Transparent substrate for optical elements, polarizer plate for liquid crystal display device using said substrate, and organic electroluminescence element
A transparent substrate for optical elements which is capable of suppressing cracking is provided, and a transparent substrate for optical elements which is capable of extending the life of optical elements such as organic EL elements used in organic EL illumination devices or polarizer plates used in liquid crystal display devices is provided. This transparent substrate for optical elements is characterized by having an inorganic layer and a hydrophilic layer laminated sequentially on a transparent resin film. For this reason, this transparent substrate for optical elements can have excellent gas barrier properties, inhibits degeneration of optical elements due to water vapor, suppresses cracking, is transparent and flexible, is easy to handle, can be efficiently and economically manufactured, and has excellent design properties.
1. A transparent substrate for optical elements, comprising:
a transparent resin film;
an inorganic layer laminated on and directly contacting the transparent resin film;
a hydrophilic layer laminated on and directly contacting the inorganic layer; and
a hydrophobic layer laminated on and directly contacting the hydrophilic layer, wherein the hydrophobic layer has a higher hydrophobicity than the hydrophilic layer,
wherein the inorganic layer comprises a lower layer, an intermediate layer and an upper layer from a side of the resin film, and a refractive index is increased in the order of the upper layer, the lower layer and the intermediate layer, and
wherein the hydrophilic layer essentially consists of any one or two or more species selected from an acrylic resin, a polyamide resin and a polyester resin.
2. The transparent substrate for optical elements of claim 1 , wherein the hydrophobic layer comprises any one or two or more species selected from an olefin resin, an alicyclic olefin resin, an acrylic resin, and a polyester resin.
3. The transparent substrate for optical elements of claim 1 , wherein the inorganic layer has a thickness of 5-500 nm, the hydrophilic layer has a thickness of 90-1000 nm, and the hydrophobic layer has a thickness of 10-1000 nm.
4. The transparent substrate for optical elements of claim 1 , wherein the inorganic layer is formed from one or more species selected from the group consisting of silicon oxides, silicon nitrides and silicon nitride oxides.
5. The transparent substrate for optical elements of claim 1 , wherein the transparent resin film is formed from a polymer selected from the group consisting of polyethylenenaphthalate, polyethyleneterephthalate, polyethersulfone, acrylic resin and triacetyl cellulose.
6. The transparent substrate for optical elements of claim 1 , wherein the inorganic layer has a thickness of 10-400 nm.
7. The transparent substrate for optical elements of claim 1 , wherein the transparent substrate has a water vapor permeability of 10 −5 to 10 −6 g/m 2 /day.
8. The transparent substrate for optical elements of claim 1 , wherein the inorganic layer has a thickness of 5-500 nm.
9. The transparent substrate for optical elements of claim 1 , wherein the hydrophobic layer has a thickness of 10-1000 nm.
10. The transparent substrate for optical elements of claim 1 , wherein the hydrophilic layer has a thickness of 90-1000 nm.
11. The transparent substrate for optical elements of claim 1 , wherein a total thickness of the hydrophobic layer and the hydrophilic layer is 100-2000 nm.
12. The transparent substrate for optical elements of claim 1 , wherein the hydrophobic layer comprises any one or two species selected from an olefin resin and a polyester resin.
13. A polarizer plate for a liquid crystal display device, comprising the transparent substrate for optical elements according to claim 1 .
14. A liquid crystal display device, comprising the polarizer plate for a liquid crystal display device according to claim 13 .
15. An organic electroluminescence element, comprising the transparent substrate for optical elements according to claim 1 .
16. An organic electroluminescence illumination device, comprising the organic electroluminescence element according to claim 15 .