Flexible display and electronic device including the same
Disclosed are a flexible display and an electronic device including the same, in the flexible display, a back plate has an improved structure so as to stably support a display panel even during repeated folding and unfolding operations, and also the flexible display can prevents sagging or deformation of specific constituent elements therein.
1. A flexible display, comprising:
a display panel; and
a back plate divided into a folding portion and a non-folding portion, the back plate including
a first layer formed of a material having stiffness higher than a stiffness of the display panel,
a first opening pattern formed in the first layer and corresponding to the folding portion, the first opening pattern having a first density of empty space, and
a second opening pattern formed in the first layer and corresponding to the non-folding portion, the second opening pattern having a second density of empty space lower than the first density.
2. The flexible display according to claim 1 , wherein the non-folding portion is divided into two or more areas, a first area of the two or more areas includes the second opening pattern having the second density, and a second area of the two or more areas includes a third opening pattern having a density of empty space different from the first and second densities.
3. The flexible display according to claim 2 , wherein the second density of a portion of the second opening pattern at a first distance from the folding portion is lower than the first density, and the third density of a portion of the third opening pattern at a second distance from the folding portion is lower than the second density, the second distance being greater than the first distance.
4. The flexible display according to claim 1 , wherein the first density is uniform in the folding portion, and
wherein the second density decreases in the non-folding portion with increasing distance from the folding portion.
5. The flexible display according to claim 1 , wherein the first layer includes at least one of stainless steel, amorphous metal, amorphous silicon, and Invar.
6. The flexible display according to claim 1 , wherein the back plate further comprises a skin layer on at least one surface of the first layer.
7. The flexible display according to claim 1 , further comprising a first adhesive layer between the display panel and the back plate.
8. The flexible display according to claim 6 , wherein the skin layer is formed of a resin.
9. The flexible display according to claim 8 , wherein at least one of the first opening pattern and the second opening pattern is filled with the resin.
10. The flexible display according to claim 6 , wherein the back plate further comprises an adhesive layer between the first layer and the skin layer.
11. The flexible display according to claim 10 , wherein the skin layer has a higher elastic restoration ability than the first layer.
12. The flexible display according to claim 11 , wherein the skin layer includes at least one of stainless steel, amorphous metal, amorphous silicon, and Invar.
13. The flexible display according to claim 10 , wherein the adhesive layer is exposed by the first and second opening patterns.
14. The flexible display according to claim 10 , wherein a space is provided within at least one of the first and second opening patterns between the adhesive layer and a surface of the first layer that is not in contact with the adhesive layer, and wherein a thickness of the space is equal to or less than a thickness of the first layer.
15. The flexible display according to claim 1 , wherein the first opening pattern includes openings arranged in a plurality of columns in the folding portion.
16. The flexible display according to claim 1 , wherein the first opening pattern is divided into a plurality of patterns each having columns with a discontinuous portion separating adjacent openings in each column.
17. The flexible display according to claim 16 , wherein a first discontinuous portion in a first column is located in a different row than a second discontinuous portion in a second column adjacent to the first column.
18. The flexible display according to claim 11 , wherein the skin layer has a thickness that is thinner than a thickness of the first layer.
19. The flexible display according to claim 1 , the folding portion having edges without an opening of the first opening pattern exposed on the edges.
20. An electronic device, comprising:
a display panel;
a back plate divided into a folding portion and a non-folding portion, the back plate including
a first layer formed of a material having stiffness higher than a stiffness of the display panel,
a first opening pattern formed in the first layer and corresponding to the folding portion, the first opening pattern having a first density of empty space, and
a second opening pattern formed in the first layer and corresponding to the non-folding portion, the second opening pattern having a second density of empty space lower than the first density; and
a case accommodating the display panel and the back plate therein.