公开(公告)号：US20140071379A1

公开(公告)日：2014-03-13

申请号：US14081747

申请日：2013-11-15

Applicant: KONICA MINOLTA, INC.

Inventor： Naoki TAKAHASHI ,  Takashi TAKEBE ,  Satoshi MORII ,  Kazuki AKASAKA ,  Nobuo KUBO

IPC: G02F1/1335 ,  G02B5/30

CPC classification number: G02F1/13362 ,  G02B1/105 ,  G02B1/14 ,  G02B5/3033 ,  G02B5/3083 ,  G02F1/133528 ,  G02F1/134363 ,  G02F2413/11

Abstract: The purpose of the present invention is to provide a polarizing plate protective film and liquid crystal display device comprising same whereby the generation of egg-shaped blur in a liquid crystal display device (especially an IPS liquid crystal display device) can still be limited even under high-temperature/high-humidity conditions. For this polarizing plate protective film, if nx is the refractive index in the X-axis direction at which the birefringence in the film surface reaches a maximum and ny is the refractive index in the Y-axis direction orthogonal to the X-axis direction in the film surface, then the birefringence under stress (nx−ny) of the film as measured at a wavelength of 589 nm when any tensile stress 5-35 MPa is applied in the X-axis direction or Y-axis direction of the film under 50 DEG C, 80% RH conditions is 0.

Abstract translation: 本发明的目的是提供一种偏振片保护膜和包括其的液晶显示装置，由此液晶显示装置（特别是IPS液晶显示装置）中的蛋形模糊的产生仍然可以受到限制 高温/高湿度条件。 对于该偏振片保护膜，如果nx是膜表面双折射达到最大值的X轴方向的折射率，ny是与X轴方向正交的Y轴方向的折射率， 膜表面，然后在589nm的波长下测量的膜的应力（nx-ny）处的双折射，当在膜的X轴方向或Y轴方向上施加5-35MPa的拉伸应力时， 50℃，80％RH条件为0。