Optical laminates and image display devices

Abstract

The present invention provides an optical laminate comprising an adhesive sheet formed from a photocurable adhesive composition, which can suppress the occurrence of light loss due to localized loads. It also provides an image display device including such an optical laminate. [Solution] An optical laminate according to an embodiment of the present invention comprises a first optical member, a first adhesive sheet, a second optical member, a second adhesive sheet, and a polarizing film in this order. The first adhesive sheet is formed from a photocurable first adhesive composition. The second adhesive sheet is formed from a photocurable second adhesive composition. The sum of the thickness of the first adhesive sheet and the thickness of the second adhesive sheet is 30 μm or more.

Claims

1. The device comprises a first optical component, a first adhesive sheet, a second optical component, a second adhesive sheet, and a polarizing film in this order. The first adhesive sheet is formed from a photocurable first adhesive composition, The aforementioned second adhesive sheet is formed from a photocurable second adhesive composition, An optical laminate in which the sum of the thickness of the first adhesive sheet and the thickness of the second adhesive sheet is 30 μm or more.

2. The device comprises a first optical component, a first adhesive sheet, a second optical component, a second adhesive sheet, a third optical component, a polarizing film, a first phase difference film, and a second phase difference film in this order. The thickness of the second phase difference film is 10 μm or more. The first adhesive sheet is formed from a photocurable first adhesive composition, The aforementioned second adhesive sheet is formed from a photocurable second adhesive composition, An optical laminate in which the sum of the thickness of the first adhesive sheet and the thickness of the second adhesive sheet is 20 μm or more.

3. The optical laminate according to claim 1 or 2, wherein at least one selected from the group consisting of the thickness of the first adhesive sheet and the thickness of the second adhesive sheet is 20 μm or more.

4. The optical laminate according to claim 1 or 2, wherein the total value is less than 60 μm.

5. The polarizing film further comprises a first phase difference film and a second phase difference film located on the opposite side of the first optical member from the polarizing film, The optical laminate according to claim 1, wherein the polarizing film, the first phase difference film, and the second phase difference film are arranged in this order.

6. The optical laminate according to claim 5, wherein the thickness of the second phase difference film is 10 μm or more.

7. The first adhesive composition comprises monomer component M1, The optical laminate according to claim 1 or 2, wherein the monomer component M1 contains a nitrogen atom-containing monomer.

8. The second adhesive composition comprises monomer component M2, The optical laminate according to claim 1 or 2, wherein the monomer component M2 contains a nitrogen atom-containing monomer.

9. The optical laminate according to claim 1 or 2, wherein the first optical member has a hard coat layer.

10. The optical laminate according to claim 9, wherein the indentation modulus of the hard coat layer is 5 GPa or more.

11. An image display device comprising the optical laminate according to claim 1 or 2.

Images