data in Table 5-2, it can be seen that the low-temperature storage time of the liquid crystal composition containing the compound of the general formula I of the present invention has not been shortened, and even has been extended, and the initial VHR- is higher, and the conductance is lower. It can be seen from this , the li...

Embodiment 11-14 and comparative example 3

[0133] By adding GUEST-3 (belonging to general formula I-2) with different contents in the following table 6-1 to HOST-3: Constitute Comparative Example 3 and Examples 11-14 of the present invention, and the performance test results are shown in Table 6-2.

[0134] Table 6-1 Embodiment 11-14, the formula of comparative example 3 liquid crystal composition

[0135]

[0136]

[0137] Table 6-2 Performance test data of the liquid crystal composition of Examples 11-14 and Comparative Example 3

[0138]

[0139] From the data in Table 6-2, it can be seen that the low-temperature storage time of the liquid crystal composition containing the compound of the general formula I of the present invention has not been shortened, and even extended, VHR- is initially higher, and the conductance is lower. It can be seen from this , the liquid crystal composition of the present invention has better low temperature stability and reliability.

[0140] image 3 It is the RDC diagram ...

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Abstract

The invention relates to a liquid crystal composition and application thereof. The liquid crystal composition comprises at least one compound as shown in a general formula I and at least one compound as shown in a general formula II, according to the liquid crystal composition, the additive shown in the general formula I is added into the liquid crystal composition, and the additive and the dibenzo compound shown in the general formula II are matched with each other, so that the obtained liquid crystal composition has good optical anisotropy and dielectric anisotropy, relatively high clearing point and relatively low rotational viscosity, and in addition the liquid crystal composition can maintain low-temperature intersolubility (even better), has high voltage holding ratio, low liquid crystal conductivity, fast ion dissipation speed, obviously improved liquid crystal reliability and obviously improved ghost shadow on the basis, is a liquid crystal material with high reliability and good stability, and is suitable for various liquid crystal display modes.

Description

technical field [0001] The invention relates to the technical field of liquid crystal materials, in particular to a liquid crystal composition and its application. Background technique [0002] In recent years, liquid crystal displays have been widely used in televisions, mobile phones, digital cameras, computers, personal digital assistants and other electronic products, mainly due to their advantages of high image quality, power saving, thin body and wide application range. As people's requirements for liquid crystal flat panel displays are getting higher and higher, higher requirements are also put forward for the quality and characteristics of liquid crystal materials used in liquid crystal flat panel displays. [0003] Liquid crystal materials are mainly used as dielectrics in liquid crystal display devices, and the optical properties of such substances can be changed by applying voltage. Therefore, liquid crystal materials must have good chemical stability, thermal st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/46
CPCC09K19/44C09K19/46
Inventor 陈昭远周振婷姚莉芳
Owner JIANGSU HECHENG DISPLAY TECHCO
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