US 12,393,077 B2
Optical laminate and method of producing the optical laminate
Kota Murano, Osaka (JP); and Nobuyuki Hatanaka, Niihama (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Filed by Sumitomo Chemical Company, Limited, Tokyo (JP)
Filed on Mar. 2, 2023, as Appl. No. 18/116,457.
Claims priority of application No. 2022-035431 (JP), filed on Mar. 8, 2022.
Prior Publication US 2023/0288751 A1, Sep. 14, 2023
Int. Cl. G02F 1/1335 (2006.01); G02B 5/30 (2006.01); G02F 1/13363 (2006.01); G02F 1/1337 (2006.01)
CPC G02F 1/133533 (2013.01) [G02B 5/3091 (2013.01); G02F 1/133638 (2021.01); G02F 1/133788 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An optical laminate comprising:
at least a first region and a second region having different values of visibility correction transmittance; and
a first protective layer having a thickness of 0.1 μm or more and 3 μm or less, an orientation layer, a light absorption anisotropic layer, and a second protective layer which is formed from a composition containing a vinyl alcohol-based polymer, and having a thickness of 0.1 μm or more and 3 μm or less provided in this order,
wherein the first region has a periodic structure of molecular orientation,
wherein the second region is a region in which the visibility correction transmittance is higher than that of the first region,
wherein a difference in thicknesses between the first region and the second region is 2 μm or less,
wherein a visibility correction transmittance in the first region is 35% or more,
wherein a visibility correction transmittance in the second region is 87% or more,
wherein the optical laminate does not include a base material layer on the side of the first protective layer opposite to the orientation layer, and
the light absorption anisotropic layer is a layer including a liquid crystal composition containing a dichroic dye, and includes the first region and the second region.