Optical element, display device, and input device

Patent metadata

Field	Value
Publication number	US-9618657-B2
Application number	US-201214008954-A
Country	US
Kind code	B2
Filing date	Mar 30, 2012
Priority date	Mar 31, 2011
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

An optical element has a base material having a surface and a plurality of structures which are arranged on the surface of the base material at a fine pitch equal to or shorter than the wavelength of visible light and which each includes a convex or concave portion. The elastic modulus of the material forming the structures is 1 MPa or more and 1200 MPa or less, and the surface on which the structures are formed are hydrophilic.

First claim

The invention claimed is:

1. An optical element comprising:
a base material having a surface; and
a plurality of structures which are fixed on the surface of the base material at a pitch of 175 nm or more and 350 nm or less and which each comprise a convex or concave portion, wherein
a water contact angle on the surface on which the structures are formed is 110° or less,
a crosslink density of the structures is 0.8 mol/L or more and 5.1 mol/L or less,
an elastic modulus of a material forming the structures is 1 MPa or more and 1200 MPa or less, and
the surface on which the structures are formed is hydrophilic.

2. The optical element according to claim 1 , wherein a water contact angle on the surface on which the structures are formed is 30° or less.

3. The optical element according to claim 1 , wherein an aspect ratio of the structures is within a range of 0.6 or more and 5 or less.

4. The optical element according to claim 1 , wherein the structures are arranged so that a plurality of track rows are formed on the surface of the base material and form a lattice pattern.

5. The optical element according to claim 4 , wherein the lattice pattern is at least one of a hexagonal lattice pattern, a quasi-hexagonal lattice pattern, a tetragonal lattice pattern, and a quasi-tetragonal lattice pattern.

6. The optical element according to claim 4 , wherein the structures each have an elliptical cone shape or an elliptical frustum shape, which has a long axis direction along a track extending direction.

7. The optical element according to claim 4 , wherein the tracks have a linear or arc shape.

8. The optical element according to claim 4 , wherein the tracks meander.

9. The optical element according to claim 1 , wherein an average molecular weight between crosslinks of the structures is 400 or more and 10000 or less.

10. The optical element according to claim 9 , wherein the average molecular weight between crosslinks of the structures is 700 or more and 1500 or less.

11. The optical element according to claim 9 , wherein the structures contain, as a main component, at least one of an oligomer having two (meth)acryloyl groups and an oligomer having three (meth)acryloyl groups.

12. The optical element according to claim 11 , wherein the structures contain, as a main component, an oligomer having two (meth)acryloyl groups.

13. The optical element according to claim 9 , wherein the structures contain, as a main component, a linear macromolecule.

14. A display device comprising the optical element according to claim 1 .

15. An input device comprising the optical element according to claim 1 .

16. An optical element comprising:
a plurality of structures which are fixed at a pitch of 175 nm or more and 350 nm or less and which each comprise a convex portion, wherein
a water contact angle on the surface on which the structures are formed is 110° or less,
a crosslink density of the structures is 0.8 mol/L or more and 5.1 mol/L or less,
lower portions of adjacent ones of the structures are bonded to each other,
an elastic modulus of a material forming the structures is 1 MPa or more and 1200 MPa or less, and
a surface on which the structures are formed is hydrophilic.

17. An optical element comprising:
a base material having a surface; and
a plurality of structures which are arranged on the surface of the base material at a pitch of 175 nm or more and 350 nm or less and which each comprise a convex or concave portion, wherein
a water contact angle on the surface on which the structures are formed is 110° or less,
a crosslink density of the structures is 0.8 mol/L or more and 5.1 mol/L or less,
an elastic modulus of a material forming the structures is 1 MPa or more and 1200 MPa or less,
the surface on which the structures are formed is hydrophilic, and
the surface of the base material is in an x-y plane, and the convex and concave are in a z direction which is perpendicular to the x-y plane.

18. An optical element comprising:
a base material having a surface; and
a plurality of structures which are fixed on the surface of the base material at a pitch of 175 nm or more and 350 nm or less and which each comprise a convex or concave portion, wherein
a crosslink density of the structures is 0.8 mol/L or more and 5.1 mol/L or less,
an elastic modulus of a material forming the structures is 1 MPa or more and 1200 MPa or less,
the surface on which the structures are formed is hydrophilic, and
an average molecular weight between crosslinks of the structures is 400 or more and 10000 or less.

Assignees

• Fukuda Tomoo
• Lee Sung-Kil
• Arima Mitsuo
• Iida Fumihiko
• Kiso Hiroyuki
• Nomura Yu
• Dexerials Corp

Inventors

• Fukuda Tomoo
• Lee Sung-Kil
• Arima Mitsuo
• Iida Fumihiko
• Kiso Hiroyuki
• Nomura Yu

Classifications

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G02F1/133502

  Antiglare, refractive index matching layers · CPC title

• G02B27/0006

  with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B) · CPC title

• G02F2201/38

  Anti-reflection arrangements · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title