| CPC G02B 5/3041 (2013.01) [G02B 1/11 (2013.01); G02B 1/14 (2015.01); G02F 1/133528 (2013.01); G02F 1/133531 (2021.01)] | 13 Claims |
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1. A polarizing plate comprising:
a polarizer,
a hard coating layer having a thickness of 1 μm to 10 μm, and a light-transmitting substrate,
wherein the hard coating layer and the light-transmitting substrate are positioned so as to face each other on the basis of the polarizer,
wherein a ratio of heat shrinkage force in a second direction of the light-transmitting substrate perpendicular to a first direction to a heat shrinkage force in the first direction of the light-transmitting substrate in a temperature range of 60° C. to 100° C. is 0.6 to 1.5,
wherein the hard coating layer contacts the polarizer,
the light-transmitting substrate is a polyethylene terephthalate film,
a thickness of the light-transmitting substrate is 10 to 150 μm, and
a ratio of the thickness of the hard coating layer to the thickness of the light-transmitting substrate is 0.02 to 0.25,
wherein the hard coating layer having a thickness of 1 μm to 10 μm includes: a binder resin; and organic or inorganic fine particles dispersed in the binder resin,
the organic fine particles have a particle size of 0.5 μm to 10 μm and the inorganic fine particles have a particle size of 1 nm to 500 nm, and
the binder resin contained in the hard coating layer includes a photocurable resin comprising a polyfunctional acrylate monomer group selected from the group consisting of pentaerythritol triacrylate, glycerol propoxylate triacrylate, trimethylolpropane ethoxylate triacrylate, trimethylpropyl triacrylate, and tripropylene glycol diacrylate,
wherein the heat shrinkage force is a force required to maintain 0.1% of strain at a temperature range of 60° C. to 100° C. after fixing the light transmitting substrate to maintain 0.1% of strain in a 0.01 N preload state,
wherein the polarizing plate further includes an anti-reflection film formed on one surface of the light-transmitting substrate so as to be placed an opposite side of the polarizer, and
wherein the anti-reflection film includes a hard coating layer having a thickness of 1 to 100 μm and a low reflection layer having a refractive index of 1.20 to 1.60 in a wavelength region of 380 nm to 780 nm.
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