Window and electronic device including the same
A window includes a first glass substrate, a second glass substrate facing the first glass substrate, and a bonding layer disposed between the first glass substrate and the second glass substrate. The window includes a first non-folding portion, a second non-folding portion, and a folding portion, the folding portion is disposed between the first non-folding portion and the second non-folding portion, and at least one of the first glass substrate and the second glass substrate includes a concave portion corresponding to the folding portion and defined on a surface adjacent to the bonding layer.
1 . A window for an electronic device comprising:
a first window glass substrate;
a second window glass substrate facing the first window glass substrate; and
a bonding layer between the first window glass substrate and the second window glass substrate and bonding the first window glass substrate and the second window glass substrate, wherein
the window includes a first non-folding portion, a second non-folding portion, and a folding portion,
the folding portion is between the first non-folding portion and the second non-folding portion, and
at least one of the first window glass substrate and the second window glass substrate includes a concave portion corresponding to the folding portion and defined on a surface adjacent to the bonding layer,
wherein a pencil hardness of the bonding layer is greater than or equal to approximately 6 H.
2 . The window of claim 1 , wherein the first window glass substrate and the second window glass substrate are each a tempered window glass substrate.
3 . The window of claim 1 , wherein
the concave portion is defined on a surface of the first window glass substrate adjacent to the bonding layer, and
a surface of the second window glass substrate adjacent to the bonding layer is a flat surface.
4 . The window of claim 3 , wherein the first window glass substrate comprises:
a first portion corresponding to the folding portion;
a second portion corresponding to the first non-folding portion and the second non-folding portion; and
a third portion between the first portion and the second portion, and having a thickness in a thickness direction of the first window glass substrate increasing in a direction from the first portion to the second portion, wherein
an average thickness of the first portion in the thickness direction is in a range of approximately 20 μm to approximately 100 μm, and
an average thickness of the second portion in the thickness direction is in a range of approximately 50 μm to approximately 300 μm.
5 . The window of claim 4 , wherein a surface of the third portion adjacent to the bonding layer has an inclination angle of less than or equal to approximately 45 degrees with respect to a surface of the second portion.
6 . The window of claim 4 , wherein a length of a surface of the third portion adjacent to the bonding layer in a cross-sectional view is in a range of approximately 10 mm to approximately 80 mm.
7 . The window of claim 3 , wherein an average thickness of the second window glass substrate in a thickness direction of the second window glass substrate is in a range of approximately 30 μm to approximately 50 μm.
8 . The window of claim 1 , wherein an average thickness of the bonding layer in a thickness direction of the first window glass substrate is in a range of approximately 10 μm to approximately 100 μm.
9 . The window of claim 1 , wherein
a first concave portion is defined on a surface of the first window glass substrate adjacent to the bonding layer, and
a second concave portion overlapping the first concave portion in a thickness direction of the first window glass substrate is defined on a surface of the second window glass substrate adjacent to the bonding layer.
10 . The window of claim 1 , wherein
a width of the folding portion is a distance between the first non-folding portion and the second non-folding portion, and
the width of the folding portion is in a range of approximately 20 mm to approximately 100 mm.
11 . The window of claim 1 , wherein the bonding layer comprises a first surface facing the first window glass substrate and a second surface facing the second window glass substrate,
wherein the first surface of the bonding layer comprises a first convex surface protruding in a first direction and in the folding portion, and
wherein the second surface of the bonding layer comprises a second convex surface protruding in a second direction opposite to the first direction and in the folding portion.
12 . A window for an electronic device comprising:
a first window glass substrate comprising:
a first portion;
a second portion thicker than the first portion; and
a third portion between the first portion and the second portion and having a thickness in a thickness direction of the first window glass substrate increasing in a direction from the first portion to the second portion;
a second window glass substrate facing the first window glass substrate; and
a bonding layer filling a space between the first window glass substrate and the second window glass substrate and bonding the first window glass substrate and the second window glass substrate, wherein
the window includes a folding portion foldable with respect to a folding axis extending in a direction, and a first non-folding portion and a second non-folding portion spaced apart from each other,
the folding portion is between the first non-folding portion and the second non-folding portion,
the first portion corresponds to the folding portion, and
the second portion corresponds to the first non-folding portion and the second non-folding portion,
wherein a pencil hardness of the bonding layer is greater than or equal to approximately 6 H.
13 . The window of claim 12 , wherein
a concave portion recessed in a direction from a surface to another surface facing the surface of the first window glass substrate is defined on the surface of the first window glass substrate adjacent to the bonding layer by the first portion and the third portion, and
a surface of the second window glass substrate adjacent to the bonding layer is a flat surface.
14 . The window of claim 13 , wherein
an average thickness of the first portion in a thickness direction of the first window glass substrate is in a range of approximately 20 μm to approximately 100 μm,
an average thickness of the second portion in the thickness direction is in a range of approximately 50 μm to approximately 300 μm, and
an average thickness of the second window glass substrate in the thickness direction is in a range of approximately 30 μm to approximately 50 μm.
15 . The window of claim 13 , wherein a surface of the third portion adjacent to the bonding layer has an inclination angle of less than or equal to approximately 45 degrees with respect to a surface of the second portion.
16 . The window of claim 12 , wherein
the second window glass substrate comprises:
a fourth portion corresponding to the folding portion;
a fifth portion corresponding to the first non-folding portion and the second non- folding portion, and thicker than the fourth portion; and
a sixth portion having a thickness in a thickness direction of the second window glass substrate increasing in a direction from the fourth portion to the fifth portion, and
a concave portion recessed in a direction from a surface to another surface facing the surface of the second window glass substrate is defined on the surface of the second window glass substrate adjacent to the bonding layer by the fourth portion and the sixth portion.
17 . An electronic device comprising:
a display module including a folding display portion foldable with respect to a folding axis extending in a direction, and a first non-folding display portion and a second non-folding display portion spaced apart from each other with the folding display portion interposed between the first non-folding display portion and the second non-folding display portion; and
a window on the display module, and including a folding portion corresponding to the folding display portion, and a first non-folding portion and a second non-folding portion respectively corresponding to the first non-folding display portion and the second non-folding display portion, wherein
the window comprises:
a first window glass substrate;
a second window glass substrate facing the first window glass substrate; and
a bonding layer disposed between the first window glass substrate and the second window glass substrate and bonding the first window glass substrate and the second window glass substrate, and
at least one of the first window glass substrate and the second window glass substrate includes a concave portion corresponding to the folding portion and defined on a surface adjacent to the bonding layer,
wherein a pencil hardness of the bonding layer is greater than or equal to approximately 6 H.
18 . The electronic device of claim 17 , wherein
the at least one of the first window glass substrate and the second window glass substrate including the concave portion comprises:
a first portion corresponding to the folding portion;
a second portion corresponding to the first non-folding portion and the second non- folding portion; and
a third portion between the first portion and the second portion, and having a thickness in a thickness direction of the first window glass substrate increasing in a direction from the first portion to the second portion,
an average thickness of the first portion in a thickness direction of the first window glass substrate is in a range of approximately 20 μm to approximately 100 μm, and
an average thickness of the second portion in the thickness direction is in a range of approximately 50 μm to approximately 300 μm.
19 . The electronic device of claim 18 , wherein a surface of the third portion adjacent to the bonding layer has an inclination angle of less than or equal to approximately 45 degrees with respect to a surface of the second portion.
20 . The electronic device of claim 18 , wherein a length of a surface of the third portion adjacent to the bonding layer in a cross-sectional view is in a range of approximately 10 mm to approximately 80 mm.
21 . The electronic device of claim 17 , wherein
the concave portion is defined on one of a surface of the first window glass substrate and a surface of the second window glass substrate which are adjacent to the bonding layer, and
another one of the surface of the first window glass substrate and the surface of the second window glass substrate is a flat surface.
22 . The electronic device of claim 21 , wherein an average thickness of one of the first window glass substrate and the second window glass substrate having the flat surface is in a range of approximately 30 μm to approximately 50 μm.
23 . The electronic device of claim 17 , wherein an average thickness of the bonding layer is in a range of approximately 10 μm to approximately 100 μm.
24 . The electronic device of claim 17 , wherein
a width of the folding portion is a distance between the first non-folding portion and the second non-folding portion, and
the width of the folding portion is in a range of approximately 20 mm to approximately 100 mm.
25 . The electronic device of claim 17 , wherein
a first concave portion is defined on a surface of the first window glass substrate adjacent to the bonding layer, and
a second concave portion overlapping the first concave portion in a thickness direction of the first window glass substrate is defined on a surface of the second window glass substrate adjacent to the bonding layer.
26 . The electronic device of claim 17 , wherein
in a folded state, a distance between upper surfaces of the window facing each other is less than a distance between upper surfaces of the display module facing each other,
the second window glass substrate is more adjacent to the display module than the first window glass substrate,
the concave portion is defined on a surface of the first window glass substrate adjacent to the bonding layer, and a surface of the second window glass substrate adjacent to the bonding layer is a flat surface.
27 . The electronic device of claim 17 , wherein
in a folded state, a distance between upper surfaces of the display module facing each other is less than a distance between upper surfaces of the window facing each other,
the second window glass substrate is more adjacent to the display module than the first window glass substrate,
the concave portion is defined on a surface of the second window glass substrate adjacent to the bonding layer, and
a surface of the first window glass substrate adjacent to the bonding layer is a flat surface.