Window and display device
A window includes: a window substrate including a bending portion bendable about a virtual bending axis that extends in a first direction; a plurality of groove patterns, which are defined in the bending portion, extend in the first direction, and are arranged in a second direction crossing the first direction; a sub groove, which is recessed into the window substrate from a pattern surface that define the plurality of at least one of groove patterns; and fillers, which fill the plurality of groove patterns and the sub groove. The sub groove includes a fixing region having a width that increases in a direction in which the sub groove is recessed.
1 . A window comprising:
a window substrate comprising a bending portion bendable about a bending axis that extends in a first direction;
a plurality of groove patterns recessed from a surface of the window substrate, which are defined in the bending portion, extend in the first direction, and are arranged in a second direction crossing the first direction;
a sub groove, which is further recessed into the window substrate from a pattern surface that defines at least one of the plurality of groove patterns; and
fillers, which fill the plurality of groove patterns and the sub groove,
wherein the sub groove comprises:
a fixing region having a width that increases in a direction in which the sub groove is further recessed such that in a cross-sectional view perpendicular to the first direction,
a first sub groove portion adjacent to the pattern surface and having a constant width over a length in the direction in which the sub groove is further recessed; and
a second sub groove portion extending from the first sub groove portion in the direction in which the sub groove is further recessed with a circular cross-section having a diameter exceeding the constant width, the second sub groove portion comprising the fixing region.
2 . The window of claim 1 , wherein each of the plurality of groove patterns comprises pattern side surfaces extending from a pattern lower surface to the surface of the window substrate.
3 . The window of claim 1 , wherein the plurality of groove patterns comprise an upper groove pattern recessed from an upper surface of the window substrate and a lower groove pattern recessed from a lower surface of the window substrate.
4 . The window of claim 3 , wherein the upper groove pattern and the lower groove pattern do not overlap each other in the thickness direction of the window substrate.
5 . The window of claim 3 , wherein the upper groove pattern is provided in plurality arranged in the second direction and the lower groove pattern is provided in plurality arranged in the second direction, wherein the plurality of upper groove patterns and the plurality of lower groove patterns do not overlap each other in the thickness direction of the window substrate.
6 . The window of claim 3 , wherein the sub groove is provided in plurality comprising:
an upper sub groove provided in the upper groove pattern; and
a lower sub groove provided in provided in the lower groove pattern.
7 . The window of claim 1 , wherein the sub groove is provided in plurality, and each of the plurality of groove patterns is provided with a plurality of sub grooves.
8 . The window of claim 7 , wherein each of the plurality of groove patterns comprises pattern side surfaces extending from a pattern lower surface to the surface of the window substrate, wherein the pattern lower surface comprises at least one of the plurality of sub grooves and the pattern side surfaces each include at least one of the plurality of sub grooves.
9 . The window of claim 1 , wherein in the cross-sectional view perpendicular to the first direction, the pattern surface is separated into two sections by the sub groove.
10 . The window of claim 1 , wherein the window substrate further comprises a first non-bending portion and a second non-bending portion which are spaced apart from each other in the second direction with the bending portion therebetween.
11 . The window of claim 1 , further comprising a window cover layer on the window substrate.
12 . A display device operating in a first mode and a second mode in which the display surface is larger than in the first mode, the display device comprising:
a display panel comprising a display bending portion bendable about a virtual bending axis that extends in the first direction;
a window substrate, which is disposed on the display panel and comprises a bending portion corresponding to the display bending portion;
a plurality of groove patterns recessed from a surface of the window substrate, which are defined in the bending portion, extend in the first direction, and are arranged in a second direction crossing the first direction;
a sub groove, which is further recessed into the window substrate from a pattern surface that defines at least one of the plurality of groove patterns; and
fillers, which fill the plurality of groove patterns and the sub groove,
wherein the sub groove comprises:
a fixing region having a width that increases in a direction in which the sub groove is further recessed such that in a cross-sectional view perpendicular to the first direction,
a first sub groove portion adjacent to the pattern surface and having a constant width over a length in the direction in which the sub groove is further recessed; and
a second sub groove portion extending from the first sub groove portion in the direction in which the sub groove is further recessed with a circular cross-section having a diameter exceeding the constant width, the second sub groove portion comprising the fixing region.
13 . A window comprising:
a window substrate comprising a bending portion bendable about a bending axis that extends in a first direction;
a plurality of groove patterns recessed from a surface of the window substrate, which are defined in the bending portion, extend in the first direction, and are arranged in a second direction crossing the first direction;
a sub groove, which is further recessed into the window substrate from a pattern surface that defines at least one of the plurality of groove patterns; and
fillers, which fill the plurality of groove patterns and the sub groove,
wherein, in a cross-sectional view perpendicular to the first direction, the sub groove has an anchor shape with a first sub groove portion adjacent the pattern surface and having a uniform width over a length and a distal end connected to a second sub groove portion having a circular shape with a diameter exceeding the uniform width such that the fillers are fixed to the sub groove.
14 . The window of claim 13 , wherein the plurality of groove patterns comprise an upper groove pattern recessed from an upper surface of the window substrate and a lower groove pattern recessed from a lower surface of the window substrate.
15 . The window of claim 14 , wherein the upper groove pattern is provided in plurality arranged in the second direction and the lower groove pattern is provided in plurality arranged in the second direction, wherein the plurality of upper groove patterns and the plurality of lower groove patterns do not overlap each other in the thickness direction of the window substrate.
16 . The window of claim 13 , wherein each of the plurality of groove patterns comprises pattern side surfaces extending from a pattern lower surface to the surface of the window substrate.
17 . The window of claim 16 , wherein the sub groove is provided in plurality, and each of the plurality of groove patterns is provided with a plurality of sub grooves.
18 . The window of claim 17 , wherein the pattern lower surface comprises at least one of the plurality of sub grooves and the pattern side surfaces each include at least one of the plurality of sub grooves.
19 . The window of claim 13 , wherein in the cross-sectional view perpendicular to the first direction, the pattern surface is separated into two sections by the sub groove.
20 . A display device operating in a first mode and a second mode in which a display device is larger than in the first mode, the display device comprising:
a display panel comprising a display bending portion corresponding to the window substrate bending portion; and
the window substrate of the window of claim 13 being disposed on the display panel.