# US 2008/0186443 A1 · Liquid Crystal Composition, Retardation Plate, and Elliptic Polarizing Plate

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- Number: US 2008/0186443 A1
- Document ID: US20080186443A1
- Status: Published application
- Kind: A1
- Application number: 11/817,696
- Filed: 2006-03-03
- Published: 2008-08-07
- Earliest claimed: 2005-03-04
- Assignees: FUJIFILM Corporation
- Inventors: Hideyuki Nishikawa
- Web page: https://patentgrep.com/patent/US20080186443A1

## CPC

- G02B 5/3016: {involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528)}
- C09K 2323/00: Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A liquid crystal composition is provided and includes: at least one kind of liquid crystal R exhibiting a liquid crystal phase having a positive birefringence property; and at least one kind of liquid crystal D exhibiting a liquid crystal phase having a negative birefringence property. The characteristic birefringence Δn (λ) at wavelength λ of the liquid crystal phase exhibited by the liquid crystal R satisfies the equation (II): Δn (450 nm)/Δn (550 nm)<1.0.

## Claims

### Claim 1

A liquid crystal composition comprising:
a liquid crystal R exhibiting a liquid crystal phase having a positive birefringence property; and
a liquid crystal D exhibiting a liquid crystal phase having a negative birefringence property,
wherein the liquid crystal phase exhibited by the liquid crystal R has a characteristic birefringence Δn (λ) at wavelength λ, the characteristic birefringence Δn (λ) satisfying equation (II):
Δn(450 nm)/Δn(550 nm)<1.0.

### Claim 2 (depends on 1)

The liquid crystal composition according to claim 1, wherein the liquid crystal R comprises a compound represented by formula (GI):
wherein MG101 and MG102 each independently represents a liquid crystal core part containing 2 to 8 cyclic groups for inducing an exhibition of the liquid crystal phase of the liquid crystal R, and each ring of the 2 to 8 cyclic groups in the liquid crystal core part is an aromatic ring, an aliphatic ring or a heterocyclic ring;
one cyclic group of the 2 to 8 cyclic groups in MG101 is substituted with L101, and one cyclic group of the 2 to 8 cyclic groups in MG102 is substituted with L102;
R101 and R102 each independently represents a flexible substituent, a dipole-acting group, or a hydrogen-bonding group, which are substituted in a molecular long axis direction of the liquid crystal core MG101 and induce an exhibition of the liquid crystal phase of the liquid crystal R, and R103 and R104 each independently represents a flexible substituent, a dipole-acting group, or a hydrogen-bonding group, which are substituted in a molecular long axis direction of the liquid crystal core MG102 and induce an exhibition of the liquid crystal phase of the liquid crystal R; and
L101 represents a linking group substituted on the liquid crystal core part MG101, L102 represents a linking group substituted on the liquid crystal core part MG102, and L101 and L102 each independently is a group represented by one of formulae (GI)-LA and (GI)-LB:
wherein * represents a position of substitution on the cyclic group MG101 or MG102;
# represents the position to be linked to a substituent P;
A1, A3 and A4 each independently represents —O—, —NH—, —S—, —CH2—, —CO—, —SO— or —SO2—;
A2 represents —CH═ or —N═;
in the case where L101 and L102 each is a group represented by formula (GI)-LA, the substituent P represents a single bond, or a divalent linking group selected from the group consisting of —CH═CH—, —C≡C—, 1,4-phenylene, and a combination thereof;
in the case where one of L101 and L102 is a group represented by formula (GI)-LB, the substituent P is represented by *═CH—P1-# or *═N—P1-#, wherein * represents a linking position with the group represented by (GI)-LB, # represents a linking position with the group represented by (GI)-LA, and P1 represents a single bond, or a divalent linking group selected from the group consisting of —CH═CH—, —C≡C—, 1,4-phenylene, and a combination thereof; and
in the case where L101 and L102 each is a group represented by formula (GI)-LB, the substituent P represents a double bond, ═CH—P1—CH═, ═N—P1—CH═, or ═N—P1—N═.

### Claim 3 (depends on 1)

The liquid crystal composition according to claim 1, wherein the liquid crystal R comprises a compound represented by formula (GII):
wherein A11 and A14 each independently represents —O—, —NH—, —S—, —CH2—, —CO—, —SO— or —SO2—;
A12 and A13 each independently represents —CH═ or —N═;
P11 represents a single bond, or a divalent linking group selected from the group consisting of —CH═CH—, —C≡C—, 1,4-phenylene, and a combination thereof; and
R111, R112, R113 and R114 each independently is represented by formula (GIV):
*-L121-divalent cyclic group-L122-divalent chain group-Q21
wherein * represents a position bonding to the benzene ring in formula (GII);
L121 represents a single bond or a divalent linking group;
L122 represents a single bond or a divalent linking group;
the divalent cyclic group represents a divalent linking group having at least one cyclic structure;
the divalent chain group represents an alkylene group, a substituted alkylene group, an alkenylene group, a substituted alkenylene group, an alkynylene group, or a substituted alkynylene group; and
Q21 represents a polymerizable group or a hydrogen atom.

### Claim 4 (depends on 1)

The liquid crystal composition according to claim 1, wherein the liquid crystal D comprises a compound represented by formula (D-2):
wherein Y11, Y12 and Y13 each independently represents methine or a nitrogen atom; H1, H2 and H3 each independently represents a divalent 5-membered cyclic group; L1, L2 and L3 each independently represents a single bond or a divalent linking group; and R1, R2 and R3 each independently represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or unsubstituted amino group, an alkoxyl group, an aryloxy group, an acyl group, an alkoxycarbonyl group, an aryloxy-carbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a sulfamoyl group, a carbamoyl group, an alkylthio group, an arylthio group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a ureido group, a phosphoric acid amido group, a hydroxyl group, a mercapto group, a halogen atom, a cyano group, a sulfo group, a carboxyl group, a nitro group, a hydroxamic acid group, a sulfino group, a hydrazino group, an imino group, a heterocyclic group, or a silyl group.

### Claim 5 (depends on 1)

A retardation plate comprising: a transparent support; and an optical anisotropic layer, wherein the optical anisotropic layer is a layer formed from the liquid crystal composition according to claim 1.

### Claim 6

A retardation plate comprising an optical anisotropic layer formed from a liquid crystal composition, wherein the optical anisotropic layer is biaxial and has a retardation satisfying equation (III):
Re(450 nm)/Re(550 nm)<1.0
wherein Re (λ) is a retardation value in a plane of the optical anisotropic layer at a wavelength λ.

### Claim 7 (depends on 5)

An elliptic polarizing plate comprising: a retardation plate according to claim 5; and a polarizing film.

### Claim 8 (depends on 6)

An elliptic polarizing plate comprising: a retardation plate according to claim 6; and a polarizing film.