Liquid crystal composition and liquid crystal display device using the same

1. A liquid crystal composition comprising at least one compound represented by Formula (i) and at least one compound represented by General Formula (ii)

(where R i1 represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms);

at least one compound represented by General Formula (II-2)

(where R 23 represents an alkenyl group having 2 to 5 carbon atoms, and R 24 represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms);

at least one compound represented by General Formula (I-1-1)

where R 12 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms;

at least one compound represented by General Formula (VIII-1)

where R 8 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms;

at least one compound represented by General Formula (IX-1-1)

where R 9 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and

at least one compound represented by General Formula (XIV-2),

wherein R 140 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms; X 141 to X 144 each independently represent a fluorine atom or a hydrogen atom; and Y 14 represents a fluorine atom, a chlorine atom, or —OCF 3 ,

wherein the at least one compound represented by General Formula (XIV-2) comprises at least one compound selected from the group consisting of a compound represented by General Formula (XIV-2-2) and a compound represented by General Formula (XIV-2-4),

wherein the amount of the at least one compound represented by General Formula (II-2) is in the range of 20 to 35 mass % relative to the total mass of the liquid crystal composition.

2. The liquid crystal composition according to claim 1 , further comprising at least one compound represented by General Formula (L)

[Chem. 6]

R L1 —B L1 -L L1 -B L2 L L2 -B L3 OL R L2   (L)

(where R L1 and R L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one —CH 2 — moiety or at least two —CH 2 — moieties not adjoining each other in the alkyl group are each independently optionally substituted with —C≡C—, —O—, —CO—, —COO—, or —OCO—;

OL represents 0, 1, 2, or 3;

B L1 , B L2 , and B L3 each independently represent a group selected from the group consisting of

(a) a 1,4-cyclohexylene group (of which one —CH 2 — moiety or at least two —CH 2 — moieties not adjoining each other are optionally substituted with —O—) and

(b) a 1,4-phenylene group (of which one —CH═ moiety or at least two —CH═ moieties not adjoining each other are optionally substituted with —N═), and

the groups (a) and (b) are each independently optionally substituted with a cyano group, a fluorine atom, or a chlorine atom;

L L1 and L L2 each independently represent a single bond, —CH 2 CH 2 —, —(CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —COO—, —OCO, —OCF 2 —, —CF 2 O—, —CH═N—N═CH—, —CH═CH—, —CF═CF—, or —C≡C—;

in the case where OL is 2 or 3 and where L L2 is multiple, the L L2 moieties are the same as or different from each other; in the case where OL is 2 or 3 and where B L3 is multiple, the B L3 moieties are the same as or different from each other; and the compound represented by General Formula (L) excludes the compound represented by Formula (ii)).

3. The liquid crystal composition according to claim 1 , further comprising at least one compound represented by General Formula (M)

(where R M1 represents an alkyl group having 1 to 8 carbon atoms, and one —CH 2 — moiety or at least two —CH 2 — moieties not adjoining each other in the alkyl group are each independently optionally substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO—, or —OCO—;

PM represents 0, 2, 3, or 4;

C M1 and C M2 each independently represent a group selected from the group consisting of

(d) a 1,4-cyclohexylene group (of which one —CH 2 — moiety or at least two —CH 2 — moieties not adjoining each other are optionally substituted with —O— or —S—) and

(e) a 1,4-phenylene group (of which one —CH═ moiety or at least two —CH═ moieties not adjoining each other are optionally substituted with —N═), and

the groups (d) and (e) are each independently optionally substituted with a cyano group, a fluorine atom, or a chlorine atom;

K M1 and K M2 each independently represent a single bond, —CH 2 CH 2 —, —(CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O—, —COO—, —OCO—, or —C≡C—;

in the case where PM is 2, 3, or 4 and where K M1 is multiple, the K M1 moieties are the same as or different from each other; in the case where PM is 2, 3, or 4 and where C M2 is multiple, the C M2 moieties are the same as or different from each other;

X M1 and X M3 each independently represent a hydrogen atom, a chlorine atom, or a fluorine atom;

X M2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group; and the compound represented by General Formula (M) excludes the compound represented by General Formula (i)).

4. An active-matrix liquid crystal display device comprising the liquid crystal composition according to claim 1 .

5. The active-matrix liquid crystal display device according to claim 4 , wherein the active-matrix liquid crystal display device is operated in an IPS mode.

6. The active-matrix liquid crystal display device according to claim 4 , wherein the active-matrix liquid crystal display device is operated in an FFS mode.

7. The active-matrix liquid crystal display device according to claim 4 , wherein the active-matrix liquid crystal display device is operated in a VA-IPS mode.

8. The active-matrix liquid crystal display device according to claim 4 , wherein the active-matrix liquid crystal display device is operated in an OCB mode.

9. The active-matrix liquid crystal display device according to claim 4 , wherein the active-matrix liquid crystal display device is operated in an ECB mode.

10. A liquid crystal display comprising the active-matrix liquid crystal display device according to claim 4 .