Patent ID: 6985292

Claim:
A polarizing plate comprising: a protective film, 5 to 150 μm thick, composed of cyclic-olefin-based resin having an anchor coat agent applied at least on one of the surfaces of the resin, and wherein: the optical in-plane retardation of said protective film is 5 nm or less after said protective film is subjected to an 80° C. atmosphere for 24 hours, a polyvinyl-alcohol-based polarizing film located facing said anchor coat agent; and a polyvinyl-alcohol-containing adhesive layer adhering the anchor-coat-agent-applied surface of said protective film and said polyvinyl-alcohol-based polarizing film, wherein: the polarization efficiency of the polarizing plate after being subjected to an atmosphere of 80° C. and 90% relative humidity for 24 hours is restricted to 0.97 or more with respect to the polarization efficiency of the polarizing plate before being subjected to an atmosphere of 80° C. and 90% relative humidity for 24 hours; the amount of light leakage of the polarizing plate after being subjected to an atmosphere of 80° C. and 90% relative humidity for 24 hours is restricted to 3.0 or less with respect to the amount of light leakage of the polarizing plate before being subjected to an atmosphere of 80° C. and 90% relative humidity for 24 hours; and an absolute value for the amount of change in value “a” is restricted to 0.6 or less according to a Hunter-Lab method after the polarizing plate is subjected to an atmosphere of 80° C. and 90% relative humidity for 24 hours, and an absolute value for the amount of change in value “b” is restricted to 1.0 or less according to said Hunter-Lab method after the polarizing plate is subjected to an atmosphere of 80° C. and 90% relative humidity for 24 hours.