Liquid crystal composition and liquid crystal display including the same

Patent metadata

Field	Value
Publication number	US-2016200978-A1
Application number	US-201514867315-A
Country	US
Kind code	A1
Filing date	Sep 28, 2015
Priority date	Jan 13, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A liquid crystal composition includes a photoinitiator; an alignment aid; a neutral liquid crystal compound; and a polar liquid crystal compound, wherein the neutral liquid crystal compound includes at least one of compounds represented by Chemical Formulas N-1 to N-10 below:

First claim

What is claimed is:

1 . A liquid crystal composition comprising:
a photoinitiator; an alignment aid; a neutral liquid crystal compound; and a polar liquid crystal compound, wherein the neutral liquid crystal compound includes at least one of compounds represented by Chemical Formulas N-1 to N-10 below:

in Chemical Formulas N-1 to N-10 above, X and Y each independently includes one C1-C5 alkyl group.

2 . The liquid crystal composition of claim 1 , wherein:
the polar liquid crystal compound includes at least one of compounds represented by Chemical Formulas NP-1 to NP-7 below:

in Chemical Formulas NP-1 to NP-7 above, X and Y each independently includes one C1-C5 alkyl group.

3 . The liquid crystal composition of claim 2 , further comprising:
at least one of compounds represented by Chemical Formulas G-1 to G-10 below:

in Chemical Formulas G-1 to G-10 above, X and Y each independently includes one C1-C5 alkyl group.

4 . The liquid crystal composition of claim 3 , wherein:
the compound represented by Chemical Formula G-10 is excluded from the liquid crystal composition.

5 . The liquid crystal composition of claim 3 , wherein:
the compounds represented by Chemical Formulas G-1 and G-2 are excluded from the liquid crystal composition.

6 . The liquid crystal composition of claim 3 , further comprising:
at least one of the polar liquid crystal compounds represented by Chemical Formulas PI-1 to PI-4 below:

in Chemical Formulas PI-1 to PI-4 above, n, n1, and n2 are 1 to 3; A, A1 and A2 each independently is one of

 L1 to L8 each independently is H, F, Cl, OCF 3 , CF 3 , CH 2 F and CHF 2 ; Z, Z1, and Z2 each independently is —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 O, —OCH 2 —, —SCH 2 —, CH 2 S—, —CH 2 CH 2 —, —C 2 F 4 —, —CH 2 —CF 2 —, —CF 2 CH 2 —, —(CH 2 )z- (z is 1 to 3), —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C═C— and —CH═CHCH 2 O—, and in Chemical Formulas PI-1 to PI-4 above, R each independently includes one of hydrogen, halogen, a cyano group and a C1 to C12 alkyl group.

7 . The liquid crystal composition of claim 6 , wherein:
the polar liquid crystal compounds represented by Chemical Formulas PI-1 to PI-4 above have a dielectric anisotropy (Δ∈) of 10 to 30.

8 . The liquid crystal composition of claim 2 , wherein:
the photoinitiator is included in a content of 0.005 wt % to 0.5 wt % (based on the total weight of the liquid crystal composition).

9 . The liquid crystal composition of claim 8 , wherein:
the photoinitiator includes a light absorption wavelength range of 240 nanometer to 380 nanometer.

10 . The liquid crystal composition of claim 2 , wherein:
the alignment aid includes a polymerization group.

11 . A liquid crystal display comprising:
a first substrate; a second substrate facing the first substrate; and a liquid crystal layer positioned between the first substrate and the second substrate, wherein the liquid crystal layer includes a photoinitiator, an alignment aid, a neutral liquid crystal compound, and a polar liquid crystal compound, and the neutral liquid crystal compound includes at least one of compounds represented by Chemical Formulas N-1 to N-10 below:

in Chemical Formulas N-1 to N-10 above, X and Y each independently includes one C1-C5 alkyl group.

12 . The liquid crystal display of claim 11 , wherein:
the polar liquid crystal compound includes at least one of compounds represented by Chemical Formulas NP-1 to NP-7 below:

in Chemical Formulas NP-1 to NP-7 above, X and Y each independently includes one C1-C5 alkyl group.

13 . The liquid crystal display of claim 12 , wherein:
the liquid crystal layer further includes at least one of compounds represented by Chemical Formulas G-1 to G-10 below:

in Chemical Formulas G-1 to G-10 above, X and Y each independently includes one C1-C5 alkyl group.

14 . The liquid crystal display of claim 13 , wherein:
the compound represented by Chemical Formula G-10 is excluded from the liquid crystal layer.

15 . The liquid crystal display of claim 13 , wherein:
the compounds represented by Chemical Formulas G-1 and G-2 are excluded from the liquid crystal layer.

16 . The liquid crystal display of claim 13 , wherein:
the liquid crystal layer further includes at least one of the polar liquid crystal compounds represented by Chemical Formulas PI-1 to PI-4 below:

in Chemical Formulas PI-1 to PI-4 above, n, n1, and n2 are 1 to 3; A, A1 and A2 each independently is one of

 L1 to L8 each independently is H, F, Cl, OCF 3 , CF 3 , CH 2 F and CHF 2 ; Z, Z1, and Z2 each independently is —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 O, —OCH 2 —, —SCH 2 —, CH 2 S—, —CH 2 CH 2 —, —C 2 F 4 —, —CH 2 —CF 2 —, —CF 2 CH 2 —, —(CH 2 )z- (z is 1 to 3), —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C═C— and —CH═CHCH 2 O—, and in Chemical Formulas PI-1 to PI-4 above, R each independently includes one of hydrogen, halogen, a cyano group and a C1 to C12 alkyl group.

17 . The liquid crystal display of claim 16 , wherein:
the polar liquid crystal compounds represented by Chemical Formulas PI-1 to PI-4 above have a dielectric anisotropy (Δ∈) of 10 to 30.

18 . The liquid crystal display of claim 12 , wherein:
the photoinitiator is included in a content of 0.005 wt % to 0.5 wt % (based on the total weight of the liquid crystal layer).

19 . The liquid crystal display of claim 18 , wherein:
the photoinitiator includes a light absorption wavelength range of 240 nanometer to 380 nanometer.

20 . The liquid crystal display of claim 12 , wherein:
the alignment aid includes a polymerization group.

Assignees

• Samsung Display Co Ltd

Inventors

• Bae Ji Hong
• Oh Keun Chan

Classifications

• C09K19/56 Primary

  Aligning agents · CPC title

• G02F2001/13712

  Physics · mapped topic

• C09K19/3402 Primary

  having oxygen as hetero atom (sugars C09K19/0422) · CPC title

• C09K2019/3422

  the heterocyclic ring being a six-membered ring · CPC title

• G02F1/133711

  by organic films, e.g. polymeric films · CPC title