Liquid crystal composition and liquid crystal display element using same

1. A liquid crystal composition comprising:

a component A including a liquid crystal compound having a positive dielectric anisotropy; and

a component B including a compound represented by General Formula (i) and a compound represented by General Formula (N),

the total amount of the compound represented by General Formula (i) being 10% by mass or greater,

the total amount of the compound represented by General Formula (N) being 12% by mass to 45% by mass:

wherein R i1 and R i2 each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms, provided that at least one of R i1 or R i2 is the alkenyl group,

wherein ring A each independently represents a group selected from the group consisting of:

(a) a 1,4-cyclohexylene group (one —CH 2 — or at least two non-adjacent —CH 2 —'s present in the group may be substituted with —O—),

(b) a 1,4-phenylene group (one —CH═ or at least two non-adjacent —CH═'s present in the group may be substituted with —N═), and

the groups (a) and (b) each may be independently substituted with a fluorine atom,

R N1 represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms,

R N2 represents methyl group, and

s represents an integer of 1 to 3.

2. The liquid crystal composition according to claim 1 ,

which has a K avg of 12.0 pN or more, wherein the K avg is a mean value of elastic constants K 11 , K 22 , and K 33 .

3. The liquid crystal composition according to claim 1 , further comprising:

at least one liquid crystal compound having a dielectric anisotropy of −2 to +2, which is represented by General Formula (L) as the component B:

wherein R L1 and R L2 each independently represents an alkyl group having 1 to 8 carbon atoms, and one —CH 2 — or at least two non-adjacent —CH 2 —'s present in the alkyl group may be independently 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 represents a group selected from the group consisting of:

(a) a 1,4-cyclohexylene group (one —CH 2 — or at least two non-adjacent —CH 2 —'s present in the group may be substituted with —O—),

(b) a 1,4-phenylene group (one —CH═ or at least two non-adjacent —CH═'s present in the group may be substituted with —N═), and

the above groups (a) and (b) each may be independently substituted with a cyano group, a fluorine atom, or a chlorine atom;

L L1 and L L2 each independently represents 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

in the case where OL is 2 or 3 and plural L L2 's are present, plural L L2 's may be the same as or different from each other, and in the case where OL is 2 or 3 and plural B L3 's are present, plural B L3 's may be the same as or different from each other.

4. The liquid crystal composition according to claim 1 , further comprising:

at least one liquid crystal compound having a dielectric anisotropy of +3 to +40, which is represented by General Formula (M) as the component A including the liquid crystal compound having a positive dielectric anisotropy:

wherein R M1 represents an alkyl group having 1 to 8 carbon atoms, and one —CH 2 — or at least two non-adjacent —CH 2 —'s present in the alkyl group may be independently 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 represents a group selected from the group consisting of:

(d) a 1,4-cyclohexylene group (one —CH 2 — or at least two non-adjacent —CH 2 —'s present in the group may be substituted with —O— or —S—),

(e) a 1,4-phenylene group (one —CH═ or at least two non-adjacent —CH═'s present in the group may be substituted with —N═), and

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

K M1 and K M2 each independently represents 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 plural K M1 's are present, plural K M1 's may be the same as or different from each other, and in the case where PM is 2, 3 or 4 and plural C M2 's are present, plural C M2 's may be the same as or different from each other;

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

X M2 represents 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.

5. A liquid crystal display element using the liquid crystal composition according to claim 1 .

6. A liquid crystal display element for an IPS mode, an OCB mode, an ECB mode, a VA mode, or an FFS mode, the element using the liquid crystal composition according to claim 1 .

7. A liquid crystal display using the liquid crystal display element according to claim 5 .

8. The liquid crystal composition according to claim 2 , which has the K avg of 12.0 pN to 20 pN.

9. The liquid crystal composition according to claim 2 , wherein the K avg is the mean value of elastic constants K 11 , K 22 , and K 33 at 25° C.