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

Patent metadata

Field	Value
Publication number	US-10174254-B2
Application number	US-201415105807-A
Country	US
Kind code	B2
Filing date	Dec 19, 2014
Priority date	Dec 25, 2013
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

The present invention relates to a liquid crystal composition, which is a liquid crystal composition containing a compound represented by General Formula (II-1) as an anti-oxidizing agent for a liquid crystal composition containing the compound represented by General Formula (II-1) and also as a first component, and a compound represented by General Formula (K) as a second component. The compound represented by General Formula (II-1) enables obtainment of a working effect of the anti-oxidizing agent, and therefore it allows provision of a liquid crystal composition containing the anti-oxidizing agent which has improved reliability like low temperature stability, while the high dielectric anisotropy is maintained.

First claim

The invention claimed is:

1. A liquid crystal composition which comprises:
a compound represented by General Formula (II):

in General Formula (II), M represents an alkylene group having carbon atom number of 4 to 10; and,
a compound represented by General Formula (K):

in General Formula (K), R k1 's each independently represent an alkyl group having carbon atom number of 1 to 10 or an alkenyl group having carbon atom number of 2 to 10, in which one or two or more non-adjacent —CH 2 — in the group may be each independently substituted with —C≡C—, —O—, —CO—, —COO—, or —OCO—, and one or two or more non-adjacent hydrogen atoms in the group may be each independently substituted with a fluorine atom,
ring K 1 and ring K 2 each independently represent a 1,4-cyclohexylene group in which one or two or more non-adjacent —CH 2 — in the group may be substituted with —O— or —S— or a 1,4-phenylene group in which one or two or more non-adjacent —CH═ in the group may be substituted with —N═, and the hydrogen atoms in the group may be each independently substituted with a cyano group, a fluorine atom, or a chlorine atom,
ring K 0 represents a naphthalene-2,6-diyl group or a 1,4-phenylene group in which the hydrogen atoms in the group may be each independently substituted with a fluorine atom,
Z k1 represents —OCH 2 — or —OCF 2 —,
Z k2 , or Z k3 each independently represents a single bond, —CH 2 CH 2 —, —(CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O—, —CH 2 CH 2 CF 2 O—, —COO—, —OCO—, or —C≡C—,
n k1 's each independently represent 0, 1, 2, 3, or 4, with the proviso that, when n k1 is 2 or more, the rings K 2 may be the same as or different from each other, and
X k1 , X k2 , X k3 , and X k4 each independently represent a hydrogen atom or a fluorine atom, and Y k1 's each independently represent a fluorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group,
wherein the liquid crystal composition has no drop mark in a drop mark evaluation of a liquid crystal display element prepared by the liquid crystal composition by visually evaluating a drop mark appearing white on a black screen of the liquid crystal display element.

2. The liquid crystal composition according to claim 1 , wherein the compound represented by General Formula (II) is a compound represented by General Formula (II-a):

3. The liquid crystal composition according to claim 1 , further comprising a polymerizable compound.

4. A liquid crystal display element comprising a first substrate which is provided with a common electrode formed of a transparent conductive material, a second substrate which is provided with a pixel electrode formed of a transparent conductive material and a thin film transistor for controlling a pixel electrode disposed on each pixel, and a liquid crystal composition sandwiched between the first substrate and the second substrate, in which the alignment of liquid crystal molecules in the liquid crystal composition without voltage application is approximately parallel or approximately vertical to the substrate and the liquid crystal composition described in claim 1 is used as the liquid crystal composition of the element.

5. A liquid crystal display element, wherein the liquid crystal display element is produced by polymerization of a polymerizable compound contained in the liquid crystal composition of claim 1 with voltage application or without voltage application.

Assignees

• Dainippon Ink & Chemicals

Inventors

• Sudo Go
• Umezu Yasuo

Classifications

• C09K2019/122

  Ph-Ph · CPC title

• C09K2019/301

  Cy-Cy-Ph · CPC title

• C09K19/322

  Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene ring · CPC title

• C09K2019/3078

  Cy-Cy-COO-Ph-Cy · CPC title

• G02F2201/123

  pixel · CPC title