Display device

Abstract

According to one embodiment, a display device includes a first substrate including a first resin substrate having a first thermal expansion coefficient, and a first barrier layer having a second thermal expansion coefficient which is lower than the first thermal expansion coefficient, a second substrate including a second resin substrate having a third thermal expansion coefficient which is equal to the first thermal expansion coefficient, and a second barrier layer having a fourth thermal expansion coefficient which is lower than the third thermal expansion coefficient and is equal to the first thermal expansion coefficient, and a display element located between the first resin substrate and the second resin substrate.

What is claimed is: 
     
         1 . A display device comprising:
 a first substrate including a first resin substrate having a first thermal expansion coefficient, a first barrier layer which covers an inner surface of the first resin substrate and has a second thermal expansion coefficient which is lower than the first thermal expansion coefficient, and a switching element formed above the first barrier layer;   a second substrate including a second resin substrate which is formed of a material different from a material of the first resin substrate and has a third thermal expansion coefficient which is equal to the first thermal expansion coefficient, a second barrier layer which covers an inner surface of the second resin substrate and has a fourth thermal expansion coefficient which is lower than the third thermal expansion coefficient and is equal to the first thermal expansion coefficient; and   a display element located between the first resin substrate and the second resin substrate and including a pixel electrode which is electrically connected to the switching element.   
     
     
         2 . The display device of  claim 1 , wherein a thickness of the first resin substrate and a thickness of the second resin substrate are equal. 
     
     
         3 . The display device of  claim 1 , wherein the display element is an organic electroluminescence element, and
 the display device further comprises a sealing film covering the display element.   
     
     
         4 . The display device of  claim 1 , wherein the display element is a liquid crystal element. 
     
     
         5 . The display device of  claim 1 , wherein a difference between the first thermal expansion coefficient and the second thermal expansion coefficient is equal to a difference between the third thermal expansion coefficient and the fourth thermal expansion coefficient. 
     
     
         6 . The display device of  claim 1 , wherein each of the first thermal expansion coefficient and the third thermal expansion coefficient is 20 to 50 ppm/° C. 
     
     
         7 . The display device of  claim 1 , wherein each of the second thermal expansion coefficient and the fourth thermal expansion coefficient is 0.5 to 3.0 ppm/° C. 
     
     
         8 . The display device of  claim 1 , wherein each of the first resin substrate and the second resin substrate is formed of a material including polyimide as a main component. 
     
     
         9 . The display device of  claim 1 , wherein each of the first barrier layer and the second barrier layer is formed of an inorganic material including silicon as a main component.