Display device

A display device comprising:

• a light source part including a first light source and a second light source;
• a collimation lens that collimates light incident from the light source part;
• a wave guide that guides and diffracts the light incident from the collimation lens;
• a spatial light modulator that modulates the light passing through the wave guide so as to form a holographic pattern for reproducing a holographic image;
• a focusing optical system that focuses the holographic image on a space located at a finite distance from the focusing optical system;
• and
• a light separating plate disposed between the light source part and the collimation lens, the light separating plate separating light of the first light source and light of the second light source from each other, and
• wherein the wave guide includes:
• a first diffraction pattern region in which the light of the first light source is diffracted;
• and
• a second diffraction pattern region in which the light of the second light source is diffracted, and
• wherein the first diffraction pattern region and the second diffraction pattern region are separated from each other by a reference line which is an optical axis of the collimation lens.