Display device and method of producing the same

1. A display device comprising:

a pair of insulating substrates arranged to be opposed;

a bonding layer provided on the outer surface side of one insulating substrate of said pair of insulating substrates; and

a strain suppressing plate fixed to said one insulating substrate by said bonding layer and having rigidity higher than that of said one insulating substrate to suppress a strain caused by curving said one insulating substrate.

2. The display device according to claim 1 , wherein

said strain suppressing plate has a projection part extending beyond said one insulating substrate.

3. The display device according to claim 2 , wherein

said bonding layer extends to said projection part of said strain suppressing plate to cover an end part of said one insulating substrates.

4. The display device according to claim 3 further comprising:

an external wiring connection terminal provided on the other substrate of said pair of insulating substrates so as to be opposed to said projection part of said strain suppressing plate; and

an external wiring connected to said external wiring connection terminal, wherein

a connection part of said external wiring connection terminal and said external wiring is covered with said bonding layer extending to said projection part of said strain suppressing plate.

5. The display device according to claim 3 , wherein

an end part of the other insulating substrate of said pair of insulating substrates is also covered with said bonding layer extending to said projection part of said strain suppressing plate.

6. The display device according to claim 4 , wherein

an end part of the other insulating substrate of said pair of insulating substrates is also covered with said bonding layer extending to said projection part of said strain suppressing plate.

7. The display device according to claim 1 , further comprising:

another bonding layer provided on the outer surface side of the other insulating substrate of said pair of insulating substrates; and

another strain suppressing plate fixed to said other insulating substrate by said another bonding layer on the side of said other insulating substrate and having rigidity higher than that of said other insulating substrate to suppress a strain caused by curving said other insulating substrate.

8. The display device according to claim 7 , wherein

said another strain suppressing plate on the side of said other insulating substrate has a projection part extending beyond said other insulating substrate.

9. The display device according to claim 8 , wherein

said another bonding layer on the side of said other insulating substrate extends to said projection part of said another strain suppressing plate on the side of said other insulating substrate to cover the end part of said other insulating substrate.

10. The display device according to claim 2 , further comprising:

a resin layer provided on said projection part of said strain suppressing plate to cover an end part of said one insulating substrate.

11. The display device according to claim 10 , wherein

said resin layer is formed of a material having a moisture-proof property higher than that of said bonding layer.

12. A production method of the display device, comprising the steps of:

(a) arranging an insulating substrate and a strain suppressing plate so as to be opposed to each other so that said strain suppressing plate has a projection part extending beyond said insulating substrate, and fixing them by a bonding agent, said strain suppressing plate having rigidity higher than that of said insulating substrate to suppress a curvature-caused strain of said insulating substrate; and

(b) applying a resin material onto said projection part of said strain suppressing plate so that an end part of said insulating substrate is covered with said resin material.