Display device including a bump with low water vapor transmission rate
A display device includes a first substrate, a second substrate, a display layer, a bump, and a sealing material. The second substrate is disposed over the first substrate. The display layer is disposed between the first substrate and the second substrate, and has a boundary. The bump is connected to the first substrate or the second substrate and protrudes in a direction toward the opposite second substrate or first substrate, and is disposed around the boundary. The sealing material is filled between the bump and the display layer. The water vapor transmission rate of the bump is less than the water vapor transmission rate of the sealing material.
1 . A display device, comprising:
a first substrate;
a second substrate disposed over the first substrate, wherein
the second substrate has a lateral dimension greater than the first substrate;
a display layer disposed between the first substrate and the second substrate, and the display layer having a boundary;
a bump connected to the second substrate and protruding in a direction toward the opposite second first substrate, and
the bump being disposed around the boundary and laterally spaced from the first substate in a top view of the display device;
and a sealing material filled between the bump and the display layer,
wherein a water vapor transmission rate of the bump is less than a water vapor transmission rate of the sealing material,
the sealing material is located in a space defined by the first substrate, the bump, and the second substrate, and
a maximum height of the bump, measured from the second substrate to which the bump is connected in a direction toward the first substrate, is greater than a minimum vertical distance between an inner surface of the first substrate and an inner surface of the second substrate.
2 . The display device according to claim 1 , wherein the bump is formed with a complete and unbroken annular pattern.
3 . The display device according to claim 1 , wherein the sealing material is filled between the bump and the first substrate or the second substrate.
4 . The display device according to claim 1 , wherein the bump is in a closed annular shape.
5 . The display device according to claim 1 , wherein the display layer comprises:
a first electrode disposed on the first substrate;
a second electrode disposed over the first electrode;
a display medium layer disposed between the first electrode and the second electrode; and
an optical adhesive layer disposed between the display layer and the second substrate.
6 . The display device according to claim 1 , wherein the water vapor transmission rate of the bump is 0.1 g/m2/day to 10 g/m2/day.
7 . The display device according to claim 1 , wherein the bump is integrally formed with the first substrate or the second substrate.
8 . The display device according to claim 1 , wherein the display layer has a boundary, and a distance between a sidewall of the second substrate and the boundary is greater than a distance between a sidewall of the first substrate and the boundary.
9 . The display device according to claim 1 , wherein the display layer has a boundary, the bump has a first sidewall away from the display layer, and the sealing material has a second sidewall away from the display layer, and
a distance between the first sidewall and the boundary is greater than a distance between the second sidewall and the boundary.