Patent ID: 9081145
Filing Date: 2015-07-14
Classification: G02B

Abstract:
1. A polarizing plate, comprising: a polarizer; a first protective film attached to one side of the polarizer; and a second protective film attached to another side of the polarizer, wherein: a ratio t2/t1 or t1/t2 between coefficients t1 and t2 of thermal expansion of the first protective film and the second protective film ranges from about 0.5 to about 2, where t1 is a coefficient of thermal expansion of the first protective film and t2 is a coefficient of thermal expansion of the second protective film as measured in a transverse direction (TD) at a temperature from about 25° C. to about 120° C., and wherein a ratio m2/m1 or m1/m2 between coefficients m1 and m2 of thermal expansion of the first protective film and the second protective film ranges from about 0.5 to about 2, where m1 is a coefficient of thermal expansion of the first protective film and m2 is a coefficient of thermal expansion of the second protective film as measured in a machine direction (MD) at a temperature from about 25° C. to about 120° C.