Patent ID: 9733617
Date: 2017-08-15
CPC Classifications: G03H

Claim:
1. A display device comprising: a light generator, wherein the light generator includes a light source hologram unit multi-recorded with a 2D light source hologram and a hologram 3D light source hologram, wherein the light source hologram unit is manufactured by developing a holographic medium, wherein the light generator includes a reference light unit to irradiate a first reference light and a second reference light, wherein the 2D light source hologram is recorded by simultaneously irradiating a 2D light and the first reference light onto the holographic medium and the hologram 3D light source hologram is recorded by simultaneously irradiating a hologram 3D light and the second reference light onto the holographic medium, wherein the 2D light and the hologram 3D light are irradiated onto a same area of the holographic medium; a spatial light modulator that displays a 2D image or a hologram 3D image; a determination unit that determines a display mode; and a controller, wherein the controller controls the reference light unit to irradiate the first reference light onto the light source hologram unit such that the 2D light is generated from the light source hologram unit and controls the spatial light modulator to display the 2D image by using the generated 2D light when the display mode is a 2D mode, and wherein the controller controls the reference light unit to irradiate the second reference light onto the light source hologram unit such that the hologram 3D light is generated from the light source hologram unit and controls the spatial light modulator to display the hologram 3D image by using the generated hologram 3D light when the display mode is a hologram 3D mode, wherein the first reference light is diffracted by the 2D light source hologram and modulated into the 2D light, when the display mode is the 2D mode, wherein the second reference light is diffracted by the hologram 3D light source hologram and modulated into the hologram 3D light, when the display mode is the hologram 3D mode, wherein the first reference light and the second reference light are irradiated onto a same area of the light source hologram unit, wherein the generated 2D light is a diffused light and the generated hologram 3D light is a plane wave light or a spherical wave light, and wherein the spatial light modulator displays the 2D image over the spatial light modulator by modulating the diffused light and displays the hologram 3D image in a space by modulating the plane wave light or a spherical wave light.