Polarizing plate and display device

1. A polarizing plate comprising:

a polarizer;

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

wherein the first retardation layer comprises a polymerized unit of a normal wavelength dispersion polymerizable liquid crystal compound and a polymerized unit of a reverse wavelength dispersion polymerizable liquid crystal compound, wherein the first retardation layer does not comprise an ultraviolet absorber, and has a transmittance of 3% or less with respect to light having a wavelength of 385 nm, and a transmittance of greater than 3% with respect to light having a wavelength of 390 nm; and

a second retardation layer positioned on a surface of the first retardation layer that is opposite to the polarizer;

wherein the reverse wavelength dispersion polymerizable liquid crystal compound is represented by Formula 1 below:

wherein in Formula 1, R 1 is a substituent of Formula 2 or 3 below, and R 2 to R 6 are each independently hydrogen, an alkyl group, an alkoxy group, a cyano group, a substituent of Formula 4 below or a substituent of Formula 5 below with the proviso that at least two of R 2 to R 6 are substituents of Formula 4 below or substituents of Formula 5 below,

-A 1 -L 1 -Cyc-A 2 -L 2 -P,  [Formula 2]

wherein, in Formula 2, A 1 and A 2 are each independently an oxygen atom or a single bond, L 1 and L 2 are each independently —C(═O)—O—, —O—C(═O)— or an alkylene group, Cyc is an arylene group or a cycloalkylene group, and P is an acryloyl group, a methacryloyl group, an acryloyloxy group or a methacryloyloxy group,

wherein, in Formula 3, L 3 and L 4 are each an alkylene group, n is a number in a range of 1 to 4, and P is an acryloyl group, a methacryloyl group, an acryloyloxy group, a methacryloyloxy group or a hydrogen atom,

-A 3 -L 5 -Cyc-A 4 -L 6 -P,  [Formula 4]

wherein in Formula 4, A 3 and A 4 are an oxygen atom, an alkylene group or a single bond, L 5 and L 6 are each independently —C(═O)—O—, —O—C(═O)— or an alkylene group, Cyc is an arylene group, and P is an acryloyl group, a methacryloyl group, an acryloyloxy group or a methacryloyloxy group,

-A 5 -L 7 -Cy 1 -A 6 -L 8 -Cy 2 -A 7 -L 9 -P,  [Formula 5]

wherein in Formula 5, A 5 , A 6 and A 7 are each independently an oxygen atom or a single bond, L 7 , L 8 and L 9 are each independently —C(═O)—O—, —O—C(═O)— or an alkylene group, Cy 1 is a cycloalkylene group, Cy 2 is an arylene group, and P is an acryloyl group, a methacryloyl group, an acryloyloxy group or a methacryloyloxy group; and

wherein the normal wavelength dispersion polymerizable liquid crystal compound is represented by Formula 6 below:

wherein in Formula 6, A is a single bond, —C(═O)O— or —OC(═O)— and R 1 to R 10 are each independently hydrogen, halogen, an alkyl group, an alkoxy group, an alkoxycarbonyl group, a cyano group, a nitro group or a substituent of Formula 7 below, or two neighboring substituents of R 1 to R 5 or two neighboring substituents of R 6 to R 10 are bonded to each other to constitute a benzene ring substituted with an -L-A-P group, wherein in the -L-A-P group, L is —C(═O)O—, —OC(═O)— or —OC(═O)O—, A is an alkylene group and P is an acryloyl group, a methacryloyl group, an acryloyloxy group or a methacryloyloxy group,

wherein in Formula 7, B is a single bond, —C(═O)O— or —OC(═O)— and R 11 to R 15 are each independently hydrogen, halogen, an alkyl group, an alkoxy group, an alkoxycarbonyl group, a cyano group, a nitro group or -L′-A′-P′, or two neighboring substituents of R 11 to R 15 are bonded to each other to constitute a benzene ring substituted with an -L′-A′-P′ group, wherein in the -L′-A′-P′ group, L′ is —C(═O)O—, —OC(═O)— or —OC(═O)O—, A′ is an alkylene group and P′ is an acryloyl group, a methacryloyl group, an acryloyloxy group or a methacryloyloxy group.

2. The polarizing plate according to claim 1 , wherein the first retardation layer has an absolute value of a retardation change ratio of 17% or less, wherein the retardation change ratio is calculated according to Equation A:

Retardation change ratio=100×( Ra−Ri )/ Ri,   [Equation A]

Wherein in Equation A, Ri is an initial in-plane retardation of the first retardation layer for light having a wavelength of 550 nm, and Ra is an in-plane retardation of the first retardation layer for light having a wavelength of 550 nm after an endurance condition, wherein the endurance condition comprises maintaining the first retardation layer at a temperature of 85° C. for 50 hours or more.

3. The polarizing plate according to claim 1 , wherein the second retardation layer is a vertically oriented liquid crystal layer having a polymerized unit of a vertically oriented polymerizable liquid crystal compound.

4. The polarizing plate according to claim 3 , wherein the vertically oriented polymerizable liquid crystal compound is a reverse wavelength dispersion polymerizable liquid crystal compound.

5. The polarizing plate according to claim 1 , further comprising an isotropic film between the polarizer and the first retardation layer.

6. The polarizing plate according to claim 1 , further comprising a cured resin layer between the polarizer and the first retardation layer.

7. The polarizing plate according to claim 1 , wherein the first retardation layer is directly attached to the polarizer.

8. The polarizing plate according to claim 1 , further comprising a pressure-sensitive adhesive layer on a surface of the second retardation layer opposite to the first retardation layer.

9. The polarizing plate according to claim 1 , further comprising a protective film on the top of the polarizer.

10. A display device comprising the polarizing plate of claim 1 .