Image display device
View Patent ↗An image display device includes a first substrate formed of a resin material; a second substrate located to face the first substrate, the second substrate being formed of a resin material having a different property from that of the first substrate; an electro-optical layer between the first substrate and the second substrate; a plurality of pixel electrodes located between the electro-optical layer and the first substrate; a plurality of switching elements electrically connected with the plurality of pixel electrodes respectively; and a color filter included in a layer between the first substrate and the plurality of switching elements.
1. An image display device, comprising:
a first substrate formed of a resin material;
a second substrate located to face the first substrate, the second substrate being formed of a resin material having a different property from that of the first substrate;
an electro-optical layer between the first substrate and the second substrate;
a plurality of pixel electrodes located between the electro-optical layer and the first substrate;
a plurality of switching elements electrically connected with the plurality of pixel electrodes respectively; and
a color filter included in a layer between the first substrate and the plurality of switching elements.
2. The image display device according to claim 1 , wherein a side of the first substrate opposite to a side thereof facing the electro-optical layer is an image display side.
3. The image display device according to claim 2 , wherein:
the electro-optical layer is a liquid crystal layer; and
a surface of the second substrate facing the liquid crystal layer contains an alignment functional group aligning liquid crystal molecules in the liquid crystal layer.
4. The image display device according to claim 2 , wherein the second substrate has a lower thickness-direction retardation than that of the first substrate.
5. The image display device according to claim 2 , wherein the second substrate has a lower glass transition temperature than that of the first substrate.
6. The image display device according to claim 2 , wherein the second substrate has a higher transmittance for light having a wavelength of 365 nm than that of the first substrate.
7. The image display device according to claim 2 , wherein the second substrate has a higher coefficient of linear thermal expansion than that of the first substrate.
8. The image display device according to claim 2 , wherein:
the first substrate is formed of polyimide; and
the second substrate is formed of polyaramide, polystyrene or polyarylate.
9. The image display device according to claim 1 , wherein:
the electro-optical layer is a liquid crystal layer; and
a surface of the second substrate facing the liquid crystal layer contains an alignment functional group aligning liquid crystal molecules in the liquid crystal layer.
10. The image display device according to claim 1 , wherein the second substrate has a lower thickness-direction retardation than that of the first substrate.
11. The image display device according to claim 1 , wherein the second substrate has a lower glass transition temperature than that of the first substrate.
12. The image display device according to claim 1 , wherein the second substrate has a higher transmittance for light having a wavelength of 365 nm than that of the first substrate.
13. The image display device according to claim 1 , wherein the second substrate has a higher coefficient of linear thermal expansion than that of the first substrate.
14. The image display device according to claim 1 , wherein:
the first substrate is formed of polyimide; and
the second substrate is formed of polyaramide, polystyrene or polyarylate.
15. The image display device according to claim 1 , wherein the first substrate and the second substrate are formed of different types of polyimide having different properties from each other.
16. The image display device according to claim 1 , wherein the second substrate is a resin sheet.
17. The image display device according to claim 1 , wherein the first substrate is thinner than the second substrate.
18. The image display device according to claim 1 , wherein the switching elements are each a transistor including an oxide semiconductor.
19. The image display device according to claim 1 , wherein the first substrate and the second substrate are flexible.