| abstract |
A method for improving the visibility of an image display device capable of obtaining an image display device excellent in antireflection performance and bright place contrast. An optical laminate is arranged so that a slow axis, which is a direction in which a refractive index of a light-transmitting substrate is large, and a vertical direction of a display screen of an image display device are parallel to each other, and the light-transmitting property is obtained. A primer layer is formed between the substrate and the optical functional layer, and the refractive index (np) of the primer layer is larger than the refractive index (nx) in the slow axis direction of the light transmissive substrate, When the refractive index is smaller than the refractive index (nf) of the functional layer (nx <np <nf), or the refractive index (np) of the primer layer is the refractive index (ny) in the fast axis direction of the light-transmitting substrate. Smaller than the refractive index (nf) of the optical functional layer (nf <np <ny), the primer layer has a thickness of 65 to 125 nm. . [Selection figure] None |