Electro-luminescence device for improved display quality by suppressing irregularity of the gap and method of manufacturing electro-luminescence device
There is provided an electro-luminescence device in which a display base substrate including a display body layer having a switching element disposed in the shape of a matrix and a light emitting element having a light emitting state controlled by the switching element and a sealing layer having a gas barrier layer that is formed on the display body layer and has at least a function for blocking water vapor and a protection substrate made of a translucent material and having a surface on which at least two types of gap control layers made of different materials are stacked are bonded such that a gap control layer, disposed on the uppermost layer, of the gap control layers and the gas barrier layer are brought into contact with each other, wherein the gap control layer disposed on the uppermost layer has a Young's modulus lower than the gas barrier layer.
1. An electro-luminescence device comprising:
a display base substrate including
a display body layer including a switching element and a light emitting element electrically connected to the switching element, the display body layer being disposed above the display base substrate; and
a sealing layer including a gas barrier layer having at least a function for blocking water vapor, the sealing layer being disposed above the display body layer;
a protection substrate including a first gap control layer disposed above the protection substrate and a second gap control layer disposed on the first gap control layer, the first gap control layer and the second gap control layer having different Young's modulus; and
a bonding layer interposed between the second gap control layer and the gas barrier layer so as to bond the display base substrate and the protection substrate,
wherein the second gap control layer has a Young's modulus lower than those of the first gap control layer and the gas barrier layer.
2. An electro-luminescence device comprising:
a display base substrate including
a display body layer including a switching element and a light emitting element electrically connected to the switching element, the display body layer being disposed above the display base substrate; and
a sealing layer including a gas barrier layer having at least a function for blocking water vapor, the sealing layer being disposed above the display body layer;
a protection substrate including a color filter layer disposed above the protection substrate, a first gap control layer disposed above the color filter layer, and a second gap control layer disposed on the first gap control layer; and
a bonding layer interposed between the second gap control layer and the gas barrier layer so as to bond the display base substrate and the protection substrate,
wherein the Young's modulus of the second gap control layer is lower than those of the first gap control layer and the gas barrier layer.
3. The electro-luminescence device according to claim 2 , wherein the sealing layer includes at least three types of material layers including a cathode protecting layer, an organic buffer layer, and the gas barrier layer which are sequentially stacked on the display body layer.
4. The electro-luminescence device according to claim 3 , wherein the Young's modulus of the organic buffer layer is higher than that of the second gap control layer.
5. The electro-luminescence device according to claim 2 , wherein the second gap control layer is patterned and is disposed locally on the first gap control layer.
6. The electro-luminescence device according to claim 2 ,
wherein the color filter layer is formed by a color filter colored in one of three primary colors including red, green, and blue colors and a black matrix that is formed of a light shielding material and spaces the color filter apart, and
wherein at least any one between the first gap control layer and the second gap control layer is disposed only on the black matrix.
7. The electro-luminescence device according to claim 2 , wherein the second gap control layer is patterned and a shape tapered forward at 10 to 60 degrees is formed on a side portion of the second gap control layer which is formed by the patterning process.
8. The electro-luminescence device according to claim 2 , wherein concave and convex portions are formed on a surface of the second gap control layer.
9. The electro-luminescence device according to claim 2 , wherein a film thickness of the second gap control layer is smaller than that of the first gap control layer.
10. A method of manufacturing an electro-luminescence device, the method comprising bonding a first substrate having a gas barrier layer that is formed of a material having a high Young's modulus for protecting a group of elements formed on a surface of the first substrate, the gas barrier layer being disposed in an uppermost layer of the first substrate and a second substrate having a surface on which at least two gap control layers are included such that the gas barrier layer and the gap control layers are brought into contact with each other,
wherein an uppermost gap control layer of the gap control layers is formed of a material having a Young's modulus lower than a Young's modulus of the gap control layers disposed below the uppermost gap control layer and the gas barrier layer, and
wherein an unevenness of a surface of the gas barrier layer is absorbed by the uppermost gap control layer.
11. A method of manufacturing an electro-luminescence device, the method comprising bonding a display base substrate including a display body layer including a switching element and a light emitting element electrically connected to the switching element, the display body layer being disposed above the display base substrate, a sealing layer including a gas barrier layer having at least a function for blocking water vapor, the sealing layer being disposed above the display body layer, and a protection substrate including a color filter layer, a first gap control layer formed on the color filter layer, and a second gap control layer formed on the first gap control layer, and by overlapping and weighting the display base substrate and the protection substrate such that the second gap control layer and the gas barrier layer are brought into contact with each other,
wherein the second gap control layer is formed of a material having a Young's modulus lower than those of the first gap control layer and the gas barrier layer, and
wherein the second gap control layer contacts the gas barrier layer without depressing the gas barrier layer while absorbing an unevenness of a surface of the gas barrier layer and maintains a gap between the display body layer and the color filter layer to be approximately constant.
12. The method according to claim 11 , wherein the bonding of the display base substrate and the protection substrate includes relatively moving the display base substrate and the protection substrate horizontally in a state that the second gap control layer and the gas barrier layer are brought into contact with each other.
13. The electro-luminescence device according to claim 1 , wherein
the first gap control layer is made of a phenol resin, an epoxy resin, a novolak resin, a methacrylate resin or an acryl resin having the Young's modulus between 3 and 10 GPa; and
the second gap control layer made of a rubber-based resin having the Young's modulus between 1 and 3 GPa.