Mobile device capable of displaying hologram and hologram display method

1. A mobile device comprising:

a main body comprising a screen, a planar surface of the screen comprising a first pixel area and a second pixel area that is different from the first pixel area;

a light guide member longitudinally spaced apart from the screen and disposed above the first pixel area of the screen and the second pixel area of the screen;

an entrance optical member longitudinally spaced apart from the screen and disposed on the light guide member; and

an image hologram, laterally spaced apart from the entrance optical member, longitudinally spaced apart from the screen and disposed on the light guide member at a position corresponding to the second pixel area of the screen,

wherein the first pixel area of the screen is disposed such that light emitted from the first pixel area of the screen is incident on the entrance optical member, is transmitted through the light guide member, and is incident on the image hologram, thereby displaying a holographic image stored in the image hologram above the image hologram, and

wherein the planar surface of the screen is substantially parallel to a surface of the light guide member.

2. The mobile device as claimed in claim 1 , further comprising:

a flip cover configured to substantially cover the screen in a closed position and to expose the screen in an open position,

wherein:

the flip cover has an opening therein,

the light guide member is disposed within the flip cover, and

the image hologram is disposed on a portion of the light guide member corresponding to the opening of the flip cover.

3. The mobile device as claimed in claim 2 , wherein

a size of the light guide member is the same as a size of the opening in the flip cover.

4. The mobile device as claimed in claim 1 , wherein

the entrance optical member and the image hologram are disposed on the same surface of the light guide member.

5. The mobile device as claimed in claim 4 , wherein

the entrance optical member and the image hologram are disposed on a bottom surface of the light guide member, and

wherein the entrance optical member is a transmissive hologram optical element, and the image hologram is a reflective hologram.

6. The mobile device as claimed in claim 4 , wherein

the entrance optical member and the image hologram are disposed on an upper surface of the light guide member, and

wherein the entrance optical member is a reflective hologram optical element, and the image hologram is a transmissive hologram.

7. The mobile device as claimed in claim 1 , wherein

the entrance optical member is disposed on a first surface of the light guide member and the image hologram is disposed on a second surface of the light guide member, opposite the first surface.

8. The mobile device as claimed in claim 7 , wherein

the entrance optical member is disposed on a bottom surface of the light guide member, and the image hologram is disposed on an upper surface of the light guide member, and

wherein the entrance optical member is a transmissive hologram optical element, and the image hologram is a transmissive hologram.

9. The mobile device as claimed in claim 7 , wherein

the entrance optical member is disposed on an upper surface of the light guide member, and the image hologram is disposed on a bottom surface of the light guide member, and

wherein the entrance optical member is a reflective hologram optical element, and the image hologram is a reflective hologram.

10. The mobile device as claimed in claim 1 , wherein

the entrance optical member comprises at least one of a hologram optical element, a diffraction grating, and a prismatic sheet.

11. The mobile device as claimed in claim 1 , wherein

the image hologram stores a complete three-dimensional holographic image.

12. The mobile device as claimed in claim 1 , wherein

the entrance optical member comprises at least two entrance optical elements.

13. The mobile device as claimed in claim 12 , wherein

the image hologram stores a color image, and

the at least two entrance optical elements comprise an entrance optical element which refracts red light, an entrance optical element which refracts blue light, and an entrance optical element which refracts green light.

14. The mobile device as claimed in claim 1 , wherein

the image hologram comprises a plurality of image holograms, and

the entrance optical member comprises a plurality of entrance optical members corresponding to the plurality of image holograms.

15. The mobile device as claimed in claim 14 , further comprising:

a controller, wherein:

the plurality of image holograms are coordinated with a plurality of specific events, such that upon the occurrence of one of the plurality of specific events, the controller controls a coordinated one of the plurality of image holograms to be displayed.

16. The mobile device as claimed in claim 1 , wherein

the image hologram is transparent.

17. The mobile device as claimed in claim 1 , wherein the entrance optical member is interposed between the light guide member and the first pixel area of the screen.

18. The mobile device as claimed in claim 17 , wherein the second pixel area of the screen is configured to display an image that is viewable through the image hologram and the light guide member.

19. A hologram display device comprising:

a screen configured to emit light, a planar surface of the screen comprising a first pixel area and a second pixel area that is different from the first pixel area;

a light guide member longitudinally spaced apart from the screen and disposed above the first pixel area of the screen and the second pixel area of the screen;

an entrance optical member longitudinally spaced apart from the screen and disposed on a surface of the light guide member;

an image hologram, longitudinally spaced apart from the screen and disposed on a surface of the light guide member at a position corresponding to the second pixel area of the screen;

wherein the entrance optical member and the image hologram are configured such that light emitted from the first pixel area of the screen is incident on the entrance optical member, is transmitted through the light guide member by total internal reflection, and is incident on the image hologram, thereby displaying a holographic image stored in the image hologram above the image hologram, and

wherein the planar surface of the screen is substantially parallel to a surface of the light guide member.