Window member, display device, and method of manufacturing display device
Provided are a window member, a display device and a method of manufacturing display device. The window member includes a first surface, and a second surface opposite to the first surface, and defining a groove at the first surface that is recessed toward the second surface, and that has a rounded end portion, wherein a thickness of the window member at a portion at which the groove is formed is less than a depth of the groove.
1 . A window member comprising a first surface, and a second surface opposite to the first surface, and defining first and second grooves at the first surface that are recessed toward the second surface, that have a rounded end portion, and that have a width in a row direction,
wherein a thickness of the window member at a portion at which one of the first and second grooves is formed is less than a depth of the one of the first and second grooves,
wherein the width of the one of the first and second grooves decreases, then increases, then decreases again from the second surface toward the first surface,
wherein the first grooves extend lengthwise in a column direction such that the first grooves are aligned and separated from each other in the column direction to be in a first column having a width in the row direction that is equal to the width of the first grooves in the row direction,
wherein the second grooves extend lengthwise in the column direction such that the second grooves are aligned and separated from each other in the column direction to be in a second column having an another width in the row direction that is equal to the width of the second grooves in the row direction, the first column and the second column being adjacent to each other in the row direction and extending from one side of the window member to another side of the window member, and
wherein ones of the first grooves are offset from nearest ones of the second grooves in the row direction.
2 . The window member of claim 1 , wherein the one of the first and second grooves is at least partially defined by:
a first inner surface having a first side connected to the first surface, and extending flatly toward the second surface;
a second inner surface facing the first inner surface, having a first side connected to the first surface, and extending flatly toward the second surface; and
a rounded surface connecting a second side of the first inner surface and a second side of the second inner surface, the rounded surface being concave toward the second surface.
3 . The window member of claim 2 , wherein the first inner surface and the second inner surface are inclined such that the width of the one of the first and second grooves becomes narrower toward the second surface.
4 . The window member of claim 2 , wherein the rounded surface has an elliptical shape that is partially open toward the first surface in a cross-sectional view.
5 . The window member of claim 4 , wherein at least one of a length of a major axis of the elliptical shape or a length of a minor axis of the elliptical shape is substantially equal to a width between the first side of the first inner surface and the first side of the second inner surface.
6 . The window member of claim 1 , wherein the one of the first and second grooves is partially defined by a pair of protrusions protruding toward an inside thereof so that the width of the one of the first and second grooves decreases in a cross-sectional view.
7 . The window member of claim 1 , wherein the thickness of the window member at the portion at which the one of the first and second grooves is formed is less than or equal to about 30 μm.
8 . A display device comprising:
a display panel;
a window member on the display panel having a first surface facing the display panel in a thickness direction, and a second surface opposite to the first surface, and defining first and second grooves that are recessed from the first surface, and that have a width in a row direction; and
a filling member filled in one of the first and second grooves,
wherein the first grooves extend lengthwise in a column direction such that the first grooves are aligned and separated from each other in the column direction to be in a first column having a width in the row direction that is equal to the width of the first grooves in the row direction,
wherein the second grooves extend lengthwise in the column direction such that the second grooves are aligned and separated from each other in the column direction to be in a second column having an another width in the row direction that is equal to the width of the second grooves in the row direction, the first column and the second column being adjacent to each other in the row direction and extending from one side of the window member to another side of the window member, and
wherein ones of the first grooves are offset from nearest ones of the second grooves in the row direction.
9 . The display device of claim 8 , wherein the one of the first and second grooves is at least partially defined by:
a first inner surface that has a first side connected to the first surface of the window member, and that extends flatly toward the second surface of the window member;
a second inner surface that faces the first inner surface, that has a first side connected to the first surface of the window member, and that extends flatly toward the second surface of the window member; and
a rounded surface that connects a second side of the first inner surface and a second side of the second inner surface, and that is concave toward the second surface of the window member.
10 . The display device of claim 9 , wherein the first inner surface and the second inner surface are inclined such that the width of the one of the first and second grooves becomes narrower toward the second surface.
11 . The display device of claim 9 , wherein the rounded surface has an elliptical shape that is partially open toward the first surface of the window member in a cross-sectional view.
12 . The display device of claim 11 , wherein at least one of a length of a major axis of the elliptical shape or a length of a minor axis of the elliptical shape is equal to a width between the first side of the first inner surface and the first side of the second inner surface.
13 . The display device of claim 8 , wherein the one of the first and second grooves is partially defined by a pair of protrusions protruding toward an inside thereof so that the width of the one of the grooves decreases in a cross-sectional view.
14 . The display device of claim 8 , wherein a difference of respective refractive indexes of the window member and the filling member is about 0.0001 or less.
15 . The display device of claim 8 , wherein the second surface of the window member is directly exposed to outside of the display device.