Cover window and foldable display device including the same
The present invention provides a cover window including a first region having a first stiffness; a second region having a second stiffness being greater than the first stiffness; and a nano-particle in a boundary between the first and second regions.
1. A cover window, comprising:
a first region having a first stiffness;
a second region having a second stiffness greater than the first stiffness, the second region including a first portion and a second portion, wherein the first portion is closer to the first region than the second portion; and
a nano-particle in the first portion and not in the second portion,
wherein the first region has a first thickness, and the nano-particle is positioned within the first region at a second thickness smaller than the first thickness.
2. The cover window according to claim 1 , wherein the first region includes a pattern region and a non-pattern region at a periphery of the pattern region, and the nano-particle is positioned in one of the pattern region and the non-pattern region except the other one of the pattern region and the non-pattern region.
3. The cover window according to claim 1 , wherein the nano-particle has a size of about 50 to 500 nm.
4. The cover window according to claim 1 , wherein the nano-particle has a weight % of about 1 to 10 in a region including the nano-particle.
5. The cover window according to claim 1 , wherein the first region includes a pattern region and a non-pattern region at a periphery of the pattern region, and wherein the nano-particle has a first density in the pattern region and a second density in the non-pattern region, and the first density is different from the second density.
6. The cover window according to claim 5 , wherein one of the first and second density is 0.
7. The cover window according to claim 5 , wherein the first density is greater than the second density, and
wherein when the cover window is folded, the pattern region has a first transmittance, and the non-pattern region has a second transmittance being greater than the first transmittance.
8. The cover window according to claim 5 , wherein the first density is smaller than the second density, and
wherein when the cover window is folded, the pattern region has a first transmittance, and the non-pattern region has a second transmittance being smaller than the first transmittance.
9. The cover window according to claim 5 , wherein the first density is greater than the second density, and
wherein when the cover window is folded, the pattern region has a first haze, and the non-pattern region has a second haze being greater than the first transmittance.
10. The cover window according to claim 5 , wherein the first density is smaller than the second density, and
wherein when the cover window is folded, the pattern region has a first haze, and the non-pattern region has a second haze being smaller than the first transmittance.
11. A cover window, comprising:
a first region having a first stiffness and including a pattern region and a non-pattern region at a periphery of the pattern region;
a second region having a second stiffness greater than the first stiffness; and
a nano-particle in the first region,
wherein the nano-particle has a first density in the pattern region and a second density in the non-pattern region, and the first density is different from the second density,
wherein the cover window has a single-layered structure,
wherein the first region has a first thickness, and the nano-particle is positioned within the first region at a second thickness smaller than the first thickness.
12. The cover window according to claim 11 , wherein one of the first and second density is 0.
13. The cover window according to claim 11 , wherein the first density is greater than the second density, and
wherein when the cover window is folded, the pattern region has a first transmittance, and the non-pattern region has a second transmittance being greater than the first transmittance.
14. The cover window according to claim 11 , wherein the first density is smaller than the second density, and
wherein when the cover window is folded, the pattern region has a first transmittance, and the non-pattern region has a second transmittance being smaller than the first transmittance.
15. The cover window according to claim 11 , wherein the first density is greater than the second density, and
wherein when the cover window is folded, the pattern region has a first haze, and the non-pattern region has a second haze being greater than the first transmittance.
16. The cover window according to claim 11 , wherein the first density is smaller than the second density, and
wherein when the cover window is folded, the pattern region has a first haze, and the non-pattern region has a second haze being smaller than the first transmittance.
17. The cover window according to claim 11 , wherein the nano-particle has a size of about 50 to 500 nm.
18. A foldable display device, comprising:
a display panel; and
a cover window on a display side of the display panel, the cover window including:
a first region having a first stiffness;
a second region having a second stiffness greater than the first stiffness, the second region including a first portion and a second portion, wherein the first portion is closer to the first region than the second portion; and
a nano-particle in the first portion and not in the second portion,
wherein the cover window has a single-layered structure,
wherein the first region has a first thickness, and the nano-particle is positioned within the first region at a second thickness smaller than the first thickness.
19. A foldable display device, comprising:
a display panel; and
a cover window on a display side of the display panel, the cover window including:
a first region having a first stiffness and including a pattern region and a non-pattern region at a periphery of the pattern region;
a second region having a second stiffness greater than the first stiffness; and
a nano-particle in the first region,
wherein the nano-particle has a first density in the pattern region and a second density in the non-pattern region, and the first density is different from the second density,
wherein the cover window has a single-layered structure,
wherein the first region has a first thickness, and the nano-particle is positioned within the first region at a second thickness smaller than the first thickness.