Three-dimensional display device and displaying method using the same

1. A three-dimensional display device, comprising:

a display panel displaying first to n th partial images along a circumference; and

an n-gonal pyramid mirror including first to n th mirrors at n side surfaces, respectively, of the n-gonal pyramid mirror, wherein the first to n th mirrors reflect the first to n th partial images, respectively, and wherein each of the first to n th mirrors substantially makes a 45 degree angle with the display panel,

wherein an apex of the n-gonal pyramid mirror is below the display panel and is at a first distance from the display panel, wherein first to n th image planes corresponding to the first to n th partial images face the first to n th mirrors, respectively, and wherein each of the first to n th image planes is at the first distance from a center axis of the n-gonal pyramid mirror toward the corresponding mirror,

wherein the first to n th image planes forms n side surfaces of an n-gonal prism, and wherein a side of a regular n-gonal upper surface of the n-gonal prism has a length of a second distance and a distance between a center of the regular n-gonal upper surface of the n-gonal prism and the side of the regular n-gonal upper surface of the n-gonal prism is the first distance.

2. The device according to claim 1 , wherein an angle of each of the first to n th partial images incident on the corresponding mirror is within a 10 degree angle with respect to a line perpendicular to a plane of the display panel.

3. The device according to claim 1 , an upper surface of the n-gonal pyramid mirror has a regular n-gonal shape and is over the display panel.

4. The device according to claim 1 , wherein each of the first to n th mirrors has a isosceles triangular shape and has a reflectance more than 0% and equal to or less than 100%.

5. The device according to claim 1 , wherein an apex of the n-gonal pyramid mirror substantially contacts the display panel, wherein first to n th image planes corresponding to the first to n th partial images face the first to n th mirrors, respectively, and wherein each of the first to n th image planes has a center axis of the n-gonal pyramid mirror.

6. The device according to claim 1 , wherein a side of a regular n-gonal upper surface of the n-gonal pyramid mirror has a length of “a” and a distance between a center of the regular n-gonal upper surface of the n-gonal pyramid mirror and the side of the regular n-gonal upper surface of the n-gonal pyramid mirror is “b”, and wherein the second distance is expressed by an expression, D 2 =(a/b)*D 1 , where D 1 and D 2 are the first and second distances, respectively.

7. The device according to claim 6 , wherein the first to n th partial images, for which an image is divided, are set for adjacent partial images to be at the second distance from each other.

8. The device according to claim 1 , wherein n is one of 4, 5 and 6.

9. A method of displaying a three-dimensional image, comprising:

dividing an image to set first to n th partial images;

displaying the set first to n th partial images along a circumference in a display panel; and

reflecting the displayed first to n th partial images on first to n th mirrors, respectively, of an n-gonal pyramid mirror, wherein each of the first to n th mirrors substantially makes a 45 degree angle with the display panel,

wherein an apex of the n-gonal pyramid mirror is below the display panel and is at a first distance from the display panel, wherein a side of a regular n-gonal upper surface of the n-gonal pyramid mirror has a length of “a”, wherein a distance between a center of the regular n-gonal upper surface of the n-gonal pyramid mirror and the side of the regular n-gonal upper surface of the n-gonal pyramid mirror is “b”, wherein a second distance is expressed by an expression, D 2 =(a/b)*D 1 , where D 1 and D 2 are the first and second distances, respectively, and wherein the first to n th partial images are set for adjacent partial images to be at the second distance from each other.