Foldable display device
A foldable display device includes a display panel in which at least a partial area includes a transparent display panel; and a floating screen connected to the display panel and reflecting an image displayed on the display panel. Therefore, a foldable display device which uses a floating screen and a display panel to display an image has more three-dimensional effect.
1 . A foldable display device, comprising:
a display panel; and
a floating screen having one end contacting or connected to the display panel and an opposing end not attached to the display panel,
wherein the display panel includes:
a non-transparent display panel; and
a transparent display panel which is connected to the non-transparent display panel, self-luminous, and configured to transmit a background, and
wherein the floating screen reflects an image displayed on the non-transparent display panel.
2 . The foldable display device according to claim 1 , further comprising:
a first non-folding area, a second non-folding area, and a first folding area between the first non-folding area and the second non-folding area,
wherein the transparent display panel is disposed in the first non-folding area, the non-transparent display panel is disposed in the second non-folding area, and the floating screen is disposed between the transparent display panel and the non-transparent display panel.
3 . The foldable display device according to claim 2 , further comprising:
a hinge unit connecting the transparent display panel and the floating screen and supporting the floating screen when the first folding area is folded.
4 . The foldable display device according to claim 3 , wherein when the transparent display panel and the non-transparent display panel are folded to be perpendicular to each other, an angle formed by the floating screen and the non-transparent display panel is 45 degrees or larger.
5 . The foldable display device according to claim 1 , wherein an image displayed on the transparent display panel and the image displayed on the non-transparent display panel are images obtained by photographing the same object at different focal points.
6 . The foldable display device according to claim 1 , wherein an image displayed on the transparent display panel is a background image and the image displayed on the non-transparent display panel is an object image displayed in the background image.
7 . The foldable display device according to claim 2 , further comprising:
a first gap maintaining unit disposed between the transparent display panel and the non-transparent display panel in the first folding area.
8 . The foldable display device according to claim 7 , further comprising:
a bottom plate disposed below the display panel and the first gap maintaining unit and including a plurality of patterns in an area corresponding to the first folding area.
9 . The foldable display device according to claim 8 , wherein the bottom plate is formed of glass.
10 . The foldable display device according to claim 2 , further comprising:
an opaque back plate configured to slide below the display panel to overlap any one of the transparent display panel and the non-transparent display panel.
11 . The foldable display device according to claim 1 , further comprising:
a first non-folding area, a second non-folding area, and a first folding area between the first non-folding area and the second non-folding area,
wherein the display panel includes a single transparent display panel disposed in the first non-folding area, the first folding area, and the second non-folding area, and the floating screen is disposed to be rotatable at one end of the transparent display panel.
12 . The foldable display device according to claim 11 , further comprising:
an opaque back plate disposed below the display panel to overlap the entire display panel.
13 . The foldable display device according to claim 1 , further comprising:
a first non-folding area, a second non-folding area, a third non-folding area, a first folding area between the first non-folding area and the second non-folding area, and a second folding area between the second non-folding area and the third non-folding area,
wherein the display panel includes a first non-transparent display panel disposed in the first non-folding area, a second non-transparent display panel disposed in the second non-folding area, and a transparent display panel disposed in the third non-folding area, and the floating screen is disposed to be rotatable at one end of the transparent display panel.
14 . The foldable display device according to claim 13 , further comprising:
a first gap maintaining unit which is disposed between the first non-transparent display panel and the second non-transparent display panel in the first folding area; and
a second gap maintaining unit which is disposed between the second non-transparent display panel and the transparent display panel in the second folding area.
15 . The foldable display device according to claim 1 ,
wherein the floating screen includes:
a base member;
a first layer disposed on the base member and including a plurality of concave portions; and
a second layer filling the plurality of concave portions of the first layer and having a refractive index higher than that of the first layer.
16 . The foldable display device according to claim 15 , wherein each of the plurality of concave portions has an asymmetric shape in a width direction.
17 . The foldable display device according to claim 15 , wherein surfaces of the plurality of concave portions are formed by a plurality of flat surfaces.
18 . The foldable display device according to claim 15 , wherein the plurality of concave portions is formed by a curved surface and a flat surface, and a width of the curved surface is larger than a width of the flat surface.
19 . The foldable display device of claim 1 , wherein the display panel further includes a gap maintaining unit connected directly between the non-transparent display panel and the transparent display panel.
20 . The foldable display device of claim 19 , wherein:
the gap maintaining unit includes a compressible material; and
the non-transparent display panel and the transparent display panel are foldable toward each other as a shape of the gap maintaining unit changes.