POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

There is provided a polarizing plate including a first protective film, a polarizer, and a second protective film in this order, in which the first protective film is a film including a synthetic polymer, and has a thickness of 30 μm or less, an elastic modulus in the TD direction of 2 GPa to 2.5 GPa, and a humidity dimensional change rate in a TD direction of 0.1% or less, and the second protective film has an evaluation value represented by the following Equation (2) of 7.0 to 11.0:;Evaluation value=elastic modulus (GPa) of the second protective film in a TD direction/humidity dimensional change rate (%) of the second protective film in the TD direction×(thickness (μm) of the second protective film/thickness (μm) of the first protective film)2×(30/thickness (μm) of the polarizer)1/2 Equation (2).

主权项

1. A polarizing plate comprising: a first protective film, a polarizer, and a second protective film in this order,
wherein the first protective film is a film containing a synthetic polymer, and has a thickness of 30 μm or less, an elastic modulus in the a direction of 2 GPa to 2.5 GPa, and a humidity dimensional change rate in the TD direction, which is represented by Equation (1), of 0.1% or less, and the second protective film has an evaluation value represented by Equation (2) of 7.0 to 11.0:
Humidity dimensional change rate (%) in the TD direction=[(length of a film in the TD direction at 25° C. and a relative humidity of 80%)−(length of a film in the TD direction at 25° C. and a relative humidity of 10%)/(length of a film in the TD direction at 25° C. and a relative humidity of 60%)]×100  Equation (1), andEvaluation value=elastic modulus (GPa) of the second protective film in a TD direction/humidity dimensional change rate (%) of the second protective film in the TD direction×(thickness (μm) of the second protective film/thickness (μm) of the first protective film)2×(30/thickness (μm) of the polarizer)1/2  Equation (2).