Elastic member and display device comprising same
An elastic member according to an embodiment includes: a first region and a second region, wherein a first direction is defined as a width direction of the elastic member and a second direction defined as a longitudinal direction of the elastic member, wherein the first region is defined as a folding region that is folded with the first direction as a folding axis, and the second region is defined as an unfolding region, wherein the elastic member includes a first layer and a second layer on the first layer; wherein the second layer includes a base material and fibers disposed inside the base material, wherein the fibers are disposed while extending in the second direction.
1 . An elastic member foldable with respect to a folding axis, the elastic member comprising:
a first region and a second region,
wherein a first direction is defined as a width direction of the elastic member and is a same direction as a direction in which the folding axis extends and a second direction is defined as a longitudinal direction of the elastic member and is a direction perpendicular to the direction in which the folding axis extends and the first direction,
wherein the first region is defined as a folding region that is folded with the first direction as the folding axis, and the second region is defined as an unfolding region,
wherein the elastic member includes a first layer, a second layer disposed on the first layer, and a third layer disposed between the first layer and the second layer,
wherein the first layer includes a metal,
wherein the second layer includes a base material and fibers disposed inside the base material,
wherein the fibers provided in the second layer are disposed in the second layer to extend in the second direction, which is a direction perpendicular to the direction in which the folding axis extends and the first direction,
wherein the third layer is an adhesive layer disposed between the first layer and the second layer,
wherein the first layer includes a first void disposed in the first region of the first layer, and
wherein the third layer includes a second void disposed in the first region of the third layer.
2 . The elastic member of claim 1 , wherein a thickness of the second layer is 15 μm to 200 μm.
3 . The elastic member of claim 1 , further comprising an alignment mark, wherein the alignment mark is disposed on the surface of the second layer and defines the longitudinal direction of the fibers.
4 . The elastic member of claim 1 , wherein the first layer further comprises non-metal.
5 . The elastic member of claim 1 , wherein a diameter of the fibers is 0.0001 mm to 0.01 mm.
6 . The elastic member of claim 1 , wherein the second layer includes a 1a region corresponding to the first region and a 2a region corresponding to the second region, wherein the fibers are disposed in the 1a region and the 2a region.
7 . The elastic member of claim 6 , wherein an overlapping region between the fibers and the 1a region is greater than an overlapping region between the fibers and the 2a region.
8 . The elastic member of claim 6 , wherein an overlapping region between the fibers and the 1a region is smaller than an overlapping region between the fibers and the 2a region.
9 . The elastic member of claim 6 , wherein a volume % of the fibers with respect to the total area of the 2a region is smaller than the volume % of the fibers with respect to the total area of the 1a region.
10 . The elastic member of claim 1 , wherein the second layer includes a 1a region corresponding to the first region and a 2a region corresponding to the second region,
wherein the fibers are disposed in any one of the 1a region and the 2a region.
11 . The elastic member of claim 1 , wherein the second layer further comprises fibers that extend tilted with respect to the longitudinal direction of the first layer.
12 . The elastic member of claim 1 , wherein the first layer includes a first base material and a first fiber,
wherein the second layer includes a second base material and a second fiber.
13 . The elastic member of claim 12 , wherein the first base material and the second base material include different materials,
wherein the first fiber and the second fiber include different materials.
14 . The elastic member of claim 1 , wherein the first void and the second void have different widths.
15 . The elastic member of claim 1 , wherein a width of the first void is smaller than a width of the second void.
16 . A display device comprising:
an elastic member of claim 1 ;
a protective layer under the elastic member;
an adhesive layer on the elastic member; and
a panel layer on the adhesive layer,
wherein the panel layer includes at least one of a display panel and a touch panel.