LIQUID CRYSTAL COMPOSITION AND LIQUID DISPLAY DEVICE

Abstract

The present invention provides a liquid crystal composition and a liquid crystal display device. The liquid crystal composition comprises at least one compound of general formula I, at least one compound of general formula II and at least one compound of general formula III. The liquid crystal composition provided in the present invention has an appropriate optical anisotropy, an appropriate clearing point, an appropriate absolute value of dielectric anisotropy, a larger K value, a smaller rotational viscosity, a shorter response time, a higher transmittance, a higher contrast rate and a longer low-temperature storage time, and a liquid crystal display device prepared thereby has excellent performances and is suitable for fast-response, high-contrast VA, IPS, NFFS display modes and the like.

Claims

1-10. (canceled)

11. A liquid crystal composition comprising at least one compound of general formula I-1, at least two compounds of general formula II and at least two compounds of general formula III: ##STR00108## wherein, R.sub.1 represents H, C.sub.1-12 halogenated or unhalogenated linear alkyl, C.sub.3-12 halogenated or unhalogenated branched alkyl, C.sub.1-12 halogenated or unhalogenated alkoxy, C.sub.2-12 halogenated or unhalogenated alkenyl, C.sub.2-12 halogenated or unhalogenated alkenoxy, ##STR00109## R.sub.2R.sub.5 each independently represents C.sub.1-12 linear alkyl, C.sub.3-12 branched alkyl, C.sub.1-12 alkoxy, C.sub.2-12 alkenyl, C.sub.2-12 alkenoxy, ##STR00110## one or at least two CH.sub.2 in ##STR00111## can be replaced by O, one or at least two single bond in the rings can be replaced by double bond, and one or at least two single bond in at least one ring ##STR00112## is replaced by double bond; ring ##STR00113## each independently represents ##STR00114## one or at least two H on ##STR00115## can each be independently replaced by F, Cl, CN, CH.sub.3 or OCH.sub.3, one or at least two CH in the rings can be replaced by N; L.sub.1-L.sub.6 each independently represents halogen atom; X.sub.1 and X.sub.2 each independently represents O or S; n.sub.2 represents 1 or 2, when n.sub.2 represents 2, ring ##STR00116## is the same or different; and n.sub.3 represents 0, 1, 2 or 3, n.sub.4 represents 0 or 1, and 2n.sub.3+n.sub.43; when n.sub.3 represents 2 or 3, ring ##STR00117## is the same or different; in the liquid crystal composition, percentage by weight of the compound of general formula I-1 is 0.1%-30%; in the liquid crystal composition, percentage by weight of the compound of general formula II is 0.1%-50%; in the liquid crystal composition, percentage by weight of the compound of general formula III is 0.1%-30%; the liquid crystal composition further comprises at least one compound of general formula N: ##STR00118## wherein, RN1 and RN2 each independently represents C1-12 linear alkyl, C3-12 branched alkyl, ##STR00119## wherein one or at least two nonadjacent CH.sub.2 in the C1-12 linear alkyl and C3-12 branched alkyl can each be independently replaced by CHCH, CC, O, CO, COO or OCO; ring ##STR00120## each independently represents ##STR00121## wherein one or at least two CH.sub.2 in ##STR00122## can be replaced by O; one or at least two H on ##STR00123## can each be independently replaced by F, Cl or CN, one or at least two CH in the rings can be replaced by N; Z.sub.N1 and Z.sub.N2 each independently represents single bond, COO, OCO, CH.sub.2O, OCH.sub.2, CHCH, CC, CH.sub.2CH.sub.2, CF.sub.2CF.sub.2, (CH.sub.2).sub.4, CF.sub.2O or OCF.sub.2; L.sub.N1 and L.sub.N2 each independently represents H, C.sub.1-3 alkyl, or halogen atom; n.sub.N1 represents 0, 1, 2 or 3, n.sub.N2 represents 0 or 1, and 0n.sub.N1+n.sub.N23, wherein when n.sub.N1 represents 2 or 3, ring ##STR00124## is the same or different, and Z.sub.N1 is the same or different; and substituted or unsubstituted terphenyl structure is not contained in the compound of general formula N, the substituent for substitution is selected from F, Cl or CN; in the liquid crystal composition, percentage by weight of the compound of general formula N is 0.1%-30%; the liquid crystal composition further comprises at least one compound of general formula M: ##STR00125## wherein, R.sub.M1 and R.sub.M2 each independently represents C.sub.1-12 linear alkyl, C.sub.3-12 branched alkyl, ##STR00126## wherein one or at least two nonadjacent CH.sub.2 in the C1-12 linear alkyl and C3-12 branched alkyl can each be independently replaced by CHCH, CC, O, CO, COO or OCO; ring ##STR00127## each independently represents ##STR00128## wherein one or at least two CH.sub.2 in ##STR00129## can be replaced by O, one or at least two single bond in the rings can be replaced by double bond; at most one H on ##STR00130## can be replaced by halogen atom; ZM1 and ZM2 each independently represents single bond, COO, OCO, CH.sub.2O, OCH.sub.2, CC, CHCH, CH.sub.2CH.sub.2 or (CH.sub.2).sub.4; n.sub.M represents 0, 1 or 2, wherein when ny represents 2, ring ##STR00131## is the same or different, Z.sub.M2 is the same or different; in the liquid crystal composition, percentage by weight of the compound of general formula Mis 0.1%-60%.

12. The liquid crystal composition according to claim 11, wherein L.sub.1 and L.sub.2 represent fluorine atom.

13. The liquid crystal composition according to claim 11, wherein the liquid crystal composition comprises at least two compounds of general formula I-1.

14. The liquid crystal composition according to claim 11, wherein, in the liquid crystal composition, percentage by weight of the compound of general formula I-1 is 1%-20%.

15. The liquid crystal composition according to claim 14, wherein, in the liquid crystal composition, percentage by weight of the compound of general formula I-1 is 4%-16%.

16. The liquid crystal composition according to claim 11, wherein the compound of general formula II is any one or the combination of at least two of the compounds with the following structures: ##STR00132## wherein, R.sub.2, R.sub.3, L.sub.3, and L.sub.4 have the same protection scopes as those in claim 11.

17. The liquid crystal composition according to claim 11, wherein L.sub.3 and L.sub.4 both represent fluorine atom.

18. The liquid crystal composition according to claim 11, wherein, in the liquid crystal composition, percentage by weight of the compound of general formula II is 15%-36%.

19. The liquid crystal composition according to claim 11, wherein the compound of general formula III is any one or the combination of at least two of the compounds with the following structures: ##STR00133## ##STR00134## ##STR00135## wherein, R.sub.4, R.sub.5, L.sub.5, and L.sub.6 have the same protection scopes as those in claim 11.

20. The liquid crystal composition according to claim 11, wherein L.sub.5 and L.sub.6 both represent fluorine atom.

21. The liquid crystal composition according to claim 11, wherein, in the liquid crystal composition, percentage by weight of the compound of general formula III is 3%-15%.

22. The liquid crystal composition according to claim 11, wherein the compound of general formula N is any one or the combination of at least two of the compounds with the following structures: ##STR00136## ##STR00137## wherein, R.sub.N1 and R.sub.N2 have the same protection scopes as those in claim 11.

23. The liquid crystal composition according to claim 22, wherein the compound of general formula N is any one or the combination of at least two of the compounds with the following structures: ##STR00138##

24. The liquid crystal composition according to claim 11, wherein, in the liquid crystal composition, percentage by weight of the compound of general formula N is 5%-25%.

25. The liquid crystal composition according to claim 11, wherein the compound of general formula M is any one or the combination of at least two of the compounds with the following structures: ##STR00139## ##STR00140## ##STR00141## wherein, R.sub.M1 and R.sub.M2 have the same protection scopes as those in claim 11.

26. The liquid crystal composition according to claim 25, wherein the compound of general formula M is any one or the combination of at least two of the compounds with the following structures: ##STR00142##

27. The liquid crystal composition according to claim 11, wherein, in the liquid crystal composition, percentage by weight of the compound of general formula M is 30%-50%.

28. The liquid crystal composition according to claim 11, wherein the liquid crystal composition further comprises at least one compound of general formula B: ##STR00143## wherein, R.sub.B1 and R.sub.B2 each independently represents halogen atom, C.sub.1-12 halogenated or unhalogenated linear alkyl, C.sub.3-12 halogenated or unhalogenated branched alkyl, ##STR00144## wherein one or at least two nonadjacent CH.sub.2 in the C.sub.1-12 halogenated or unhalogenated linear alkyl, C.sub.3-12 halogenated or unhalogenated branched alkyl, ##STR00145## can each independently be replaced by CHCH, CC-, CHCF, O, CO, COO or OCO; ring ##STR00146## each independently represents ##STR00147## wherein one or at least two nonadjacent CH.sub.2 in ##STR00148## can be replaced by O, one or at least two single bond in the rings can be replaced by double bond; one or at least two H on ##STR00149## can each be independently replaced by CN, F or Cl, one or at least two CH in the rings can be replaced by N; X.sub.B represents O, S or CO; L.sub.B1 and L.sub.B2 each independently represents H, F, Cl, CF.sub.3 or OCF.sub.3; Z.sub.B1 and Z.sub.B2 each independently represents single bond, COO, OCO, CH.sub.2O, OCH.sub.2, CHCH, CC, CH.sub.2CH.sub.2, CF.sub.2CF.sub.2, (CH.sub.2)n.sub.B4, (CH.sub.2)n.sub.B4O, (CH.sub.2)n.sub.B4S, CF.sub.2O or OCF.sub.2, wherein n.sub.B4 represents an integer of 0-5; n.sub.B1 and n.sub.B2 each independently represents 0, 1 or 2, wherein when nBi represents 2, ring ##STR00150## is the same or different, when n.sub.B2 represents 2, ring ##STR00151## is the same or different, Z.sub.B2 is the same or different.

29. The liquid crystal composition according to claim 28, wherein the compound of general formula B is any one or the combination of at least two of the compounds with the following structures: ##STR00152## wherein, R.sub.B1 represents C.sub.1-8 alkyl, C.sub.1-8 alkoxy, C.sub.2-8 alkenyl; XB1 represents O or CH.sub.2; R.sub.B2, X.sub.B and Z.sub.B1 have the same protection scopes as those in claim 28.

30. The liquid crystal composition according to claim 29, wherein the compound of general formula B-1 is any one or the combination of at least two of the compounds with the following structures: ##STR00153## wherein, R.sub.B2 represents C.sub.1-8 alkyl; R.sub.B1 represents C.sub.1-8 alkyl, C.sub.1-8 alkoxy or C.sub.2-8 alkenyl, X.sub.B1 represents O or CH.sub.2; n.sub.B4 represents an integer of 0-5; n.sub.B3 represents 1, 2, 3 or 4; n.sub.B5 represents 0, 1, 2, 3 or 4.

31. The liquid crystal composition according to claim 28, wherein, in the liquid crystal composition, percentage by weight of the compound of general formula B is 0.1%-20%.

32. The liquid crystal composition according to claim 31, wherein, in the liquid crystal composition, percentage by weight of the compound of general formula B is 1%-10%.

33. A liquid crystal display device, wherein the liquid crystal display device comprises the liquid crystal composition of claim 11.

Description

DETAILED EMBODIMENTS

[0137] For an easier understanding of the present invention, the present invention enumerates the Examples below. It should be clear for the person skilled in the art that, the Examples are only for helping to understand the present invention, and shall not be seen as specific limitations on the present invention.

[0138] For the convenience of the expression, in the following examples, the group structures of the liquid crystal composition are represented by the codes listed in Table 1:

TABLE-US-00001 TABLE 1 Unit structure of group Code Name of group [00095] C 1,4-cyclohexylidene [00096] P 1,4-phenylene [00097] L 1, 4-cyclohexene [00098] C(5) 1-cyclopentyl [00099] C(5,V) 1-cyclopentenyl [00100] THF tetrahydrofuran-2-yl [00101] G 3-fluoro-1,4-phenylene [00102] B(O) 4,6-difluoro-dibenzo[b,d]furan-3,7-diyl [00103] B(S) 4,6-difluoro-dibenzo[b,d]thiophene-3,7-diyl [00104] G 2-fluoro-1,4-phenylene [00105] W 2,3-difluoro-1,4-phenylene O O oxygen substituent F F fluorine substituent CHCH or CHCH.sub.2 V ethenylene or ethenyl [00106] V(2F) difluoroenyl COO E ester bridge bond CH.sub.2O 1O methyleneoxy CH.sub.2CH.sub.2 2 ethyl bridge group C.sub.2H.sub.2n + 1 or C.sub.nH.sub.2n n (n represents a positive integer of 1-12) alkyl or alkylene

[0139] In Table 1, broken lines represent the binding sites of the groups.

[0140] Take the compound with the following structural formula as an example:

##STR00107## [0141] represented by the codes listed in Table 1, this structural formula can be expressed as nCCGF, n in the code represents the number of the carbon atoms of the alkyl on the left, for example, n is 3, meaning that the alkyl is C.sub.3H.sub.7; C in the code represents cyclohexylidene, G represents 2-fluoro-1,4-phenylene, and F represents fluorine.

[0142] In the following Examples and Comparative Examples, the abbreviated codes of performance test items are shown in Table 2:

TABLE-US-00002 TABLE 2 The abbreviated codes of the performance test items Code of test items Meaning Cp clearing point (nematic-isotropy phases transition temperature, C.) n optical anisotropy (589 nm, 20 C.) dielectric anisotropy (1 KHz, 20 C.) K.sub.11 splay elastic constant K.sub.33 bend elastic constant .sub.1 rotational viscosity (20 C.)/mPa .Math. s response time (ms) T.sub.r transmittance (%) CR contrast rate LTS(40 C.) low-temperature storage stability (stored at 40 C. and the time when crystal precipitation is observed, h) [0143] wherein, n: tested using an Abbe Refractometer under a sodium lamp (589 nm) light source at 20 C.; [0144] Cp ( C.): tested by melting point apparatus quantitative method; [0145] : =//, in which, // is the dielectric constant parallel to the molecular axis, is the dielectric constant perpendicular to the molecular axis, test conditions: 20 C., 1 KHz, VA-type test cell with a cell gap of 6 m; [0146] K.sub.11, K.sub.33: K.sub.11 and K.sub.33 are obtained via testing the capacitance-voltage characteristic curves (C-V curves) of liquid crystal by LCR meter and VA test cell and calculating; test conditions: 6 m VA test cell, V=0.120 V; [0147] .sub.1: tested using a LCM-2 type liquid crystal physical property evaluation system; test conditions: 20 C., 160-240 V, the cell gap is 20 m; [0148] : tested using a DMS505 tester at 25 C.; test conditions: 20 C., V100 driving, negative IPS-type test cell with a cell gap of 3.5 m;

[0149] T.sub.r: using DMS 505 photoelectric integrated tester to test the V-T curve of dimming device, taking the maximum value of transmittance on the V-T curve as the transmittance of the liquid crystal, the test cell is of negative IPS-type, the cell gap is 3.5 m; [0150] CR: testing the transmittance of the liquid crystal cell at a 255 gray level voltage and a 0 gray level voltage separately using DMS 505 tester, that is, T.sub.r255 and T.sub.r0, and it is obtained through T.sub.r255/T.sub.r0, test conditions: 20 C., negative IPS-type test cell with a cell gap of 3.5 m; [0151] LTS: nematic phase liquid crystal medium was placed in a 6 um VA test cell, stored at a constant temperature of 40 C., the time recorded when crystal precipitation is observed.

Comparative Example 1

[0152] The present Comparative Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00003 Test result of performance Code of component Content parameters 3CWO2 (N-2) 17 n 0.108 3CLWO2 (II-3) 8 Cp 72 4CLWO2 (II-3) 8 3.5 5CLWO2 (II-3) 8 K.sub.11 14.8 3CCV (M-1) 21 K.sub.33 16.4 3CCV1 (M-1) 12 .sub.1 71 1PP2V (M-4) 8 23.6 3PPWO2 (III-1) 2 Tr 15.2 4PPWO2 (III-1) 2 CR 1310 5PPWO2 (III-1) 2 LTS(40 C.) 120 2OB(S)O1C(5) 6 4OB(S)O1C(5) 6

Comparative Example 2

[0153] The present Comparative Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00004 Test result of performance Code of component Content parameters 3CWO2 (N-2) 17 n 0.103 3CCWO2 (N-7) 8 Cp 68 4CCWO2 (N-7) 8 3.5 5CCWO2 (N-7) 8 K.sub.11 13.6 3CCV (M-1) 21 K.sub.33 14.4 3CCV1 (M-1) 12 .sub.1 66 1PP2V (M-4) 8 25.1 3PPWO2 (III-1) 2 Tr 14.1 4PPWO2 (III-1) 2 CR 1142 5PPWO2 (III-1) 2 LTS(40 C.) 168 2OB(S)O1C(5) 6 4OB(S)O1C(5) 6

Comparative Example 3

[0154] The present Comparative Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00005 Test result of performance Code of component Content parameters 3CWO2 (N-2) 17 n 0.103 3CLWO2 (II-3) 8 Cp 75 4CLWO2 (II-3) 8 3.4 5CLWO2 (II-3) 8 K.sub.11 15.1 3CCV (M-1) 21 K.sub.33 17 3CCV1 (M-1) 12 .sub.1 73 1PP2V (M-4) 8 24.1 3CPWO2 (N-16) 2 Tr 14.2 4CPWO2 (N-16) 2 CR 1195 5CPWO2 (N-16) 2 LTS(40 C.) 168 2OB(S)O1C(5) 6 4OB(S)O1C(5) 6

Example 1

[0155] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00006 Test result of performance Code of component Content parameters 3CWO2 (N-2) 17 n 0.11 3CLWO2 (II-3) 8 Cp 74 4CLWO2 (II-3) 8 3.5 5CLWO2 (II-3) 8 K.sub.11 15.6 3CCV (M-1) 21 K.sub.33 17.7 3CCV1 (M-1) 12 .sub.1 70 1PP2V (M-4) 8 23.2 3PPWO2 (III-1) 2 Tr 15.5 4PPWO2 (III-1) 2 CR 1430 5PPWO2 (III-1) 2 LTS(40 C.) 168 2OB(S)O1C(5, V) (I-1) 6 4OB(S)O1C(5, V) (I-1) 6

[0156] It can be seen from the comparison of Comparative Examples 1-3 and Example 1 that via the optimization of the structures of the compound of general formula I, the compound of general formula II and the compound of general formula III, the liquid crystal composition of the present invention has a better optical anisotropy, a higher clearing point, an appropriate absolute value of dielectric anisotropy, a larger K value (K.sub.11, K.sub.33), an appropriate rotational viscosity, a shorter response time, a higher transmittance, a better contrast rate and a comparable, even better low-temperature storage stability.

Example 2

[0157] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00007 Test result of performance Code of component Content parameters 3CWO2 (N-2) 17 n 0.099 3LCWO2 (II-2) 8 Cp 72 4LCWO2 (II-2) 8 3.6 5LCWO2 (II-2) 8 K.sub.11 15.4 3CCV (M-1) 21 K.sub.33 17.6 3CCV1 (M-1) 12 .sub.1 67 1PP2V (M-4) 8 23 3PGWO2 (III-2) 2 Tr 15.7 4PGWO2 (III-2) 2 CR 1457 5PGWO2 (III-2) 2 LTS(40 C.) 216 2OB(O)O1C(5, V) (I-1) 6 3OB(O)O1C(5, V) (I-1) 6

Example 3

[0158] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00008 Test result of performance Code of component Content parameters 3CWO2 (N-2) 17 n 0.108 3CLWO2 (II-3) 8 Cp 73 4CLWO2 (II-3) 8 3.4 5CLWO2 (II-3) 8 K.sub.11 15.2 3CCV (M-1) 21 K.sub.33 17.2 3CCV1 (M-1) 12 .sub.1 70 1PP2V (M-4) 8 23.8 3PWP2 (III-6) 2 Tr 15.3 4PWP2 (III-6) 2 CR 1414 5PWP2 (III-6) 2 LTS(40 C.) 168 2OB(S)O1C(5, V) (I-1) 6 4OB(S)O1C(5, V) (I-1) 6

Example 4

[0159] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00009 Test result performance Code of component Content parameters 3CWO2 (N-2) 9 n 0.118 3CLWO2 (II-3) 9 Cp 75 4CLWO2 (II-3) 9 3.6 5CLWO2 (II-3) 8 K.sub.11 16.3 3CCV (M-1) 33 K.sub.33 18.8 1PP2V (M-4) 8 .sub.1 72 2PPWO2 (III-1) 2 22.6 3PPWO2 (III-1) 2 Tr 16.7 4PPWO2 (III-1) 2 CR 1556 5PPWO2 (III-1) 2 LTS(40 C.) 144 2OB(S)O1C(5, V) (I-1) 8 4OB(S)O1C(5, V) (I-1) 8

Example 5

[0160] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00010 Test result of performance Code of component Content parameters 3CWO2 (N-2) 15 n 0.11 3CPWO2 (N-16) 9 Cp 75 3LCWO2 (II-2) 5 3.7 4LCWO2 (II-2) 5 K.sub.11 15.2 5LCWO2 (II-2) 5 K.sub.33 17.2 3CCV (M-1) 24 .sub.1 67 3CCV1 (M-1) 12 23.3 1PP2V (M-4) 5 Tr 15.4 3PGWO2 (III-4) 2 CR 1408 4PGWO2 (III-4) 2 LTS(40 C.) 168 5PGWO2 (III-4) 2 1OB(S)O1C(5, V) (I-1) 7 2OB(S)O1C(5, V) (I-1) 7

Example 6

[0161] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00011 Test result of performance Code of component Content parameters 3CWO2 (N-2) 11 n 0.111 2CLWO2 (II-3) 8 Cp 85 3CLWO2 (II-3) 8 3.6 4CLWO2 (II-3) 8 K.sub.11 16.3 5CLWO2 (II-3) 8 K.sub.33 18.6 3CCV (M-1) 21 .sub.1 81 3CCV1 (M-1) 12 26.5 1PP2V (M-4) 8 Tr 15.6 3PWWO2 (III-7) 2 CR 1628 4PWWO2 (III-7) 2 LTS(40 C.) 168 2OB(S)O1C(5, V) (I-1) 6 4OB(S)O1C(5, V) (I-1) 6

Example 7

[0162] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00012 Test result of performance Code of component Content parameters 3CWO2 (N-2) 19 n 0.115 3CLWO2 (II-3) 8 Cp 70 4CLWO2 (II-3) 8 3.5 5CLWO2 (II-3) 4 K.sub.11 15 3CCV (M-1) 21 K.sub.33 16.8 3CCV1 (M-1) 12 .sub.1 65 1PP2V (M-4) 8 21.3 3PWP2 (III-6) 3 Tr 15.7 4PWP2 (III-6) 2 CR 1430 3GGWO2 (III-3) 3 LTS(40 C.) 168 4GGWO2 (III-3) 2 2OB(S)O1C(5, V) (I-1) 5 4OB(S)O1C(5, V) (I-1) 5

Example 8

[0163] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00013 Test result of performance Code of component Content parameters 3C1OWO2 (N-5) 5 n 0.12 3PWO2 (N-14) 5 Cp 82 3OPWO2 (N-14) 5 3.9 3CLWO2 (II-3) 6 K.sub.11 16.1 4CLWO2 (II-3) 6 K.sub.33 17.9 5CLWO2 (II-3) 6 .sub.1 79 3CCV (M-1) 29 24.5 3CCV1 (M-1) 12 Tr 15.7 1PGP2V (M-15) 2 CR 1383 2GGWO2 (III-5) 4 LTS(40 C.) 120 3GGWO2 (III-5) 4 4GGWO2 (III-5) 4 2OB(O)O1C(5, V) (I-1) 6 3OB(O)O1C(5, V) (I-1) 6

Example 9

[0164] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00014 Test result of performance Code of component Content parameters 3CWO2 (N-2) 5 n 0.112 3LWO2 (II-1) 5 Cp 83 3OGWO2 (N-27) 6 3.9 3CLWO2 (II-3) 4 K.sub.11 15.1 4CLWO2 (II-3) 4 K.sub.33 17.7 5CLWO2 (II-3) 4 .sub.1 77 3CC1OWO2 (N-10) 6 24.3 4CC1OWO2 (N-10) 6 Tr 15.5 3CCV (M-1) 26 CR 1390 5CCV1 (M-1) 8 LTS(40 C.) 168 1PP2V1 (M-4) 4 3CPP2V1 (M-13) 4 3PWPO2 (III-6) 2 4PWPO2 (III-6) 2 5PWPO2 (III-6) 2 1OB(S)O1C(5, V) (I-1) 6 2OB(S)O1C(5, V) (I-1) 6

Example 10

[0165] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00015 Test result of performance Code of component Content parameters 3CWO2 (N-2) 17 n 0.118 3CLWO2 (II-3) 8 Cp 84 4CLWO2 (II-3) 8 3.3 5CLWO2 (II-3) 8 K.sub.11 15.2 3CCV (M-1) 25 K.sub.33 16.9 3CCV1 (M-1) 4 .sub.1 78 V2CCP1 (M-11) 4 24.2 3CPP2V (M-13) 2 Tr 15.2 3CPP2V1 (M-13) 2 CR 1348 1PP2V (M-4) 4 LTS(40 C.) 216 3PPWO2 (III-1) 3 3PGWO2 (III-4) 3 3PGWO2 (III-2) 3 3PWP2 (III-6) 3 2OB(S)O1C(5, V) (I-1) 3 4OB(S)O1C(5, V) (I-1) 3

Example 11

[0166] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00016 Test result of performance Code of component Content parameters 3CPO2 (M-2) 5 n 0.121 3PPO2 (M-3) 5 Cp 78 3LCWO2 (II-2) 9 3.4 4LCWO2 (II-2) 9 K.sub.11 16.6 5LCWO2 (II-2) 8 K.sub.33 19.1 3CCV (M-1) 33 .sub.1 78 1PP2V (M-4) 7 23.9 V2PWPO2 (III-6) 2 Tr 16.9 1V2PWPO2 (III-6) 2 CR 1476 V2PGWO2 (III-4) 2 LTS(40 C.) 240 1V2PGWO2 (III-4) 2 2OB(S)OV(2F) (B-1-4) 4 4OB(S)OV(2F) (B-1-4) 4 2OB(S)O1C(5, V) (I-1) 4 4OB(S)O1C(5, V) (I-1) 4

Example 12

[0167] The present Example provides a liquid crystal composition comprising components in the percentages by weight as shown in the table below, and the performance tests are carried out by filling the same into the two substrates of the liquid crystal display device:

TABLE-US-00017 Test result of performance Code of component Content parameters 3LWO2 (II-1) 10 n 0.106 3OPWO2 (N-14) 6 Cp 86 3CLWO2 (II-3) 7 3.8 3LCWO2 (II-2) 7 K.sub.11 15 3CC1OWO2 (N-10) 10 K.sub.33 17.3 3CCV (M-1) 26 .sub.1 80 3CCV1 (M-1) 8 24.5 1PP2V1 (M-4) 4 Tr 15.4 3CCECC3 (M-28) 4 CR 1428 3PGWO2 (III-2) 2 LTS(40 C.) 192 4PGWO2 (III-2) 2 5PGWO2 (III-2) 2 1OB(S)O1C(5, V) (I-1) 6 2OB(S)O4O1 (B-1-2) 3 2OB(O)O1THF (B-4) 3

[0168] In conclusion, the liquid crystal composition provided by the present invention has a better optical anisotropy, a better clearing point, an appropriate absolute value of dielectric anisotropy, a larger K value (K.sub.11, K.sub.33), a smaller rotational viscosity, a shorter response time, a higher transmittance, a higher contrast rate and a longer low-temperature storage time, which makes the liquid crystal display device containing the liquid crystal composition of the present invention have a wider using temperature range, a lower threshold voltage, a better contrast rate, a faster response speed, a faster refresh speed and a higher transmittance and suitable for VA, IPS, NFFS display modes and the like.

[0169] The applicant declares that the liquid crystal composition and liquid crystal display device of the present invention is illustrated by the above Examples, but the present invention is not limited to the above Examples, that is, it does not mean that the implement of the present application must rely on the above Examples. It shall be clear to the person skilled in the art that any improvements of the present invention, equivalent replacements of the raw materials used in the present invention, the additions of any auxiliary components, the selection of specific methods or the like all fall into the protection scope and the disclosure scope of the present invention.

INDUSTRIAL APPLICABILITY

[0170] The liquid crystal composition involved in the present invention can be applied to the liquid crystal field.