Optical laminate, polarizing plate, method of manufacturing polarizing plate, and image display device
AssigneeFUJIFILM Corporation
InventorsHideki Kaneiwa, Makoto Kamo, Junichi Hirakata
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Abstract
An object of the invention is to provide an optical laminate which has excellent workability in the production of a polarizing plate and is capable of suppressing the occurrence of cracks in the polarizing plate, a polarizing plate, a method of manufacturing the polarizing plate using the optical laminate, and an image display device having the polarizing plate. An optical laminate according to the invention has a polarizer, an optical anisotropic layer, and a masking layer in this order, and hardness HB of the masking layer and hardness HA of a layer adjacent to the optical anisotropic layer side of the masking layer satisfy Expression (1): HA×0.5≤HB≤HA×2 (1).
Claims12
An optical laminate comprising in order:
- a polarizer;
- an optical anisotropic layer;
- and
- a masking layer,
- wherein a thickness of the optical anisotropic layer is 1.0 μm to 5 μm,
- the masking layer contains a black colorant or a white colorant, and
- hardness HB of the masking layer and hardness HA of the optical anisotropic layer which is adjacent to the masking layer satisfy Expression (1),
- HA×0.5≤HB≤HA×2 (1).
A polarizing plate comprising in order:
- a polarizer;
- an optical anisotropic layer;
- and
- a masking layer,
- wherein a thickness of the optical anisotropic layer is 1.0 μm to 5 μm,
- the masking layer is only provided in a peripheral portion of the optical anisotropic layer which is adjacent to the masking layer, and
- hardness HB of the masking layer and hardness HA of the optical anisotropic layer which is adjacent to the masking layer satisfy Expression (1),
- HA×0.5≤HB≤HA×2 (1).
Dependencies are inferred from the claim text.