abstract |
The present invention has been made in view of the fact that when the image display device is viewed through polarized sunglasses, coloration can be seen on the surface of the image display device. An object of the present invention is to provide a front plate for an image display device, particularly a front plate for a flexible display, which can suppress coloring beyond polarized sunglasses. This invention provides the polyimide-type film whose in-plane phase difference in wavelength 589.4 nm is 3,000 nm or more. |