Nematic liquid crystal composition and liquid crystal display device using the same

1. A liquid crystal composition having positive dielectric anisotropy, comprising compounds represented by formula (26.2) and formula (2.5):

 and

one or more compounds represented by general formula (IV):

(In the formula, R 41 and R 42 each independently represent an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 or 5 carbon atoms and X 41 and X 42 each independently represent a hydrogen atom or a fluorine atom),

13% by mass or more of one or more selected from compounds represented by formula (11.1) and formula (11.2):

 and

a compound represented by general formula (V-2)

wherein R 51 and R 52 each independently represent an alkyl group having 1 to 5 carbon atoms, and X 51 and X 52 each independently represent a fluorine atom or a hydrogen atom.

2. The liquid crystal composition according to claim 1 , further comprising one or more compounds represented by general formula (L):

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

(In the formula, R L1 and R L2 each independently represent an alkyl group having 1 to 8 carbon atoms where one —CH 2 — or two or more non-adjacent —CH 2 — in the alkyl group may each independently be substituted with —CH═CH—, —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 (one —CH 2 — or two or more non-adjacent —CH 2 — in this group may each be substituted with —O—) and

(b) a 1,4-phenylene group (one —CH═ or two or more non-adjacent —CH═ in this group may each be substituted with —N═)

where the group (a) and the group (b) may each independently be 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—, and

when OL represents 2 or 3 and a plurality of L L2 are present, they may be the same or different; when OL represents 2 or 3 and a plurality of B L3 are present, they may be the same or different; however, the compounds represented by formula (2.5) and general formula (IV), general formula (V-2), and compounds represented by formula (11.1) and formula (11.2) are excluded).

3. The liquid crystal composition according to claim 1 , comprising one or more compounds represented by general formula (M):

(In the formula, R M1 represents an alkyl group having 1 to 8 carbon atoms where one —CH 2 — or two or more non-adjacent —CH 2 — in the alkyl group may each independently be substituted with —CH═CH—, —C≡C—, —O—, —CO—, —COO—, or —OCO—,

PM represents 0, 1, 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 (one —CH 2 — or two or more non-adjacent —CH 2 — in this group may each be substituted with —O— or —S—) and

(e) a 1,4-phenylene group (one —CH═ or two or more non-adjacent —CH═ in this group may each be substituted with —N═)

where the group (d) and the group (e) may each independently be 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—,

when PM represents 2, 3, or 4 and a plurality of K M1 are present, they may be the same or different; and when PM represents 2, 3, or 4 and a plurality of C M2 are present, they may be the same or different,

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

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; however, the compound represented by formula (26.2) is excluded).

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

5. A liquid crystal display using the active matrix-driving liquid crystal display device according to claim 4 .