Liquid crystal composition

Patent metadata

Field	Value
Publication number	US-9920249-B2
Application number	US-201314057843-A
Country	US
Kind code	B2
Filing date	Oct 18, 2013
Priority date	Apr 21, 2011
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

A liquid crystal composition, a liquid crystal film and a display device are provided. The liquid crystal composition can be uniformly aligned with no problems such as dewetting in an operation of aligning horizontally alignable liquid crystals. Also, a state of the aligned liquid crystal compound can be stably maintained.

First claim

What is claimed is:

1. A liquid crystal film comprising a liquid crystal layer including a liquid crystal composition, the liquid crystal composition comprising:
a horizontally alignable liquid crystal compound; and
an amine compound represented by Formula 3:

wherein the amine compound is a compound in which, in Formula 3, each of L1 and L2 is a single bond, R16 and R17 are each independently an alkyl group having 1 to 12 carbon atoms, or
the amine compound is a compound in which, in Formula 3, each of R16 and R17 is -L3-Si(R18) n (OR19) 3-n , and L1 and L2 are each independently a single bond or an alkylene group having 1 to 12 carbon atoms, with the proviso that L3 is an alkylene group having 1 to 12 carbon atoms, and R18 and R19 are each independently an alkyl group having 1 to 12 carbon atoms and n is an integer ranging from 0 to 2, or
the amine compound is a compound in which, in Formula 3, R16 is an alkyl group having 1 to 12 carbon atoms, each of L1 and L2 is a single bond, and R17 is -L3-Si(R18) n (OR19) 3-n , wherein L3 is an alkylene group having 1 to 12 carbon atoms, and R18 and R19 are each independently an alkyl group having 1 to 12 carbon atoms and n is an integer ranging from 0 to 2,
wherein an optical axis of the liquid crystal layer comprising the liquid crystal compound has an inclination angle of 0° to 25° with respect to a plane of the liquid crystal layer,
wherein the liquid crystal film satisfies the requirements of General Formula 1:
X<8%  [General Formula 1]

wherein X represents a percentage (%) of the absolute value of a variation in phase difference value of the liquid crystal layer formed of the liquid crystal composition after the liquid crystal layer is kept at 80° C. for 100 hours, based on an initial phase difference value of the liquid crystal layer, and
wherein X is calculated by the formula, 100×(|R o −R 1 |)/R o , wherein R o is the initial phase difference value of the liquid crystal layer, and R 1 represents a phase difference value of the liquid crystal layer after the liquid crystal layer is kept at 80° C. for 100 hours.

2. The liquid crystal film of claim 1 , wherein the horizontally alignable liquid crystal compound comprises a multifunctional polymerizable liquid crystal compound and a monofunctional polymerizable liquid crystal compound.

3. The liquid crystal film of claim 2 , wherein the monofunctional polymerizable liquid crystal compound is comprised at a content of greater than 0 parts by weight and not more than 100 parts by weight, based on 100 parts by weight of the multifunctional polymerizable liquid crystal compound.

4. The liquid crystal film of claim 1 , wherein the horizontally alignable liquid crystal compound is represented by Formula 1:

wherein A is a single bond, —COO— or —OCO—, and R 1 to R 10 are each independently hydrogen, a halogen, an alkyl group, an alkoxy group, an alkoxycarbonyl group, a cyano group, a nitro group, —O-Q-P or a substituent of Formula 2, or a pair of two adjacent substituents of R 1 to R 5 or a pair of two adjacent substituents of R 6 to R 10 are joined together to form a benzene ring substituted with —O-Q-P, with the proviso that at least one of the substituents R 1 to R 10 is —O-Q-P or the substituent of Formula 2, or at least one of the pair of two adjacent substituents of R 1 to R 5 and the pair of two adjacent substituents of R 6 to R 10 are joined together to form a benzene ring substituted with —O-Q-P, wherein Q is an alkylene group or an alkylidene group, and P is an alkenyl group, an epoxy group, a cyano group, a carboxyl group, an acryloyl group, a methacryloyl group, an acryloyloxy group or a methacryloyloxy group:

wherein B is a single bond, —COO— or —OCO—, and R 11 to R 15 are each independently hydrogen, a halogen, an alkyl group, an alkoxy group, an alkoxycarbonyl group, a cyano group, a nitro group or —O-Q-P, or a pair of two substituents of R 11 to R 15 are joined together to form a benzene ring substituted with —O-Q-P, with the proviso that at least one of the substituents R 11 to R 15 is —O-Q-P, or two adjacent substituents of R 11 to R 15 are joined together to form a benzene ring substituted with —O-Q-P, wherein Q is an alkylene group or an alkylidene group, and P is an alkenyl group, an epoxy group, a cyano group, a carboxyl group, an acryloyl group, a methacryloyl group, an acryloyloxy group or a methacryloyloxy group, and
wherein the symbol

means that a portion of the symbol is connected to a mother compound.

5. The liquid crystal film of claim 1 , wherein the liquid crystal composition further comprises a photopolymerization initiator.

6. The liquid crystal film of claim 1 , which further comprises a substrate layer and wherein the liquid crystal layer is formed on one surface of the substrate layer.

7. The liquid crystal film of claim 6 , wherein the substrate layer is an optically isotropic substrate layer, an optically anisotropic substrate layer or a polarizing element.

8. A display device comprising the liquid crystal film according to claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Lee Dae Hee
• Kim Sin Young
• Lee Da Mi
• Park Moon Soo

Classifications

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• B32B2457/202

  LCD, i.e. liquid crystal displays · CPC title

• C09K2019/0448

  the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate · CPC title

• B32B2457/204

  Plasma displays · CPC title

• C09K19/56

  Aligning agents · CPC title