POLARIZING PLATE AND OPTICAL DISPLAY APPARATUS

1 . A polarizing plate comprising:

a polarizer having a first surface and a second surface facing the first surface; and

a retardation layer stack on the first surface of the polarizer,

wherein the retardation layer stack comprises a second retardation layer, a first adhesive layer, and a first retardation layer sequentially stacked from the first surface of the polarizer,

a storage modulus of the first adhesive layer at 25° C. is 1×10 5 Pa to 1×10 6 Pa, and

the second retardation layer and the first adhesive layer satisfy Relation 1:

0.3

≤

T

⁢

2

/

T

⁢

1

≤

1.

where T1 is a thickness of the first adhesive layer in unit of μm, and

T2 is a thickness of the second retardation layer in unit of μm.

2 . The polarizing plate as claimed in claim 1 , wherein the first adhesive layer has a thickness of 13 μm or less.

3 . The polarizing plate as claimed in claim 1 , wherein the second retardation layer has a thickness of 10 μm or less.

4 . The polarizing plate as claimed in claim 1 , wherein a storage modulus of the first adhesive layer at 60° C. is 6×10 4 Pa to 8×10 5 Pa.

5 . The polarizing plate as claimed in claim 1 , wherein the first adhesive layer has a ratio of the storage modulus at 25° C. to a storage modulus at 60° C. of 1.25:1 to 1.6:1.

6 . The polarizing plate as claimed in claim 1 , wherein the first adhesive layer has a glass transition temperature of −10° C. or less.

7 . The polarizing plate as claimed in claim 1 , wherein the first adhesive layer is a pressure sensitive adhesive layer.

8 . The polarizing plate as claimed in claim 1 , wherein the first adhesive layer comprises a thermal cured product of a composition comprising a (meth)acrylic based resin and a curing agent.

9 . The polarizing plate as claimed in claim 8 , wherein

the (meth)acrylic based resin comprises a (meth)acrylic copolymer of a monomer mixture, the monomer mixture comprising a (meth)acrylic monomer comprising an alkyl group and a (meth)acrylic monomer comprising a cross-linkable functional group, and

the curing agent comprises at least one selected from among an isocyanate curing agent, a metal chelate curing agent, an aziridine curing agent, an epoxy curing agent, and a carbodiimide curing agent.

10 . The polarizing plate as claimed in claim 1 , wherein the second retardation layer is a non-liquid crystal layer.

11 . The polarizing plate as claimed in claim 10 , wherein the second retardation layer comprises at least one of a cellulose based compound or a polystyrene based compound as a main component.

12 . The polarizing plate as claimed in claim 11 , wherein each of the cellulose based compound and the polystyrene based compound comprises a halogen.

13 . The polarizing plate as claimed in claim 1 , wherein the first retardation layer is a hydrophobic non-liquid crystalline film.

14 . The polarizing plate as claimed in claim 13 , wherein the first retardation layer comprises a cyclic olefin polymer (COP) film or a cyclic olefin polymer (COC) film.

15 . The polarizing plate as claimed in claim 1 , wherein the first adhesive layer is directly on each of the first retardation layer and the second retardation layer.

16 . The polarizing plate as claimed in claim 1 , wherein the first retardation layer is a +A layer and the second retardation layer is a +C layer.

17 . The polarizing plate as claimed in claim 1 , further comprising a first protective layer on the second surface of the polarizer, and the first protective layer having a moisture permeability of 100 g/m 2 /day or less.

18 . The polarizing plate as claimed in claim 1 , further comprising a second adhesive layer between the retardation layer stack and the polarizer.

19 . The polarizing plate as claimed in claim 18 , wherein a storage modulus of the second adhesive layer at 25° C. is lower than the storage modulus of the first adhesive layer at 25° C.

20 . An optical display apparatus comprising the polarizing plate as claimed in claim 1 .