Optical laminate, organic el display device, and foldable device
Provided is an organic EL display device including an optical laminate, and a foldable device formed of the organic EL display device. The optical laminate includes a glass plate, a first pressure-sensitive adhesive layer, a polarizer layer, a second pressure-sensitive adhesive layer, and an optically anisotropic layer in this order, in which the glass plate has a thickness of less than 100 μm, the polarizing layer is formed of a composition for forming a polarizing layer which contains a liquid crystal compound and an organic dichroic material, a distance A between the first pressure-sensitive adhesive layer and the polarizer layer is 10 μm or less, and a distance B between the polarizer layer and the second pressure-sensitive adhesive layer is 10 μm or less.
1. An optical laminate comprising:
a glass plate;
a first pressure-sensitive adhesive layer;
a polarizer layer;
a second pressure-sensitive adhesive layer; and
an optically anisotropic layer in this order,
wherein:
the glass plate has a thickness of less than 100 μm,
the first pressure-sensitive adhesive layer has a thickness of 100 μm or more,
the polarizer layer is a polarizer layer formed of a composition for forming a polarizer layer which contains a liquid crystal compound and an organic dichroic material,
a distance A between the first pressure-sensitive adhesive layer and the polarizer layer is 10 μm or less,
a distance B between the polarizer layer and the second pressure-sensitive adhesive layer is 10 μm or less,
in a case where two or more pressure-sensitive adhesive layers are provided between the glass plate and the polarizer layer, the first pressure-sensitive adhesive layer denotes a pressure-sensitive adhesive layer closest to the polarizer layer among the two or more pressure-sensitive adhesive layers provided between the glass plate and the polarizer layer, and
in a case where two or more pressure-sensitive adhesive layers are provided between the polarizer layer and the optically anisotropic layer, the second pressure-sensitive adhesive layer denotes a pressure-sensitive adhesive layer closest to the polarizer layer among the two or more pressure-sensitive adhesive layers provided between the polarizer layer and the optically anisotropic layer.
2. The optical laminate according to claim 1 ,
wherein the second pressure-sensitive adhesive layer is an adhesive layer.
3. The optical laminate according to claim 2 ,
wherein the adhesive layer is an adhesive layer formed of a PVA-based adhesive or a UV adhesive.
4. The optical laminate according to claim 1 ,
wherein a functional layer is provided in at least one of between the first pressure-sensitive adhesive layer and the polarizer layer or between the polarizer layer and the second pressure-sensitive adhesive layer.
5. The optical laminate according to claim 1 ,
wherein the polarizer layer has a thickness of 10 μm or less.
6. The optical laminate according to claim 1 ,
wherein the optically anisotropic layer is formed by being coated with a liquid crystal composition.
7. The optical laminate according to claim 1 ,
wherein the first pressure-sensitive adhesive layer has an absorbance of 0.5 or greater at a wavelength of 360 nm and a wavelength of 400 nm.
8. The optical laminate according to claim 1 , further comprising:
a UV absorbing layer having an absorbance of 0.5 or greater at a wavelength of 360 nm and a wavelength of 400 nm on a side of the glass plate with respect to the polarizer layer.
9. An organic EL display device comprising:
the optical laminate according to claim 1 .
10. A foldable device which is formed of the organic EL display device according to claim 9 .
11. The optical laminate according to claim 1 ,
wherein the glass plate has a thickness of 80 μm or less.