Patent ID: 9389421
Filing Date: 2016-07-12
CPC Classification: G02B,G03H,G09G

Claim Text:
1. A display device which displays an original image to a user of the display device, the display device comprising: a light source which outputs laser light; an illumination optical system which emits the laser light as illumination light; a spatial modulation element which is illuminated by the illumination light, and diffracts the illumination light by displaying a diffraction pattern; a diffraction pattern acquiring unit which acquires a planar basic diffraction pattern, the planar basic diffraction pattern being different from the original image and being generated by performing calculation for each pixel value of the original image; and a diffraction pattern process unit which uses the planar basic diffraction pattern and a planar correction diffraction pattern for correcting the planar basic diffraction pattern to generate, as the diffraction pattern to be displayed on the spatial modulation element, a planar combined diffraction pattern obtained by overlapping the planar correction diffraction pattern on the planar basic diffraction pattern, wherein the spatial modulation element displays the planar combined diffraction pattern to diffract the illumination light to generate diffracted light, which is directed to a location of an eye of the user to create a fictive image, the planar combined diffraction pattern being generated to cause the fictive image to appear as the original image at a distance from the user.