Globe display device

1. A globe display device comprising:

a display unit in a shape of a sphere, the display unit generating a map image and displaying the map image;

a driving unit in the display unit, the driving unit being configured to drive the display unit;

a hologram generating unit in the display unit, the hologram generating unit being configured to display holograms on the display unit;

a sensing unit in the display unit, the sensing unit being configured to detect information according to user input; and

a control unit configured to control the driving unit and the hologram generating unit using values detected by the sensing unit,

wherein the control unit controls the map image generated by and displayed on the display unit to be inclined at a predetermined angle from a direction perpendicular to a land surface by utilizing tilt information detected by the sensing unit regardless of directions in which the display unit rotates or regardless of places where the display unit is located,

wherein the land surface is a surface on which the display unit is placed,

wherein a position of the map image generated by and displayed on the display unit does not change even when the display unit is rotated or relocated to a different place.

2. The globe display device of claim 1 , wherein the display unit comprises:

a flexible substrate;

a driver circuit on the flexible substrate;

a display element unit on the driver circuit; and

a thin film encapsulation layer on the display element unit.

3. The globe display device of claim 1 , wherein the driving unit comprises a communication module.

4. The globe display device of claim 1 , wherein the hologram generating unit comprises:

a light source configured to generate and emit a reference beam;

a first polarization member configured to polarize the reference beam emitted from the light source at a first polarization angle to generate a polarized reference beam;

a spatial light modulation unit configured to realize a holographic interference pattern corresponding to holographic interference pattern data supplied from an outside, and reconstruct and play back a three-dimensional image utilizing diffracted components of the holographic interference pattern, which are generated according to diffraction of the polarized reference beam passing through the holographic interference pattern; and

a second polarization member configured to polarize the diffracted components of the holographic interference pattern emitted from the spatial light modulation unit at a second polarization angle so as to remove a zero-order diffracted component from the diffracted components of the holographic interference pattern.

5. The globe display device of claim 4 , further comprising an optical member configured such that the reference beam emitted from the light source is adjusted to be uniformly irradiated onto the total effective area of the spatial light modulation unit.

6. The globe display device of claim 5 , wherein the spatial light modulation unit comprises a transmissive liquid crystal display panel comprising a liquid crystal layer disposed between an upper substrate and a lower substrate.

7. The globe display device of claim 6 , wherein the first polarization member is disposed between the light source and the optical member or between the optical member and the spatial light modulation unit.

8. The globe display device of claim 5 , wherein the spatial light modulation unit comprises a reflective liquid crystal display panel comprising a liquid crystal layer disposed between an upper substrate and a lower substrate, or a liquid crystal on silicon (LCOS) display panel.

9. The globe display device of claim 1 , wherein the predetermined angle is 23.44 degrees.

10. The globe display device of claim 1 , wherein the display unit further comprises a touch panel.

11. The globe display device of claim 10 , wherein the control unit increases or decreases a map image displayed on the display unit by using a location signal received by the touch panel.

12. The globe display device of claim 1 , further comprising a guide axis in the display unit.

13. The globe display device of claim 12 , wherein the display unit is rotatable about the guide axis.

14. The globe display device of claim 12 , further comprising a battery in the guide axis, the battery being configured to supply power to the display unit, the driving unit, the hologram generating unit, and the sensing unit.

15. The globe display device of claim 14 , further comprising a charger configured to charge the battery, the charger on which the display unit is seated.

16. The globe display device of claim 1 , wherein the display unit comprises any one of an organic light emitting diode, a liquid crystal display, and an electrophoretic display.

17. The globe display device of claim 1 , wherein the hologram generating unit is disposed in a central portion of the display unit.

18. The globe display device of claim 1 , the holograms is displayed with being spaced apart from the display unit by a predetermined distance.

19. The globe display device of claim 1 , the display unit is spaced 1132 mm or less apart from the hologram generating unit.

20. The globe display device of claim 1 , the sensor unit include a two-axis acceleration sensor detecting the tilting information.

21. The globe display device of claim 1 , wherein the control unit is configured to control an on-state or off state of the display unit based on an angular velocity of the display unit.