Polarizing plate having specified ratio of triiodide ions to iodine to pentaiodide ions and organic light-emitting display device having the same
Provided are a very highly transmissive polarizing plate which allows for improved luminance efficiency without reducing the degree of polarization by enhancing the color of the polarizing plate, and an organic light-emitting display device having the same. With this very highly transmissive polarizing plate, the brightness, lifetime, and efficiency of the organic light-emitting display device can be improved, and at the same time power consumption can be reduced.
1. A polarizing plate having a transmittance of 46% or higher, comprising:
a plurality of triiodide ions (I 3 − ), iodine (I 2 ), and pentaiodide ions (I 5 − ),
wherein a ratio of the triiodide ions to the iodine to the pentaiodide ions ((I 3 ):(I 2 ):(I 5 − )) is 15:40:45 to 19:40:41.
2. The polarizing plate of claim 1 , wherein chromaticity coordinates a*/b* have values of −0.5/1.5 to 0.0/0.0.
3. The polarizing plate of claim 1 , further comprising a dye in the iodine at a rate of 1.7% or more.
4. The polarizing plate of claim 3 , wherein the dye includes a black dye, having three or more dyes of CMY (or RGB) colors.
5. The polarizing plate of claim 1 , further comprising additives in the iodine at a rate of 3.5% or more.
6. The polarizing plate of claim 5 , wherein the additives comprise a metal compound.
7. The polarizing plate of claim 6 , wherein the metal compound comprises one of a zinc (Zn) compound, a chlorine (Cl) compound, and a platinum (Pt) compound.
8. The polarizing plate of claim 7 , wherein the metal compound comprises a zinc (Zn) compound, and wherein the zinc compound comprises one of zinc chloride, zinc iodide, zinc sulfate, zinc nitride, and zinc acetate.
9. The polarizing plate of claim 1 having a transmittance of 48% or higher.
10. An optical member for an organic light-emitting display device having a transmittance of 46% or higher, comprising:
a substrate;
a polarizing plate disposed over the substrate and having comprising a plurality of triiodide ions (I 3 − ), iodine (I 2 ), and pentaiodide ions (I 5 − ),
wherein a ratio of the triiodide ions to the iodine to the pentaiodide ions ((I 3 ):(I 2 ):(I 5 − )) is 15:40:45 to 19:40:41; and
a phase difference layer on the polarizing plate.
11. The optical member of claim 10 , wherein the phase difference layer comprises a quarter-wave plate (QWP) inducing a λ/4 phase retardation.
12. The optical member of claim 10 , wherein chromaticity coordinates a*/b* have values of −0.5/1.5 to 0.0/0.0.
13. The optical member of claim 10 , further comprising a dye in the iodine at a rate of 1.7% or more.
14. The optical member of claim 13 , wherein the dye includes a black dye having three or more dyes of CMY (or RGB) colors.
15. The optical member of claim 10 , further comprising additives in the iodine at a rate of 3.5% or more.
16. The optical member of claim 15 , wherein the additives comprise a metal compound.
17. The optical member of claim 16 , wherein the metal compound comprises one of a zinc (Zn) compound, a chlorine (Cl) compound, and a platinum (Pt) compound.
18. The polarizing plate of claim 17 , wherein the metal compound comprises a zinc (Zn) compound, and wherein the zinc compound comprises one of zinc chloride, zinc iodide, zinc sulfate, zinc nitride, and zinc acetate.
19. The optical member of claim 10 , further comprising a surface treatment layer between the polarizing plate and the substrate.
20. The optical member of claim 10 having a transmittance of 48% or higher.