abstract |
When viewing an image display device through polarized sunglasses, coloring may appear on the surface of the image display device, and the present invention is made in view of the above situation. An object of the present invention is to provide a front panel for an image display device, in particular, a front panel for a flexible display capable of suppressing coloration through polarized sunglasses. The present invention provides a polyimide-based film having an in-plane retardation of 3,000 nm or more at a wavelength of 589.4 nm. |