3D holographic display device and operating method of the same

A three-dimensional holographic display device comprising:

• a light emitting diode (LED) array comprising a plurality of light sources comprising a plurality of light source sets controlled to sequentially output light according to a preset pattern in a unit of light source set, each of the plurality of light source sets comprising M×N light sources among the plurality of light sources, each of M and N being 2 or more;
• a lens configured to refract light incident from the LED array;
• a spatial light modulator (SLM) configured to modulate light incident from the lens;
• and
• a processor configured to:
• generate a plurality of holographic signals each comprising depth information adjusted according to an arrangement location of each light source set of the plurality of light source sets, and
• for each of the plurality of light source sets, control the SLM to modulate the light based on a holographic signal corresponding to a light source set of the plurality of light source sets,
• wherein the three-dimensional holographic display device further comprises a driving device configured to move the LED array in at least one of a first direction, a second direction perpendicular to the first direction, and a third direction perpendicular to both of the first direction and the second direction, or rotate the LED array around at least one of the first direction, the second direction, and the third direction, as an axis.