Liquid crystal composition and liquid crystal display device thereof
A technology for liquid crystal compositions and compounds, applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of speeding up the response speed, the liquid crystal display cannot display normally, and the clearing point is reduced, etc.
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- Publication Date
- 2016-05-18
Smart Images
Figure 1 
Figure 2 
Figure 3
Abstract
Description
technical field
[0001] The present invention relates to a liquid crystal composition, in particular to a liquid crystal composition with suitable optical anisotropy, suitable dielectric anisotropy, higher clearing point, faster response speed and good low-temperature storage stability, And a liquid crystal display device comprising the liquid crystal composition. Background technique
[0002] Liquid crystal material is a mixture of organic rod-shaped small molecular compounds that have both fluidity of liquid and anisotropy of crystal at a certain temperature. Liquid crystal display elements work by utilizing the optical anisotropy and dielectric anisotropy of the liquid crystal material itself, and have been widely used at present. Utilizing the different characteristics and working modes of liquid crystal materials, the device can be designed into various working modes. Among them, the TN mode (twisted nematic mode, the liquid crystal mixture has a nematic structure with ...
Examples
preparation example
[0151] The compound of general formula Ⅰ-2 is obtained by the method of suzuki coupling using commercially available raw materials, and the synthetic route is as follows:
[0152]
[0153] Among them, R 2 represents an alkyl group having 1 to 5 carbon atoms. Both Compound A and Compound B are commercially available.
[0154] Prepare the compound of following structural formula by above-mentioned method:
[0155] When R 2 =C 2 h 5 When, obtain the compound of following structural formula by above-mentioned method:
[0156]
[0157] When R 2 =C 3 h 7 When, obtain the compound of following structural formula by above-mentioned method:
[0158]
[0159] When R 2 =C 4 h 9 When, obtain the compound of following structural formula by above-mentioned method:
[0160]
[0161] When R 2 =C 5 h 11 When, obtain the compound of following structural formula by above-mentioned method:
[0162]
[0163] Table 2 Compound Liquid Crystal Performance Parameters
...
Embodiment 1
[0171] The liquid crystal composition of Example 1 was formulated according to the compounds and weight percentages listed in Table 4, and it was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:
[0172] Table 4 liquid crystal composition formula and test performance thereof
[0173]
[0174] From the above Example 1 and Comparative Example 1, it can be seen that when the optical anisotropy, dielectric anisotropy and flow viscosity are similar, the liquid crystal composition of the present invention has a shorter response time and better low-temperature storage stability .
Embodiment 2
[0180] The liquid crystal composition of Example 2 was prepared by each compound listed in Table 6 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:
[0181] Table 6 liquid crystal composition formula and test performance thereof
[0182]
[0183] From the above Example 2 and Comparative Example 2, it can be seen that the liquid crystal composition of the present invention has a shorter response and better low-temperature storage when the optical anisotropy, dielectric anisotropy, clearing point and flow viscosity are similar. stability.