Polarizing plate for antireflection and display device comprising the same

Abstract

Provided are a polarizing plate for antireflection including a polarizer, and a protective layer formed on at least one surface of the polarizer, wherein the polarizing plate has a single transmittance of 44.6% or more and a degree of polarization of 98% or more and satisfies 0≤[(orthogonal a*)2+(orthogonal b*)2]0.5≤16, and a display device including the polarizing plate. The polarizing plate for antireflection can exhibit high transmittance while preventing blue-shift phenomenon and having neutral reflection color. Further, the polarizing plate for antireflection can be made thinner.

1 . A polarizing plate for antireflection comprising a polarizer, and a protective layer formed on at least one surface of the polarizer,
 wherein the polarizing plate has a single transmittance of 44.6% or more and a degree of polarization of 98% or more and satisfies Equation 1 below:
   [(orthogonal  a *) 2 +(orthogonal  b *) 2 ] 0.5 ≤16  [Equation 1]
 
   wherein,   the orthogonal a* is an a* value of an orthogonal color of the polarizing plate in L*a*b* color system, and   the orthogonal b* is a b* value of an orthogonal color of the polarizing plate in L*a*b* color system.   
     
     
         2 . The polarizing plate for antireflection of  claim 1 , wherein the polarizer has a thickness of 8 μm or less. 
     
     
         3 . The polarizing plate for antireflection of  claim 1 , wherein the polarizer is prepared by primary drying in a range of 40° C. or more and less than 80° C. followed by secondary drying in a range of 80° C. or more and 105° C. or less. 
     
     
         4 . The polarizing plate for antireflection of  claim 1 , wherein the polarizer having the protective layer on at least one surface thereof is prepared by primary drying in a range of 40° C. or more and less than 80° C. followed by secondary drying in a range of 80° C. or more and 105° C. or less. 
     
     
         5 . The polarizing plate for antireflection of  claim 1 , further comprising a retardation layer laminated on the opposite side of the viewing side of the polarizer having the protective layer on at least one surface thereof. 
     
     
         6 . The polarizing plate for antireflection of  claim 5 , wherein the retardation layer comprises a λ/4 retardation layer. 
     
     
         7 . The polarizing plate for antireflection of  claim 6 , wherein the retardation layer is a λ/4 retardation layer; a retardation layer in which a λ/2 retardation layer and a λ/4 retardation layer are laminated sequentially from the viewing side; or a retardation layer in which a λ/4 retardation layer and a positive C plate layer are laminated sequentially from the viewing side. 
     
     
         8 . The polarizing plate for antireflection of  claim 5 , further comprising a pressure-sensitive adhesive layer laminated on the opposite side of the viewing side of the retardation layer. 
     
     
         9 . The polarizing plate for antireflection of  claim 1 , further comprising a releasable protective film laminated on the viewing side of the polarizer having the protective layer on at least one surface thereof. 
     
     
         10 . The polarizing plate for antireflection of  claim 8 , further comprising a release film laminated on the opposite side of the viewing side of the pressure-sensitive adhesive layer. 
     
     
         11 . A display device, comprising:
 the polarizing plate for antireflection of  claim 1 ; and   an OLED panel laminated on the opposite side of the viewing side of the polarizing plate for antireflection.   
     
     
         12 . A display device, comprising:
 the polarizing plate for antireflection of  claim 1 ;   an OLED panel laminated on the opposite side of the viewing side of the polarizing plate for antireflection; and   a cover window attached on the viewing side of the polarizing plate for antireflection via a transparent adhesive layer.